<SEC-DOCUMENT>0001104659-25-046736.txt : 20250509
<SEC-HEADER>0001104659-25-046736.hdr.sgml : 20250509
<ACCEPTANCE-DATETIME>20250509161555
ACCESSION NUMBER:		0001104659-25-046736
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20250509
DATE AS OF CHANGE:		20250509
EFFECTIVENESS DATE:		20250509

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Information Services Group Inc.
		CENTRAL INDEX KEY:			0001371489
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
		ORGANIZATION NAME:           	07 Trade & Services
		EIN:				205261587
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-287152
		FILM NUMBER:		25930640

	BUSINESS ADDRESS:	
		STREET 1:		2187 ATLANTIC STREET
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902
		BUSINESS PHONE:		203-517-3100

	MAIL ADDRESS:	
		STREET 1:		2187 ATLANTIC STREET
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>tm2514571d1_s8.htm
<DESCRIPTION>FORM S-8
<TEXT>
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>As filed with the Securities and Exchange Commission
on May 9, 2025. </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>Registration No.&nbsp;333- </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549 </B></P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">&nbsp;</P>

<P STYLE="border-top: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM S-8 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>REGISTRATION STATEMENT </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><I>UNDER </I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><I>THE SECURITIES ACT OF 1933 </I></B>&nbsp;</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">&nbsp;</P>

<P STYLE="border-top: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>INFORMATION SERVICES GROUP, INC. </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Exact name of registrant as specified in its
charter) </B>&nbsp;</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="border-top: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="vertical-align: top; text-align: center; font-size: 10pt; width: 49%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Delaware</B></FONT></TD>
    <TD STYLE="text-align: center; vertical-align: bottom; font-size: 10pt; width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; font-size: 10pt; width: 49%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>20-5261587</B></FONT></TD></TR>
  <TR>
    <TD STYLE="text-align: center; vertical-align: top"><B>(State or other jurisdiction of<BR>
incorporation
or organization)</B></TD>
    <TD STYLE="text-align: center; vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; vertical-align: top"><B>(I.R.S. Employer<BR>
Identification No.)</B></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>2187 Atlantic Street</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Stamford, CT 06902</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Address of Principal Executive Offices) </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Information Services Group, Inc. Amended and
Restated 2007 Equity and Incentive Award Plan<BR>
Information Services Group, Inc. Amended and Restated 2007 Employee Stock Purchase Plan</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Full Title of the plan) </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Michael A. Sherrick</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Executive Vice President and Chief Financial
Officer</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Information Services Group, Inc. </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>2187 Atlantic Street<BR>
Stamford, CT 06902</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Name and address of agent for service) </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="border-top: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(203) 517-3100</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Telephone number, including area code, of agent
for service) </B>&nbsp;</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="border-top: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Indicate by check mark whether the registrant
is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company.
See the definitions of &ldquo;large accelerated filer,&rdquo; &ldquo;accelerated filer,&rdquo; &ldquo;smaller reporting company&rdquo;
and &ldquo;emerging growth company&rdquo; in Rule 12b-2 of the Exchange Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 21%; font-size: 10pt"><FONT STYLE="font-size: 10pt">Large&nbsp;accelerated&nbsp;filer</FONT></TD>
    <TD STYLE="width: 6%; font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD>
    <TD STYLE="width: 24%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 29%; font-size: 10pt"><FONT STYLE="font-size: 10pt">Accelerated&nbsp;filer</FONT></TD>
    <TD STYLE="width: 20%; font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#120;</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Non-accelerated filer</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Smaller reporting&nbsp;company</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#120;</FONT></TD></TR>

<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 21%">&nbsp;</TD>
    <TD STYLE="width: 6%">&nbsp;</TD>
    <TD STYLE="width: 24%">&nbsp;</TD>
    <TD STYLE="width: 29%"><FONT STYLE="font-size: 10pt">Emerging growth company</FONT></TD>
    <TD STYLE="width: 20%"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">If an emerging growth company, indicate by check
mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting
standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. <FONT STYLE="font-family: Wingdings">&#168;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>EXPLANATORY NOTE </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">This Registration Statement on Form S-8 (the &ldquo;Registration
Statement&rdquo;) is being filed by Information Services Group, Inc. (the &ldquo;Registrant&rdquo;) for the purpose of registering (i)
an additional 4,400,000 shares (the &ldquo;Incentive Plan Shares&rdquo;) of the Registrant&rsquo;s common stock, $0.001 par value per
share (the &ldquo;Common Stock&rdquo;), pursuant to the Information Services Group, Inc. Amended and Restated 2007 Equity and Incentive
Award Plan, as further amended (the &ldquo;Incentive Plan&rdquo;), and (ii) an additional 1,200,000 shares (the &ldquo;ESPP Shares&rdquo;
and together with the Incentive Plan Shares, the &ldquo;Shares&rdquo;) of the Registrant&rsquo;s Common Stock pursuant to the Information
Services Group, Inc. Amended and Restated 2007 Employee Stock Purchase Plan (the &ldquo;ESPP&rdquo; and together with the Incentive Plan,
the &ldquo;Plans&rdquo;).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">In accordance with General Instruction E to
Form S-8, the contents of the Registration Statements on Form S-8 of the Registrant filed with the Securities and Exchange
Commission (the &ldquo;Commission&rdquo;) on <A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465908020725/a08-9458_1s8.htm" STYLE="-sec-extract: exhibit">March
28, 2008 (Registration No. 333-149950)</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465910044426/a10-15850_1s8.htm" STYLE="-sec-extract: exhibit">August
13, 2010 (Registration No. 333-168848)</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000104746914005136/a2220297zs-8.htm" STYLE="-sec-extract: exhibit">May
22, 2014 (Registration No. 333-196193)</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465917033492/a17-13245_1s8.htm" STYLE="-sec-extract: exhibit">May
17, 2017 (Registration No. 333-218061)</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465920059659/tm2019214d1_s8.htm" STYLE="-sec-extract: exhibit">May
11, 2020 (Registration No. 333-238177)</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465923101647/tm2326252d1_s8.htm" STYLE="-sec-extract: exhibit">September
18, 2023 (Registration No. 333-274560)</A> and <A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000155837024008604/tmb-20240523xs8.htm" STYLE="-sec-extract: exhibit">May
23, 2024 (Registration No. 333-279672)</A>, including any amendments thereto or filings incorporated therein, are incorporated
herein by this reference to the extent not replaced hereby.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PART I</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">The documents containing the information specified
by Part I of Form S-8 (Plan Information and Registrant Information and Employee Annual Information) have been or will be delivered to
each participant in each of the Plans, as specified in Rule 428(b)(1) promulgated by the Securities and Exchange Commission (the &ldquo;Commission&rdquo;
or &ldquo;SEC&rdquo;) under the Securities Act of 1933, as amended (the &ldquo;Securities Act&rdquo;), and the instructions to Form S-8.
This information has been omitted from this filing in accordance with the provisions of Rule 424 under the Securities Act and the introductory
note to Part I of Form S-8. These documents and the documents incorporated by reference in this Registration Statement pursuant to Item
3 of Part II of this Registration Statement, taken together, constitute a prospectus that meets the requirements of Section 10(a) of the
Securities Act.</P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PART II</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 3.</B></FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Incorporation of Documents by Reference</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0in; text-indent: 0in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">The following documents filed with the Commission
are hereby incorporated by reference in this Registration Statement:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in">&nbsp;</TD><TD STYLE="width: 0.25in">(a)</TD><TD STYLE="text-align: justify">The Registrant&rsquo;s <A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000155837025002897/iii-20241231x10k.htm" STYLE="-sec-extract: exhibit">Annual Report on Form 10-K for the fiscal year ended December 31, 2024, filed with the Commission on March 13, 2025</A> (the &ldquo;Annual Report&rdquo;);</TD></TR>
<TR STYLE="vertical-align: top">
<TD>&nbsp;</TD><TD>&nbsp;</TD><TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in">&nbsp;</TD><TD STYLE="width: 0.25in">(b)</TD><TD STYLE="text-align: justify">The portions of the Registrant&rsquo;s <A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000114036125008785/ny20040416x1_def14a.htm" STYLE="-sec-extract: exhibit">Definitive Proxy Statement on Schedule 14A for the 2025 Annual Meeting of Stockholders, filed with the Commission on March 14, 2025</A>, that are incorporated by reference into the Annual Report;</TD></TR>
<TR STYLE="vertical-align: top">
<TD>&nbsp;</TD><TD>&nbsp;</TD><TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in">&nbsp;</TD><TD STYLE="width: 0.25in">(c)</TD><TD STYLE="text-align: justify">The Registrant&rsquo;s <A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000155837025007132/iii-20250331x10q.htm" STYLE="-sec-extract: exhibit">Quarterly Report on Form 10-Q for the quarter ended March 31, 2025, filed with the Commission on May 9, 2025</A>;</TD></TR>
<TR STYLE="vertical-align: top">
<TD>&nbsp;</TD><TD>&nbsp;</TD><TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in">&nbsp;</TD><TD STYLE="width: 0.25in">(d)</TD><TD STYLE="text-align: justify">The Registrant&rsquo;s Current Reports on Form 8-K filed with the Commission on <A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000110465925039412/tm2513190d1_8k.htm" STYLE="-sec-extract: exhibit">April 25, 2025</A> and <A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000155837025006999/iii-20250508x8k.htm" STYLE="-sec-extract: exhibit">May 8, 2025</A> (except that, with respect to the foregoing Current Reports on Form 8-K, any portions thereof which are furnished and not filed
shall not be deemed incorporated by reference into this Registration Statement); and</TD></TR>
<TR STYLE="vertical-align: top">
<TD>&nbsp;</TD><TD>&nbsp;</TD><TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in">&nbsp;</TD><TD STYLE="width: 0.25in">(e)</TD><TD STYLE="text-align: justify">The description of the Registrant&rsquo;s Common Stock incorporated by reference to <A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000155837020002405/iii-20191231ex42dbb05ba.htm" STYLE="-sec-extract: exhibit">Exhibit 4.2</A> to the
Annual Report, and as amended by any subsequent amendment or any report filed for the purpose of updating such description.&nbsp;</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">The Registrant also incorporates by reference
into this Registration Statement all information contained in additional documents (other than portions of the documents that are furnished
under Item 2.02 or Item 7.01 of a Current Report on Form 8-K and exhibits furnished on such form that relate to such items, unless otherwise
indicated therein) that it files with the Commission pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of
1934, as amended (the &ldquo;Exchange Act&rdquo;), prior to the filing of a post-effective amendment to this Registration Statement which
indicates that all of the shares of Common Stock offered have been sold or which deregisters all of such shares then remaining unsold.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Any statement contained in a document incorporated
or deemed to be incorporated by reference herein shall be deemed to be modified or superseded to the extent that a statement contained
herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes
such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a
part of this Registration Statement. The modifying or superseding statement need not state that it has modified or superseded a prior
statement or include any other information set forth in the document that it modifies or supersedes. The making of such a modifying or
superseding statement shall not be deemed an admission for any purposes that the modified or superseded statement, when made, constituted
a misrepresentation, an untrue statement of a material fact or an omission to state a material fact that is required to be stated or that
is necessary to make a statement not misleading in light of the circumstances in which it was made. You should not assume that the information
in this Registration Statement or in the documents incorporated by reference is accurate as of any date other than the date of this Registration
Statement or those documents.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 4.</B></FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Description of Securities</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 5.</B></FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Interests of Named Experts and Counsel</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 6.</B></FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Indemnification of Directors and Officers</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Pursuant to section 145 of the Delaware
General Corporation Law (the &ldquo;DGCL&rdquo;), a corporation has the power to indemnify a party to any threatened, pending or
completed legal proceeding by reason of his or her service on behalf of a corporation. The DGCL further mandates that
indemnification shall be made to any such person who has been successful &ldquo;on the merits&rdquo; or &ldquo;otherwise&rdquo; with
respect to the defense of any such proceeding but does not require indemnification in any other circumstances. The DGCL provides
that a corporation has the power to indemnify a director, officer, employee or agent of the corporation and certain other persons
serving at the request of the corporation in related capacities against amounts paid and expenses incurred in connection with an
action or proceeding to which he or she is or is threatened to be made a party by reason of such position, if such person has acted
in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation, and,
in any criminal proceeding, if such person had no reasonable cause to believe his or her conduct was unlawful; provided that, in the
case of actions brought by or in the right of the corporation, no indemnification may be made with respect to any matter as to which
such person has been adjudged to be liable to the corporation unless and only to the extent that the adjudicating court determines
that such indemnification is proper under the circumstances. A corporation may advance the expenses incurred in defending such a
proceeding upon the giving of an undertaking, or promise, to repay such sums in the event it is later determined that such
indemnitee is not entitled to be indemnified.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Pursuant to Section 9 of the Registrant&rsquo;s
Fourth Amended and Restated Certificate of Incorporation (the &ldquo;Charter&rdquo;), the Registrant shall indemnify to the fullest extent
permitted by section 145 of the DGCL each person that such section grants the Registrant the power to indemnify and shall advance expenses
incurred by an indemnified person in defending any civil, criminal, administrative, or investigative action, suit or proceeding for which
such indemnified person may be entitled to indemnification.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">The Registrant also maintains insurance for its
directors and officers against certain liabilities, including liabilities under the Securities Act. The effect of this insurance is to
indemnify any director or officer of the Registrant against expenses, including, without limitation, attorneys&rsquo; fees, judgments,
fines and amounts paid in settlement, incurred by a director or officer upon a determination that such person acted in good faith. The
premiums for such insurance are paid by the Registrant.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Under separate indemnification agreements with
the Registrant, each director and certain officers of the Registrant are indemnified against certain liabilities relating to his or her
position as a director or officer of the Registrant, to the fullest extent permitted under applicable law.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 7.</B></FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exemption From Registration Claimed</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 8.</B></FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exhibits</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10%; text-align: left"><U>Exhibit No.</U></TD><TD STYLE="text-align: justify; width: 90%"><U>Description</U></TD>
</TR>
<TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%"><A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000104746907000443/a2175732zex-3_1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.1</FONT></A></TD>
    <TD STYLE="text-align: justify; width: 90%"><A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000104746907000443/a2175732zex-3_1.htm" STYLE="-sec-extract: exhibit">Fourth Amended and Restated Certificate of Incorporation
    of Information Services Group, Inc. (previously filed as Exhibit 3.1 to Amendment No. 5 to the Registrant&rsquo;s Registration Statement
    on Form S-1 filed with the Commission on January 29, 2007 (Commission File Number: 333-136536) and incorporated herein by reference)</A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465913042027/a13-12544_1ex3d1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.2</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465913042027/a13-12544_1ex3d1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Amended
and Restated By-Laws of Information Services Group, Inc., dated as of May 13, 2013 (previously filed as Exhibit 3.1 to the Registrant&rsquo;s
Form 8-K filed with the Commission on May 15, 2013 (Commission File Number: 001-33287) and incorporated herein by reference)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465917068011/a17-26393_1ex3d1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.3</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000110465917068011/a17-26393_1ex3d1.htm" STYLE="-sec-extract: exhibit">Amendment to the Amended and Restated By-Laws
    of Information Services Group, Inc., dated as of November 8, 2017 (previously filed as Exhibit 3.1 to the Registrant&rsquo;s Form 8 K
    filed with the Commission on November 13, 2017 (Commission File Number: 001-33287) and incorporated herein by reference)</A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000104746906015247/a2175257zex-4_2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.4</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1371489/000104746906015247/a2175257zex-4_2.htm" STYLE="-sec-extract: exhibit">Specimen Common Stock Certificate (previously
    filed as Exhibit 4.2 to Amendment No. 3 to the Registrant&rsquo;s Registration Statement on Form S-1 filed with the Commission on December
    22, 2006 (Commission File Number: 333-136536), and incorporated herein by reference)</A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="tm2514571d1_ex5-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">5.1*</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="tm2514571d1_ex5-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Opinion of Katten Muchin Rosenman LLP with respect to the legality of securities</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>

<TR STYLE="vertical-align: top">
    <TD><A HREF="tm2514571d1_ex23-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.1*</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="tm2514571d1_ex23-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent of PricewaterhouseCoopers LLP</FONT></A></TD></TR>

<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD><A HREF="tm2514571d1_ex5-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.2*</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="tm2514571d1_ex5-1.htm" STYLE="-sec-extract: exhibit">Consent of Katten Muchin Rosenman LLP (included in Exhibit 5.1)</A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="#SS01"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">24.1*</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="#SS01">Power of Attorney (included in the signature pages hereto)</A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000114036125008785/ny20040416x1_def14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">99.1 </FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000114036125008785/ny20040416x1_def14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Information Services Group, Inc. Amended and Restated 2007 Equity and Incentive Award Plan (previously filed as Appendix A to the Registrant&rsquo;s Definitive Proxy Statement filed with the SEC on March 14, 2025 (Commission File Number 001-33287) and incorporated herein by reference).</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000114036125008785/ny20040416x1_def14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">99.2</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1371489/000114036125008785/ny20040416x1_def14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">Information Services Group, Inc. Amended and Restated 2007 Employee Stock Purchase Plan (previously filed as Appendix B to the Registrant&rsquo;s Definitive Proxy Statement filed with the SEC on March 14, 2025 (Commission File Number 001-33287) and incorporated herein by reference).</FONT></A></TD></TR>

<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD><A HREF="tm2514571d1_ex-filingfees.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">107*</FONT></A></TD>
    <TD STYLE="text-align: justify"><A HREF="tm2514571d1_ex-filingfees.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filing Fee Table</FONT></A></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">*Filed herewith.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in"></P>

<!-- Field: Page; Sequence: 4 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 9.</B></FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Undertakings</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(a) The undersigned registrant hereby undertakes:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.25in">&nbsp;</TD>
    <TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.5in">&nbsp;</TD>
    <TD STYLE="width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(i)</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">to include any prospectus required by section 10(a)(3) of the Securities Act;</FONT></TD></TR>
  </TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.5in">&nbsp;</TD>
    <TD STYLE="width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(ii)</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">to reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of a prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the &ldquo;<I>Calculation of Filing Fee Tables</I>&rdquo; or &ldquo;<I>Calculation of Registration Fee</I>&rdquo; table, as applicable, in the effective registration statement;</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.5in">&nbsp;</TD>
    <TD STYLE="width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(iii)</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">to include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">provided, however, that the undertakings set forth
in paragraphs (a)(1)(i) and (a)(1)(ii) of this section do not apply if the information required to be included in a post-effective amendment
by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section
15(d) of the Exchange Act that are incorporated by reference in the registration statement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.25in">&nbsp;</TD>
    <TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</FONT></TD></TR>
  </TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.25in">&nbsp;</TD>
    <TD STYLE="width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.</FONT></TD></TR>
  </TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">(b) The undersigned registrant hereby undertakes
that, for purposes of determining any liability under the Securities Act, each filing of the registrant&rsquo;s annual report pursuant
to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan&rsquo;s annual report
pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a
new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed
to be the initial<I>&nbsp;bona fide</I>&nbsp;offering thereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">(c) Insofar as indemnification for liabilities
arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing
provisions, or otherwise, the registrant has been advised that in the opinion of the Commission such indemnification is against public
policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the
registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled
by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.</P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B></B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><U>SIGNATURES</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">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
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 Stamford, State of Connecticut, on this 9th day of May, 2025.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>INFORMATION SERVICES GROUP, INC.</B></FONT></TD></TR>
  <TR>
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 47%">&nbsp;</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">By:</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif">/s/ Michael
A. Sherrick</FONT></TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Michael A. Sherrick </FONT></TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Executive Vice President and Chief Financial Officer (principal financial officer)</FONT></TD></TR>
  </TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<P STYLE="margin-top: 0; margin-bottom: 0"></P>

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<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>


























<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><U><A NAME="SS01"></A>POWER OF ATTORNEY</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Each person whose signature appears below hereby
constitutes and appoints Michael P. Connors and Michael A. Sherrick, and each of them severally, acting alone and without the other, his
or her true and lawful attorneys-in-fact and agents, with full power of substitution, to sign on his or her behalf, individually and in
each capacity stated below, all amendments and post-effective amendments to this Registration Statement on Form S-8 and to file the same,
with all exhibits thereto and any other documents in connection therewith, with the Securities and Exchange Commission under the Securities
Act of 1933, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite
and necessary to be done in and about the premises, as fully and to all intents and purposes as each might or could do in person, hereby
ratifying and confirming each act that said attorneys-in-fact and agents may lawfully do or cause to be done by virtue thereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Pursuant to the requirements of the Securities
Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 32%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Signature</B></FONT></TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 44%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Titles</B></FONT></TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="text-align: center; width: 20%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Date</B></FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/Michael P. Connors</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Chairman and Chief Executive Officer </FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center; white-space: nowrap"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">May 9, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Michael P. Connors</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Principal Executive Officer)</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/Michael A. Sherrick</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Executive Vice President and Chief Financial Officer </FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center; white-space: nowrap"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">May 9, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Michael A. Sherrick </FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Principal Financial Officer and Principal Accounting Officer)</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/Gerald S. Hobbs</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center; white-space: nowrap"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">May 9, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Gerald S. Hobbs</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Samuel L. Molinaro Jr. </FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center; white-space: nowrap"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">May 9, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Samuel L. Molinaro Jr. </FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Bruce N. Pfau</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center; white-space: nowrap"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">May 9, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Bruce N. Pfau</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Christine Putur</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center; white-space: nowrap"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">May 9, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Christine Putur</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Kalpana Raina</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center; white-space: nowrap"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">May 9, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Kalpana Raina</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
  </TABLE>

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<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>tm2514571d1_ex5-1.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
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<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>Exhibit 5.1</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Opinion of Katten Muchin Rosenman LLP, the legal
counsel to the Company</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">May 9, 2025</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Information Services Group, Inc.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">2187 Atlantic
Street<BR>
Stamford, CT</FONT> 06902</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Ladies and Gentlemen:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">We have acted as counsel to Information Services
Group, Inc., a Delaware corporation (the &ldquo;Company&rdquo;), in connection with the filing of a Registration Statement on Form S-8
(the &ldquo;Registration Statement&rdquo;) for the registration under the Securities Act of 1933, as amended (the &ldquo;Act&rdquo;),
of the issuance and sale by the Company of (i) up to an additional 4,400,000 shares (the &ldquo;Incentive Plan Shares&rdquo;) of the Company&rsquo;s
common stock, $0.001 par value per share (the &ldquo;Common Stock&rdquo;), pursuant to the Information Services Group, Inc. Amended and
Restated 2007 Equity and Incentive Award Plan (the &ldquo;Incentive Plan&rdquo;), and (ii) up to an additional 1,200,000 shares (the &ldquo;ESPP
Shares&rdquo; and together with the Incentive Plan Shares, the &ldquo;Shares&rdquo;) of the Company&rsquo;s Common Stock pursuant to the
Information Services Group, Inc. Amended and Restated 2007 Employee Stock Purchase Plan (the &ldquo;ESPP&rdquo; and together with the
Incentive Plan, the &ldquo;Plans&rdquo;). This opinion is being furnished in accordance with the requirements of Item&nbsp;601(b)(5) of
Regulation S-K under the Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">In connection with this opinion, we have relied
as to matters of fact, without investigation, upon certificates of public officials and others and upon an executed copy of a certificate
of Michael A. Sherrick, Executive Vice President and Chief Financial Officer of the Company, dated of even date herewith (the &ldquo;Officer&rsquo;s
Certificate&rdquo;). We have also examined and relied upon originals or copies, certified or otherwise identified to our satisfaction,
of the following:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">1. the Registration Statement and all
exhibits thereto;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">2. a copy of the Incentive Plan and
the ESPP, as certified in the Officer&rsquo;s Certificate;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">3. a copy of the Fourth Amended and
Restated Certificate of Incorporation of the Company, as certified by the Secretary of State of the State of Delaware on April 30, 2025
and in the Officer&rsquo;s Certificate;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">4. a copy of the Amended and Restated
Bylaws of the Company (including all amendments thereto), as certified in the Officer&rsquo;s Certificate;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">5. records of proceedings and actions
of the Board of Directors, committees thereof and stockholders of the Company relating to the Incentive Plan and the ESPP, as certified
in the Officer&rsquo;s Certificate; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify">6. such other instruments, documents,
statements and records of the Company and others as we have deemed relevant and necessary to examine and rely upon for the purpose of
this opinion.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">In connection with this opinion, we have assumed
at all applicable times the legal capacity of all natural persons, the accuracy and completeness of all documents and records that we
have reviewed, the genuineness of all signatures, the authenticity of the documents submitted to us as originals and the conformity to
authentic original documents of all documents submitted to us as certified, conformed or reproduced copies. With respect to documents
executed or to be executed by parties other than the Company, we have assumed that such parties had or will have the power and authority,
corporate or other, to enter into and perform all obligations thereunder and have also assumed the valid existence of such parties, the
due authorization by all requisite action, corporate or other of, and execution and delivery by, such parties of such documents and the
validity and binding effect thereof on such parties. We have also assumed that, at the time of issuance of any of the Shares, (i) the
forms of any and all agreements related to the issuance of the Shares under either Plan will have been approved by the Board of Directors
or the Committee (as defined in the Plans), will be consistent with terms of the applicable Plan, and will have been duly executed and
delivered by the Company and, as applicable, the recipients of the Shares, (ii) the Committee (as defined in the applicable Plan) will
have approved the issuance of any awards of the Shares pursuant to the applicable Plan, and (iii) any cash consideration payable to the
Company in connection with the issuance of any of the Shares will not be less than the par value per share of the Common Stock.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Based upon and subject to the foregoing, it is
our opinion that the Shares have been duly authorized for issuance, and when the Shares are issued and delivered by the Company and (to
the extent applicable) paid for in accordance with the terms of the applicable Plan and the relevant award agreements and the Shares have
been registered and issued electronically by the transfer agent and registrar for the Common Stock, the Shares will be validly issued,
fully paid and non-assessable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Our opinion expressed above is subject to the
qualification that we express no opinion to the extent that, notwithstanding the Company&rsquo;s current reservation of shares of Common
Stock, future issuances of securities of the Company, including the Shares and/or shares issued or issuable pursuant to antidilution adjustments
to outstanding securities of the Company, may cause the awards currently outstanding under the applicable Plan to be exercisable or redeemable
for more shares of Common Stock than the number that then remain authorized but unissued.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Our opinion expressed above is limited to the
Delaware General Corporation Law, and we do not express any opinion concerning any other laws. We do not find it necessary for the purposes
of this opinion, and accordingly we do not purport to cover herein, the application of the securities or &ldquo;Blue Sky&rdquo; laws of
the various states to the issuance of the Shares.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">This opinion is limited to the specific issues
addressed herein, and no opinion may be inferred or implied beyond that expressly stated herein. This opinion speaks only as of the date
hereof, and we assume no obligation to revise or supplement this opinion after the date of effectiveness of the Registration Statement
should the present laws of the State of Delaware be changed by legislative action, judicial decision or otherwise after the date hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">We hereby consent to the filing of this opinion
with the Securities and Exchange Commission as an exhibit to the Registration Statement. In giving this consent, we do not thereby admit
that we are experts within the meaning of Section 11 of the Act or included in the category of persons whose consent is required under
Section 7 of the Act or the rules and regulations of the Securities and Exchange Commission. Very truly yours,</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">/s/ Katten Muchin Rosenman LLP</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">KATTEN MUCHIN ROSENMAN LLP</P>

<P STYLE="margin: 0">&nbsp;</P>

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<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>tm2514571d1_ex23-1.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>Exhibit 23.1</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING
FIRM</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">We hereby consent to the incorporation by reference
in this Registration Statement on Form&nbsp;S-8&#8239;of Information Services Group, Inc. of our report dated March 13, 2025 relating to the financial statements, financial statement
schedule and&#8239;the effectiveness of internal control over financial reporting, which appears in Information Services Group, Inc.&rsquo;s Annual
Report on Form 10-K for the year ended December&nbsp;31, 2024.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">/s/ PricewaterhouseCoopers LLP</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">New York, New York</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">May 9, 2025</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<DOCUMENT>
<TYPE>EX-FILING FEES
<SEQUENCE>4
<FILENAME>tm2514571d1_ex-filingfees.htm
<DESCRIPTION>EX-FILING FEES
<TEXT>
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>Exhibit 107</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Form S-8</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Form Type)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Information Services Group, Inc.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact Name of Registrant as Specified in its Charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><U>Table 1: Newly Registered Securities</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="border: Black 1pt solid; padding: 3pt 5pt; width: 11%"><B>Security<BR>
Type</B></TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; text-align: center; width: 22%"><B>Security Class<BR>
Title (1)</B></TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; text-align: center; width: 17%"><B>Fee Calculation<BR>
Rule</B></TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; text-align: center; width: 10%"><B>Amount<BR>
Registered<BR>
</B>(1)</TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; text-align: center; width: 10%"><B>Proposed<BR>
Maximum<BR>
Offering<BR>
Price Per<BR>
Share<BR>
</B>(3)</TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; text-align: center; width: 10%"><B>Maximum<BR>
Aggregate<BR>
Offering<BR>
Price <BR>
</B>(3)</TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; font-size: 10pt; text-align: center; width: 10%"><FONT STYLE="font-size: 10pt"><B>Fee Rate</B></FONT></TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; text-align: center; width: 10%"><B>Amount of<BR>
Registration<BR>
Fee</B></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="border-right: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt 5pt; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">Equity</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">Common Stock, $0.001 par value per share</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">Rule 457(c) and Rule 457(h)</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">5,600,000 (2)</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">$3.93</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">$22,008,000</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">$153.10 per $1,000,000</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">$3,369.43</FONT></TD></TR>
  <TR>
    <TD COLSPAN="4" STYLE="border-right: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt 5pt; border-bottom: Black 1pt solid; vertical-align: top; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>Total Offering Amounts</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">$22,008,000</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">$3,369.43</FONT></TD></TR>
  <TR>
    <TD COLSPAN="4" STYLE="border-right: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt 5pt; border-bottom: Black 1pt solid; vertical-align: top; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>Total Fee Offsets</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">$-</FONT></TD></TR>
  <TR>
    <TD COLSPAN="4" STYLE="border-right: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt 5pt; border-bottom: Black 1pt solid; vertical-align: top; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>Net Fee Due</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt 5pt; vertical-align: bottom; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">$3,369.43</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.25in"><FONT STYLE="font-size: 10pt">(1)</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the &ldquo;Securities Act&rdquo;), this Registration Statement shall also cover any additional shares of the Registrant&rsquo;s common stock, par value $0.001 per share (the &ldquo;Common Stock&rdquo;), that may become issuable under the Information Services Group, Inc. Amended and Restated 2007 Equity and Incentive Award Plan (the &ldquo;Incentive Plan&rdquo;) and the Information Services Group, Inc. Amended and Restated 2007 Employee Stock Purchase Plan (the &ldquo;ESPP&rdquo;) in respect of the securities identified in the table above by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without the Registrant&rsquo;s receipt of consideration that increases the number of the outstanding shares of the Common Stock.</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">(2)</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Represents (i) an additional 4,400,000 shares of the Common Stock issuable under the Incentive Plan, and (ii) an additional 1,200,000 shares of the Common Stock issuable under the ESPP.</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">(3)</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Estimated solely for the purpose of calculating the registration fee. Calculated pursuant to Rules 457(c) and 457(h) under the Securities Act based on the average of the high and low prices per share of the Common Stock as reported on The Nasdaq Global Market on May 6, 2025, which was $3.93.</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>





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