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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
GAM
151
Gotham Asset Management
New York
$294K +$32.4K +2,623 +13%
Commonwealth Equity Services
152
Commonwealth Equity Services
Massachusetts
$276K -$40.1K -3,244 -13%
CC
153
Carlson Capital
Texas
$271K +$255K +20,600 New
BC
154
Bridgefront Capital
Texas
$270K +$254K +20,539 New
Corient Private Wealth
155
Corient Private Wealth
Florida
$264K +$18.4K +1,491 +8%
Wealth Enhancement Advisory Services
156
Wealth Enhancement Advisory Services
Minnesota
$246K -$4.35K -352 -2%
GAMC
157
Garner Asset Management Corp
Texas
$245K +$2.1K +170 +0.9%
PCM
158
Prelude Capital Management
New York
$241K +$226K +18,279 New
MSRPS
159
Maryland State Retirement & Pension System
Maryland
$240K -$234K -18,920 -51%
VPIM
160
Vanguard Personalized Indexing Management
California
$238K -$2.51K -203 -1%
Mackenzie Financial
161
Mackenzie Financial
Ontario, Canada
$236K +$222K +17,940 New
Grantham, Mayo, Van Otterloo & Co (GMO)
162
Grantham, Mayo, Van Otterloo & Co (GMO)
Massachusetts
$236K – – –
FRM
163
Fox Run Management
Connecticut
$226K -$19.1K -1,542 -8%
Pathstone Holdings
164
Pathstone Holdings
New Jersey
$223K +$210K +16,956 New
Neuberger Berman Group
165
Neuberger Berman Group
New York
$212K +$11K +888 +6%
AP
166
Americana Partners
Texas
$210K +$64.9K +5,250 +49%
Cambridge Investment Research Advisors
167
Cambridge Investment Research Advisors
Iowa
$209K +$9.69K +784 +5%
Public Employees Retirement Association of Colorado
168
Public Employees Retirement Association of Colorado
Colorado
$201K – – –
JF
169
Jump Financial
Illinois
$194K +$182K +14,700 New
GS
170
GTS Securities
New York
$191K +$34.3K +2,778 +24%
MOACM
171
Mutual of America Capital Management
New York
$187K -$25.8K -2,085 -13%
Osaic Holdings
172
Osaic Holdings
Arizona
$185K +$26.1K +2,111 +18%
US Bancorp
173
US Bancorp
Minnesota
$181K -$12 -1 -0%
CBU
174
CIBC Bancorp USA
Illinois
$178K +$168K +13,547 New
Bank of Montreal
175
Bank of Montreal
Ontario, Canada
$171K -$142K -11,467 -47%
5 6
7
8 9

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.