Quick Takeaways
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC filed SCHEDULE 13G/A for Montrose Environmental Group, Inc. Common Stock (MEG).
- Disclosed ownership: 3.7%.
- Date of event: 30 Sep 2025.
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - 30 Sep 2025 SCHEDULE 13G/A Report for Montrose Environmental Group, Inc. Common Stock (MEG)
- Filing Manager
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
- Reporting Manager
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
- Symbol
- MEG
- Shares outstanding
- 35,541,027 shares
- Disclosed Ownership
- 1,315,018 shares
- Ownership
- 3.7%
- Form type
- SCHEDULE 13G/A
- Filing time
- 12 Nov 2025, 18:19:25 UTC
- Date of event
- 30 Sep 2025
- Previous filing
- 30 Jul 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC disclosed 3.7% ownership in Montrose Environmental Group, Inc. Common Stock (MEG) on 30 Sep 2025."
What Changed
- Previous schedule filing date: 30 Jul 2025.
- Current filing was accepted on 12 Nov 2025, 18:19.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 3.7% | 1,315,018 | 1,052,190 | 0 | Walter R. Randall, Jr. | Chief Compliance Officer |