MASON CAPITAL MANAGEMENT LLC
CIK: 0001218735SEC EDGAR →
Portfolio Value
$561.6M
Holdings
9
As of
Q4 2025
New Positions
3
Closed Positions
1
Portfolio Value History
Top 10 Holdings
| Rank | Stock | Shares | Value | % of Portfolio |
|---|---|---|---|---|
| 1 | ATS CORPORATION | 15,563,568 | $428.6M | 76.32% |
| 2 | BROOKDALE SENIOR LIVING INC | 3,585,941 | $38.7M | 6.89% |
| 3 | SOLSTICE ADV MATERIALS INC | 633,801 | $30.8M | 5.48% |
| 4 | CLEAR CHANNEL OUTDOOR HLDGS | 9,828,401 | $21.7M | 3.87% |
| 5 | JBS N.V. | 1,306,000 | $18.8M | 3.35% |
| 6 | BORR DRILLING LTD | 2,182,136 | $8.8M | 1.57% |
| 7 | READY CAPITAL CORP | 3,776,139 | $8.2M | 1.47% |
| 8 | MESA LABORATORIES INC | 70,300 | $5.5M | 0.98% |
| 9 | SIGNATURE BANK | 400,000 | $404K | 0.07% |
Quarterly Changes
Sector Breakdown
| Sector | # Holdings | Value | % |
|---|---|---|---|
| Industrials | 1 | $428.6M | 76.3% |
| Unknown | 2 | $39.1M | 7.0% |
| Basic Materials | 1 | $30.8M | 5.5% |
| Communication Services | 1 | $21.7M | 3.9% |
| Consumer Defensive | 1 | $18.8M | 3.4% |
| Energy | 1 | $8.8M | 1.6% |
| Real Estate | 1 | $8.2M | 1.5% |
| Technology | 1 | $5.5M | 1.0% |