MASON CAPITAL MANAGEMENT LLC

Q4 2025 13F-HR Holdings

Location
New York, NY
Holdings as of
12/31/2025
Date filed
2/17/2026
Form type
13F-HR
Num holdings
9
Total value ($000)
$561,605
Net value change ($000)
+70,252 (14.3%)
New positions
4
Sold out positions
1
Turnover %
19.4%
Sector allocation + QoQ delta (equities-only)
Prev filing: 11/14/2025 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q3 2025
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
SOLS 30,790 NEW
ATS 20,856 5.1%
JBS 18,833 NEW
BKD 17,721 84.5%
BORR 8,794 NEW
RC 8,232 NEW
CCO 6,192 39.9%
MLAB 808 17.2%
SBNY 144 55.4%
Top Reduces (Value $000, Stocks/ETFs)
KVUE -42,117 -100.0%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type