Grantham Mayo reports 6.67% stake in Ameresco

Grantham, Mayo, Van Otterloo & Co. LLC has filed an amended Schedule 13G reporting beneficial ownership of 2,323,792 shares of Ameresco Inc common stock, representing 6.67% of the class as of 12/31/2025.

Rhea-AI Filing Summary

Grantham, Mayo, Van Otterloo & Co. LLC has filed an amended Schedule 13G reporting beneficial ownership of 2,323,792 shares of Ameresco Inc common stock, representing 6.67% of the class as of 12/31/2025.

The firm reports sole power to vote and dispose of all reported shares, with no shared voting or dispositive power. It states the shares were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of Ameresco.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What ownership stake in Ameresco (AMRC) does Grantham, Mayo, Van Otterloo report?

Grantham, Mayo, Van Otterloo & Co. LLC reports beneficial ownership of 2,323,792 Ameresco common shares, representing 6.67% of the class. This stake is disclosed in an amended Schedule 13G as of December 31, 2025, reflecting a significant institutional holding.

What type of SEC filing did Grantham, Mayo, Van Otterloo submit for Ameresco (AMRC)?

The firm submitted an amended Schedule 13G/A for Ameresco Inc common stock. Schedule 13G is a beneficial ownership report typically used by institutional investors holding more than 5% of a class of equity securities without seeking to influence control of the issuer.

Does Grantham, Mayo, Van Otterloo seek to influence control of Ameresco (AMRC)?

The filing states the Ameresco securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control. It also notes they are not held in connection with any transaction intended to affect control, aside from certain nomination activities.

What voting and dispositive powers does Grantham, Mayo, Van Otterloo report over Ameresco (AMRC) shares?

The firm reports sole power to vote or direct the vote over 2,323,792 Ameresco shares and sole power to dispose or direct the disposition of the same number. It reports no shared voting power and no shared dispositive power over any Ameresco common stock in this filing.

As of what date is Grantham, Mayo, Van Otterloo’s Ameresco (AMRC) ownership reported?

The ownership information is reported as of December 31, 2025, which is the date of the event requiring the filing. At that date, the firm’s position in Ameresco common stock reached the disclosed 2,323,792 shares, representing 6.67% of the outstanding class.

Who signed the Ameresco (AMRC) Schedule 13G/A on behalf of Grantham, Mayo, Van Otterloo?

The Schedule 13G/A was signed by Gregory L. Pottle, identified as Chief Compliance Officer of Grantham, Mayo, Van Otterloo & Co. LLC. The signature section certifies, after reasonable inquiry, that the information in the statement is true, complete, and correct.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/10/2026 - 01:30 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

Ameresco Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

02361E108

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 02361E108

1

Names of Reporting Persons

Grantham, Mayo, Van Otterloo & Co. LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MASSACHUSETTS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 2,323,792.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,323,792.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,323,792.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.67 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Ameresco Inc
(b)	Address of issuer's principal executive offices: 111 Speen Street, Framingham, MA, 01701
Item 2.
(a)	Name of person filing: Grantham, Mayo, Van Otterloo & Co. LLC
(b)	Address or principal business office or, if none, residence: 53 State Street, Suite 3300, Boston, MA, 02109
(c)	Citizenship: USA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 02361E108
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2323792
(b)	Percent of class: 6.67 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 2323792
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2323792
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

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 § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Grantham, Mayo, Van Otterloo & Co. LLC

Signature:	Gregory L. Pottle
Name/Title:	Chief Compliance Officer
Date:	02/10/2026