<SEC-DOCUMENT>0001193125-25-312839.txt : 20251209
<SEC-HEADER>0001193125-25-312839.hdr.sgml : 20251209
<ACCEPTANCE-DATETIME>20251209163415
ACCESSION NUMBER:		0001193125-25-312839
CONFORMED SUBMISSION TYPE:	S-8 POS
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251209
DATE AS OF CHANGE:		20251209
EFFECTIVENESS DATE:		20251209

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PROS Holdings, Inc.
		CENTRAL INDEX KEY:			0001392972
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING SERVICES [7371]
		ORGANIZATION NAME:           	06 Technology
		EIN:				760168604
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-8 POS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-256089
		FILM NUMBER:		251559555

	BUSINESS ADDRESS:	
		STREET 1:		3200 KIRBY DR.
		STREET 2:		SUITE 600
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77098
		BUSINESS PHONE:		713-335-5151

	MAIL ADDRESS:	
		STREET 1:		3200 KIRBY DR.
		STREET 2:		SUITE 600
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77098
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8 POS
<SEQUENCE>1
<FILENAME>d68570ds8pos.htm
<DESCRIPTION>S-8 POS
<TEXT>
<HTML><HEAD>
<TITLE>S-8 POS</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE" STYLE="line-height:Normal">


<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>As filed with the Securities and Exchange Commission on December&nbsp;9, 2025 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration <FONT STYLE="white-space:nowrap">No.&nbsp;333-186857</FONT> </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration <FONT STYLE="white-space:nowrap">No.&nbsp;333-193867</FONT> </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration No.&nbsp;333-219192 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration No.&nbsp;333-231623 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration No.&nbsp;333-256089 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration No.&nbsp;333-261407 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration No.&nbsp;333-271076 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration No.&nbsp;333-287732 </B></P>
<P STYLE="font-size:4pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;
</DIV><DIV STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</DIV> <P STYLE="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>UNITED STATES </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Washington, D.C. 20549 </B></P>
<P STYLE="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>POST-EFFECTIVE AMENDMENT NO.&nbsp;2 TO FORM <FONT STYLE="white-space:nowrap">S-8</FONT> REGISTRATION STATEMENT NO. <FONT
STYLE="white-space:nowrap">333-186857</FONT> </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>POST-EFFECTIVE AMENDMENT NO.&nbsp;1 TO FORM <FONT STYLE="white-space:nowrap">S-8</FONT>
REGISTRATION STATEMENT NO. <FONT STYLE="white-space:nowrap">333-193867</FONT> </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>POST-EFFECTIVE AMENDMENT NO.&nbsp;1 TO FORM <FONT
STYLE="white-space:nowrap">S-8</FONT> REGISTRATION STATEMENT NO. <FONT STYLE="white-space:nowrap">333-219192</FONT> </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>POST-EFFECTIVE
AMENDMENT NO.&nbsp;1 TO FORM <FONT STYLE="white-space:nowrap">S-8</FONT> REGISTRATION STATEMENT NO. <FONT STYLE="white-space:nowrap">333-231623</FONT> </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>POST-EFFECTIVE AMENDMENT NO.&nbsp;1 TO FORM <FONT STYLE="white-space:nowrap">S-8</FONT> REGISTRATION STATEMENT NO. <FONT
STYLE="white-space:nowrap">333-256089</FONT> </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>POST-EFFECTIVE AMENDMENT NO.&nbsp;1 TO FORM <FONT STYLE="white-space:nowrap">S-8</FONT>
REGISTRATION STATEMENT NO. <FONT STYLE="white-space:nowrap">333-261407</FONT> </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>POST-EFFECTIVE AMENDMENT NO.&nbsp;1 TO FORM <FONT
STYLE="white-space:nowrap">S-8</FONT> REGISTRATION STATEMENT NO. <FONT STYLE="white-space:nowrap">333-271076</FONT> </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>POST-EFFECTIVE
AMENDMENT NO.&nbsp;1 TO FORM <FONT STYLE="white-space:nowrap">S-8</FONT> REGISTRATION STATEMENT NO. <FONT STYLE="white-space:nowrap">333-287732</FONT> </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><I>UNDER </I></B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><I>THE
SECURITIES ACT OF 1933 </I></B></P> <P STYLE="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman" ALIGN="center"><B>PROS Holdings, Inc. </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(Exact name of registrant as specified in its charter) </B></P>
<P STYLE="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:8pt" ALIGN="center">


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<TD WIDTH="50%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="48%"></TD></TR>


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<TD VALIGN="top" ALIGN="center"><B>Delaware</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B><FONT STYLE="white-space:nowrap">76-0168604</FONT></B></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(State or other jurisdiction of</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>incorporation or organization)</B></P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(I.R.S. Employer</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Identification No.)</B></P></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" ALIGN="center"><B>3200 Kirby Drive, Suite 600, Houston, TX</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B>77098</B></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="top" ALIGN="center"><B>(Address of Principal Executive Offices)</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B>(Zip Code)</B></TD></TR>
</TABLE> <P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>PROS HOLDINGS, INC. 2007 EQUITY INCENTIVE PLAN </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>PROS HOLDINGS, INC. 2013 EMPLOYEE STOCK PURCHASE PLAN </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>AMENDED AND RESTATED 2017 EQUITY INCENTIVE PLAN, AS AMENDED </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>2021 EQUITY INDUCEMENT PLAN, AS AMENDED </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Full title of the plans) </B></P>
<P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Damian W. Olthoff </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>General Counsel and Secretary </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>PROS Holdings, Inc. </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>3200
Kirby Drive, Suite 600 </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Houston, Texas 77098 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Name and address of agent for service) </B></P>
<P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(713) <FONT STYLE="white-space:nowrap">335-5151</FONT> </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Telephone number, including area code, of agent for service) </B></P>
<P STYLE="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><I>Copies to</I></B>: </P> <P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>John
J. Gilluly III, PC </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Jeffrey Scharfstein, P.C. </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Brent L. Bernell </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>DLA
Piper LLP (US) </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>303 Colorado Street, Suite 3000 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Austin, Texas 78701 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(512) <FONT STYLE="white-space:nowrap">457-7000</FONT> </B></P>
<P STYLE="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a <FONT STYLE="white-space:nowrap">non-accelerated</FONT>
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 <FONT STYLE="white-space:nowrap">12b-2</FONT> of the Exchange Act. </P> <P STYLE="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="17%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="57%"></TD>

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<TD WIDTH="2%"></TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">Large&nbsp;accelerated&nbsp;filer</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9746;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Accelerated&nbsp;filer</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9744;</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">Non-accelerated filer</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Smaller&nbsp;reporting&nbsp;company</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9744;</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Emerging&nbsp;growth&nbsp;company</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9744;</TD></TR>
</TABLE> <P STYLE="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">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&nbsp;7(a)(2)(B) of the Securities Act.&#8194;&#9744; </P>
<P STYLE="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;
</DIV><DIV STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</DIV>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>EXPLANATORY NOTE </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">These Post-Effective Amendments (the &#8220;<B><I>Amendments</I></B>&#8221;) filed by PROS Holdings, Inc., a Delaware corporation (the
&#8220;<B><I>Registrant</I></B>&#8221;), terminate all offerings and deregister all shares of the Registrant&#8217;s common stock, par value $0.001 per share (the &#8220;<B><I>Shares</I></B>&#8221;), that remain unsold or otherwise unissued under
the following Registration Statements on Form <FONT STYLE="white-space:nowrap">S-8</FONT> (each, a &#8220;<B><I>Registration Statement</I></B>&#8221;, and collectively, the &#8220;<B><I>Registration Statements</I></B>&#8221;) filed by the Registrant
with the U.S. Securities and Exchange Commission (the &#8220;<B><I>SEC</I></B>&#8221;): </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297213000012/forms-8document.htm">Registration Statement
 on Form <FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT STYLE="white-space:nowrap">&nbsp;333-186857)</FONT></A>, filed with the SEC on February&nbsp;25, 2013, registering 900,000 Shares issuable under the PROS Holdings, Inc. 2007
Equity Incentive Plan, as amended by that <A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297213000014/a2013forms-8pos.htm">Post-Effective Amendment No.<U></U>&nbsp;1 to Form <FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT
STYLE="white-space:nowrap">&nbsp;333-186857)</FONT></A>, filed with the SEC on February&nbsp;26, 2013. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297214000018/s-810feb2014.htm">Registration Statement
 on Form <FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT STYLE="white-space:nowrap">&nbsp;333-193867)</FONT></A>, filed with the SEC on February&nbsp;11, 2014, registering 900,000 Shares issuable under the PROS Holdings, Inc. 2007
Equity Incentive Plan and 500,000 Shares issuable under the PROS Holdings, Inc. 2013 Employee Stock Purchase Plan. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297217000092/s-8.htm">Registration Statement on Form
<FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT STYLE="white-space:nowrap">&nbsp;333-219192)</FONT></A>, filed with the SEC on July&nbsp;7, 2017, registering 2,500,000 Shares issuable under the PROS Holdings, Inc. 2017 Equity
Incentive Plan. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297219000104/s-8may2019.htm">Registration Statement on
Form <FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT STYLE="white-space:nowrap">&nbsp;333-231623)</FONT></A>, filed with the SEC on May&nbsp;20, 2019, registering 2,050,000 Shares issuable under the PROS Holdings, Inc. 2017 Equity
Incentive Plan, as amended. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297221000074/forms-813may2021.htm">Registration Statement
 on Form <FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT STYLE="white-space:nowrap">&nbsp;333-256089)</FONT></A>, filed with the SEC on May&nbsp;13, 2021, registering 3,100,000 Shares issuable under the PROS Holdings, Inc. 2017
Equity Incentive Plan, as amended and 500,000 Shares issuable under the PROS Holdings, Inc. 2013 Employee Stock Purchase Plan. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297221000105/forms-8_x30nov2021.htm">Registration Statement
 on Form <FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT STYLE="white-space:nowrap">&nbsp;333-261407)</FONT></A>, filed with the SEC on November&nbsp;30, 2021, registering 332,004 Shares issuable under the 2021 Equity Inducement
Plan. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297223000061/forms-8march2023.htm">Registration Statement
 on Form <FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT STYLE="white-space:nowrap">&nbsp;333-271076)</FONT></A>, filed with the SEC on April&nbsp;3, 2023, registering 2,900,000 Shares issuable under the Amended and Restated 2017
Equity Incentive Plan, as amended. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1392972/000139297225000109/forms-8may2025.htm">Registration Statement
 on Form <FONT STYLE="white-space:nowrap">S-8</FONT> (File No.<U></U><FONT STYLE="white-space:nowrap">&nbsp;333-287732)</FONT></A>, filed with the SEC on June&nbsp;3, 2025, registering 3,000,000 Shares issuable under the Amended and Restated 2017
Equity Incentive Plan, as amended and 789,176 Shares issuable under the 2021 Equity Inducement Plan, as amended. </P></TD></TR></TABLE>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Pursuant to an Agreement and Plan of Merger (the &#8220;<B><I>Merger Agreement</I></B>&#8221;), dated as of September&nbsp;22, 2025, among the
Registrant, Portofino Parent, LLC, a Delaware limited liability company (&#8220;<B><I>Parent</I></B>&#8221;), and Portofino Merger Sub, Inc., a Delaware corporation and a wholly owned direct subsidiary of Parent (&#8220;<B><I>Merger
Subsidiary</I></B>&#8221;), Merger Subsidiary was merged with and into the Registrant (the &#8220;<B><I>Merger</I></B>&#8221;), with the Registrant continuing as the surviving corporation and a wholly owned direct subsidiary of Parent. The Merger
became effective on December&nbsp;9, 2025. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">In connection with the closing of the Merger, the offerings pursuant to the Registration
Statements have been terminated. In accordance with undertakings made by the Registrant in the Registration Statements to remove from registration, by means of a post-effective amendment, any of the securities that remain unsold at the termination
of the offerings, the Registrant hereby removes from registration all Shares registered under the Registration Statements but not sold under the Registration Statements. </P>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>SIGNATURES </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form <FONT STYLE="white-space:nowrap">S-8</FONT> and has duly caused these Post-Effective Amendments to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of
Texas, on December&nbsp;9, 2025: </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
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<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="5"><B>PROS HOLDINGS, INC.</B></TD></TR>
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<TD HEIGHT="16" COLSPAN="4"></TD></TR>
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<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Damian W. Olthoff</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Damian W. Olthoff</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">General Counsel and Secretary</TD></TR>
</TABLE></DIV> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">No other person is required to sign this Post-Effective Amendment in reliance upon Rule 478 under the
Securities Act of 1933, as amended. </P>
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