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<div><a name="s874559D9DE4431A926C0A26C288E569E"></a></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;text-align:center;-sec-extract:summary;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">As filed with the Securities and Exchange Commission on May 20, 2019</font></div><div style="line-height:120%;text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Registration No. 333-</font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">UNITED STATES</font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Washington, D.C. 20549</font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">FORM S-8</font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">REGISTRATION STATEMENT</font></div><div style="line-height:120%;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-style:italic;font-weight:bold;">UNDER</font></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-style:italic;font-weight:bold;">THE SECURITIES ACT OF 1933</font></div><div style="line-height:120%;text-align:center;"><img src="proslogoa14.jpg" alt="proslogoa14.jpg" style="height:74px;width:253px;"></div><div style="line-height:120%;text-align:center;font-size:22pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:99.27310488058151%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:50%;"></td><td style="width:50%;"></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:22pt;"><font style="font-family:inherit;font-size:22pt;font-weight:bold;">PROS HOLDINGS, INC.</font></div></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">(Exact name of registrant as specified in its charter)</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">Delaware</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">76-0168604</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">(State or other jurisdiction of <br>incorporation or organization)</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">(I.R.S. Employer Identification No.)</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">3100 MAIN STREET, SUITE 900</font></div><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">HOUSTON, TEXAS</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">77002</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">(Address of Principal Executive Offices)</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">(Zip Code)</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">PROS HOLDINGS, INC. 2017 EQUITY INCENTIVE PLAN</font></div></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">(Full title of the plan)</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">ANDRES REINER</font></div><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">CHIEF EXECUTIVE OFFICER AND PRESIDENT</font></div><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">PROS HOLDINGS, INC.</font></div><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">3100 MAIN STREET, SUITE 900</font></div><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">HOUSTON, TEXAS 77002</font></div></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">(Name and address of agent for service)</font></div></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">(713) 335-5151</font></div></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">(Telephone number, including area code, of agent for service)</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:16px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer&#8221; and &#8220;smaller reporting company&#8221; in Rule 12b-2 of the Exchange Act.: (Check one)</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:99.06542056074767%;border-collapse:collapse;text-align:left;"><tr><td colspan="4"></td></tr><tr><td style="width:25%;"></td><td style="width:20%;"></td><td style="width:26%;"></td><td style="width:29%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Large accelerated filer </font><font style="font-family:Wingdings;font-size:10pt;">x</font></div><div style="font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;"><br></font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Accelerated filer  </font><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Non-accelerated filer  </font><font style="font-family:Wingdings;font-size:10pt;">&#168;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;<br></font><font style="font-family:inherit;font-size:8pt;">(Do not check if a smaller reporting company)</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Smaller reporting company </font><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr></table></div></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">CALCULATION OF REGISTRATION FEE</font></div><div style="line-height:120%;text-align:center;font-size:11pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:97.19626168224299%;border-collapse:collapse;text-align:left;"><tr><td colspan="9"></td></tr><tr><td style="width:30%;"></td><td style="width:1%;"></td><td style="width:12%;"></td><td style="width:1%;"></td><td style="width:19%;"></td><td style="width:1%;"></td><td style="width:20%;"></td><td style="width:1%;"></td><td style="width:15%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">Title of securities to be registered</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">Amount to be registered</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">Proposed maximum <br>offering price <br>per share (1)</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">Proposed maximum <br>aggregate offering <br>price (1)</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">Amount of <br>registration fee</font></div></td></tr><tr><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">Common Stock, <br>$0.001 par value</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:9px;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">2017 Equity Incentive Plan</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">2,050,000</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">$51.51</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">$105,595,500</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">$12,798.17</font></div></td></tr><tr><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">TOTAL</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">2,050,000</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">$51.51</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">$105,595,500</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">$12,798.17</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:16px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(1)&#160;&#160;&#160;&#160;Calculated solely for purposes of this offering under Rule 457(c) and (h) of the Securities Act on the basis of the average of the high and low selling price per share of Registrant&#8217;s Common Stock as reported by the New York Stock Exchange on May 13, 2019.  </font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><a name="s928FDAAF6E08F62F1224A26C29538BB1"></a></div><div style="line-height:120%;text-align:center;-sec-extract:summary;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">EXPLANATORY NOTE</font></div><div style="line-height:120%;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">This Registration Statement is filed by PROS Holdings (&#8220;</font><font style="font-family:inherit;font-size:11pt;font-style:italic;">Registrant</font><font style="font-family:inherit;font-size:11pt;">&#8221;) to register additional securities issuable pursuant to the 2017 Stock Option and Incentive Plan, as amended and restated (the &#8220;</font><font style="font-family:inherit;font-size:11pt;font-style:italic;">Plan</font><font style="font-family:inherit;font-size:11pt;">&#8221;), and consists of only those items required by General Instruction&#160;E to Form&#160;S-8. This Registration Statement on Form&#160;S-8 registers 2,050,000 additional shares of common stock, par value $0.001 per share (the &#8220;</font><font style="font-family:inherit;font-size:11pt;font-style:italic;">Common Stock</font><font style="font-family:inherit;font-size:11pt;">&#8221;), of the Registrant reserved for issuance under the Plan, which shares are in addition to 2,500,000 shares of Common Stock previously registered pursuant to Registration Statement on Form&#160;S-8 filed with the Commission on July 7, 2017. The contents of the Registration Statement on Form&#160;S-8 filed with the Commission on July 7, 2017 are hereby incorporated by reference pursuant to General Instruction&#160;E to Form&#160;S-8. The additional 2,050,000 shares being registered pursuant to this Registration Statement were approved at the Annual Meeting of Stockholders of the Registrant held on May 7, 2019. After giving effect to this Registration Statement, an aggregate of 4,550,000 shares of Common Stock have been registered for issuance pursuant to the Plan.</font></div><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">PART I</font></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Information Required in the Section 10(a) Prospectus</font></div><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">The documents containing the information specified in this Part I of Form S-8&#160;will be sent or given to participants as specified by Rule 428(b)(1). 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style="line-height:120%;padding-bottom:8px;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">Item 8.&#160;&#160;&#160;&#160;Exhibits</font></div><div style="line-height:120%;text-align:center;font-size:11pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:91.40625%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:9%;"></td><td style="width:2%;"></td><td style="width:89%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">Number</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">Exhibit</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">4.1</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1392972/000104746907005018/a2178451zex-3_11.htm"><font style="font-family:inherit;font-size:11pt;">Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1.1 of the Registrant&#8217;s Form S-1 Registration Statement (Registration No. 333-141884), declared effective by the Securities and Exchange Commission on June 27, 2007, as amended).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">4.2</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1392972/000139297213000037/exhibit31amendedandrestate.htm"><font style="font-family:inherit;font-size:11pt;">Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 of the Registrant&#8217;s Form 8-K filed with the Securities and Exchange Commission on August 21, 2013).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font 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style="font-family:inherit;font-size:11pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">4.4</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1392972/000110465907049138/a07-16986_18a12b.htm"><font style="font-family:inherit;font-size:11pt;">Registration Statement No. 001-33554 on Form 8-A filed with the Securities and Exchange Commission on June 21, 2007, 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Statement filed with the Securities and Exchange Commission on March 25, 2019).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">5.1*</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex51_dlaopinionmay2019tos-8.htm"><font style="font-family:inherit;font-size:11pt;">Opinion and Consent of DLA Piper LLP (US).</font></a></div></td></tr><tr><td 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style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">23.2*</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex51_dlaopinionmay2019tos-8.htm"><font style="font-family:inherit;font-size:11pt;">Consent of DLA Piper LLP (US) is contained in Exhibit 5.1.</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">24.1*</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex241directorpoafors-8fili.htm"><font style="font-family:inherit;font-size:11pt;">Power of Attorney.</font></a></div></td></tr></table></div></div><div style="line-height:120%;padding-bottom:16px;padding-top:16px;text-align:left;padding-left:48px;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">* Filed herewith</font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">SIGNATURES</font></div><div style="line-height:120%;padding-bottom:16px;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">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 Houston, State of Texas on this 20th day of May, 2019.</font></div><div style="line-height:120%;padding-bottom:16px;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:11pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:50.390625%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:21%;"></td><td style="width:79%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:32px;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">PROS HOLDINGS, INC.</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">By:</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">/s/ Damian W. Olthoff</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">Damian W. Olthoff</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">General Counsel </font></div></td></tr></table></div></div><div style="line-height:120%;padding-bottom:16px;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;padding-bottom:16px;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;padding-bottom:32px;text-align:left;padding-left:312px;text-indent:-24px;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">EXHIBIT INDEX</font></div><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;text-align:center;font-size:11pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:91.2109375%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:9%;"></td><td style="width:2%;"></td><td style="width:89%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Number</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">4.1</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1392972/000104746907005018/a2178451zex-3_11.htm"><font style="font-family:inherit;font-size:11pt;">Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1.1 of the Registrant&#8217;s Form S-1 Registration Statement (Registration No. 333-141884), declared effective by the Securities and Exchange Commission on June 27, 2007, as amended).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">4.2</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1392972/000139297213000037/exhibit31amendedandrestate.htm"><font style="font-family:inherit;font-size:11pt;">Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 of the Registrant&#8217;s Form 8-K filed with the Securities and Exchange Commission on August 21, 2013).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">4.3</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1392972/000104746907004877/a2178311zex-4_1.htm"><font style="font-family:inherit;font-size:11pt;">Specimen certificate for shares of common stock (incorporated by reference to Exhibit 4.1 of the Registrant&#8217;s Form S-1 Registration Statement (Registration No. 333-141884), declared effective by the Securities and Exchange Commission on June 27, 2007, as amended).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">4.4</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1392972/000110465907049138/a07-16986_18a12b.htm"><font style="font-family:inherit;font-size:11pt;">Registration Statement No. 001-33554 on Form 8-A filed with the Securities and Exchange Commission on June 21, 2007, incorporated herein by reference pursuant to Item 3(c).</font></a></div><div style="text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">4.5</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1392972/000139297219000079/def14aproxydocument2019.htm"><font style="font-family:inherit;font-size:11pt;">Amended and Restated 2017 Equity Incentive Plan (filed as Appendix A to the Registrant's Proxy Statement filed with the Securities and Exchange Commission on March 25, 2019).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">5.1*</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex51_dlaopinionmay2019tos-8.htm"><font style="font-family:inherit;font-size:11pt;">Opinion and consent of DLA Piper LLP (US).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">23.1*</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex231_pwcconsenttomay2019s.htm"><font style="font-family:inherit;font-size:11pt;">Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm.</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">23.2*</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex51_dlaopinionmay2019tos-8.htm"><font style="font-family:inherit;font-size:11pt;">Consent of DLA Piper LLP (US) is contained in Exhibit 5.1.</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">24.1*</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:11pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex241directorpoafors-8fili.htm"><font style="font-family:inherit;font-size:11pt;">Power of Attorney.</font></a></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;text-align:left;padding-left:96px;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">* Filed herewith</font></div><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div>	</body>
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Document
As filed with the Securities and Exchange Commission on May 20, 2019
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
PROS HOLDINGS, INC.
(Exact name of registrant as specified in its charter)
Delaware
76-0168604
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer Identification No.)
3100 MAIN STREET, SUITE 900
HOUSTON, TEXAS
77002
(Address of Principal Executive Offices)
(Zip Code)
PROS HOLDINGS, INC. 2017 EQUITY INCENTIVE PLAN
(Full title of the plan)
ANDRES REINER
CHIEF EXECUTIVE OFFICER AND PRESIDENT
PROS HOLDINGS, INC.
3100 MAIN STREET, SUITE 900
HOUSTON, TEXAS 77002
(Name and address of agent for service)
(713) 335-5151
(Telephone number, including area code, of agent for service)
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.: (Check one)
Large accelerated filer
x
Accelerated filer
¨
Non-accelerated filer
¨
(Do not check if a smaller reporting company)
Smaller reporting company
¨
CALCULATION OF REGISTRATION FEE
Title of securities to be registered
Amount to be registered
Proposed maximum
offering price
per share (1)
Proposed maximum
aggregate offering
price (1)
Amount of
registration fee
Common Stock,
$0.001 par value
2017 Equity Incentive Plan
2,050,000
$51.51
$105,595,500
$12,798.17
TOTAL
2,050,000
$51.51
$105,595,500
$12,798.17
(1)    Calculated solely for purposes of this offering under Rule 457(c) and (h) of the Securities Act on the basis of the average of the high and low selling price per share of Registrant's Common Stock as reported by the New York Stock Exchange on May 13, 2019.
EXPLANATORY NOTE
This Registration Statement is filed by PROS Holdings ("
Registrant
") to register additional securities issuable pursuant to the 2017 Stock Option and Incentive Plan, as amended and restated (the "
Plan
"), and consists of only those items required by General Instruction E to Form S-8. This Registration Statement on Form S-8 registers 2,050,000 additional shares of common stock, par value $0.001 per share (the "
Common Stock
"), of the Registrant reserved for issuance under the Plan, which shares are in addition to 2,500,000 shares of Common Stock previously registered pursuant to Registration Statement on Form S-8 filed with the Commission on July 7, 2017. The contents of the Registration Statement on Form S-8 filed with the Commission on July 7, 2017 are hereby incorporated by reference pursuant to General Instruction E to Form S-8. The additional 2,050,000 shares being registered pursuant to this Registration Statement were approved at the Annual Meeting of Stockholders of the Registrant held on May 7, 2019. After giving effect to this Registration Statement, an aggregate of 4,550,000 shares of Common Stock have been registered for issuance pursuant to the Plan.
PART I
Information Required in the Section 10(a) Prospectus
The documents containing the information specified in this Part I of Form S-8 will be sent or given to participants as specified by Rule 428(b)(1). In accordance with the rules and regulations of the Securities and Exchange Commission (the "
Commission
") and the Introductory Note to Part I of Form S-8, such documents are not being filed with the Commission either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to Rule 424.
PART II
Information Required in the Registration Statement
Item 8.    Exhibits
Number
Exhibit
4.1
Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1.1 of the Registrant's Form S-1 Registration Statement (Registration No. 333-141884), declared effective by the Securities and Exchange Commission on June 27, 2007, as amended).
4.2
Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 of the Registrant's Form 8-K filed with the Securities and Exchange Commission on August 21, 2013).
4.3
Specimen certificate for shares of common stock (incorporated by reference to Exhibit 4.1 of the Registrant's Form S-1 Registration Statement (Registration No. 333-141884), declared effective by the Securities and Exchange Commission on June 27, 2007, as amended).
4.4
Registration Statement No. 001-33554 on Form 8-A filed with the Securities and Exchange Commission on June 21, 2007, incorporated herein by reference pursuant to Item 3(c).
4.5
Amended and Restated 2017 Equity Incentive Plan (filed as Appendix A to the Registrant's Proxy Statement filed with the Securities and Exchange Commission on March 25, 2019).
5.1*
Opinion and Consent of DLA Piper LLP (US).
23.1*
Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm.
23.2*
Consent of DLA Piper LLP (US) is contained in Exhibit 5.1.
24.1*
Power of Attorney.
* Filed herewith
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 Houston, State of Texas on this 20th day of May, 2019.
PROS HOLDINGS, INC.
By:
/s/ Damian W. Olthoff
Damian W. Olthoff
General Counsel
EXHIBIT INDEX
Number
4.1
Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1.1 of the Registrant's Form S-1 Registration Statement (Registration No. 333-141884), declared effective by the Securities and Exchange Commission on June 27, 2007, as amended).
4.2
Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 of the Registrant's Form 8-K filed with the Securities and Exchange Commission on August 21, 2013).
4.3
Specimen certificate for shares of common stock (incorporated by reference to Exhibit 4.1 of the Registrant's Form S-1 Registration Statement (Registration No. 333-141884), declared effective by the Securities and Exchange Commission on June 27, 2007, as amended).
4.4
Registration Statement No. 001-33554 on Form 8-A filed with the Securities and Exchange Commission on June 21, 2007, incorporated herein by reference pursuant to Item 3(c).
4.5
Amended and Restated 2017 Equity Incentive Plan (filed as Appendix A to the Registrant's Proxy Statement filed with the Securities and Exchange Commission on March 25, 2019).
5.1*
Opinion and consent of DLA Piper LLP (US).
23.1*
Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm.
23.2*
Consent of DLA Piper LLP (US) is contained in Exhibit 5.1.
24.1*
Power of Attorney.
* Filed herewith