Schedule 13G/A: MAAL holds 957,130 shares (2.7%) of MEG

Rhea-AI Filing Summary

Managed Account Advisors, LLC reports a beneficial ownership position in Montrose Environmental Group, Inc. of 957,130 shares, representing 2.7% of the outstanding common stock. The filing identifies the reporting person as an investment adviser (IA).

Voting power is reported as zero for both sole and shared voting, while dispositive authority is split between 650,711 shares with sole dispositive power and 306,419 shares with shared dispositive power. The filing states the securities are held in the ordinary course of business and not for the purpose of changing or influencing control.

Insights

Securities Analyst

TL;DR: 2.7% beneficial stake reported; no voting control, classified as an investment adviser.

The filing shows Managed Account Advisors beneficially owns 957,130 shares (2.7%). The report lists 0 sole and shared voting power but discloses sole and shared dispositive powers of 650,711 and 306,419 shares respectively. As an IA-class filing, this documents ownership and disposition rights rather than an intent to influence corporate control. The position is below typical 5% material thresholds and is presented as held in the ordinary course of business.

Corporate Governance Expert

TL;DR: No voting authority reported; the adviser holds disposal rights but limited governance influence.

The statement clearly records no voting power associated with the reported holdings, while dispositional authority is split between sole and shared powers. That structure implies the filer can direct disposition of shares but does not claim voting control. The certification that holdings are not intended to affect control reinforces the filing's passive posture from a governance perspective.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Montrose Environmental Group, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

615111101

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 615111101

1

Names of Reporting Persons

MANAGED ACCOUNT ADVISORS, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 650,711.00
8	Shared Dispositive Power 306,419.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

957,130.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

2.7 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Montrose Environmental Group, Inc.
(b)	Address of issuer's principal executive offices: 4 PARK PLAZA, SUITE 790, 4 PARK PLAZA, SUITE 790, IRVINE, CALIFORNIA, 92614.
Item 2.
(a)	Name of person filing: MANAGED ACCOUNT ADVISORS LLC
(b)	Address or principal business office or, if none, residence: 101 HUDSON STREET 9TH FLOOR JERSEY CITY, NJ 07302
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 615111101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 957,130.00
(b)	Percent of class: 2.7%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0.00
	(ii) Shared power to vote or to direct the vote: 0.00
	(iii) Sole power to dispose or to direct the disposition of: 650,711.00
	(iv) Shared power to dispose or to direct the disposition of: 306,419.00
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

MANAGED ACCOUNT ADVISORS, LLC

Signature:	John Capelli
Name/Title:	Authorized Signatory
Date:	08/13/2025

FAQ

How many Montrose Environmental Group (MEG) shares does Managed Account Advisors own?

The filing reports 957,130 shares, representing 2.7% of the outstanding common stock.

Does Managed Account Advisors have voting power over MEG shares?

No. The filing reports 0 sole voting power and 0 shared voting power.

How many shares are under the filer’s sole and shared dispositive power?

The filing shows 650,711 shares with sole dispositive power and 306,419 shares with shared dispositive power.

What type of SEC filing is this for MEG?

This is a Schedule 13G/A reporting beneficial ownership; the reporting person is classified as an investment adviser (IA).

Does the filing indicate intent to influence control of Montrose (MEG)?

No. The filing certifies the securities are held in the ordinary course of business and were not acquired and are not held to change or influence control.