MasterBrand Inc.
Ownership
Ownership Structure
Who owns MasterBrand Inc. (MBC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 86.1% of the shares are freely tradable; institutional investors hold 78.2%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.54 | 31,554,598 | +1.6 | 06/30/2026 |
| Pzena Investment Management, LLC | 7.55 | 15,329,483 | +24.8 | 06/30/2026 |
| Coliseum Capital Management LLC | 6.50 | 13,200,117 | +4.0 | 06/30/2026 |
| Gates Capital Management Inc | 6.50 | 13,186,754 | +27.4 | 06/30/2026 |
| FMR Inc | 5.11 | 10,370,825 | +129.1 | 06/30/2026 |
| Redwood Capital Management, LLC | 4.84 | 9,821,896 | +492.0 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 4.53 | 9,195,469 | -23.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.35 | 8,834,686 | -0.6 | 06/30/2026 |
| State Street Corp | 4.04 | 8,195,786 | +5.4 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.96 | 12,108,671 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Wanninger Kurt | EVP & Chief Operations Officer | 201,199 | 1,388,273 $ | Aug 11, 2026 | direct |
| Young Mark A. | VP, Chief Accounting Officer | 67,020 | 462,438 $ | Aug 25, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 25, 2026 | Young Mark A. | VP, Chief Accounting Officer | Sell | 2,943 | 9.15 | 26,928 |
| Aug 25, 2026 | Young Mark A. | VP, Chief Accounting Officer | Sell | 3,057 | 9.15 | 27,972 |
| Aug 11, 2026 | Wanninger Kurt | EVP & Chief Operations Officer | Sell | 50,000 | 9.22 | 461,065 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.