Quarter-end position / Version 1 · published

MONTROSE ENVIRONMENTAL GROUP.

Reporting manager / owner
AQR CAPITAL MANAGEMENT LLC
Relationship
Associated institution
Record date
2026-03-31
Date meaning
Original Form 13F report period
CUSIP / security class
615111101 / COM
Quantity
111,074 shares
Reported value / amount
$2,431,411
Weight / denominator
0.001113% · Calculated: issuer/class value divided by the complete original reported table; not personal wealth
Quarter-end reported price
Not disclosed; not purchase cost
Derived value per reported unit
21.89001; reported value ÷ quantity, not observed market price
Source-reported activity
Not disclosed
Coverage
Complete original information table grouped by CUSIP and security class
Reviewed by
DeepSeek AI
Published
22 Oct 2026

Original regulatory disclosure; 7 original filing line(s) grouped within this issuer/class. Absence from a disclosed table is not private account verification.

Reporting-entity association

Original filing attribution · 7 line(s)

Reporting manager: AQR CAPITAL MANAGEMENT LLC. 13F COMBINATION REPORT. These are reported investment-discretion relationships, not proof of beneficial ownership or a personal account. Each original line is counted once, including lines naming multiple managers.

Other included managers: 1 / Petros Family Wealth, LLC · CIK 0002004963; 2 / KEB ASSET MANAGEMENT, LLC · CIK 0001903035; 3 / AQR Capital Management Holdings, LLC · CIK 0001633376; 4 / RF&L WEALTH MANAGEMENT, LLC · CIK 0001965915; 5 / Prism Planning Partners LLC · CIK 0002110534; 6 / Compound Planning, Inc. · CIK 0001978879; 7 / DOPKINS WEALTH MANAGEMENT, LLC · CIK 0001904152; 8 / Arax Advisory Partners · CIK 0001586767; 9 / Alaska Permanent Fund Corp · CIK 0001582681; 10 / GuideStone Capital Management, LLC · CIK 0001308668; 11 / HALBERT HARGROVE GLOBAL ADVISORS, LLC · CIK 0001484205; 12 / Stokes Family Office, LLC · CIK 0001802278; 13 / NATIONAL MUTUAL FUNDS MANAGEMENT LTD · CIK 0001966440.

Managers reporting holdings elsewhere: AQR Arbitrage LLC · CIK 0001167456. Those other reports are not included in this table’s total.

ORIGINAL LINEREPORTED QUANTITY / VALUEOTHER MANAGER / DISCRETIONVOTING AUTHORITY
12,595402 shares$8,800Stokes Family Office, LLC · CIK 0001802278Original field: 12 · Discretion: OTRSole 402Shared 0 · None 0
12,596900 shares$19,701HALBERT HARGROVE GLOBAL ADVISORS, LLC · CIK 0001484205Original field: 11 · Discretion: OTRSole 900Shared 0 · None 0
12,59710 shares$219Compound Planning, Inc. · CIK 0001978879Original field: 6 · Discretion: OTRSole 10Shared 0 · None 0
12,59827 shares$591Petros Family Wealth, LLC · CIK 0002004963Original field: 1 · Discretion: OTRSole 27Shared 0 · None 0
12,59917 shares$372RF&L WEALTH MANAGEMENT, LLC · CIK 0001965915Original field: 4 · Discretion: OTRSole 17Shared 0 · None 0
12,600107,850 shares$2,360,837No included manager referencedOriginal field: Not stated · Discretion: DFNDSole 106,660Shared 0 · None 1,190
12,6011,868 shares$40,891Arax Advisory Partners · CIK 0001586767Original field: 8 · Discretion: OTRSole 1,868Shared 0 · None 0

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Sources.

AQR CAPITAL MANAGEMENT LLC — 13F-HR — 2026-03-31 · U.S. SEC EDGAR · Published 15 May 2026 · Collected 22 Oct 2026 · Evidence details ↗

Version history.

Version 1 · published · 22 Oct 2026 · Full review note

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