<SEC-DOCUMENT>0001019056-25-000225.txt : 20251024
<SEC-HEADER>0001019056-25-000225.hdr.sgml : 20251024
<ACCEPTANCE-DATETIME>20251024160215
ACCESSION NUMBER:		0001019056-25-000225
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251024
DATE AS OF CHANGE:		20251024

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ameresco, Inc.
		CENTRAL INDEX KEY:			0001488139
		STANDARD INDUSTRIAL CLASSIFICATION:	CONSTRUCTION SPECIAL TRADE CONTRACTORS [1700]
		ORGANIZATION NAME:           	05 Real Estate & Construction
		EIN:				043512838
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-85991
		FILM NUMBER:		251416138

	BUSINESS ADDRESS:	
		STREET 1:		111 SPEEN STREET
		CITY:			FRAMINGHAM
		STATE:			MA
		ZIP:			01701
		BUSINESS PHONE:		508-661-2200

	MAIL ADDRESS:	
		STREET 1:		111 SPEEN STREET
		CITY:			FRAMINGHAM
		STATE:			MA
		ZIP:			01701

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GAGNON SECURITIES LLC
		CENTRAL INDEX KEY:			0001125725
		ORGANIZATION NAME:           	
		EIN:				134087058
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		1370 AVENUE OF THE AMERICAS
		STREET 2:		26TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		212-554-5000

	MAIL ADDRESS:	
		STREET 1:		1370 AVENUE OF THE AMERICAS
		STREET 2:		26TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13g" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>SCHEDULE 13G/A</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <!-- Field: Pseudo-Tag; ID: Name; Data: GAGNON SECURITIES LLC -->
          <cik>0001125725</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>1</amendmentNo>
      <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>09/30/2025</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0001488139</issuerCik>
        <issuerName>Ameresco, Inc.</issuerName>
        <issuerCusip>02361E108</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <com:street1>111 Speen Street</com:street1>
          <com:city>Framingham</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01701</com:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(c)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>Gagnon Securities LLC</reportingPersonName>
      <memberGroup>b</memberGroup>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>0.00</soleVotingPower>
        <sharedVotingPower>920138.00</sharedVotingPower>
        <soleDispositivePower>0.00</soleDispositivePower>
        <sharedDispositivePower>964139.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>964139.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>2.8</classPercent>
      <typeOfReportingPerson>BD</typeOfReportingPerson>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>Gagnon Advisors, LLC</reportingPersonName>
      <memberGroup>b</memberGroup>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>0.00</soleVotingPower>
        <sharedVotingPower>472798.00</sharedVotingPower>
        <soleDispositivePower>0.00</soleDispositivePower>
        <sharedDispositivePower>472798.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>472798.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>1.4</classPercent>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>Neil Gagnon</reportingPersonName>
      <memberGroup>b</memberGroup>
      <citizenshipOrOrganization>X1</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>153541.00</soleVotingPower>
        <sharedVotingPower>1511094.00</sharedVotingPower>
        <soleDispositivePower>153541.00</soleDispositivePower>
        <sharedDispositivePower>1563803.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>1717344.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>4.9</classPercent>
      <typeOfReportingPerson>IN</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>Ameresco, Inc.</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>111 Speen Street, Framingham, Massachusetts 01701</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>Neil Gagnon has sole voting and dispositive power over 153,541 shares of the Issuer's Class A Common Stock (the "Common Stock").  In addition, Mr. Gagnon has shared voting power over 1,511,094 shares of Common Stock and shared dispositive power over 1,563,803 shares of Common Stock.

Mr. Gagnon is the managing member and principal owner of Gagnon Securities LLC ("GS"), an investment adviser registered with the U.S. Securities and Exchange Commission ("SEC") under the Investment Advisers Act of 1940, as amended (the "Advisers Act"), and a registered broker-dealer, in its role as investment manager to several customer accounts, foundations, partnerships and trusts (collectively, the "Accounts") to which it furnishes investment advice. GS and Mr. Gagnon may be deemed to share voting power with respect to 920,138 shares of Common Stock held in the Accounts and dispositive power with respect to 964,139 shares of Common Stock held in the Accounts. GS and Mr. Gagnon expressly disclaim beneficial ownership of all securities held in the Accounts.

Mr. Gagnon is also the Chief Executive Officer of Gagnon Advisors, LLC ("Gagnon Advisors"), an investment adviser registered with the SEC under the Advisers Act. Mr. Gagnon and Gagnon Advisors, in its role as investment manager to Gagnon Investment Associates, LLC ("GIA"), a private investment fund, may be deemed to share voting and dispositive power with respect to the 472,798 shares of Common Stock held by GIA. Gagnon Advisors and Mr. Gagnon expressly disclaim beneficial ownership of all securities held by GIA.</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>1370 Ave. of Americas, 26th Floor, New York, NY 10019</principalBusinessOfficeOrResidenceAddress>
        <citizenship>Gagnon Securities LLC   Delaware limited liability company

Gagnon Advisors, LLC    Delaware limited liability company

Neil Gagnon                    USA</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>Y</notApplicableFlag>
      </item3>
      <item4>
        <amountBeneficiallyOwned>Gagnon Securities LLC    964,139

Gagnon Advisors, LLC     472,798

Neil Gagnon                    1,717,344</amountBeneficiallyOwned>
        <classPercent>Gagnon Securities LLC  2.8%

Gagnon Advisors, LLC   1.4%

Neil Gagnon                   4.9%

Calculation of percentage of beneficial ownership is based on 34,703,659 Common Stock outstanding as of August 1, 2025, based on the Issuer's Form 10-Q filed with the Securities and Exchange Commission on August 5, 2025.</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>Gagnon Securities LLC   0

Gagnon Advisors, LLC    0

Neil Gagnon                   153,541</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>Gagnon Securities LLC  920,138

Gagnon Advisors, LLC   472,798

Neil Gagnon                   1,511,094</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>Gagnon Securities LLC   0

Gagnon Advisors, LLC    0

Neil Gagnon                   153,541</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>Gagnon Securities LLC   964,139

Gagnon Advisors, LLC    472,798

Neil Gagnon                   1,563,803</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>N</notApplicableFlag>
        <classOwnership5PercentOrLess>Y</classOwnership5PercentOrLess>
      </item5>
      <item6>
        <notApplicableFlag>N</notApplicableFlag>
        <ownershipMoreThan5PercentOnBehalfOfAnotherPerson>[ ] Not Applicable

The Accounts described above in Item 2 have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, securities held in their respective accounts. To the knowledge of the Reporting Persons, the interest in any such account does not exceed 5% of the class of securities. Except to the extent described herein, the Reporting Person disclaims beneficial ownership of all such securities.</ownershipMoreThan5PercentOnBehalfOfAnotherPerson>
      </item6>
      <item7>
        <notApplicableFlag>Y</notApplicableFlag>
      </item7>
      <item9>
        <notApplicableFlag>Y</notApplicableFlag>
      </item9>
      <item10>
        <notApplicableFlag>N</notApplicableFlag>
        <certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.</certifications>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>Gagnon Securities LLC</reportingPersonName>
      <signatureDetails>
        <signature>/s/ Neil Gagnon</signature>
        <title>Neil Gagnon/Managing Member</title>
        <date>10/24/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>Gagnon Advisors, LLC</reportingPersonName>
      <signatureDetails>
        <signature>/s/ Neil Gagnon</signature>
        <title>Neil Gagnon/Chief Executive Officer</title>
        <date>10/24/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>Neil Gagnon</reportingPersonName>
      <signatureDetails>
        <signature>/s/ Neil Gagnon</signature>
        <title>Neil Gagnon</title>
        <date>10/24/2025</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
</edgarSubmission>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
