Insider Transactions Reported by 20 Insiders of Ameresco, Inc.

Symbol: AMRC on NYSE
Location: Framingham, MA

Quick Takeaways

AMRC - Ameresco, Inc. has 20 insiders with reported activity on this page.
Net insider value flow over the last year: -$2,420,891.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: ; sell value: $2,420,891.
Net share flow: -62,701.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Source Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to selling over the last 12 months. Net value: -$2,420,891.

Buys

Shares: 0

Insiders: 0

Sells

$2,420,891

Shares: 62,701

Insiders: 4

Net

-$2,420,891

Shares: -62,701

Insiders: -4

Window (months)	Sell shares	Buy $	Sell $	Net $
0-3	17,193	$0	$581,350	-$581,350
3-6	100	$0	$3,400	-$3,400
6-9	45,408	$0	$1,836,142	-$1,836,142
9-12	0	$0	$0	$0

Ameresco, Inc. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Sakellaris George P.	President and CEO, Director, 10%+ Owner	$34,931,648			Mixed	10 Mar 2026
Joseph W. Sutton	Director	$3,475,812			Mixed	23 Apr 2026
Nicole E. Bulgarino	President - Federal & Utility	$1,770,770			Mixed	10 Mar 2026
Louis P. Maltezos	President-Central&West USA Can	$854,044	-$7,745	-0.9%	Mixed	10 Mar 2026
David J. Corrsin	EVP and General Counsel, Director	$613,208	-$2,844	-0.46%	Mixed	10 Mar 2026
Nickolas Stavropoulos	Director	$481,890	-$568,297	-54%	Filing P/S	19 Feb 2026
Bakas Michael T.	President - Renewable Fuels	$440,650			Mixed	10 Mar 2026
Peter Christakis	President-EastUSA, ProjectRisk	$421,456			Mixed	10 Mar 2026
Francis V Wisneski Jr.	Director	$367,630			Mixed	04 Jun 2025
Jennifer L. Miller	Director	$322,157			Mixed	04 Jun 2025
Britta MacIntosh	Senior Vice President	$291,115			Mixed	17 Sep 2023
Charles R. Patton	Director	$195,077			Mixed	04 Jun 2025
Claire D'Oyly-Hughes Johnson	Director	$173,543			Mixed	04 Jun 2025
David Anderson	Executive Vice President, Director	$167,000			Mixed	14 Jun 2021
Mark Chiplock	Evp, Cfo & Cao	$77,926	-$1,842,006	-96%	Mixed	10 Mar 2026
Spencer Doran Hole	EVP and CFO	$61,936			Mixed	12 Aug 2024
Douglas I. Foy	Director	$18,061			Mixed	04 Nov 2022
Thomas S. Murley	Director				Mixed	04 Mar 2022
Robert Georgeoff	Executive Vice President				Mixed	04 Mar 2022
Lauren Todd	SVP - HR and Operations				Mixed	04 Mar 2022

Top shareholders of Ameresco, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Sakellaris George P.	13D/G 3/4/5	President and CEO, Director, 10%+ Owner	40%	20,723,638	$208,479,798	$0	31 Dec 2024	13D/G 3/4/5
WELLINGTON MANAGEMENT GROUP LLP	13F 13D/G	Company	11% from 13D/G	3,901,333	$114,270,044	—	31 Dec 2025	13F 13D/G
BlackRock, Inc.	13F	Company	7.1%	2,466,764	$72,251,532	—	31 Dec 2025	13F
VANGUARD GROUP INC	13F	Company	6.9%	2,414,838	$70,730,606	—	31 Dec 2025	13F
Grantham, Mayo, Van Otterloo & Co. LLC	13F 13D/G	Company	6.7% from 13D/G	2,323,792	$68,063,868	—	31 Dec 2025	13F 13D/G
GAGNON SECURITIES LLC	13D/G 13F	Neil Gagnon · Company	4.9%	1,717,344	$57,668,412	$0	30 Sep 2025	13D/G 13F
STATE STREET CORP	13F	Company	3.8%	1,324,494	$38,794,429	—	31 Dec 2025	13F
D. E. Shaw & Co., Inc.	13F	Company	3.7%	1,277,177	$37,408,515	—	31 Dec 2025	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	3.7%	1,272,601	$37,274,438	—	31 Dec 2025	13F
ROYCE & ASSOCIATES LP	13F	Company	3.1%	1,066,792	$31,246,338	—	31 Dec 2025	13F
FIRST TRUST ADVISORS LP	13F	Company	3.1%	1,066,571	$31,239,864	—	31 Dec 2025	13F
Granahan Investment Management, LLC	13F	Company	2.4%	848,007	$24,838,125	—	31 Dec 2025	13F
DnB Asset Management AS	13F	Company	2.3%	785,043	$22,993,909	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	2.2%	762,226	$22,329,509	—	31 Dec 2025	13F
Handelsbanken Fonder AB	13F 13D/G	Company	4.9% from 13D/G	650,836	$19,063,000	—	31 Dec 2025	13F 13D/G
ROYAL BANK OF CANADA	13F	Company	1.7%	599,551	$17,560,000	—	31 Dec 2025	13F
Neil Gagnon	13D/G	—	5%	1,738,193	$17,486,222	$0	03 Mar 2025	13D/G
MORGAN STANLEY	13F	Company	1.7%	583,754	$17,098,174	—	31 Dec 2025	13F
First Eagle Investment Management, LLC	13F	Company	1.6%	574,673	$16,832,172	—	31 Dec 2025	13F
Bandera Partners LLC	13F	Company	1.5%	526,769	$15,429,064	—	31 Dec 2025	13F
DRIEHAUS CAPITAL MANAGEMENT LLC	13F	Company	1.4%	504,658	$14,781,433	—	31 Dec 2025	13F
Redwood Grove Capital, LLC	13F	Company	1.4%	492,625	$14,428,986	—	31 Dec 2025	13F
Invesco Ltd.	13F	Company	1.4%	472,949	$13,852,675	—	31 Dec 2025	13F
Gagnon Advisors, LLC	13F	Company	1.4%	472,798	$13,848,253	—	31 Dec 2025	13F
Legal & General Group Plc	13F	Company	1.3%	467,562	$13,694,889	—	31 Dec 2025	13F
UBS Group AG	13F	Company	1.1%	397,386	$11,639,436	—	31 Dec 2025	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	1.1%	395,175	$11,574,676	—	31 Dec 2025	13F
COOPER CREEK PARTNERS MANAGEMENT LLC	13F	Company	1.1%	391,957	$11,480,000	—	31 Dec 2025	13F
Swedbank AB	13F	Company	1.1%	370,000	$10,837,300	—	31 Dec 2025	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	1%	354,404	$10,380,493	—	31 Dec 2025	13F
SILVERCREST ASSET MANAGEMENT GROUP LLC	13F	Company	0.99%	344,840	$10,100,364	—	31 Dec 2025	13F
FIRST TRUST PORTFOLIOS LP	13D/G	First Trust Portfolios L.P.	0.78%	270,136	$9,071,167	-$53,793,985	30 Sep 2025	13D/G
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.75%	261,567	$7,661,297	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.75%	261,319	$7,654,033	—	31 Dec 2025	13F
Russell Investments Group, Ltd.	13F	Company	0.64%	222,261	$6,510,049	—	31 Dec 2025	13F
TUDOR INVESTMENT CORP ET AL	13F	Company	0.64%	222,120	$6,505,895	—	31 Dec 2025	13F
Rock Point Advisors, LLC	13F	Company	0.55%	191,787	$5,617,441	—	31 Dec 2025	13F
Guinness Asset Management LTD	13F	Company	0.53%	185,249	$5,570,437	—	31 Dec 2025	13F
Trexquant Investment LP	13F	Company	0.54%	188,520	$5,521,751	—	31 Dec 2025	13F
JANE STREET GROUP, LLC	13F	Company	0.44%	154,875	$4,536,289	—	31 Dec 2025	13F
Deutsche Girozentrale DekaBank	13F	Individual	0.53%	184,935	$4,398,000	—	31 Dec 2025	13F
SG Americas Securities, LLC	13F	Company	0.41%	142,020	$4,160,000	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.39%	136,089	$3,986,047	—	31 Dec 2025	13F
Erste Asset Management GmbH	13F	Company	0.38%	132,189	$3,974,923	—	31 Dec 2025	13F
BNP PARIBAS FINANCIAL MARKETS	13F	Company	0.37%	128,402	$3,760,895	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.37%	127,988	$3,748,769	—	31 Dec 2025	13F
CONNORS INVESTOR SERVICES INC	13F	Company	0.36%	125,409	$3,673,230	—	31 Dec 2025	13F
Bank of New York Mellon Corp	13F	Company	0.34%	119,268	$3,493,371	—	31 Dec 2025	13F
Joseph W. Sutton	3/4/5	Director	0.56%	193,466	$3,475,812	—	23 Apr 2026	3/4/5
KBC Group NV	13F	Company	0.28%	97,014	$2,842,000	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for Ameresco, Inc.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Joseph W. Sutton	AMRC	Class A Common Stock	Options Exercise	20%			10,000	60,111	23 Apr 2026	Direct
Joseph W. Sutton	AMRC	Stock Option (right to purchase)	Options Exercise	-100%			-10,000	0	23 Apr 2026	Direct
Mark Chiplock	AMRC	Class A Common Stock	Sale	-14.1%	$6,910	$25.31	-273	1,666	12 Mar 2026	Direct
Louis P. Maltezos	AMRC	Class A Common Stock	Sale	-0.94%	$7,745	$25.31	-306	32,095	12 Mar 2026	Direct
David J. Corrsin	AMRC	Class A Common Stock	Sale	-4.13%	$481	$25.31	-19	441	12 Mar 2026	By Spouse
George P. Sakellaris	AMRC	Class A Common Stock	Options Exercise	0.38%			3,750	988,597	10 Mar 2026	Direct
George P. Sakellaris	AMRC	Restricted Stock Unit	Options Exercise	-17.6%			-3,750	17,500	10 Mar 2026	Direct
George P. Sakellaris	AMRC	Restricted Stock Unit	Award	88.9%			10,000	21,250	10 Mar 2026	Direct
George P. Sakellaris	AMRC	Stock Option (right to purchase)	Award				100,000	100,000	10 Mar 2026	Direct
Nicole E. Bulgarino	AMRC	Class A Common Stock	Options Exercise	1.5%			875	59,296	10 Mar 2026	Direct
Nicole E. Bulgarino	AMRC	Restricted Stock Unit	Options Exercise	-13.2%			-875	5,750	10 Mar 2026	Direct
Nicole E. Bulgarino	AMRC	Restricted Stock Unit	Award	152.4%			4,000	6,625	10 Mar 2026	Direct
Nicole E. Bulgarino	AMRC	Stock Option (right to purchase)	Award				20,000	20,000	10 Mar 2026	Direct
Mark Chiplock	AMRC	Class A Common Stock	Options Exercise	63.1%			750	1,939	10 Mar 2026	Direct
Mark Chiplock	AMRC	Restricted Stock Unit	Options Exercise	-13%			-750	5,000	10 Mar 2026	Direct
Mark Chiplock	AMRC	Restricted Stock Unit	Award	155.6%			3,500	5,750	10 Mar 2026	Direct
Mark Chiplock	AMRC	Stock Option (right to purchase)	Award				20,000	20,000	10 Mar 2026	Direct
Bakas Michael T.	AMRC	Class A Common Stock	Options Exercise	6.86%			875	13,634	10 Mar 2026	Direct
Bakas Michael T.	AMRC	Restricted Stock Unit	Options Exercise	-13.2%			-875	5,750	10 Mar 2026	Direct
Bakas Michael T.	AMRC	Restricted Stock Unit	Award	152.4%			4,000	6,625	10 Mar 2026	Direct
Bakas Michael T.	AMRC	Stock Option (right to purchase)	Award				20,000	20,000	10 Mar 2026	Direct
Louis P. Maltezos	AMRC	Class A Common Stock	Options Exercise	2.78%			875	32,401	10 Mar 2026	Direct
Louis P. Maltezos	AMRC	Restricted Stock Unit	Options Exercise	-11.5%			-875	6,750	10 Mar 2026	Direct
Louis P. Maltezos	AMRC	Restricted Stock Unit	Award	190.5%			5,000	7,625	10 Mar 2026	Direct
Louis P. Maltezos	AMRC	Stock Option (right to purchase)	Award				20,000	20,000	10 Mar 2026	Direct
David J. Corrsin	AMRC	Class A Common Stock	Options Exercise	12.2%			50	460	10 Mar 2026	By Spouse
David J. Corrsin	AMRC	Restricted Stock Unit	Options Exercise	-10%			-50	450	10 Mar 2026	By spouse
David J. Corrsin	AMRC	Restricted Stock Unit	Award	233.3%			350	500	10 Mar 2026	By spouse
David J. Corrsin	AMRC	Stock Option (right to purchase)	Award				4,000	4,000	10 Mar 2026	By spouse
David J. Corrsin	AMRC	Restricted Stock Unit	Award				3,500	3,500	10 Mar 2026	Direct
David J. Corrsin	AMRC	Stock Option (right to purchase)	Award				20,000	20,000	10 Mar 2026	Direct
Peter Christakis	AMRC	Class A Common Stock	Options Exercise	5.95%			750	13,356	10 Mar 2026	Direct
Peter Christakis	AMRC	Restricted Stock Unit	Options Exercise	-12%			-750	5,500	10 Mar 2026	Direct
Peter Christakis	AMRC	Restricted Stock Unit	Award	177.8%			4,000	6,250	10 Mar 2026	Direct
Peter Christakis	AMRC	Stock Option (right to purchase)	Award				20,000	20,000	10 Mar 2026	Direct
David J. Corrsin	AMRC	Class A Common Stock	Sale	-11.7%	$1,317	$26.34	-50	379	10 Mar 2026	By Spouse
David J. Corrsin	AMRC	Class A Common Stock	Options Exercise	13.2%			50	429	08 Mar 2026	By Spouse
David J. Corrsin	AMRC	Restricted Stock Unit	Options Exercise	-25%			-50	150	08 Mar 2026	By spouse
David J. Corrsin	AMRC	Class A Common Stock	Options Exercise	4246.3%			20,000	20,471	27 Feb 2026	Direct
David J. Corrsin	AMRC	Stock Option (right to purchase)	Options Exercise	-100%			-20,000	0	27 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Class A Common Stock	Sale	-52.7%	$536,155	$34.15	-15,700	14,111	20 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Class A Common Stock	Options Exercise	111.3%			15,700	29,811	20 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Stock Option (right to purchase)	Options Exercise	-68.1%			-15,700	7,355	20 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Class A Common Stock	Sale	-2.76%	$13,600	$34.00	-400	14,111	19 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Class A Common Stock	Options Exercise	2.83%			400	14,511	19 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Stock Option (right to purchase)	Options Exercise	-1.71%			-400	23,055	19 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Class A Common Stock	Sale	-1.71%	$8,342	$34.05	-245	14,111	13 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Class A Common Stock	Options Exercise	1.74%			245	14,356	13 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Stock Option (right to purchase)	Options Exercise	-1.03%			-245	23,455	13 Feb 2026	Direct
Nickolas Stavropoulos	AMRC	Class A Common Stock	Sale	-1.4%	$6,800	$34.00	-200	14,111	12 Feb 2026	Direct

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