Mason Capital Management LLC 13F holdings, Q2 2025
Holdings as of June 30, 2025 · filings on SEC EDGAR · latest filing →
Mason Capital Management LLC disclosed 4 US equity positions worth $511.5m in its Q2 2025 13F filing. The largest position was ATS at 97.0% of the reported book, followed by CCO and COHEN CIRCLE ACQUISITION CORP. Against the Q1 2025 filing, it opened 0 new positions, added to 0 and reduced 0 among the top 4 holdings.
What did Mason Capital Management LLC own in Q2 2025? Top 4 positions
| # | Stock | Sector | Weight | Value | Shares | Δ shares | vs Q1 2025 |
|---|---|---|---|---|---|---|---|
| 1 | ATS ATS CORPORATION | 97.0% | $496.2m | 15,563,568 | 0% | held | |
| 2 | CCO CLEAR CHANNEL OUTDOOR HLDGS | Communication Services | 2.2% | $11.5m | 9,828,401 | 0% | held |
| 3 | COHEN CIRCLE ACQUISITION CORP | 0.7% | $3.6m | 325,000 | 0% | held | |
| 4 | SBNY SIGNATURE BANK | Financial Services | 0.1% | $300.0k | 400,000 | 0% | held |
Weights are shares of the reported long US equity book (options excluded). Values are as filed, normalised to whole dollars. Share changes compare against the immediately preceding filing only.