MASON CAPITAL MANAGEMENT LLC
Hedge Fund • Event Driven
MASON CAPITAL MANAGEMENT LLC is an Event Driven Hedge Fund based in New York, NY led by Samuel Thornton Read, reporting $1.8B in AUM as of Q3 2025 with 83% Industrials concentration, with only 5 positions, and 83% allocation to ATS.
Managing PartnerSamuel Thornton Read
- Portfolio Value
- $491.1M
- Positions
- 5
- Top Holding
- ATS at 83.03%
- Last Reported
- Q3 2025
Top Holdings
Largest long holdings in MASON CAPITAL MANAGEMENT LLC's portfolio (100% of total portfolio)
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| Holding | Sector | Position | Weight | Traded | Ownership |
|---|---|---|---|---|---|
Industrial - Machinery Industrials | $407.8M | 83.03% | — | 16.11% 15.6M shares | |
Household & Personal Products Consumer Defensive | $42.1M | 8.58% | +$42.1M New | 0.14% 2.6M shares | |
Medical - Care Facilities Healthcare | $21.0M | 4.27% | +$21.0M New | 1.04% 2.5M shares | |
Advertising Agencies Communication Services | $15.5M | 3.16% | — | 1.98% 9.8M shares | |
Hardware, Equipment & Parts Technology | $4.7M | 0.96% | +$4.7M New | 1.28% 70.3K shares |
Changes
Portfolio activity, position movements, and quarter-over-quarter changes in MASON CAPITAL MANAGEMENT LLC's latest filing
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Market Value
Q/Q Change
Net Flows % of MV
Turnover Ratio
New Purchases
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Sold Out Of
Reduced Holdings
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Decreased Positions
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Analytics
Portfolio insights and performance metrics for MASON CAPITAL MANAGEMENT LLC
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