Ameresco EVP and General Counsel Corrsin Retires

Ameresco, Inc. (AMRC) announced that on August 17, 2026, David J. Corrsin, age 68, resigned as a Class II director, effective immediately.

Rhea-AI Filing Summary

Ameresco, Inc. (AMRC) announced that on August 17, 2026, David J. Corrsin, age 68, resigned as a Class II director, effective immediately. His resignation coincides with his retirement from the roles of Executive Vice President and General Counsel, also effective August 17, 2026.

Ameresco states that Mr. Corrsin’s resignation was not due to any disagreement regarding the company’s operations, policies, or practices. He has served as a director since the company’s formation in 2000 and will continue with Ameresco as its Special Legal Advisor, allowing the company to retain his experience and institutional knowledge.

8-K Event Classification

Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers

1 item

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance

Key personnel changes including departures, elections, or appointments of directors and executive officers.

Key Figures

Effective resignation and retirement date: August 17, 2026 Age of departing director: 68 Service as director since: 2000 +1 more

4 metrics

Effective resignation and retirement date August 17, 2026 Date David J. Corrsin resigned as Class II director and retired as EVP and General Counsel

Age of departing director 68 Age of David J. Corrsin at the time of his resignation and retirement

Service as director since 2000 Year David J. Corrsin began serving as a director of Ameresco

Report signature date August 19, 2026 Date the CEO signed the report documenting the leadership changes

Key Terms

Class II director, Executive Vice President, General Counsel, Special Legal Advisor

4 terms

Class II director regulatory

"resigned from his position as a Class II director of the Company"

A class II director is a member of a company’s board who belongs to one of several staggered groups of directors, each group standing for election in different years. For investors, this matters because staggered terms slow wholesale board turnover—like rotating members of a neighborhood committee—making sudden changes in control or strategy harder and affecting how quickly shareholders can influence corporate direction.

Executive Vice President financial

"retiring from the position as Executive Vice President and General Counsel"

An executive vice president is a high-ranking leader within a company who oversees major parts of its operations or strategies. Think of them as senior managers responsible for important areas, similar to a vice principal in a school hierarchy. Their role matters to investors because they help guide the company's success and decision-making at the top level.

General Counsel regulatory

"retiring from the position as Executive Vice President and General Counsel"

A general counsel is the chief lawyer of an organization, responsible for overseeing all legal matters and ensuring the company complies with laws and regulations. Think of them as the organization's legal advisor or navigator, helping to prevent legal problems before they happen. Their role matters to investors because they help protect the company from legal risks that could impact its success and value.

Special Legal Advisor regulatory

"will continue to serve as the Company's Special Legal Advisor"

FAQ

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

What leadership change did Ameresco (AMRC) announce on August 17, 2026?

Ameresco announced that David J. Corrsin resigned as a Class II director and retired as Executive Vice President and General Counsel, effective August 17, 2026. He will remain with the company as Special Legal Advisor.

Why did David J. Corrsin resign from Ameresco’s (AMRC) board?

Ameresco states that Mr. Corrsin’s resignation was in connection with his retirement from his executive roles and was not the result of any disagreement regarding the company’s operations, policies, or practices.

Will David J. Corrsin continue to work with Ameresco (AMRC) after his retirement?

Yes. After retiring as Executive Vice President and General Counsel, Mr. Corrsin will continue to serve as Ameresco’s Special Legal Advisor, allowing the company to continue benefiting from his legal experience.

How long has David J. Corrsin been associated with Ameresco (AMRC)?

Mr. Corrsin has served as a director of Ameresco since the company’s formation in 2000. His departure from the board in 2026 ends more than two decades of board service, though he remains as Special Legal Advisor.

What positions did David J. Corrsin hold at Ameresco (AMRC) before retiring?

Before retiring, Mr. Corrsin, age 68, served as a Class II director, as well as Executive Vice President and General Counsel. All these roles ended effective August 17, 2026, when he transitioned to Special Legal Advisor.

Who signed the Ameresco (AMRC) report announcing David Corrsin’s resignation?

The report was signed on behalf of Ameresco by George P. Sakellaris, the company’s Chief Executive Officer, dated August 19, 2026, confirming the disclosed leadership changes.

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

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Accepted by SEC EDGAR 08/19/2026 - 04:33 PM EDT Learn about SEC filing dates

FALSE000148813900014881392026-07-222026-07-22

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 17, 2026

Ameresco, Inc.

(Exact Name of Registrant as Specified in Charter)

Delaware

001-34811

04-3512838

(State or Other Juris- diction of Incorporation)

(Commission File Number)

(IRS Employer Identification No.)

111 Speen Street,

Suite 410,

Framingham,

MA

01701

(Address of Principal Executive Offices)

(Zip Code)

Registrant’s telephone number, including area code: (508) 661-2200

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐						Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐						Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐						Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐						Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class			Trading Symbol			Name of exchange on which registered
Class A Common Stock, par value $0.0001 per share			AMRC			New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1033 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company

☐

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 13(a) of the Exchange Act.

☐

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On August 17, 2026, David J. Corrsin, 68, resigned from his position as a Class II director of the Company, effective immediately, in connection with retiring from the position as Executive Vice President and General Counsel, also effective August 17, 2026. Following his retirement, Mr. Corrsin will continue to serve as the Company's Special Legal Advisor.

Mr. Corrsin has served as a director of the Company since its formation in 2000. The Company thanks Mr. Corrsin for his many years of dedicated service and guidance as a member of the board of directors and looks forward to continuing to benefit from his experience in his role as Special Legal Advisor.

Mr. Corrsin’s resignation was not the result of any disagreement with the Company regarding its operations, policies, or practices.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

AMERESCO, INC.

August 19, 2026

By:

/s/ George P. Sakellaris

George P. Sakellaris

Chief Executive Officer

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