MasterBrand, Inc. (MBC) ownership: Top institutional holder: Decagon Asset Management LLP ($12.86B). Insider activity: Net Seller (3 buys, 17 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Decagon Asset Management LLP | 1546997.00 | $12.86B | 2026-03-31 |
| BlackRock, Inc. | 19352651.00 | $160.82M | 2026-03-31 |
| Coliseum Capital Management, LLC | 12694710.00 | $105.49M | 2026-03-31 |
| VANGUARD GROUP INC | 9079055.00 | $100.23M | 2025-12-31 |
| Gates Capital Management, Inc. | 10346864.00 | $85.98M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 7010428.00 | $58.26M | 2026-03-31 |
| Boston Partners | 6727552.00 | $55.90M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 5725492.00 | $47.58M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-08-11 | |
| Buy | null | 2026-06-11 | |
| Sell | null | 2026-06-10 | |
| Buy | null | 2026-06-08 | |
| Sell | null | 2026-06-03 | |
| Sell | null | 2026-06-03 | |
| Sell | null | 2026-06-03 | |
| Sell | null | 2026-06-03 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.