Mason Capital Management

Latest statistics and disclosures from Mason Capital Management's latest quarterly 13F-HR filing:

  • Top 5 stock holdings are ATS, BKD, SOLS, CCO, JBS, and represent 95.91% of Mason Capital Management's stock portfolio.
  • Added to shares of these 5 stocks: SOLS (+$31M), JBS (+$19M), BKD (+$12M), BORR (+$8.8M), RC (+$8.2M).
  • Started 4 new stock positions in SOLS, BORR, JBS, RC.
  • Reduced shares in these 1 stock: KVUE (-$42M).
  • Sold out of its position in KVUE.
  • Mason Capital Management was a net buyer of stock by $37M.
  • Mason Capital Management has $562M in assets under management (AUM), dropping by 14.30%.
  • Central Index Key (CIK): 0001218735

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Portfolio Holdings for Mason Capital Management

Mason Capital Management holds 9 positions in its portfolio as reported in the December 2025 quarterly 13F filing

Company (Ticker) Portfolio Weight Valued At Change in Shares Share Count Share Price
Ats (ATS) 76.3 $429M 16M 27.54
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Brookdale Senior Living (BKD) 6.9 $39M +44% 3.6M 10.79
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Solstice Advanced Matls (SOLS) 5.5 $31M NEW 634k 48.58
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Clear Channel Outdoor Holdings (CCO) 3.9 $22M 9.8M 2.21
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JBS Cl A Shs (JBS) 3.4 $19M NEW 1.3M 14.42
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Borr Drilling SHS (BORR) 1.6 $8.8M NEW 2.2M 4.03
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Ready Capital Corp Reit (RC) 1.5 $8.2M NEW 3.8M 2.18
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Mesa Laboratories (MLAB) 1.0 $5.5M 70k 78.50
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Signature Bank (SBNY) 0.1 $404k 400k 1.01
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Past Filings by Mason Capital Management

SEC 13F filings are viewable for Mason Capital Management going back to 2010

View all past filings