Q1 2026 · 13F-HR
MASON CAPITAL MANAGEMENT LLCholdings as filed
Filed 2026-05-15 · accession 0001104659-26-062410
$612.9M
Reported value
7
Positions
2026-03-31
Period end
The Brief · MASON CAPITAL MANAGEMENT LLC · Q1 2026
AI · grounded in 13F
MASON CAPITAL MANAGEMENT LLC established a new position in NVRI valued at $88.18M. The fund closed out positions in SOLS with a reduction of $30.79M, JBS at $18.83M, and BORR at $8.79M. Other activity included a new position in JELD for $963,337 and a 5.4% increase in shares of ATS.
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 00217Y104 | ATS | ATS CORPORATION | $462.6M | 75.5% | 16,404,170 | Common | SOLE |
| 415864107 | NVRI | ENVIRI CORP | $88.2M | 14.4% | 4,494,536 | Common | SOLE |
| 112463104 | BKD | BROOKDALE SENIOR LIVING INC | $30.6M | 4.99% | 2,233,741 | Common | SOLE |
| 18453H106 | CCO | CLEAR CHANNEL OUTDOOR HLDGS | $23.3M | 3.80% | 9,828,401 | Common | SOLE |
| 75574U101 | RC | READY CAPITAL CORP | $7.0M | 1.14% | 4,319,933 | Common | SOLE |
| 47580P103 | JELD | JELD-WEN HOLDING INC | $963,337 | 0.16% | 776,885 | Common | SOLE |
| 82669G104 | SBNY | SIGNATURE BANK | $260,000 | 0.04% | 400,000 | Common | SOLE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.