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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
Squarepoint
351
Squarepoint
New York
– -$216K -19,788 Closed
HSBC Holdings
352
HSBC Holdings
United Kingdom
– -$168K -15,598 Closed
QC
353
Quadrature Capital
United Kingdom
– -$134K -12,249 Closed
TC
354
TwinBeech Capital
New York
– -$122K -11,170 Closed
EAM
355
Erste Asset Management
Austria
– -$34.6K -2,800 Closed
TCM
356
Traub Capital Management
Massachusetts
– -$14.1K -1,290 Closed
BFPW
357
BOK Financial Private Wealth
Colorado
– -$7.21K -660 Closed
AA
358
Addison Advisors
Vermont
– -$6.25K -572 Closed
BIG
359
Brooklyn Investment Group
New York
– -$4.86K -445 Closed
ME
360
McIlrath & Eck
Washington
– -$4.37K -400 Closed
PSFG
361
Park Square Financial Group
Georgia
– -$4.37K -400 Closed
TPWA
362
Twin Peaks Wealth Advisors
California
– -$4.39K -352 Closed
PB
363
Pinnacle Bancorp
Nebraska
– -$3.28K -300 Closed
AAG
364
Accordant Advisory Group
Maryland
– -$2.19K -200 Closed
WW
365
Winnow Wealth
Texas
– -$2.19K -200 Closed
BBHC
366
Brown Brothers Harriman & Co
New York
– -$907 -83 Closed
SO
367
Sierra Ocean
California
– -$678 -62 Closed
WSFS
368
Wilmington Savings Fund Society
Delaware
– -$339 -31 Closed
AAS
369
Ameritas Advisory Services
Nebraska
– -$251 -23 Closed
WA
370
Whipplewood Advisors
Colorado
– -$120 -11 Closed
GC
371
Garde Capital
Washington
– -$55 -5 Closed
TSMHT
372
Thurston Springer Miller Herd & Titak
Indiana
– -$32 -3 Closed
SC
373
Stephens Consulting
Michigan
– -$11 -1 Closed
CCM
374
Cloud Capital Management
Washington
– +$49 +4 New
11 12 13 14
15

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.