Latest Period
Q1 2026
Security Snapshot
MasterBrand, Inc. - Common Stock, par value $0.01 per share (MBC) Institutional Ownership
CUSIP: 57638P104
13F Institutional Holders and Ownership History from Q4 2022 to Q1 2026
Institutions Reporting
334
Shares (Excl. Options)
154,912,379
Price
$8.31
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- Security type / class
- Equity / Common Stock, par value $0.01 per share
- Symbol
- MBC on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 154,912,379
- Total 13F value
- $1,287,698,696
- Portfolio coverage rank
- 0.01%
- Share change
- +7,938,647
- Value change
- +$61,218,329
- Number of holders
- 334
- Shares outstanding
- 128,229,394
- SEC-reported price per share
- $6.99
- Insider filing price
- $6.99
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MBC - MasterBrand, Inc. - Common Stock, par value $0.01 per share is tracked under CUSIP 57638P104.
- 334 institutions reported positions in Q1 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 328 to 334 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $1,621,827,982 to $1,287,698,696.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 334 institutions filings for Q1 2026.
Security key
57638P104
Latest holder period
Q1 2026
13F holders
334
13D/G owners
6
CIK / CUSIP context first
Open Q1 2026 holders
MBC full holder history
MasterBrand, Inc. SEC filings
MasterBrand, Inc. company facts
MasterBrand, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 57638P104:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
MBC
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 15% | $233,849,689 | 19,358,418 | BlackRock, Inc. | 31 Mar 2025 | |||
| Coliseum Capital Management, LLC | 9.9% | +14% | $111,586,501 | +$15,276,519 | 12,694,710 | +16% | Coliseum Capital Management, LLC | 31 Mar 2026 |
| Gates Capital Management, Inc. | 8.2% | -14% | $136,656,398 | -$21,710,429 | 10,376,340 | -14% | Gates Capital Management, L.P. | 30 Sep 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC | 5.2% | $55,723,760 | 6,705,627 | Vanguard Capital Management | 31 Mar 2026 | |||
| Boston Partners | 5.2% | -17% | $58,627,612 | -$11,086,423 | 6,669,808 | -16% | Boston Partners | 31 Mar 2026 |
| DIMENSIONAL FUND ADVISORS LP | 5.2% | $72,456,359 | 6,563,076 | Dimensional Fund Advisors LP | 31 Dec 2025 |
As of 31 Mar 2026, 334 institutional investors reported holding 154,912,379 shares of MasterBrand, Inc. - Common Stock, par value $0.01 per share (MBC). This represents 121% of the company’s total 128,229,394 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
93%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 15% | 19,352,651 | -0.05% | 0% | $160,820,530 |
| Coliseum Capital Management, LLC | 9.9% | 12,694,710 | +18% | 8.6% | $105,493,040 |
| Gates Capital Management, Inc. | 8.1% | 10,346,864 | +12% | 3% | $85,982,440 |
| DIMENSIONAL FUND ADVISORS LP | 5.5% | 7,010,428 | +6.8% | 0.01% | $58,255,654 |
| Boston Partners | 5.2% | 6,727,552 | -23% | 0.06% | $55,900,697 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 5,725,492 | 0% | 0% | $47,578,839 |
| Pertento Partners LLP | 3.9% | 4,964,821 | +28% | 4.4% | $41,257,663 |
| Sixth Street Partners Management Company, L.P. | 3.8% | 4,905,383 | 0% | 5.7% | $40,763,733 |
| STATE STREET CORP | 3.8% | 4,891,066 | -1.3% | 0% | $40,644,758 |
| FMR LLC | 3.4% | 4,340,250 | +17% | 0% | $36,067,482 |
| PZENA INVESTMENT MANAGEMENT LLC | 3% | 3,814,014 | +0.74% | 0.1% | $31,694,456 |
| ACK Asset Management LLC | 2.9% | 3,700,000 | +61% | 3.8% | $30,747,000 |
| COOKE & BIELER LP | 2.8% | 3,594,545 | +27% | 0.34% | $29,870,669 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 2.4% | 3,134,245 | +0.32% | 0.01% | $26,045,576 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 3,098,501 | +2.9% | 0% | $25,753,604 |
| GOLDMAN SACHS GROUP INC | 2.4% | 3,062,879 | +17% | 0% | $25,452,526 |
| Apollo Management Holdings, L.P. | 2.1% | 2,638,219 | 0.37% | $21,923,600 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2% | 2,542,961 | +1.2% | 0% | $21,132,006 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.9% | 2,457,785 | 0% | 0% | $20,424,193 |
| Monarch Alternative Capital LP | 1.6% | 2,000,000 | 2.8% | $16,620,000 | |
| RENAISSANCE TECHNOLOGIES LLC | 1.4% | 1,752,263 | -23% | 0.02% | $14,561,306 |
| CANYON CAPITAL ADVISORS LLC | 1.3% | 1,691,901 | -14% | 1.8% | $14,059,697 |
| Nixon Capital, LLC | 1.3% | 1,649,501 | +16% | 4.7% | $13,707,354 |
| Decagon Asset Management LLP | 1.2% | 1,546,997 | +103% | 3.3% | $12,855,545 |
| Diameter Capital Partners LP | 1.2% | 1,545,571 | -74% | 2.5% | $12,843,695 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
14
Latest
Q1 2026
Rows shown
1-14 of 14
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 154,912,379 | $1,287,698,696 | +$61,218,329 | $8.31 | 334 |
| 2025 Q4 | 146,852,411 | $1,621,827,982 | +$139,402,377 | $11.04 | 328 |
| 2025 Q3 | 133,500,441 | $1,758,268,751 | +$180,709,700 | $13.17 | 334 |
| 2025 Q2 | 119,921,612 | $1,310,917,077 | -$34,624,791 | $10.93 | 322 |
| 2025 Q1 | 121,463,349 | $1,585,925,370 | +$81,961,811 | $13.06 | 337 |
| 2024 Q4 | 114,912,666 | $1,680,883,255 | -$33,929,879 | $14.61 | 359 |
| 2024 Q3 | 115,261,072 | $2,136,525,666 | +$13,453,723 | $18.54 | 353 |
| 2024 Q2 | 114,874,059 | $1,686,402,022 | -$34,969,708 | $14.68 | 349 |
| 2024 Q1 | 117,013,592 | $2,192,704,319 | +$112,776,323 | $18.74 | 334 |
| 2023 Q4 | 110,862,614 | $1,646,299,359 | +$9,763,843 | $14.85 | 339 |
| 2023 Q3 | 110,714,373 | $1,345,121,257 | -$21,988,908 | $12.15 | 334 |
| 2023 Q2 | 112,074,576 | $1,303,211,897 | -$11,425,830 | $11.63 | 344 |
| 2023 Q1 | 115,012,696 | $924,418,595 | +$39,666,002 | $8.04 | 349 |
| 2022 Q4 | 109,739,271 | $828,497,074 | +$815,675,098 | $7.55 | 375 |