Montrose Environmental Group (MEG) CSO exercises options, sells 7,858 shares

Rhea-AI Filing Summary

Montrose Environmental Group Chief Strategy Officer Jose Revuelta exercised stock options for 7,858 shares of common stock at an exercise price of $6.03 per share and on the same day sold 7,858 shares at $27.00 per share in an open-market transaction. After these transactions, he directly holds 269,282 shares of Montrose Environmental Group common stock.

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

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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^*

Revuelta Jose

(Last) (First) (Middle)

5120 NORTHSHORE DR

(Street)

NORTH LITTLE ROCK AR 72118

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Montrose Environmental Group, Inc. [ MEG ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

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

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

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

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
Common Stock	03/09/2026		M		7,858	A	$6.03	277,140	D
Common Stock	03/09/2026		S		7,858	D	$27	269,282	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
Stock Option (Right to Buy)	$6.03	03/09/2026		M			7,858	(1)	06/23/2026	Common Stock	7,858	$0	27,349	D

Explanation of Responses:

1. 50% of the shares subject to the option vested on June 9, 2017 and the remaining 50% vested on June 9, 2019.

	/s/ Nasym Afsari, Attorney in Fact	03/11/2026
	** 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.

FAQ

What insider transactions did Montrose Environmental Group (MEG) report for Jose Revuelta?

Montrose Environmental Group reported that Chief Strategy Officer Jose Revuelta exercised stock options for 7,858 common shares at an exercise price of $6.03 and sold 7,858 common shares at $27.00 per share in an open-market transaction, all dated March 9, 2026.

How many Montrose Environmental Group (MEG) shares does Jose Revuelta hold after this Form 4?

After the reported option exercise and share sale, Chief Strategy Officer Jose Revuelta directly holds 269,282 shares of Montrose Environmental Group common stock. This figure reflects his position following both the derivative option exercise and the corresponding open-market sale reported on March 9, 2026.

What type of derivative security did Jose Revuelta exercise at Montrose Environmental Group (MEG)?

Jose Revuelta exercised a stock option, described as a “Stock Option (Right to Buy),” covering 7,858 underlying shares of Montrose Environmental Group common stock at an exercise price of $6.03 per share, with the option originally vesting in tranches in 2017 and 2019.

Was the Montrose Environmental Group (MEG) insider transaction an open-market sale?

Yes. The Form 4 classifies Jose Revuelta’s disposition of 7,858 shares of Montrose Environmental Group common stock as an open-market sale, coded “S,” at a reported sale price of $27.00 per share on March 9, 2026, following his related stock option exercise.

Did Jose Revuelta acquire or sell shares in net terms in this Montrose (MEG) filing?

In net terms, the Form 4 shows a net sale of 7,858 shares. He exercised options to acquire 7,858 shares and then sold 7,858 shares, with the transaction summary indicating net-sell direction of 7,858 shares based on the reported activity.

What vesting information is disclosed about Jose Revuelta’s Montrose (MEG) stock options?

A footnote explains that 50% of the shares subject to the stock option vested on June 9, 2017, and the remaining 50% vested on June 9, 2019. This vesting schedule relates to the 7,858-share option that Jose Revuelta exercised on March 9, 2026.