Ameresco co-president sells 592 shares in plan trade

Ameresco’s Co-President reported a small Rule 10b5-1 sell-to-cover transaction tied to RSU vesting, leaving him with over thirty-three thousand shares.

Available on EDGAR 09/17/2026 - 04:41 PM EDT Accepted by SEC EDGAR 09/17/2026 - 04:40 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Ameresco, Inc. (AMRC) reported that Co-President Louis P. Maltezos sold 592 shares of Class A Common Stock on September 15, 2026 at $22.46 per share. The sale was executed under an automatic sell-to-cover instruction signed March 6, 2025 to cover applicable withholding taxes on vesting RSUs, and he held 33,628 shares afterward.

Insider Trade Summary 10b5-1

Net Seller: 592 shares

Net Sell 1 txn

Insider Maltezos Louis P

Role Co-President

Sold 592 shs ($13K)

Share of Position Sold 1.7%

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1	592	$22.46	$13K

Holdings After Transaction: Class A Common Stock — 33,628 shares (Direct)

Holdings Before and After: Class A Common Stock, 34,220 to 33,628 shares (Direct)

Other Insiders: 1 other insider reported open-market sales of this stock in the 30 days up to this filing.

Footnotes (1)

1. F1. The shares were sold pursuant to an automatic sell-to-cover instruction signed March 6, 2025 solely to cover applicable withholding taxes in connection with the vesting of RSUs.

Key Figures

Shares sold: 592 shares Sale price per share: $22.46 per share Shares held after transaction: 33,628 shares +2 more

5 metrics

Shares sold 592 shares Class A Common Stock sold on September 15, 2026

Sale price per share $22.46 per share Open market or private transaction on September 15, 2026

Shares held after transaction 33,628 shares Direct holdings of Louis P. Maltezos following the sale

Sell-to-cover shares 592 shares Sold solely to cover withholding taxes on vesting RSUs

10b5-1 plan adoption date March 6, 2025 Automatic sell-to-cover instruction signed on this date

Key Terms

sell-to-cover, withholding taxes, Rule 10b5-1, RSUs

4 terms

sell-to-cover financial

"The shares were sold pursuant to an automatic sell-to-cover instruction"

Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.

withholding taxes financial

"solely to cover applicable withholding taxes in connection with the vesting"

Withholding taxes are amounts a payer or government takes out of payments — such as wages, interest, or dividends — before the recipient gets the money, functioning like a cashier keeping part of a bill to pay taxes on your behalf. For investors this matters because it reduces the cash they actually receive, affects net returns and yield calculations, and may require additional paperwork or treaty claims to recover or offset the withheld amount against final tax bills.

Rule 10b5-1 regulatory

"transactions affirmed under a Rule 10b5-1 trading plan"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

RSUs financial

"in connection with the vesting of RSUs"

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

FAQ

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

What insider transaction did AMRC disclose for Co-President Louis P. Maltezos?

Co-President Louis P. Maltezos reported selling 592 shares of Ameresco Class A Common Stock on September 15, 2026 at $22.46 per share. The transaction was a sell-to-cover sale related to RSU vesting.

Why did the Ameresco (AMRC) Co-President sell 592 shares?

The 592 shares were sold pursuant to an automatic sell-to-cover instruction signed March 6, 2025, used solely to cover withholding taxes arising from the vesting of restricted stock units (RSUs).

Was the AMRC insider sale made under a Rule 10b5-1 plan?

Yes. The filing affirms that the reported transaction was made under a Rule 10b5-1 trading plan, specifically an automatic sell-to-cover instruction signed on March 6, 2025 for tax withholding on RSU vesting.

How many Ameresco (AMRC) shares does the Co-President hold after this transaction?

After the September 15, 2026 sell-to-cover transaction, Co-President Louis P. Maltezos directly held 33,628 shares of Ameresco Class A Common Stock.

What price did the Ameresco (AMRC) shares sell for in this Form 4 filing?

The 592 Ameresco Class A Common shares were sold at a price of $22.46 per share on September 15, 2026, as reported in the Form 4 filing for Co-President Louis P. Maltezos.

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

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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).

X

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^*

Maltezos Louis P

(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)
	Co-President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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	09/15/2026		S		592(1)	D	$22.46	33,628	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

Explanation of Responses:

1. The shares were sold pursuant to an automatic sell-to-cover instruction signed March 6, 2025 solely to cover applicable withholding taxes in connection with the vesting of RSUs.

Remarks:

	/s/ John W. Pickett, attorney-in-fact	09/17/2026
	** 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)