Mason Capital Management
Latest statistics and disclosures from Mason Capital Management's latest quarterly 13F-HR filing:
- Top 5 stock holdings are ATS, NVRI, BKD, CCO, RC, and represent 99.80% of Mason Capital Management's stock portfolio.
- Added to shares of these 4 stocks: NVRI (+$88M), ATS (+$24M), JELD, RC.
- Started 2 new stock positions in NVRI, JELD.
- Reduced shares in these 5 stocks: SOLS (-$31M), JBS (-$19M), BKD (-$19M), BORR (-$8.8M), .
- Sold out of its positions in MLAB, SOLS, BORR, JBS.
- Mason Capital Management was a net buyer of stock by $31M.
- Mason Capital Management has $613M in assets under management (AUM), dropping by 9.13%.
- Central Index Key (CIK): 0001218735
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Portfolio Holdings for Mason Capital Management
Mason Capital Management holds 7 positions in its portfolio as reported in the March 2026 quarterly 13F filing
| Company (Ticker) | Portfolio Weight | Valued At | Change in Shares | Share Count | Share Price | |
|---|---|---|---|---|---|---|
| Ats (ATS) | 75.5 | $463M | +5% | 16M | 28.20 |
|
| Harsco Corporation (NVRI) | 14.4 | $88M | NEW | 4.5M | 19.62 |
|
| Brookdale Senior Living (BKD) | 5.0 | $31M | -37% | 2.2M | 13.68 |
|
| Clear Channel Outdoor Holdings (CCO) | 3.8 | $23M | 9.8M | 2.37 |
|
|
| Ready Capital Corp Reit (RC) | 1.1 | $7.0M | +14% | 4.3M | 1.62 |
|
| Jeld-wen Hldg (JELD) | 0.2 | $963k | NEW | 777k | 1.24 |
|
| Signature Bank (SBNY) | 0.0 | $260k | 400k | 0.65 |
|
Past Filings by Mason Capital Management
SEC 13F filings are viewable for Mason Capital Management going back to 2010
- Mason Capital Management 2026 Q1 filed May 15, 2026
- Mason Capital Management 2025 Q4 filed Feb. 17, 2026
- Mason Capital Management 2025 Q3 filed Nov. 14, 2025
- Mason Capital Management 2025 Q2 filed Aug. 14, 2025
- Mason Capital Management 2025 Q1 filed May 15, 2025
- Mason Capital Management 2024 Q4 filed Feb. 14, 2025
- Mason Capital Management 2024 Q3 filed Nov. 14, 2024
- Mason Capital Management 2024 Q2 filed Aug. 14, 2024
- Mason Capital Management 2024 Q1 filed May 15, 2024
- Mason Capital Management 2023 Q4 filed Feb. 15, 2024
- Mason Capital Management 2023 Q3 filed Nov. 14, 2023
- Mason Capital Management 2023 Q2 filed Aug. 14, 2023
- Mason Capital Management 2023 Q1 filed May 15, 2023
- Mason Capital Management 2022 Q4 filed Feb. 14, 2023
- Mason Capital Management 2022 Q3 filed Nov. 14, 2022
- Mason Capital Management 2022 Q2 filed Aug. 15, 2022