Mason Capital Management

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

  • Top 5 stock holdings are ATS, BKD, NVRI, CCO, GRPN, and represent 97.53% of Mason Capital Management's stock portfolio.
  • Added to shares of these 4 stocks: GRPN (+$16M), BKD (+$5.5M), JELD, LOGC.
  • Started 2 new stock positions in LOGC, GRPN.
  • Reduced shares in these 1 stock: NVRI (-$60M).
  • Mason Capital Management was a net seller of stock by $-32M.
  • Mason Capital Management has $607M in assets under management (AUM), dropping by -0.95%.
  • Central Index Key (CIK): 0001218735

Tip: Access up to 7 years of quarterly data

Positions held by Mason Capital Management consolidated in one spreadsheet with up to 7 years of data

Download as csvDownload consolidated filings csv Download as ExcelDownload consolidated filings xlsx

Portfolio Holdings for Mason Capital Management

Mason Capital Management holds 9 positions in its portfolio as reported in the June 2026 quarterly 13F filing

Company (Ticker) Portfolio Weight Valued At Change in Shares Share Count Share Price
Ats (ATS) 77.8 $472M 16M 28.78
 View chart
Brookdale Senior Living (BKD) 6.8 $41M +15% 2.6M 16.09
 View chart
Harsco Corporation (NVRI) 6.4 $39M -60% 1.8M 21.95
 View chart
Clear Channel Outdoor Holdings (CCO) 3.9 $24M 9.8M 2.42
 View chart
Groupon (GRPN) 2.6 $16M NEW 657k 24.06
 View chart
Ready Capital Corp Reit (RC) 1.2 $7.6M 4.3M 1.75
 View chart
Jeld-wen Hldg (JELD) 0.8 $4.7M +300% 3.1M 1.50
 View chart
Contextlogic Hldgs (LOGC) 0.4 $2.6M NEW 291k 8.90
 View chart
Signature Bank (SBNY) 0.0 $180k 400k 0.45
 View chart

Past Filings by Mason Capital Management

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

View all past filings