Vanguard disaggregates holdings; reports 0 shares in Montrose (MEG)

Rhea-AI Filing Summary

Montrose Environmental Group Inc: An amended Schedule 13G/A from The Vanguard Group states it beneficially owns 0 shares of common stock, representing 0% of the class. The amendment explains an internal realignment and disaggregation of certain subsidiaries under SEC Release No. 34-39538, which led those entities to report separately. The filing is signed by Ashley Grim, Head of Global Fund Administration.

Insights

Institutional Ownership Analyst

Vanguard amended its holding record to show no beneficial ownership after internal reorganization.

The filing records 0 shares and 0% ownership; it attributes the change to an internal realignment and reliance on SEC Release No. 34-39538 so certain subsidiaries now report separately. This is an administrative reporting change rather than a market trade.

Cash‑flow treatment and any trading by the disaggregated subsidiaries are not detailed in the excerpt; subsequent filings may show individual subsidiary positions.

Compliance and Governance Expert

The amendment documents formal disaggregation under an SEC release; it's a compliance disclosure.

The statement cites the January 12, 1998 release to explain that certain Vanguard subsidiaries will report separately and that Vanguard "no longer has, or is deemed to have, beneficial ownership" of those securities. The language follows standard SEC guidance for reorganizations and reporting attribution.

Investors should note this is a disclosure update; the filing does not assert control changes or list subsidiary holdings in this excerpt.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Montrose Environmental Group Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

615111101

(CUSIP Number)

03/13/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 615111101

1

Names of Reporting Persons

The Vanguard Group

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

PENNSYLVANIA

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 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: On January 12, 2026, The Vanguard Group, Inc. went through an internal realignment. In accordance with SEC Release No. 34-39538 (January 12, 1998), certain subsidiaries or business divisions of subsidiaries of The Vanguard Group, Inc., that formerly had, or were deemed to have, beneficial ownership with The Vanguard Group, Inc., will report beneficial ownership separately (on a disaggregated basis) from The Vanguard Group, Inc. in reliance on such release. These subsidiaries and/or business divisions pursue the same investment strategies as previously pursued by The Vanguard Group, Inc. prior to the realignment. Further in accordance with SEC Release No. 34-39538 (January 12, 1998), The Vanguard Group, Inc. no longer has, or is deemed to have, beneficial ownership over securities beneficially owned by such subsidiaries and/or business divisions.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Montrose Environmental Group Inc
(b)	Address of issuer's principal executive offices: 5120 Northshore Dr, North Little Rock, AR, 72118
Item 2.
(a)	Name of person filing: The Vanguard Group
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd.,, Malvern, PA, 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.:
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. The Vanguard Group, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%.
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.

The Vanguard Group

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	03/27/2026

FAQ

Who filed the Schedule 13G/A for Montrose Environmental Group (MEG)?

The filing was made by The Vanguard Group. The amendment is signed by Ashley Grim, Head of Global Fund Administration, and cites Vanguard's address at 100 Vanguard Blvd., Malvern, PA.

What change does the Schedule 13G/A report for MEG?

The amendment reports that The Vanguard Group beneficially owns 0 shares of common stock, representing 0% of the class, following an internal realignment and disaggregation of certain subsidiaries.

Why does Vanguard state it now reports 0 shares in the amendment?

Vanguard explains an internal realignment and reliance on SEC Release No. 34-39538, which permits subsidiaries or business divisions to report beneficial ownership separately from The Vanguard Group.

Does this filing list which Vanguard subsidiaries now report separately?

The amendment notes that certain subsidiaries or business divisions will report disaggregated ownership but does not list their names or provide their individual holdings in this excerpt.

Does the Schedule 13G/A indicate Vanguard controls Montrose Environmental (MEG)?

No. The filing shows 0 shares and 0% ownership and states Vanguard no longer has beneficial ownership over securities held by the disaggregated subsidiaries in reliance on the cited SEC release.