Sakellaris George P. - 10 Mar 2026 Form 4 Insider Report for Ameresco, Inc. (AMRC)

Role: President and CEO, Director, 10%+ Owner
Signature: /s/ David J. Corrsin, attorney-in-fact
Issuer symbol: AMRC
Transactions as of: 10 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 12 Mar 2026, 20:40:06 UTC
Previous filing: 12 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Sakellaris George P	President and CEO, Director, 10%+ Owner	C/O AMERESCO, INC., 111 SPEEN STREET, SUITE 410, FRAMINGHAM	/s/ David J. Corrsin, attorney-in-fact	12 Mar 2026	0001496665

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMRC	Class A Common Stock	Options Exercise		+3,750	+0.38%	$0.000000^*	988,597	10 Mar 2026	Direct
holding	AMRC	Class A Common Stock						200,000	10 Mar 2026	By spouse	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AMRC	Stock Option (right to purchase)	Award		+100,000		$0.000000^*	100,000	10 Mar 2026	Class A Common Stock	100,000	$26.36	Direct	F2
transaction	AMRC	Restricted Stock Unit	Award		+10,000	+89%	$0.000000^*	21,250	10 Mar 2026	Class A Common Stock	10,000		Direct	F3, F4
transaction	AMRC	Restricted Stock Unit	Options Exercise		-3,750	-18%	$0.000000^*	17,500	10 Mar 2026	Class A Common Stock	3,750		Direct	F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The reporting person disclaims beneficial ownership of the shares held by his spouse, and this report should not be deemed an admission that the reporting person is the beneficial owner of his spouse's shares for purposes of Section 16 or for any other purpose.
F2	Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.
F3	Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").
F4	Each RSUs represents a contingent right to receive one share of Common Stock and vest over two years with 25% vesting on each 6-month anniversary of the applicable grant date.