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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED STATES</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">&#160;SECURITIES AND EXCHANGE COMMISSION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WASHINGTON, D.C. 20549</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM 8-K</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT REPORT</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Pursuant to Section 13 or 15(d)</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">of the Securities Exchange Act of 1934</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of Report (Date of earliest event reported):<b> April 25, 2013</b></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">ANACOR PHARMACEUTICALS, INC.</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of registrant as specified in its charter)</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">001-34973</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">25-1854385</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State of incorporation)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission File No.)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(IRS Employer Identification No.)</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">1020 East Meadow Circle</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Palo Alto, CA 94303-4230</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of principal executive offices and zip code)</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Registrant&#146;s telephone number, including area code:<b> (650) 543-7500</b></font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):</font></p>
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<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</font></p>
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<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></p>
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<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</font></p>
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<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">ITEM 8.01&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; &#160;OTHER EVENTS.</font></b></p>
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<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On April 25, 2013, Anacor Pharmaceuticals, Inc. (&#147;Anacor&#148;) entered into an underwriting agreement (the &#147;Underwriting Agreement&#148;) with Cowen and Company, LLC, as representative (the &#147;Representative&#148;) of the several underwriters named therein (the &#147;Underwriters&#148;), relating to the public offering and sale (the &#147;Offering&#148;) of up to 3,599,373 shares of Anacor&#146;s common stock, par value $0.001 per share (&#147;Common Stock&#148;), including 469,483 shares issuable to the Underwriters pursuant to a 30-day overallotment option. The price to the public in this Offering is $6.39 per share, and the Underwriters have agreed to purchase the shares from Anacor pursuant to the Underwriting Agreement at a price of $6.0066 per share. The net proceeds to Anacor from this Offering are expected to be approximately $18.5 million, after deducting the underwriting discount and other estimated offering expenses payable by Anacor, assuming no exercise by the Underwriters of the overallotment option. The Offering is expected to close on May 1, 2013, subject to customary closing conditions. &#160;Anacor currently intends to use the net proceeds from this Offering to fund its research and development activities, including clinical trials for its development programs and preclinical activities for its product candidates, to increase its working capital and to provide funds for general corporate purposes.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This Offering is being made pursuant to Anacor&#146;s effective shelf registration statement on Form S-3 (Registration No. 333-185486), including the prospectus dated December 21, 2012 contained therein, as the same has been supplemented.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The Underwriting Agreement contains customary representations, warranties and covenants by Anacor, customary conditions to closing, indemnification obligations of Anacor and the Underwriters, including for liabilities under the Securities Act of 1933, as amended, other obligations of the parties and termination provisions. The representations, warranties and covenants contained in the Underwriting Agreement were made only for purposes of such agreement, were solely for the benefit of the parties to such agreement, and may be subject to limitations agreed upon by the contracting parties.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Anacor and all of its directors and executive officers also agreed not to sell or transfer any Common Stock or securities convertible into or exchangeable for shares of Common Stock held by them or to engage in any short selling, in each case for 30 days after April 26, 2013 without first obtaining the written consent of the Representative, subject to certain exceptions.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The Underwriting Agreement is filed as Exhibit 1.1 to this report and is incorporated by reference herein. The foregoing description of the terms of the Underwriting Agreement does not purport to be complete and is qualified in its entirety by reference to such exhibit. A copy of the opinion of Cooley LLP relating to the legality of the issuance and sale of the shares in the Offering is attached as Exhibit 5.1 hereto.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On April 26, 2013, Anacor issued a press release announcing the pricing of the Offering. &#160;A copy of this press release is attached as Exhibit 99.1 and is incorporated herein by reference.</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Forward-Looking Statements</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:27.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This report contains forward-looking statements that are subject to a number of risks and uncertainties, including statements about Anacor&#146;s issuance of securities, the amount of proceeds from the Offering, the closing of the Offering and Anacor&#146;s expectations regarding its anticipated use of proceeds from the Offering. Such forward-looking statements involve known and unknown risks, uncertainties and other factors, which may cause actual results to be materially different from any results expressed or implied by such forward-looking statements. For example, there are risks associated with the Underwriter fulfilling its obligations to purchase the securities and Anacor&#146;s ability to satisfy its conditions to close the Offering. These and other risks and uncertainties are described more fully under the headings &#147;Risk Factors&#148; in Anacor&#146;s prospectus supplement related to this Offering. All forward-looking statements are qualified in their entirety by this cautionary statement. Anacor is providing this information as of this date and does not undertake any obligation to update any forward-looking statements contained in this report as a result of new information, future events or otherwise.</font></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">ITEM 9.01&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; &#160;FINANCIAL STATEMENTS AND EXHIBITS.</font></b></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(d)</font></b><font size="2" style="font-size:10.0pt;">&#160;&#160;&#160; <b>&#160;Exhibits.</b></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Underwriting   Agreement, dated as of April 25, 2013, by and between Anacor and the Representative</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Opinion   of Cooley LLP</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent   of Cooley LLP (contained in Exhibit 5.1)</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press   Release titled &#147;Anacor Pharmaceuticals Prices $20 Million Public Offering of   Common Stock,&#148; dated April 26, 2013</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>
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<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date:   April 26, 2013</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">ANACOR   PHARMACEUTICALS, INC.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/   Geoffrey M. Parker</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Geoffrey   M. Parker</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Senior   Vice President, Chief Financial Officer</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3<a name="PB_3_121806_5335"></a></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">INDEX TO EXHIBITS</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Underwriting   Agreement, dated as of April 25, 2013, by and between Anacor and the   Representative</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.42%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Opinion   of Cooley LLP</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent   of Cooley LLP (contained in Exhibit 5.1)</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press   Release titled &#147;Anacor Pharmaceuticals Prices $20 Million Public Offering of   Common Stock,&#148; dated April 26, 2013</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4<a name="PB_4_121820_5796"></a></font></p>
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported):
April 25, 2013
ANACOR PHARMACEUTICALS, INC.
(Exact name of registrant as specified in its charter)
DELAWARE
001-34973
25-1854385
(State of incorporation)
(Commission File No.)
(IRS Employer Identification No.)
1020 East Meadow Circle
Palo Alto, CA 94303-4230
(Address of principal executive offices and zip code)
Registrant's telephone number, including area code:
(650) 543-7500
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):
o
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
ITEM 8.01             OTHER EVENTS.
On April 25, 2013, Anacor Pharmaceuticals, Inc. ("Anacor") entered into an underwriting agreement (the "Underwriting Agreement") with Cowen and Company, LLC, as representative (the "Representative") of the several underwriters named therein (the "Underwriters"), relating to the public offering and sale (the "Offering") of up to 3,599,373 shares of Anacor's common stock, par value $0.001 per share ("Common Stock"), including 469,483 shares issuable to the Underwriters pursuant to a 30-day overallotment option. The price to the public in this Offering is $6.39 per share, and the Underwriters have agreed to purchase the shares from Anacor pursuant to the Underwriting Agreement at a price of $6.0066 per share. The net proceeds to Anacor from this Offering are expected to be approximately $18.5 million, after deducting the underwriting discount and other estimated offering expenses payable by Anacor, assuming no exercise by the Underwriters of the overallotment option. The Offering is expected to close on May 1, 2013, subject to customary closing conditions.  Anacor currently intends to use the net proceeds from this Offering to fund its research and development activities, including clinical trials for its development programs and preclinical activities for its product candidates, to increase its working capital and to provide funds for general corporate purposes.
This Offering is being made pursuant to Anacor's effective shelf registration statement on Form S-3 (Registration No. 333-185486), including the prospectus dated December 21, 2012 contained therein, as the same has been supplemented.
The Underwriting Agreement contains customary representations, warranties and covenants by Anacor, customary conditions to closing, indemnification obligations of Anacor and the Underwriters, including for liabilities under the Securities Act of 1933, as amended, other obligations of the parties and termination provisions. The representations, warranties and covenants contained in the Underwriting Agreement were made only for purposes of such agreement, were solely for the benefit of the parties to such agreement, and may be subject to limitations agreed upon by the contracting parties.
Anacor and all of its directors and executive officers also agreed not to sell or transfer any Common Stock or securities convertible into or exchangeable for shares of Common Stock held by them or to engage in any short selling, in each case for 30 days after April 26, 2013 without first obtaining the written consent of the Representative, subject to certain exceptions.
The Underwriting Agreement is filed as Exhibit 1.1 to this report and is incorporated by reference herein. The foregoing description of the terms of the Underwriting Agreement does not purport to be complete and is qualified in its entirety by reference to such exhibit. A copy of the opinion of Cooley LLP relating to the legality of the issuance and sale of the shares in the Offering is attached as Exhibit 5.1 hereto.
On April 26, 2013, Anacor issued a press release announcing the pricing of the Offering.  A copy of this press release is attached as Exhibit 99.1 and is incorporated herein by reference.
Forward-Looking Statements
This report contains forward-looking statements that are subject to a number of risks and uncertainties, including statements about Anacor's issuance of securities, the amount of proceeds from the Offering, the closing of the Offering and Anacor's expectations regarding its anticipated use of proceeds from the Offering. Such forward-looking statements involve known and unknown risks, uncertainties and other factors, which may cause actual results to be materially different from any results expressed or implied by such forward-looking statements. For example, there are risks associated with the Underwriter fulfilling its obligations to purchase the securities and Anacor's ability to satisfy its conditions to close the Offering. These and other risks and uncertainties are described more fully under the headings "Risk Factors" in Anacor's prospectus supplement related to this Offering. All forward-looking statements are qualified in their entirety by this cautionary statement. Anacor is providing this information as of this date and does not undertake any obligation to update any forward-looking statements contained in this report as a result of new information, future events or otherwise.
ITEM 9.01             FINANCIAL STATEMENTS AND EXHIBITS.
(d)
Exhibits.
Exhibit Number
Description
1.1
Underwriting   Agreement, dated as of April 25, 2013, by and between Anacor and the Representative
5.1
Opinion   of Cooley LLP
23.1
Consent   of Cooley LLP (contained in Exhibit 5.1)
99.1
Press   Release titled "Anacor Pharmaceuticals Prices $20 Million Public Offering of   Common Stock," dated April 26, 2013
2
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
Date:   April 26, 2013
ANACOR   PHARMACEUTICALS, INC.
By:
/s/   Geoffrey M. Parker
Geoffrey   M. Parker
Senior   Vice President, Chief Financial Officer
3
INDEX TO EXHIBITS
Exhibit
Description
1.1
Underwriting   Agreement, dated as of April 25, 2013, by and between Anacor and the   Representative
5.1
Opinion   of Cooley LLP
23.1
Consent   of Cooley LLP (contained in Exhibit 5.1)
99.1
Press   Release titled "Anacor Pharmaceuticals Prices $20 Million Public Offering of   Common Stock," dated April 26, 2013
4