[SCHEDULE 13G/A] Montrose Environmental Group, Inc. SEC Filing

Rhea-AI Filing Summary

UBS Group AG filed Amendment No. 3 to Schedule 13G reporting 0 shares and 0.0% beneficial ownership of Montrose Environmental Group, Inc. (MEG) common stock as of 09/30/2025.

UBS Asset Management indicates that accounts it manages on a discretionary basis may have the right to receive dividends or sale proceeds, but to the best of its knowledge no account holds more than 5% of the class. The filing certifies the holdings are in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

Montrose Environmental Group, Inc.

(Name of Issuer)

Common Stock, par value $0.000004 per share

(Title of Class of Securities)

615111101

(CUSIP Number)

09/30/2025

(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

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS 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

SWITZERLAND

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 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

HC

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: UBS Group AG
(b)	Address or principal business office or, if none, residence: Bahnhofstrasse 45 PO Box CH-8021, Zurich, Switzerland
(c)	Citizenship: Switzerland
(d)	Title of class of securities: Common Stock, par value $0.000004 per share
(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: 0
(b)	Percent of class: 0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Ownership of More than 5 Percent on Behalf of Another Person. Accounts managed on a discretionary basis by the UBS Asset Management division of UBS Group AG (UBS AM) have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities. To the best of our knowledge, no account holds more than 5 percent of the outstanding securities being reported in this filing.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Identification: UBS Asset Management (Americas) LLC. Classification: IA In addition to UBS Group AG, the following UBS Asset Management affiliates and subsidiaries are part of the UBS Asset Management division included in this filing: UBS Asset Management (Americas) LLC., UBS Asset Management (Canada) Inc., UBS Asset Management (Deutschland) GmbH, UBS Asset Management (Europe) S.A., UBS Asset Management (Hong Kong) Ltd, UBS Asset Management (Japan) Ltd, UBS Asset Management (UK) Ltd, UBS Fund Management (Ireland) Ltd., and UBS Fund Management (Switzerland) AG
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. UBS AM is composed of wholly-owned subsidiaries and branches of UBS Group AG. UBS Group AG is reporting direct and indirect beneficial ownership of holdings. None of the reporting persons affirm the existence of a group within the meaning of Rule 13d 5(b)(1).
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.

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

Signature:	Andrew Johnson
Name/Title:	Director
Date:	10/24/2025

FAQ

What did UBS disclose about MEG (Montrose Environmental Group) ownership?

UBS Group AG reported 0 shares and 0.0% beneficial ownership of MEG common stock.

What is the event date for UBS’s MEG ownership report?

The filing states an event date of 09/30/2025.

Which form did UBS file regarding MEG?

UBS filed Schedule 13G/A (Amendment No. 3).

Does UBS claim any intent to influence control at MEG?

No. The certification states holdings are in the ordinary course of business and not to influence control.

Do UBS-managed accounts hold more than 5% of MEG?

To the best of UBS’s knowledge, no account holds more than 5% of the class.

Who signed the UBS ownership filing for MEG?

It was signed by Andrew Johnson, Director, on 10/24/2025.

What is the CUSIP for MEG common stock in the filing?

The CUSIP listed is 615111101.