Ameresco COO acquires 1,750 shares via RSUs

Ameresco’s COO exercised 1,750 RSUs into Class A Common Stock, ending with 15,106 directly held shares and 3,750 remaining RSUs.

Rhea-AI Filing Summary

Ameresco, Inc. (AMRC) reported that Chief Operating Officer Peter Christakis exercised 1,750 Restricted Stock Units (RSUs) into 1,750 shares of Class A Common Stock on September 10, 2026. Each RSU represents one share of common stock and vests over two years, with 25% vesting every six months from the grant date.

Following these transactions, Christakis holds 3,750 RSUs granted at various dates and 15,106 shares of Class A Common Stock, all held directly. No Rule 10b5-1 trading plan is reported for these transactions.

Insider Trade Summary

1,750 shares exercised/converted

Exercise 2 txns

Insider Christakis Peter

Role Chief Operating Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit F1, F2, F3	1,750	$0.00	$0.00
Exercise	Class A Common Stock	1,750	$0.00	$0.00

Holdings After Transaction: Restricted Stock Unit — 3,750 contracts (Direct); Class A Common Stock — 15,106 shares (Direct)

Footnotes (3)

1. F1. Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").
2. F2. Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.
3. F3. Represents RSUs granted at various dates.

Key Figures

RSUs exercised: 1,750 units Shares acquired from RSU conversion: 1,750 shares Common shares held after transaction: 15,106 shares +3 more

6 metrics

RSUs exercised 1,750 units Restricted Stock Units converted into Class A Common Stock on September 10, 2026

Shares acquired from RSU conversion 1,750 shares Class A Common Stock received upon RSU exercise on September 10, 2026

Common shares held after transaction 15,106 shares Directly held Class A Common Stock by COO following the reported transactions

RSUs remaining after transaction 3,750 units Restricted Stock Units reported as held following the RSU exercise

RSU vesting schedule 25% every 6 months over 2 years Vesting terms for each RSU from its applicable grant date

Reported exercise price per share $0.00 per share Price field for both the RSU derivative and resulting common stock transactions

Key Terms

Restricted Stock Unit, Class A Common Stock, contingent right, vests over two years, +1 more

5 terms

Restricted Stock Unit financial

"Each RSU represents a contingent right to receive one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

Class A Common Stock financial

"receive one share of Ameresco, Inc. Class A Common Stock"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

contingent right financial

"Each RSU represents a contingent right to receive one share"

vests over two years financial

"Each RSU vests over two years with 25% vesting"

6-month anniversary financial

"25% vesting on each 6-month anniversary of the applicable grant date"

FAQ

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

What insider transaction did AMRC’s COO report on September 10, 2026?

Ameresco’s COO Peter Christakis exercised 1,750 Restricted Stock Units into 1,750 shares of Class A Common Stock on September 10, 2026, at a reported price of $0.00 per share as part of RSU vesting.

How many Ameresco (AMRC) shares does the COO hold after this Form 4?

After the reported transactions, COO Peter Christakis directly holds 15,106 shares of Ameresco Class A Common Stock, according to the Form 4 data.

How many RSUs does the Ameresco (AMRC) COO still have after the transaction?

Following the September 10, 2026 exercise, Peter Christakis has 3,750 Restricted Stock Units (RSUs) remaining, representing potential future issuances of an equal number of Ameresco Class A Common Stock shares as they vest.

What are the vesting terms of the Ameresco (AMRC) RSUs reported for the COO?

Each RSU represents a contingent right to receive one share of Ameresco Class A Common Stock and vests over two years, with 25% vesting on each 6‑month anniversary of the applicable grant date.

Were the Ameresco (AMRC) COO’s transactions under a Rule 10b5-1 trading plan?

No. The filing indicates the Rule 10b5‑1 checkbox is not marked, so no Rule 10b5‑1 trading plan is reported for these RSU exercises and resulting share acquisitions.

Did the Ameresco (AMRC) COO buy or sell shares for cash in this Form 4?

No open‑market buy or sell is reported. The Form 4 shows an RSU exercise/conversion of 1,750 units into 1,750 shares at a stated price of $0.00 per share, reflecting vesting rather than a cash transaction.

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

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Available on EDGAR 09/14/2026 - 04:46 PM Accepted by SEC EDGAR 09/14/2026 - 04:42 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Christakis Peter

(Last) (First) (Middle)

C/O AMERESCO, INC.

111 SPEEN STREET, SUITE 410

(Street)

FRAMINGHAM MASSACHUSETTS 01701

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Ameresco, Inc. [ AMRC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Operating Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/10/2026		M		1,750	A	$0	15,106	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit	(1)	09/10/2026		M			1,750	(2)	(2)	Class A Common Stock	1,750	$0	3,750(3)	D

Explanation of Responses:

1. Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").

2. Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

3. Represents RSUs granted at various dates.

Remarks:

	/s/ John W. Pickett, attorney-in-fact	09/14/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)