<SEC-DOCUMENT>0001352662-25-000049.txt : 20251105
<SEC-HEADER>0001352662-25-000049.hdr.sgml : 20251105
<ACCEPTANCE-DATETIME>20251105134218
ACCESSION NUMBER:		0001352662-25-000049
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251105
DATE AS OF CHANGE:		20251105

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:		251453222

	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:			Grantham, Mayo, Van Otterloo & Co. LLC
		CENTRAL INDEX KEY:			0001352662
		ORGANIZATION NAME:           	
		EIN:				042691242
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		53 STATE STREET, SUITE 3300
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
		BUSINESS PHONE:		617-330-7500

	MAIL ADDRESS:	
		STREET 1:		53 STATE STREET, SUITE 3300
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
</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>
<cik>0001352662</cik>
<ccc>XXXXXXXX</ccc>
</filerCredentials>
</filer>
<liveTestFlag>LIVE</liveTestFlag>
</filerInfo>
</headerData>
<formData>
<coverPageHeader>
<amendmentNo>3</amendmentNo>
<securitiesClassTitle>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 Suite 410</com:street1>
<com:city>Framingham</com:city>
<com:stateOrCountry>MA</com:stateOrCountry>
<com:zipCode>01701</com:zipCode>
</issuerPrincipalExecutiveOfficeAddress>
</issuerInfo>
<designateRulesPursuantThisScheduleFiled>
<designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
</designateRulesPursuantThisScheduleFiled>
</coverPageHeader>
<coverPageHeaderReportingPersonDetails>
<reportingPersonName>Grantham, Mayo, Van Otterloo &amp; Co. LLC</reportingPersonName>
<citizenshipOrOrganization>MA</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>3203393</soleVotingPower>
<sharedVotingPower>0</sharedVotingPower>
<soleDispositivePower>3203393</soleDispositivePower>
<sharedDispositivePower>0</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>3203393</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<classPercent>9.23</classPercent>
<typeOfReportingPerson>IA</typeOfReportingPerson>
</coverPageHeaderReportingPersonDetails>
<items>
<item1>
<issuerName>Ameresco Inc</issuerName>
<issuerPrincipalExecutiveOfficeAddress>111 Speen Street Suite 410, Framingham, MA, 01701</issuerPrincipalExecutiveOfficeAddress>
</item1>
<item2>
<filingPersonName>Grantham, Mayo, Van Otterloo &amp; Co. LLC</filingPersonName>
<principalBusinessOfficeOrResidenceAddress>53 State Street, Suite 3300, Boston, MA, 02109</principalBusinessOfficeOrResidenceAddress>
<citizenship>USA</citizenship>
</item2>
<item3>
<notApplicableFlag>N</notApplicableFlag>
<typeOfPersonFiling>IA</typeOfPersonFiling>
</item3>
<item4>
<amountBeneficiallyOwned>3203393</amountBeneficiallyOwned>
<classPercent>9.23</classPercent>
<numberOfSharesPersonHas>
<solePowerOrDirectToVote>3203393</solePowerOrDirectToVote>
<sharedPowerOrDirectToVote>0</sharedPowerOrDirectToVote>
<solePowerOrDirectToDispose>3203393</solePowerOrDirectToDispose>
<sharedPowerOrDirectToDispose>0</sharedPowerOrDirectToDispose>
</numberOfSharesPersonHas>
</item4>
<item5>
<notApplicableFlag>Y</notApplicableFlag>
</item5>
<item6>
<notApplicableFlag>Y</notApplicableFlag>
</item6>
<item7>
<notApplicableFlag>Y</notApplicableFlag>
</item7>
<item8>
<notApplicableFlag>Y</notApplicableFlag>
</item8>
<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 acquired and are held in the ordinary course of business and 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 &amp;#167; 240.14a-11.</certifications>
</item10>
</items>
<signatureInformation>
<reportingPersonName>Grantham, Mayo, Van Otterloo &amp; Co. LLC</reportingPersonName>
<signatureDetails>
<signature>Gregory L. Pottle</signature>
<title>Chief Compliance Officer</title>
<date>11/05/2025</date>
</signatureDetails>
</signatureInformation>
</formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
