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MCM

Mason Capital Management Portfolio holdings

AUM $613M
1-Year Est. Return 21.43%
This Fund
S&P 500
This Quarter Est. Return
-14.95%
1 Year Est. Return
+21.43%
3 Year Est. Return
-17.99%
5 Year Est. Return
+51.94%
10 Year Est. Return
+270.99%
AUM
$491M
AUM Growth
-$20.2M
Cap. Flow
+$73.3M
Cap. Flow %
14.93%
Top 10 Hldgs %
100%
Holding
7
New
3
Increased
–
Reduced
–
Closed
1

Top Buys

Rank Stock Value
1
KVUE icon
Kenvue
KVUE
+$53M
2
BKD icon
Brookdale Senior Living
BKD
+$18.9M
3
MLAB icon
Mesa Laboratories
MLAB
+$5.06M

Top Sells

Rank Stock Value
1
CCIR
Cohen Circle Acquisition Corp. I Class A Ordinary Shares
CCIR
+$3.57M

Sector Composition

Rank Sector Weight
1 Industrials 82.99%
2 Consumer Staples 8.57%
3 Healthcare 4.27%
4 Communication Services 3.16%
5 Technology 0.96%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ATS icon
1
ATS Corp
ATS
$2.6B
$408M 82.99%
15,563,568
– –
KVUE icon
2
Kenvue
KVUE
$37.5B
$42.1M 8.57%
+2,595,000
New +$53M
BKD icon
3
Brookdale Senior Living
BKD
$3.65B
$21M 4.27%
+2,475,964
New +$18.9M
CCO icon
4
Clear Channel Outdoor Holdings
CCO
$1.23B
$15.5M 3.16%
9,828,401
– –
MLAB icon
5
Mesa Laboratories
MLAB
$554M
$4.71M 0.96%
+70,300
New +$5.06M
SBNY
6
DELISTED
Signature Bank
SBNY
$260K 0.05%
400,000
– –
CCIR
7
DELISTED
Cohen Circle Acquisition Corp. I Class A Ordinary Shares
CCIR
– –
-325,000
Closed -$3.57M

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1SAMC
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Mason Capital Management's Q3 2025 Portfolio in Review

As of Q3 2025, Mason Capital Management held 7 positions worth $491M, down 3.9% from $512M the previous quarter. Its ten largest holdings account for 100% of the portfolio.

Mason Capital Management deployed $73.3M of net new capital in Q3 2025, opening 3 new positions. Its largest new stake was Kenvue: 2,595,000 shares worth $42.1M.

By sector, the portfolio is most concentrated in Industrials at 83% of assets, down from 97% a quarter earlier, followed by Consumer Staples and Healthcare.

On the sell side, the most notable exit was Cohen Circle Acquisition Corp. I Class A Ordinary Shares, an estimated $3.57M sold.

  • Mason Capital Management's largest Q3 2025 buy was Kenvue: 2,595,000 shares worth $42.1M.
  • Mason Capital Management fully exited Cohen Circle Acquisition Corp. I Class A Ordinary Shares in Q3 2025, selling an estimated $3.57M.
  • Mason Capital Management's ten largest holdings make up 100% of its $491M portfolio in Q3 2025.
  • Mason Capital Management opened 3 new positions and closed 1 in Q3 2025.
  • Mason Capital Management's portfolio value fell 3.9% quarter-over-quarter to $491M.

Based on Mason Capital Management's 13F filing for Q3 2025, filed 14 Nov 2025.