MASTERBRAND INC (MBC) Institutional Shareholders
MASTERBRAND INC (MBC) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $1.26B in MBC holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MBC tracked by InsiderSet, reporting ownership valued at approximately $160.82M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $159.66M, representing an estimated loss of -0.72% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed MBC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Coliseum Capital Management, Llc, Gates Capital Management, Inc., and several other long-term asset managers with concentrated positions in MASTERBRAND INC (MBC).
This page ranks the largest institutional MBC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
338
Total Reported Value
$1.26B
Largest Holder
Blackrock, Inc.
Largest Position
$160.82M
Insider Transactions (90d)
25
Latest Filing Quarter
Q2 2026
New Institutional Positions
70
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 19,352,651 | $160,820,530 | $159,659,371 | -$1,161,159 | -0.72% | |
| Coliseum Capital Management, Llc | 8.65% | 12,694,710 | $105,493,040 | $104,731,358 | -$761,683 | -0.72% | |
| Gates Capital Management, Inc. | 2.97% | 10,346,864 | $85,982,440 | $85,361,628 | -$620,812 | -0.72% | |
| Dimensional Fund Advisors Lp | 0.01% | 7,010,428 | $58,255,654 | $57,836,031 | -$419,623 | -0.72% | |
| Boston Partners | 0.06% | 6,727,552 | $55,900,697 | $55,502,304 | -$398,393 | -0.71% | |
| Vanguard Capital Management Llc | 0.00% | 5,725,492 | $47,578,839 | $47,235,309 | -$343,530 | -0.72% | |
| Pertento Partners Llp | 4.38% | 4,964,821 | $41,257,663 | $40,959,773 | -$297,890 | -0.72% | |
| Sixth Street Partners Management Company, L.P. | 5.74% | 4,905,383 | $40,763,733 | $40,469,410 | -$294,323 | -0.72% | |
| State Street Corp | 0.00% | 4,891,066 | $40,644,758 | $40,351,295 | -$293,464 | -0.72% | |
| Fmr Llc | 0.00% | 4,340,250 | $36,067,482 | $35,807,063 | -$260,420 | -0.72% | |
| Hancock Classic Value | Richard Pzena | 0.10% | 3,814,014 | $31,694,456 | $31,465,616 | -$228,841 | -0.72% |
| Ack Asset Management Llc | 3.84% | 3,700,000 | $30,747,000 | $30,525,000 | -$222,000 | -0.72% | |
| Cooke & Bieler Lp | 0.30% | 2,551,527 | $26,255,213 | $21,050,098 | -$5,205,115 | -19.83% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.01% | 3,134,245 | $26,045,576 | $25,857,521 | -$188,055 | -0.72% | |
| Geode Capital Management, Llc | 0.00% | 3,098,501 | $25,753,604 | $25,562,633 | -$190,971 | -0.74% | |
| Goldman Sachs Group Inc | 0.00% | 3,062,879 | $25,452,526 | $25,268,752 | -$183,774 | -0.72% | |
| Apollo Management Holdings, L.P. | 0.37% | 2,638,219 | $21,923,600 | $21,765,307 | -$158,293 | -0.72% | |
| Charles Schwab Investment Management Inc | 0.00% | 2,542,961 | $21,132,006 | $20,979,428 | -$152,578 | -0.72% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,457,785 | $20,424,193 | $20,276,726 | -$147,467 | -0.72% | |
| Monarch Alternative Capital Lp | 2.83% | 2,000,000 | $16,620,000 | $16,500,000 | -$120,000 | -0.72% | |
| Renaissance Technologies LLC | Jim Simons | 0.02% | 1,752,263 | $14,561,306 | $14,456,170 | -$105,136 | -0.72% |
| Canyon Capital Advisors Llc | 1.82% | 1,691,901 | $14,059,697 | $13,958,183 | -$101,514 | -0.72% | |
| Nixon Capital, Llc | 4.68% | 1,649,501 | $13,707,354 | $13,608,383 | -$98,971 | -0.72% | |
| Decagon Asset Management Llp | 3.34% | 1,546,997 | $12,855,545 | $12,762,725 | -$92,820 | -0.72% | |
| Diameter Capital Partners Lp | 2.46% | 1,545,571 | $12,843,695 | $12,750,961 | -$92,734 | -0.72% | |
| Northern Trust Corp | 0.00% | 1,354,929 | $11,259,460 | $11,178,164 | -$81,296 | -0.72% | |
| Atlas Frm Llc | 0.71% | 1,300,000 | $10,803,000 | $10,725,000 | -$78,000 | -0.72% | |
| Redwood Capital Management, Llc | 1.59% | 1,286,097 | $10,687,466 | $10,610,300 | -$77,166 | -0.72% | |
| Morgan Stanley | 0.00% | 1,147,497 | $9,535,717 | $9,466,850 | -$68,867 | -0.72% | |
| Paradigm Capital Management Inc/Ny | 0.34% | 1,082,091 | $8,992,176 | $8,927,251 | -$64,925 | -0.72% | |
| Melqart Asset Management (Uk) Ltd | 0.88% | 1,073,202 | $8,918,309 | $8,853,917 | -$64,393 | -0.72% | |
| De Lisle Partners Llp | 1.06% | 1,064,941 | $8,854,809 | $8,785,763 | -$69,046 | -0.78% | |
| Invesco Ltd. | 0.00% | 926,402 | $7,698,401 | $7,642,817 | -$55,585 | -0.72% | |
| Grace & White Inc | 1.16% | 714,463 | $7,351,829 | $5,894,320 | -$1,457,509 | -19.83% | |
| Bank Of New York Mellon Corp | 0.00% | 848,008 | $7,046,949 | $6,996,066 | -$50,883 | -0.72% | |
| Marathon Asset Management Ltd | 0.27% | 842,902 | $7,004,516 | $6,953,942 | -$50,575 | -0.72% | |
| Pictet Asset Management Holding Sa | 0.01% | 678,468 | $6,981,436 | $5,597,361 | -$1,384,075 | -19.83% | |
| Vanguard Fiduciary Trust Co | 0.00% | 830,003 | $6,897,325 | $6,847,525 | -$49,800 | -0.72% | |
| Bridgeway Capital Management, Llc | 0.13% | 766,371 | $6,368,543 | $6,322,561 | -$45,982 | -0.72% | |
| Polar Capital Holdings Plc | 0.03% | 743,646 | $6,179,698 | $6,135,080 | -$44,619 | -0.72% | |
| Ubs Group Ag | 0.00% | 668,719 | $5,557,055 | $5,516,932 | -$40,123 | -0.72% | |
| Principal Financial Group Inc | 0.00% | 616,268 | $5,121,187 | $5,084,211 | -$36,976 | -0.72% | |
| Peregrine Capital Management Llc | 0.16% | 484,682 | $4,987,378 | $3,998,627 | -$988,752 | -19.83% | |
| Allianz Asset Management Gmbh | 0.01% | 530,131 | $4,405,389 | $4,373,581 | -$31,808 | -0.72% | |
| Victory Capital Management Inc | 0.00% | 520,365 | $4,324,233 | $4,293,011 | -$31,222 | -0.72% | |
| Bank Of America Corp | 0.00% | 506,110 | $4,205,774 | $4,175,408 | -$30,367 | -0.72% | |
| Balyasny Asset Management L.P. | 0.01% | 501,700 | $4,169,127 | $4,139,025 | -$30,102 | -0.72% | |
| Empowered Funds, Llc | 0.03% | 476,219 | $3,957,380 | $3,928,807 | -$28,573 | -0.72% | |
| Millennium Management Llc | 0.00% | 472,867 | $3,929,525 | $3,901,153 | -$28,372 | -0.72% | |
| Public Sector Pension Investment Board | 0.01% | 453,540 | $3,768,917 | $3,741,705 | -$27,212 | -0.72% |
Frequently asked questions about MBC
Who owns the most MBC stock?
The largest holders of MBC are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MASTERBRAND INC (MBC).
Is MBC widely held by superinvestors?
Many widely followed stocks like MBC appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MBC is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.