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MasterBrand
MBC

336 hedge funds and large institutions have $1.76B invested in MasterBrand in 2025 Q3 according to their latest regulatory filings, with 55 funds opening new positions, 106 increasing their positions, 82 reducing their positions, and 38 closing their positions.

New
Increased
Maintained
Reduced
Closed

643% more call options, than puts

Call options by funds: $52K | Put options by funds: $7K

45% more first-time investments, than exits

New positions opened: 55 | Existing positions closed: 38

40% more funds holding in top 10

Funds holding in top 10: 5 → 7 (+2)

35% more capital invested

Capital invested by funds: $1.31B → $1.76B (+$453M)

29% more repeat investments, than reductions

Existing positions increased: 106 | Existing positions reduced: 82

11.05% more ownership

Funds ownership: 94.56% → 105.61% (+11%)

4% more funds holding

Funds holding: 324 → 336 (+12)

Holders
336
Holders Change
+12
Holders Change %
+3.7%
% of All Funds
4.41%
Holding in Top 10
7
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+40%
% of All Funds
0.09%
New
55
Increased
106
Reduced
82
Closed
38
Calls
$52K
Puts
$7K
Net Calls
+$45K
Net Calls Change
+$3K

Top Buyers

1
DCP
Diameter Capital Partners
New York
+$50.2M
2
CCM
Coliseum Capital Management
Connecticut
+$40.3M
3
AAM
ACK Asset Management
Connecticut
+$28.4M
4
SSP
Sixth Street Partners
Texas
+$24M
5
SCM
Stonehill Capital Management
New York
+$18.3M

Top Sellers

1
Thrivent Financial for Lutherans
Thrivent Financial for Lutherans
Minnesota
-$46.6M
2
Fidelity Investments
Fidelity Investments
Massachusetts
-$26.3M
3
GCM
Gates Capital Management
New York
-$20.4M
4
Millennium Management
Millennium Management
New York
-$5.49M
5
RA
Royce & Associates
New York
-$3.06M
Name Holding Trade Value Shares
Change 		Change in
Stake
BlackRock
1
BlackRock
New York
$249M +$369K +29,846 +0.2%
GCM
2
Gates Capital Management
New York
$137M -$20.4M -1,648,476 -14%
Vanguard Group
3
Vanguard Group
Pennsylvania
$120M -$1.26M -101,656 -1%
Boston Partners
4
Boston Partners
Massachusetts
$118M +$8.04M +649,960 +8%
CCM
5
Coliseum Capital Management
Connecticut
$99.6M +$40.3M +3,259,210 +76%
Dimensional Fund Advisors
6
Dimensional Fund Advisors
Texas
$82.8M +$1.82M +147,177 +2%
DCP
7
Diameter Capital Partners
New York
$66.6M +$50.2M +4,060,410 +406%
State Street
8
State Street
Massachusetts
$65M +$43.1K +3,486 +0.1%
Pzena Investment Management
9
Pzena Investment Management
New York
$54.3M -$392K -31,697 -0.8%
Fidelity Investments
10
Fidelity Investments
Massachusetts
$48.8M -$26.3M -2,126,823 -36%
SSP
11
Sixth Street Partners
Texas
$44M +$24M +1,938,892 +138%
Geode Capital Management
12
Geode Capital Management
Massachusetts
$39.7M +$149K +12,067 +0.4%
UBS AM
13
UBS AM
Illinois
$38.8M +$6.08M +492,035 +20%
Charles Schwab
14
Charles Schwab
California
$32.8M +$88.8K +7,178 +0.3%
Goldman Sachs
15
Goldman Sachs
New York
$32.6M +$16.9M +1,366,686 +124%
AAM
16
ACK Asset Management
Connecticut
$30.3M +$28.4M +2,300,000 New
Renaissance Technologies
17
Renaissance Technologies
New York
$27.8M +$749K +60,608 +3%
SCM
18
Stonehill Capital Management
New York
$25.7M +$18.3M +1,479,780 +312%
Teacher Retirement System of Texas
19
Teacher Retirement System of Texas
Texas
$25.3M +$10.6M +856,342 +80%
CCA
20
Canyon Capital Advisors
Texas
$23.7M +$9.09M +734,854 +69%
Northern Trust
21
Northern Trust
Illinois
$19.4M -$151K -12,206 -0.8%
Morgan Stanley
22
Morgan Stanley
New York
$18.2M -$850K -68,731 -5%
NC
23
Nixon Capital
Texas
$16.2M +$4.36M +352,489 +40%
DLP
24
De Lisle Partners
United Kingdom
$14.7M – – –
PCH
25
Polar Capital Holdings
United Kingdom
$13.1M +$5.25M +424,329 +74%
1
2 3 4 5

MBC Hedge Fund Activity: Q3 2025 in Review

336 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in MasterBrand (MBC) for Q3 2025, worth a combined $1.76B — up 35% from $1.31B a quarter earlier.

Buyers outnumbered sellers: 55 funds opened new MBC positions and 38 closed out — a net gain of 17 holders — while 106 added to existing stakes and 82 trimmed.

The largest buyer was Diameter Capital Partners, adding an estimated $50.2M. The largest seller was Thrivent Financial for Lutherans, cutting an estimated $46.6M.

  • 336 institutional investors held MasterBrand (MBC) as of Q3 2025, up from 324 in Q2 2025.
  • Funds reported $1.76B of MasterBrand stock for Q3 2025, up 35% quarter-over-quarter.
  • 55 funds opened new MasterBrand positions in Q3 2025 and 38 closed out, a net change of +17 holders.
  • The largest MasterBrand buyer in Q3 2025 was Diameter Capital Partners, an estimated $50.2M added.
  • The largest MasterBrand seller in Q3 2025 was Thrivent Financial for Lutherans, an estimated $46.6M sold.

Based on aggregated 13F filings for Q3 2025.