Mason Capital Management LLC Top Holdings and 13F Report (2026) About Mason Capital Management LLCInvestment ActivityMason Capital Management LLC has $607.02 million in total holdings as of June 30, 2026.Mason Capital Management LLC owns shares of 9 different stocks, but just 2 companies or ETFs make up 80% of its holdings.Approximately 4.52% of the portfolio was purchased this quarter.About 9.85% of the portfolio was sold this quarter.This quarter, Mason Capital Management LLC has purchased 7 new stocks and bought additional shares in 2 stocks.Mason Capital Management LLC sold shares of 1 stock and completely divested from 0 stocks this quarter.Largest Holdings ATS $472,112,013Brookdale Senior Living $41,445,040Enviri $38,872,550Clear Channel Outdoor $23,784,730Groupon $15,810,885 Largest New Holdings this Quarter 399473206 - Groupon $15,810,885 Holding21078F109 - CONTEXTLOGIC HOLDINGS INC $2,592,935 Holding Largest Purchases this Quarter Groupon 657,144 shares (about $15.81M)Brookdale Senior Living 342,085 shares (about $5.50M)JELD-WEN 2,332,736 shares (about $3.50M)CONTEXTLOGIC HOLDINGS INC 291,341 shares (about $2.59M) Largest Sales this Quarter Enviri 2,723,577 shares (about $59.78M) Sector Allocation Over TimeMap of 500 Largest Holdings ofMason Capital Management LLC Selling Neutral Buying Latest 13F Holdings and Changes Since Previous Quarterly FilingIssuer NameHoldings ValueApproximate Purchase/SaleChange in SharesShares Held% of PortfolioSectorATSATS$472,112,0130.0%16,404,17077.8%IndustrialsBKDBrookdale Senior Living$41,445,040$5,504,148 â–²15.3%2,575,8266.8%HealthcareNVRIEnviri$38,872,550$59,782,515 â–¼-60.6%1,770,9596.4%IndustrialsCCOClear Channel Outdoor$23,784,7300.0%9,828,4013.9%Communication ServicesGRPNGroupon$15,810,885$15,810,885 â–²New Holding657,1442.6%Consumer DiscretionaryRCReady Capital$7,559,8830.0%4,319,9331.2%FinanceJELDJELD-WEN$4,664,432$3,499,104 â–²300.3%3,109,6210.8%IndustrialsCONTEXTLOGIC HOLDINGS INC$2,592,935$2,592,935 â–²New Holding291,3410.4%COMSBNYSignature Bank$180,0000.0%400,0000.0%FinanceShowing largest 100 holdings. View all holdings. More Institutional Buying and Selling Information SEC Filings and Trading Data SEC Filings 13F Filings Top 13F Buys Top 13F Sells Unlock superior investment research and tools. Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools and reports. Get MarketBeat All Access MarketBeat All Access Features Best-in-Class Portfolio Monitoring Get personalized stock ideas. Compare portfolio to indices. Check stock news, ratings, SEC filings, and more. Stock Ideas and Recommendations See daily stock ideas from top analysts. Receive short-term trading ideas from MarketBeat. Identify trending stocks on social media. Advanced Stock Screeners and Research Tools Use our seven stock screeners to find suitable stocks. Stay informed with MarketBeat's real-time news. Export data to Excel for personal analysis. Sign in to your free account to enjoy these benefits In-depth profiles and analysis for 20,000 public companies. Real-time analyst ratings, insider transactions, earnings data, and more. Our daily ratings and market update email newsletter. Sign in to your free account to enjoy all that MarketBeat has to offer. Sign In Create Account Your Email Address: Email Address Required Your Password: Password Required Log In Email Me a Login Link or Sign in with Facebook Sign in with Google Forgot your password? Your Email Address: Please enter your email address. Please enter a valid email address Choose a Password: Please enter your password. Your password must be at least 8 characters long and contain at least 1 number, 1 letter, and 1 special character. Create My Account (Free) or Sign in with Facebook Sign in with Google By creating a free account, you agree to our terms of service. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
