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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">As filed with the U.S. Securities and Exchange Commission on December 17, 2020<font style="font-weight:normal;"> </font></p>
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Registration No. 333- </p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:16pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">UNITED STATES</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:16pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">SECURITIES AND EXCHANGE COMMISSION</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Washington, D.C. 20549</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><img src="g23gjhpzhlcs000001.jpg" title="" alt="" style="width:39px;height:1px;"></p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:16pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">FORM S-8</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">REGISTRATION STATEMENT</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">UNDER</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">THE SECURITIES ACT OF 1933</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><img src="g23gjhpzhlcs000002.jpg" title="" alt="" style="width:39px;height:1px;"></p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:16pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ARCA biopharma, Inc.</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Exact name of registrant as specified in its charter)</p>
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<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:49%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Delaware</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:49%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">36-3855489</p></td>
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<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:49%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(State or other jurisdiction of Incorporation or organization)</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:49%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(I.R.S. Employer Identification No.)</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">10170 Church Ranch Way, Suite 100</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Westminster, CO 80021</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Address of principal executive offices) (Zip code)</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ARCA biopharma, Inc. 2020 Equity Incentive Plan</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Full title of the plan)</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Michael R. Bristow</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">President and Chief Executive Officer</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ARCA biopharma, Inc.</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">10170 Church Ranch Way, Suite 100</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Westminster, CO 80021 </p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(720) 940-2200 </p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Name and address of agent for service) (Telephone number, including area code, of agent for service)</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><img src="g23gjhpzhlcs000003.jpg" title="" alt="" style="width:39px;height:1px;"></p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Copies to:</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Brent D. Fassett</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">COOLEY LLP</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">380 Interlocken Crescent, Suite 900</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Broomfield, CO 80021</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(720) 566-4000</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><img src="g23gjhpzhlcs000004.jpg" title="" alt="" style="width:39px;height:1px;"></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer,&#8221; &#8220;smaller reporting company,&#8221; and &#8220;emerging growth company&#8221; in Rule 12b-2 of the Exchange Act.</p>
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<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:60%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Large accelerated filer <font style="font-family:'Times New Roman';">o</font></p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.66%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:37.34%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Accelerated filer <font style="font-family:'Times New Roman';">o</font></p></td>
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<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:60%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Non-accelerated filer <font style="font-family:'Times New Roman';">x</font> </p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.66%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:37.34%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Smaller reporting company <font style="font-family:'Times New Roman';">x</font></p></td>
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<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:60%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.66%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:37.34%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Emerging growth company <font style="font-family:'Times New Roman';">o</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. <font style="font-family:'Times New Roman';">o</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">CALCULATION OF REGISTRATION FEE</p>
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<table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse;  margin-left:0.05%;width:99.95%;">
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<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:38.08%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:6pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Title of Securities<br />to be Registered</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:1.76%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:11.58%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:6pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Amount to be<br />Registered(1)</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:5.26%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:9.82%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:6pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Proposed<br />Maximum<br />Offering<br />Price per<br />Share</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:5.18%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:13.32%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:6pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Proposed<br />Maximum<br />Aggregate<br />Offering Price</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:2.04%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:12%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:6pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Amount of<br />Registration Fee</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:1.1pt;padding-Bottom:0.5pt;width:0.96%; border-top:double 2.5pt #000000; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:38.08%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Common Stock, par value $0.001 per share</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:1.76%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:11.58%; border-bottom:solid 1pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:5.26%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:9.82%; border-bottom:solid 1pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:5.18%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:13.32%; border-bottom:solid 1pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:2.04%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:12%; border-bottom:solid 1pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:0.96%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:38.08%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#8212; Shares reserved for future grant under the 2020 Equity Incentive Plan</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:1.76%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:11.58%; border-bottom:solid 1pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">1,167,425</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:5.26%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(2)</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:1.12%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">$</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:8.7%; border-bottom:solid 1pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4.12</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:5.18%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(3)</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:1.12%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">$</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:12.2%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4,809,791.00</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:2.04%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:1.12%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">$</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:10.88%; border-bottom:solid 1pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">524.75</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:0.96%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:38.08%; border-bottom:double 2.5pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:20pt;;text-indent:-10pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Total</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:1.76%; border-bottom:double 2.5pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:11.58%; border-bottom:double 2.5pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">1,167,425</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:5.26%; border-bottom:double 2.5pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:9.82%; border-bottom:double 2.5pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">N/A</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:5.18%; border-bottom:double 2.5pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:1.12%; border-bottom:double 2.5pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">$</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:12.2%; border-bottom:double 2.5pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4,809,791.00</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:2.04%; border-bottom:double 2.5pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:1.12%; border-bottom:double 2.5pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">$</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:10.88%; border-bottom:double 2.5pt #000000;">
<p style="text-align:right;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">524.75</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:1.1pt;width:0.96%; border-bottom:double 2.5pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
</tr>
</table></div>
<div align="left">
<table border="0" cellspacing="0" cellpadding="0"  style="border-collapse:collapse; width:100%;">
<tr>
<td valign="top" style="width:3.85%;white-space:nowrap">
<p style="margin-bottom:0pt;margin-top:0pt;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(1)</font></p></td>
<td valign="top">
<p style="margin-bottom:0pt;margin-top:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:8pt;"><font style="font-size:5pt;"> </font>Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the &#8220;<font style="font-weight:bold;font-style:italic;">Securities Act</font>&#8221;), this Registration Statement shall also cover any additional shares of Registrant&#8217;s common stock, par value $0.001 per share (the &#8220;<font style="font-weight:bold;font-style:italic;">Common Stock</font>&#8221;), that become issuable under the Registrant&#8217;s 2020 Equity Incentive Plan (the &#8220;<font style="font-weight:bold;font-style:italic;">2020 Plan</font>&#8221;) by reason of any stock dividend, stock split, recapitalization or other similar transaction that results in an increase in the number of outstanding shares of Common Stock.</p></td></tr></table></div>
<div align="left">
<table border="0" cellspacing="0" cellpadding="0"  style="border-collapse:collapse; width:100%;">
<tr>
<td valign="top" style="width:3.85%;white-space:nowrap">
<p style="margin-bottom:0pt;margin-top:0pt;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(</font><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">2</font><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">)</font></p></td>
<td valign="top">
<p style="margin-bottom:0pt;margin-top:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:8pt;">Pursuant to the terms of the 2020 Plan, any shares subject to outstanding awards originally granted under the Registrant&#8217;s Amended and Restated 2013 Equity Incentive Plan (the &#8220;<font style="font-weight:bold;font-style:italic;">2013 Plan</font>&#8221;) that would have returned to the 2013 Plan due to expiration, termination, forfeiture or repurchase, or due to being settled in cash instead of stock, shall become available for future issuance pursuant to the 2020 Plan.</p></td></tr></table></div>
<div align="left">
<table border="0" cellspacing="0" cellpadding="0"  style="border-collapse:collapse; width:100%;">
<tr>
<td valign="top" style="width:3.85%;white-space:nowrap">
<p style="margin-bottom:0pt;margin-top:0pt;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(</font><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3</font><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">)</font></p></td>
<td valign="top">
<p style="margin-bottom:0pt;margin-top:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:8pt;">Estimated in accordance with Rule 457(h) and Rule 457(c) promulgated under the Securities Act solely for the purpose of calculating the registration fee. The offering price per share and the aggregate offering price are based upon the average high and low prices of the Common Stock as reported on The Nasdaq Capital Market on December 16, 2020.</p></td></tr></table></div>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><img src="g23gjhpzhlcs000005.jpg" title="" alt="" style="width:624px;height:3px;"></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><br /></p>
<hr style="page-break-after:always;width:100%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">PART II</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ITEM 3.&nbsp;&nbsp;INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The following documents filed by ARCA biopharma, Inc. (the &#8220;<font style="font-weight:bold;font-style:italic;">Registrant</font>&#8221;) with the Securities and Exchange Commission (the &#8220;<font style="font-weight:bold;font-style:italic;">Commission</font>&#8221;) are incorporated by reference into this Registration Statement:</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:11.54%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(a)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="Background-color:#FFFFFF;color:#000000;font-weight:normal;">The Registrant&#8217;s Annual Report on Form 10-K </font><font style="font-weight:normal;color:#000000;">(File No. 000-22873) </font><font style="Background-color:#FFFFFF;color:#000000;font-weight:normal;">for the fiscal year ended December 31, 2019 filed on </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005032/abio-10k_20191231.htm"><font style="text-decoration:underline;color:#0000FF;letter-spacing:-0.1pt;font-weight:normal;">February</font><font style="text-decoration:underline;color:#0000FF;letter-spacing:-0.05pt;font-weight:normal;">&#160;18,&#160;2020</font></a><font style="Background-color:#FFFFFF;"> pursuant to Sections 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the &#8220;</font><font style="font-style:italic;Background-color:#FFFFFF;color:#000000;">Exchange Act</font><font style="Background-color:#FFFFFF;color:#000000;font-weight:normal;">&#8221;).</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:11.54%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(b)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="Background-color:#FFFFFF;color:#000000;font-weight:normal;">The Registrant&#8217;s Quarterly Reports on Form 10-Q </font><font style="font-weight:normal;color:#000000;">(File No. 000-22873) </font><font style="Background-color:#FFFFFF;color:#000000;font-weight:normal;">for the fiscal quarters ended March 31, 2020, June 30, 2020 and September 30, 2020 filed on </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020021946/abio-10q_20200331.htm"><font style="text-decoration:underline;font-weight:normal;color:#000000;">May 6,&#160;2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020021946/abio-10q_20200331.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020036784/abio-10q_20200630.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">August 5, 2020</font></a><font style="Background-color:#FFFFFF;"> and </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020021946/abio-10q_20200331.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020036784/abio-10q_20200630.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020049656/abio-10q_20200930.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">November&#160;2, 2020</font></a><font style="Background-color:#FFFFFF;">, respectively, pursuant to Sections 13(a) or 15(d) of the Exchange Act.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:11.54%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:11.54%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(c)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="Background-color:#FFFFFF;color:#000000;font-weight:normal;">The Registrant&#8217;s Current Reports on Form 8-K </font><font style="font-weight:normal;color:#000000;">(File No. 000-22873) (other than Current Reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits furnished on such form that relate to such items) filed on </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><font style="text-decoration:underline;font-weight:normal;color:#000000;">February 18, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><font style="text-decoration:underline;font-weight:normal;color:#000000;">March 4, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><font style="text-decoration:underline;font-weight:normal;color:#000000;">May&#160;28, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><font style="text-decoration:underline;font-weight:normal;color:#000000;">June 1, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><font style="text-decoration:underline;font-weight:normal;color:#000000;">June 3, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><font style="text-decoration:underline;font-weight:normal;color:#000000;">July 2, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><font style="text-decoration:underline;font-weight:normal;color:#000000;">July 14, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020033048/abio-8k_20200722.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">July 22, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020033048/abio-8k_20200722.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020039733/abio-8k_20200812.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">August 12, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020033048/abio-8k_20200722.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020039733/abio-8k_20200812.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020042033/abio-8k_20200829.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">August 31, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020033048/abio-8k_20200722.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020039733/abio-8k_20200812.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020042033/abio-8k_20200829.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020044129/abio-8k_20200921.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">September 21, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020033048/abio-8k_20200722.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020039733/abio-8k_20200812.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020042033/abio-8k_20200829.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020044129/abio-8k_20200921.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020045968/abio-8k_20201007.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">October 7, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020033048/abio-8k_20200722.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020039733/abio-8k_20200812.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020042033/abio-8k_20200829.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020044129/abio-8k_20200921.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020045968/abio-8k_20201007.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020054891/abio-8k_20201123.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">November 23, 2020</font></a><font style="Background-color:#FFFFFF;">, </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020033048/abio-8k_20200722.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020039733/abio-8k_20200812.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020042033/abio-8k_20200829.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020044129/abio-8k_20200921.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020045968/abio-8k_20201007.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020054891/abio-8k_20201123.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020056751/abio-8k_20201210.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">December 10, 2020</font></a><font style="Background-color:#FFFFFF;"> and </font><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020005048/abio-8k_20200218.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020008703/abio-8k_20200303.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027369/abio-8k_20200528.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020027745/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020028159/abio-8k_20200601.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020031680/abio-8k_20200702.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020032355/abio-8k_20200714.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020033048/abio-8k_20200722.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020039733/abio-8k_20200812.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020042033/abio-8k_20200829.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020044129/abio-8k_20200921.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020045968/abio-8k_20201007.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020054891/abio-8k_20201123.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020056751/abio-8k_20201210.htm"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020057156/abio-8k_20201215.htm"><font style="Background-color:#FFFFFF;text-decoration:underline;font-weight:normal;">December 15, 2020</font></a><font style="Background-color:#FFFFFF;"> pursuant to Sections 13(a) or 15(d) of the Exchange Act.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:11.54%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:11.54%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(d)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">All other reports and documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (other than Current Reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits furnished on such form that relate to such items) on or after the date of this Registration Statement and prior to the filing of a post-effective amendment to this Registration Statement which indicates that all securities offered have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference herein and to be a part of this Registration Statement from the date of the filing of such reports and documents. Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any subsequently filed document that also is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:11.54%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:11.54%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(e)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">The description of the Registrant&#8217;s common stock contained in the Registrant&#8217;s Registration Statement on Form 8-A filed on </font><a href="http://www.sec.gov/Archives/edgar/data/907654/0001012870-97-001300.txt"><font style="text-decoration:underline;font-weight:normal;color:#000000;">July 23, 1997</font></a><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"> (File No. 000-22873) under the Exchange Act, including any amendment or report filed for the purpose of updating such description.</font></p>
<p style="margin-top:0pt;margin-bottom:0pt;margin-left:11.54%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ITEM 4.&nbsp;&nbsp;DESCRIPTION OF SECURITIES.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Not applicable.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ITEM 5.&nbsp;&nbsp;INTERESTS OF NAMED EXPERTS AND COUNSEL.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Not applicable.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ITEM 6.&nbsp;&nbsp;INDEMNIFICATION OF DIRECTORS AND OFFICERS.</p>
<p style="Background-color:#FFFFFF;margin-top:6pt;margin-bottom:0pt;text-indent:7.69%;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Subsection (a) of&#160;Section 145&#160;of the Delaware General Corporation Law (the &#8220;<font style="font-weight:bold;font-style:italic;">DGCL</font>&#8221;) empowers a corporation to indemnify any person who was or is a party or who is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys&#8217; fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person&#8217;s conduct was unlawful.</p>
<p style="Background-color:#FFFFFF;margin-top:12pt;margin-bottom:0pt;text-indent:5.24%;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Subsection (b) of&#160;Section 145&#160;of the DGCL empowers a corporation to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person acted in any of the capacities set forth above, against expenses (including attorneys&#8217; fees) actually and reasonably incurred by the person in </p>
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<p style="Background-color:#FFFFFF;margin-top:12pt;margin-bottom:0pt;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">connection with the defense or settlement of such action or suit if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or such other court shall deem proper.</font></p>
<p style="Background-color:#FFFFFF;margin-top:12pt;margin-bottom:0pt;text-indent:5.24%;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Section 145 of the DGCL further provides that to the extent a director or officer of a corporation has been successful on the merits or otherwise in the defense of any action, suit or proceeding referred to in subsections (a) and (b) of&#160;Section 145, or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys&#8217; fees) actually and reasonably incurred by such person in connection therewith; that indemnification provided for by&#160;Section 145&#160;shall not be deemed exclusive of any other rights to which the indemnified party may be entitled; and the indemnification provided for by&#160;Section 145&#160;shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of such person&#8217;s heirs, executors and administrators.&#160;Section 145&#160;also empowers the corporation to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against such person and incurred by such person in any such capacity, or arising out of his status as such, whether or not the corporation would have the power to indemnify such person against such liabilities under Section 145.</p>
<p style="Background-color:#FFFFFF;margin-top:12pt;margin-bottom:0pt;text-indent:5.24%;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Section 102(b)(7) of the DGCL provides that a corporation&#8217;s certificate of incorporation may contain a provision eliminating or limiting the personal liability of a director to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, provided that such provision shall not eliminate or limit the liability of a director (i) for any breach of the director&#8217;s duty of loyalty to the corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the DGCL, or (iv) for any transaction from which the director derived an improper personal benefit.</p>
<p style="Background-color:#FFFFFF;margin-top:12pt;margin-bottom:0pt;text-indent:5.24%;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The Registrant&#8217;s certificate of incorporation contains provisions that eliminate, to the maximum extent permitted by the DGCL, the personal liability of directors and executive officers for monetary damages for breach of their fiduciary duties as a director or officer. The Registrant&#8217;s certificate of incorporation and bylaws provide that the Registrant shall indemnify its directors and executive officers and may indemnify its employees and other agents to the fullest extent permitted by the DGCL.</p>
<p style="Background-color:#FFFFFF;margin-top:12pt;margin-bottom:0pt;text-indent:5.24%;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The Registrant has entered into indemnification agreements with its directors and executive officers, in addition to the indemnification provided for in the Registrant&#8217;s certificate of incorporation and bylaws, and the Registrant intends to enter into indemnification agreements with any new directors and executive officers in the future.</p>
<p style="Background-color:#FFFFFF;margin-top:12pt;margin-bottom:0pt;text-indent:5.24%;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The Registrant has purchased and intends to maintain insurance on behalf of any person who is or was a director or officer against any loss arising from any claim asserted against him or her incurred by him or her in any such capacity, subject to certain exclusions.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:5.24%;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ITEM 7.&nbsp;&nbsp;EXEMPTION FROM REGISTRATION CLAIMED.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Not applicable.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ITEM 8.&nbsp;&nbsp;EXHIBITS</p>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="11" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:32.64%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Incorporated by Reference</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:7.26%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Exhibit<br />Number</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:35.86%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Description</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:7.8%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;"><br />Form</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:14.1%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">File<br />Number</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:5.86%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Exhibit</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:16.8%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Filing Date</p></td>
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<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4.1</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="http://www.sec.gov/Archives/edgar/data/907654/000119312509064819/dex31.htm"><font style="text-decoration:underline;">Amended and Restated Certificate of Incorporation of the Registrant, as amended</font></a><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">10-K</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">000-22873</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3.1</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3/27/2009</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4.1(a)</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#0000FF;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="http://www.sec.gov/Archives/edgar/data/907654/000119312513090814/d498361dex51.htm"><font style="text-decoration:underline;">Certificate of Amendment to Restated Certificate of Incorporation</font></a><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">8-K</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">000-22873</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">5.1</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3/5/2013</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4.1(b)</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#0000FF;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459015007723/abio-ex31_74.htm"><font style="text-decoration:underline;">Certificate of Amendment to Restated Certificate of Incorporation</font></a><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">8-K</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">000-22873</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3.1</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">9/3/2015</p></td>
</tr></table></div>
<hr style="page-break-after:always;width:100%;">
<div align="left";>
<table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse;  margin-left:0.05%;width:102.79%;">
<tr>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="11" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:32.64%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Incorporated by Reference</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:7.26%; border-bottom:solid 1pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Exhibit<br />Number</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:35.86%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Description</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:7.8%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;"><br />Form</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:14.1%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">File<br />Number</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:5.86%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Exhibit</p></td>
<td valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.5pt;width:16.8%; border-bottom:solid 1pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Filing Date</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4.1(c)</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#0000FF;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459019010715/abio-ex31_7.htm"><font style="text-decoration:underline;">Certificate of Amendment to Restated Certificate of Incorporation</font></a><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">8-K</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">000-22873</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3.1</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4/3/2019</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4.2</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#0000FF;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="http://www.sec.gov/Archives/edgar/data/907654/000119312509235710/dex32.htm"><font style="text-decoration:underline;">Second Amended and Restated Bylaws of the Registrant, as amended</font></a><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">10-Q</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">000-22873</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3.2</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">11/16/2009</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4.3</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#0000FF;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459019017210/abio-ex42_106.htm"><font style="text-decoration:underline;">Form of Common Stock Certificate</font></a><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">10-Q</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">000-22873</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">4.2</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">5/8/2019</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">5.1*</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="abio-ex51_39.htm"><font style="text-decoration:underline;">Opinion of Cooley LLP</font></a><font style="color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">23.1*</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="abio-ex51_39.htm"><font style="text-decoration:underline;">Consent of Cooley LLP (included in Exhibit 5.1).</font></a></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">23.2*</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="abio-ex232_6.htm"><font style="text-decoration:underline;">Consent of KPMG US LLP, independent registered public accounting firm</font></a><font style="color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">24.1*</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="#SIGNATURES_015002"><font style="text-decoration:underline;">Power of Attorney (included on the signature page of this Form S-8).</font></a></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.26%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:10.1pt;;text-indent:-10.1pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">99.1</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.58%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.86%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="http://www.sec.gov/Archives/edgar/data/907654/000156459020056751/abio-ex101_7.htm"><font style="text-decoration:underline;">ARCA biopharma, Inc. 2020 Equity Incentive Plan</font></a><font style="color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">.</font></p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">8-K</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">000-22873</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.86%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">10.1</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">12/10/2020</p></td>
</tr>
<tr>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.54%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:35.74%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:7.8%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:14.1%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:5.84%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:2.44%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td colspan="3" valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:16.82%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
<td style="border:none;padding:0;"></td>
</tr>
</table></div>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><img src="g23gjhpzhlcs000006.jpg" title="" alt="" style="width:39px;height:1px;"></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">* Filed herewith</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ITEM 9.&nbsp;&nbsp;UNDERTAKINGS</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="font-weight:bold;font-style:normal;text-decoration:none;Background-color:#auto;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;">(a)</font></p></td>
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;text-transform:none;font-variant: normal;letter-spacing:0pt;font-family:Times New Roman;font-size:12pt;"><font style="Background-color:#auto;text-decoration:none;"></font><font style="font-weight:normal;color:#000000;"></font><font style="font-size:10pt;font-weight:normal;color:#000000;">The undersigned registrant hereby undertakes:</font></p></td></tr></table></div>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:0%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(1)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:0%;font-size:10pt;">&nbsp;</p>
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;text-transform:none;font-variant: normal;letter-spacing:0pt;font-family:Times New Roman;font-size:12pt;">&nbsp;</p></td>
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="font-weight:bold;font-style:normal;text-decoration:none;Background-color:#auto;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;">(i)</font></p></td>
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;text-transform:none;font-variant: normal;letter-spacing:0pt;font-family:Times New Roman;font-size:12pt;"><font style="Background-color:#auto;text-decoration:none;"></font><font style="font-weight:normal;color:#000000;"></font><font style="font-size:10pt;font-weight:normal;color:#000000;">To include any prospectus required by section 10(a)(3) of the Securities Act;</font></p></td></tr></table></div>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:23.08%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:9.62%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(ii)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the &#8220;Calculation of Registration Fee&#8221; table in the effective registration statement.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:17.31%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-top:0pt;margin-bottom:0pt;margin-left:7.69%;text-indent:9.62%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(iii)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:7.69%;font-style:italic;font-size:10pt;font-family:Times New Roman;font-weight:normal;text-transform:none;font-variant: normal;">Provided, however,<font style="font-style:normal;"> That:</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:7.69%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(A)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">paragraphs (a)(1)(i) and (a)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:15.38%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:7.69%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(B)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered herein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:15.38%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:7.69%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(C)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.</font></p>
<p style="margin-top:0pt;margin-bottom:0pt;margin-left:15.38%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<hr style="page-break-after:always;width:100%;">
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:7.69%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(D)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">That, for the purpose of determining liability of the registrant under the Securities Act to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:15.38%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:15.38%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(i)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-size:5pt;font-weight:normal;color:#000000;"> </font><font style="font-weight:normal;color:#000000;">Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:23.08%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:15.38%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(ii)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-size:5pt;font-weight:normal;color:#000000;"> </font><font style="font-weight:normal;color:#000000;">Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:23.08%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:15.38%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(iii)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:23.08%;text-indent:0%;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-top:0pt;margin-bottom:0pt;margin-left:7.69%;text-indent:15.38%;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="Background-color:#auto;text-decoration:none;">(iv)</font><font style="font-size:12pt;font-weight:normal;margin-left:36pt;color:#000000;"></font><font style="font-weight:normal;color:#000000;">Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:15.38%;font-size:10pt;">&nbsp;</p>
<div align="left">
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="font-weight:bold;font-style:normal;text-decoration:none;Background-color:#auto;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;">(b)</font></p></td>
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;text-transform:none;font-variant: normal;letter-spacing:0pt;font-family:Times New Roman;font-size:12pt;"><font style="Background-color:#auto;text-decoration:none;"></font><font style="font-weight:normal;color:#000000;"></font><font style="font-size:10pt;font-weight:normal;color:#000000;">The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant's annual report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</font></p></td></tr></table></div>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:7.69%;text-indent:-7.69%;font-size:10pt;">&nbsp;</p>
<div align="left">
<table border="0" cellspacing="0" cellpadding="0"  style="border-collapse:collapse; width:100%;">
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;"><font style="font-weight:bold;font-style:normal;text-decoration:none;Background-color:#auto;color:#auto;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;letter-spacing:0pt;">(c)</font></p></td>
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<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;font-weight:bold;font-style:normal;color:#auto;text-transform:none;font-variant: normal;letter-spacing:0pt;font-family:Times New Roman;font-size:12pt;"><font style="Background-color:#auto;text-decoration:none;"></font><font style="font-weight:normal;color:#000000;"></font><font style="font-size:5pt;font-weight:normal;color:#000000;"> </font><font style="font-size:10pt;font-weight:normal;color:#000000;">Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.</font></p></td></tr></table></div>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><br /></p>
<hr style="page-break-after:always;width:100%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;"><a name="SIGNATURES_015002"></a><a name="SIGNATURES_015002"></a>SIGNATURES</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Westminster, State of Colorado, on December 17, 2020.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ARCA biopharma, Inc.</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">By: </p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/&#160;Michael R. Bristow</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top"  style="padding-left:0.25pt;padding-Right:0.25pt;padding-Top:0.25pt;padding-Bottom:0.25pt;width:45%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Michael R. Bristow</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-style:italic;color:#000000;font-size:10pt;font-family:Times New Roman;font-weight:normal;text-transform:none;font-variant: normal;">President and Chief Executive Officer</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">POWER OF ATTORNEY</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">KNOW ALL PERSONS BY THESE PRESENTS<font style="font-weight:normal;">, that each person whose signature appears below constitutes and appoints Michael R. Bristow, Brian L. Selby and Christopher D. Ozeroff, and each or any one of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his or her substitutes or substitute, may lawfully do or cause to be done by virtue hereof.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:7.69%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<div align="left">
<table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse; width:105.76%;">
<tr>
<td valign="bottom"  style="width:32.78%; border-bottom:solid 0.75pt #000000;white-space:nowrap;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Signature</p></td>
<td valign="bottom"  style="width:1.14%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</p></td>
<td valign="bottom"  style="padding-left:0.7pt;padding-Right:0.7pt;padding-Top:0pt;padding-Bottom:0pt;width:45.64%; border-bottom:solid 0.75pt #000000;white-space:nowrap;">
<p style="text-align:center;margin-bottom:1pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Title</p></td>
<td valign="bottom"  style="width:0.78%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td colspan="2" valign="bottom"  style="padding-left:0.7pt;padding-Right:0.7pt;padding-Top:0pt;padding-Bottom:0pt;width:19.68%; border-bottom:solid 0.75pt #000000;white-space:nowrap;">
<p style="text-align:center;margin-bottom:1pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Date</p></td>
</tr>
<tr>
<td valign="bottom"  style="width:32.78%; border-top:solid 0.75pt #000000; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/&#160;Michael R. Bristow</p></td>
<td valign="bottom"  style="width:1.14%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:45.64%; border-top:solid 0.75pt #000000; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">President and Chief Executive</p></td>
<td valign="bottom"  style="width:0.78%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="width:19.68%; border-top:solid 0.75pt #000000; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">December 17, 2020</p></td>
</tr>
<tr>
<td valign="top"  style="width:32.78%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Michael R. Bristow</p></td>
<td valign="bottom"  style="width:1.14%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</p></td>
<td valign="top"  style="width:45.64%;">
<p style="margin-bottom:1pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Officer and Director<br /> (Principal Executive Officer)</p></td>
<td valign="bottom"  style="width:0.78%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td colspan="2" valign="top"  style="width:19.68%; border-top:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td valign="bottom"  style="width:32.78%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/&#160;Brian L. Selby</p></td>
<td valign="bottom"  style="width:1.14%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:45.64%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Vice President, Finance </p></td>
<td valign="bottom"  style="width:0.78%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="width:19.68%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">December 17, 2020</p></td>
</tr>
<tr>
<td valign="top"  style="width:32.78%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Brian L. Selby</p></td>
<td valign="bottom"  style="width:1.14%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</p></td>
<td valign="top"  style="width:45.64%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Principal Financial Officer and Principal Accounting Officer)</p></td>
<td valign="bottom"  style="width:0.78%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td colspan="2" valign="top"  style="width:19.68%; border-top:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td valign="bottom"  style="width:32.78%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/&#160;Linda Grais</p></td>
<td valign="bottom"  style="width:1.14%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:45.64%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
<td valign="bottom"  style="width:0.78%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="width:19.68%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">December 17, 2020</p></td>
</tr>
<tr>
<td valign="top"  style="width:32.78%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Linda Grais</p></td>
<td valign="bottom"  style="width:1.14%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</p></td>
<td valign="top"  style="width:45.64%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:0.78%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td colspan="2" valign="top"  style="width:19.68%; border-top:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td valign="bottom"  style="width:32.78%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/&#160;Raymond Woosley</p></td>
<td valign="bottom"  style="width:1.14%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:45.64%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
<td valign="bottom"  style="width:0.78%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="width:19.68%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">December 17, 2020</p></td>
</tr>
<tr>
<td valign="top"  style="width:32.78%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Raymond Woosley</p></td>
<td valign="bottom"  style="width:1.14%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</p></td>
<td valign="top"  style="width:45.64%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:0.78%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td colspan="2" valign="top"  style="width:19.68%; border-top:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
</tr>
<tr>
<td valign="bottom"  style="width:32.78%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/&#160;Robert Conway</p></td>
<td valign="bottom"  style="width:1.14%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:45.64%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
<td valign="bottom"  style="width:0.78%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="width:19.68%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">December 17, 2020</p></td>
</tr>
<tr>
<td valign="top"  style="width:32.78%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Robert Conway</p></td>
<td valign="bottom"  style="width:1.14%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</p></td>
<td valign="top"  style="width:45.64%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:0.78%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="top"  style="width:16.96%; border-top:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td style="border:none;padding:0;"></td>
</tr>
<tr>
<td valign="bottom"  style="width:32.78%; border-bottom:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/&#160;Daniel Mitchell</p></td>
<td valign="bottom"  style="width:1.14%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:45.64%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
<td valign="bottom"  style="width:0.78%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="width:19.68%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"> December 17, 2020</p></td>
</tr>
<tr>
<td valign="top"  style="width:32.78%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Daniel Mitchell</p></td>
<td valign="bottom"  style="width:1.14%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</p></td>
<td valign="top"  style="width:45.64%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="bottom"  style="width:0.78%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="top"  style="width:16.96%; border-top:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/&#160;Anders Hove</p></td>
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abio-s8.htm
As filed with the U.S. Securities and Exchange Commission on December 17, 2020
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
ARCA biopharma, Inc.
(Exact name of registrant as specified in its charter)
Delaware
36-3855489
(State or other jurisdiction of Incorporation or organization)
(I.R.S. Employer Identification No.)
10170 Church Ranch Way, Suite 100
Westminster, CO 80021
(Address of principal executive offices) (Zip code)
ARCA biopharma, Inc. 2020 Equity Incentive Plan
(Full title of the plan)
Michael R. Bristow
President and Chief Executive Officer
ARCA biopharma, Inc.
10170 Church Ranch Way, Suite 100
Westminster, CO 80021
(720) 940-2200
(Name and address of agent for service) (Telephone number, including area code, of agent for service)
Copies to:
Brent D. Fassett
COOLEY LLP
380 Interlocken Crescent, Suite 900
Broomfield, CO 80021
(720) 566-4000
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.
Large accelerated filer
o
Accelerated filer
o
Non-accelerated filer
x
Smaller reporting company
x
Emerging growth company
o
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.
o
CALCULATION OF REGISTRATION FEE
Title of Securities
to be Registered
Amount to be
Registered(1)
Proposed
Maximum
Offering
Price per
Share
Proposed
Maximum
Aggregate
Offering Price
Amount of
Registration Fee
Common Stock, par value $0.001 per share
— Shares reserved for future grant under the 2020 Equity Incentive Plan
1,167,425
(2)
$
4.12
(3)
$
4,809,791.00
$
524.75
Total
1,167,425
N/A
$
4,809,791.00
$
524.75
(1)
Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the "
Securities Act
"), this Registration Statement shall also cover any additional shares of Registrant's common stock, par value $0.001 per share (the "
Common Stock
"), that become issuable under the Registrant's 2020 Equity Incentive Plan (the "
2020 Plan
") by reason of any stock dividend, stock split, recapitalization or other similar transaction that results in an increase in the number of outstanding shares of Common Stock.
(
2
)
Pursuant to the terms of the 2020 Plan, any shares subject to outstanding awards originally granted under the Registrant's Amended and Restated 2013 Equity Incentive Plan (the "
2013 Plan
") that would have returned to the 2013 Plan due to expiration, termination, forfeiture or repurchase, or due to being settled in cash instead of stock, shall become available for future issuance pursuant to the 2020 Plan.
(
3
)
Estimated in accordance with Rule 457(h) and Rule 457(c) promulgated under the Securities Act solely for the purpose of calculating the registration fee. The offering price per share and the aggregate offering price are based upon the average high and low prices of the Common Stock as reported on The Nasdaq Capital Market on December 16, 2020.
PART II
ITEM 3.  INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE.
The following documents filed by ARCA biopharma, Inc. (the "
Registrant
") with the Securities and Exchange Commission (the "
Commission
") are incorporated by reference into this Registration Statement:
(a)
The Registrant's Annual Report on Form 10-K
(File No. 000-22873)
for the fiscal year ended December 31, 2019 filed on
February
18, 2020
pursuant to Sections 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the "
Exchange Act
").
(b)
The Registrant's Quarterly Reports on Form 10-Q
(File No. 000-22873)
for the fiscal quarters ended March 31, 2020, June 30, 2020 and September 30, 2020 filed on
May 6, 2020
,
August 5, 2020
and
November 2, 2020
, respectively, pursuant to Sections 13(a) or 15(d) of the Exchange Act.
(c)
The Registrant's Current Reports on Form 8-K
(File No. 000-22873) (other than Current Reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits furnished on such form that relate to such items) filed on
February 18, 2020
,
March 4, 2020
,
May 28, 2020
,
June 1, 2020
,
June 3, 2020
,
July 2, 2020
,
July 14, 2020
,
July 22, 2020
,
August 12, 2020
,
August 31, 2020
,
September 21, 2020
,
October 7, 2020
,
November 23, 2020
,
December 10, 2020
and
December 15, 2020
pursuant to Sections 13(a) or 15(d) of the Exchange Act.
(d)
All other reports and documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (other than Current Reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits furnished on such form that relate to such items) on or after the date of this Registration Statement and prior to the filing of a post-effective amendment to this Registration Statement which indicates that all securities offered have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference herein and to be a part of this Registration Statement from the date of the filing of such reports and documents. Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any subsequently filed document that also is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.
(e)
The description of the Registrant's common stock contained in the Registrant's Registration Statement on Form 8-A filed on
July 23, 1997
(File No. 000-22873) under the Exchange Act, including any amendment or report filed for the purpose of updating such description.
ITEM 4.  DESCRIPTION OF SECURITIES.
Not applicable.
ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.
Not applicable.
ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.
Subsection (a) of Section 145 of the Delaware General Corporation Law (the "
DGCL
") empowers a corporation to indemnify any person who was or is a party or who is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person's conduct was unlawful.
Subsection (b) of Section 145 of the DGCL empowers a corporation to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person acted in any of the capacities set forth above, against expenses (including attorneys' fees) actually and reasonably incurred by the person in
connection with the defense or settlement of such action or suit if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or such other court shall deem proper.
Section 145 of the DGCL further provides that to the extent a director or officer of a corporation has been successful on the merits or otherwise in the defense of any action, suit or proceeding referred to in subsections (a) and (b) of Section 145, or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys' fees) actually and reasonably incurred by such person in connection therewith; that indemnification provided for by Section 145 shall not be deemed exclusive of any other rights to which the indemnified party may be entitled; and the indemnification provided for by Section 145 shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of such person's heirs, executors and administrators. Section 145 also empowers the corporation to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against such person and incurred by such person in any such capacity, or arising out of his status as such, whether or not the corporation would have the power to indemnify such person against such liabilities under Section 145.
Section 102(b)(7) of the DGCL provides that a corporation's certificate of incorporation may contain a provision eliminating or limiting the personal liability of a director to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, provided that such provision shall not eliminate or limit the liability of a director (i) for any breach of the director's duty of loyalty to the corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the DGCL, or (iv) for any transaction from which the director derived an improper personal benefit.
The Registrant's certificate of incorporation contains provisions that eliminate, to the maximum extent permitted by the DGCL, the personal liability of directors and executive officers for monetary damages for breach of their fiduciary duties as a director or officer. The Registrant's certificate of incorporation and bylaws provide that the Registrant shall indemnify its directors and executive officers and may indemnify its employees and other agents to the fullest extent permitted by the DGCL.
The Registrant has entered into indemnification agreements with its directors and executive officers, in addition to the indemnification provided for in the Registrant's certificate of incorporation and bylaws, and the Registrant intends to enter into indemnification agreements with any new directors and executive officers in the future.
The Registrant has purchased and intends to maintain insurance on behalf of any person who is or was a director or officer against any loss arising from any claim asserted against him or her incurred by him or her in any such capacity, subject to certain exclusions.
ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.
Not applicable.
ITEM 8.  EXHIBITS
Incorporated by Reference
Exhibit
Number
Description
Form
File
Number
Exhibit
Filing Date
4.1
Amended and Restated Certificate of Incorporation of the Registrant, as amended
.
10-K
000-22873
3.1
3/27/2009
4.1(a)
Certificate of Amendment to Restated Certificate of Incorporation
.
8-K
000-22873
5.1
3/5/2013
4.1(b)
Certificate of Amendment to Restated Certificate of Incorporation
.
8-K
000-22873
3.1
9/3/2015
Incorporated by Reference
Exhibit
Number
Description
Form
File
Number
Exhibit
Filing Date
4.1(c)
Certificate of Amendment to Restated Certificate of Incorporation
.
8-K
000-22873
3.1
4/3/2019
4.2
Second Amended and Restated Bylaws of the Registrant, as amended
.
10-Q
000-22873
3.2
11/16/2009
4.3
Form of Common Stock Certificate
.
10-Q
000-22873
4.2
5/8/2019
5.1*
Opinion of Cooley LLP
.
23.1*
Consent of Cooley LLP (included in Exhibit 5.1).
23.2*
Consent of KPMG US LLP, independent registered public accounting firm
.
24.1*
Power of Attorney (included on the signature page of this Form S-8).
99.1
ARCA biopharma, Inc. 2020 Equity Incentive Plan
.
8-K
000-22873
10.1
12/10/2020
* Filed herewith
ITEM 9.  UNDERTAKINGS
(a)
The undersigned registrant hereby undertakes:
(1)
To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:
(i)
To include any prospectus required by section 10(a)(3) of the Securities Act;
(ii)
To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement.
(iii)
To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;
Provided, however,
That:
(A)
paragraphs (a)(1)(i) and (a)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement.
(B)
That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered herein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
(C)
To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.
(D)
That, for the purpose of determining liability of the registrant under the Securities Act to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:
(i)
Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;
(ii)
Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;
(iii)
The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and
(iv)
Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.
(b)
The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant's annual report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
(c)
Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Westminster, State of Colorado, on December 17, 2020.
ARCA biopharma, Inc.
By:
/s/ Michael R. Bristow
Michael R. Bristow
President and Chief Executive Officer
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS
, that each person whose signature appears below constitutes and appoints Michael R. Bristow, Brian L. Selby and Christopher D. Ozeroff, and each or any one of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his or her substitutes or substitute, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.
Signature
Title
Date
/s/ Michael R. Bristow
President and Chief Executive
December 17, 2020
Michael R. Bristow
Officer and Director
(Principal Executive Officer)
/s/ Brian L. Selby
Vice President, Finance
December 17, 2020
Brian L. Selby
(Principal Financial Officer and Principal Accounting Officer)
/s/ Linda Grais
Director
December 17, 2020
Linda Grais
/s/ Raymond Woosley
Director
December 17, 2020
Raymond Woosley
/s/ Robert Conway
Director
December 17, 2020
Robert Conway
/s/ Daniel Mitchell
Director
December 17, 2020
Daniel Mitchell
/s/ Anders Hove
Director
December 17, 2020
Anders Hove