[Form 4] Montrose Environmental Group, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Montrose Environmental Group (MEG) reported insider transactions by its President & CEO and Director. On November 10–11, 2025, the insider exercised 44,983 and 44,984 stock options at $6.03 per share, then sold 39,799, 5,072, 112, and 44,984 shares at weighted average prices of $24.626, $25.617, $26.17, and $24.073, respectively. After these transactions, direct beneficial ownership was 316,637 shares. The trades were made under a Rule 10b5-1 trading plan.

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^*

Manthripragada Vijay

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
11/10/2025

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	11/10/2025		M		44,983	A	$6.03	361,620	D
Common Stock	11/10/2025		S		39,799	D	$24.626(1)	321,821	D
Common Stock	11/10/2025		S		5,072	D	$25.617(2)	316,749	D
Common Stock	11/10/2025		S		112	D	$26.17	316,637	D
Common Stock	11/11/2025		M		44,984	A	$6.03	361,621	D
Common Stock	11/11/2025		S		44,984	D	$24.073(3)	316,637	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	11/10/2025		M			44,983	(4)	06/23/2026	Common Stock	44,983	$0	164,142	D
Stock Option (Right to Buy)	$6.03	11/11/2025		M			44,984	(4)	06/23/2026	Common Stock	44,984	$0	119,158	D

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares of common stock of the Issuer were sold in multiple transactions by the Reporting Person at prices ranging from $24.060 to $25.040, inclusive. The Reporting Person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer full information regarding the number of shares of common stock sold at each separate price within the range.

2. The price reported in Column 4 is a weighted average price. These shares of common stock of the Issuer were sold in multiple transactions by the Reporting Person at prices ranging from $25.060 to $26.045, inclusive. The Reporting Person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer full information regarding the number of shares of common stock sold at each separate price within the range.

3. The price reported in Column 4 is a weighted average price. These shares of common stock of the Issuer were sold in multiple transactions by the Reporting Person at prices ranging from $23.720 to $24.620, inclusive. The Reporting Person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer full information regarding the number of shares of common stock sold at each separate price within the range.

4. 50% of the shares subject to the option vested on September 11, 2017 and the remaining 50% vested on September 11, 2019.

Remarks:

The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person.

	/s/ Nasym Afsari, Attorney in Fact	11/12/2025
	** 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 did MEG (MEG) disclose in this Form 4?

The President & CEO and Director exercised options and sold common shares on November 10–11, 2025, under a Rule 10b5-1 plan.

How many options did MEG’s CEO exercise and at what price?

He exercised 44,983 options on Nov 10 and 44,984 on Nov 11 at an exercise price of $6.03 per share.

How many MEG shares were sold and at what prices?

Shares sold were 39,799 at $24.626, 5,072 at $25.617, 112 at $26.17, and 44,984 at $24.073 (weighted averages).

What were the price ranges for the weighted average sales?

Ranges: $24.060–$25.040 (note 1), $25.060–$26.045 (note 2), and $23.720–$24.620 (note 3).

What is the insider’s MEG share ownership after these transactions?

Direct beneficial ownership was 316,637 shares after the reported transactions.

Were these MEG trades under a Rule 10b5-1 plan?

Yes. The filing states the transactions were effected pursuant to a Rule 10b5-1 trading plan.

What is the vesting detail for the exercised options?

Per note 4, 50% vested on September 11, 2017 and the remaining 50% vested on September 11, 2019.