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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
CIAM
226
Caitong International Asset Management
Hong Kong
$18.8K +$17.6K +1,423 +142,300%
NA
227
NewEdge Advisors
Louisiana
$18.2K -$6.69K -541 -28%
MCM
228
MAI Capital Management
Ohio
$17.3K -$445 -36 -3%
CTA
229
Colonial Trust Advisors
South Carolina
$17.3K -$1.35K -109 -8%
C
230
Covestor
United Kingdom
$17K +$1.51K +122 +10%
BCM
231
Blume Capital Management
California
$16.9K – – –
WT
232
Whittier Trust
California
$15.9K – – –
CNBT
233
Cornerstone National Bank & Trust
Illinois
$15K – – –
GWSG
234
GPS Wealth Strategies Group
Colorado
$15K – – –
SL
235
Salomon & Ludwin
Virginia
$15K +$12.6K +1,017 +942%
WANY
236
Wealthspire Advisors (New York)
New York
$14.6K +$13.8K +1,112 New
AAP
237
Arax Advisory Partners
Colorado
$14.4K +$9.09K +735 +204%
PS
238
Principal Securities
Iowa
$14.3K +$816 +66 +6%
HFS
239
Hantz Financial Services
Michigan
$14K +$7.21K +583 +113%
SSG
240
Summit Securities Group
New York
$13.1K +$12.3K +998 New
GKIM
241
GW&K Investment Management
Massachusetts
$12K – – –
DWM
242
Darwin Wealth Management
Florida
$11.9K – – –
IBOK
243
Independence Bank of Kentucky
Kentucky
$11.9K +$11.1K +900 New
RIL
244
Rothschild Investment LLC
Illinois
$11.7K -$185 -15 -2%
BNP Paribas Asset Management
245
BNP Paribas Asset Management
France
$11K +$1.25K +101 +14%
UB
246
UMB Bank
Missouri
$10.9K +$2K +162 +24%
BONH
247
Bank of New Hampshire
New Hampshire
$10.5K – – –
PWAM
248
Private Wealth Asset Management
Iowa
$10.5K – – –
MWPCG
249
Measured Wealth Private Client Group
New Hampshire
$9.38K +$8.8K +712 New
Optiver Holding
250
Optiver Holding
Netherlands
$9.13K +$5.14K +416 +150%
8 9
10
11 12

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.