Quick Takeaways
- Boston Partners filed SCHEDULE 13G/A for MasterBrand, Inc. Common Stock (MBC).
- Disclosed ownership: 5.2%.
- Date of event: 31 Mar 2026.
Boston Partners - 31 Mar 2026 SCHEDULE 13G/A Report for MasterBrand, Inc. Common Stock (MBC)
- Filing Manager
- Boston Partners
- Reporting Manager
- Boston Partners
- Security
- MasterBrand, Inc. Common Stock
- Symbol
- MBC
- Shares outstanding
- 127,529,790 shares
- Disclosed Ownership
- 6,669,808 shares
- Ownership
- 5.2%
- Form type
- SCHEDULE 13G/A
- Filing time
- 14 May 2026, 21:46:40 UTC
- Date of event
- 31 Mar 2026
- Previous filing
- 08 Aug 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"Boston Partners disclosed 5.2% ownership in MasterBrand, Inc. Common Stock (MBC) on 31 Mar 2026."
What Changed
- Previous schedule filing date: 08 Aug 2025.
- Current filing was accepted on 14 May 2026, 21:46.
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 |
|---|---|---|---|---|---|---|---|
| Boston Partners | 5.2% | 6,669,808 | 6,272,359 | 0 | /s/ Ali Farooqi | Ali Farooqi / Senior Compliance Manager |