Filed: 2/17/2026ACC: 0001104659-26-016335
📋 What this filing means
MASON CAPITAL MANAGEMENT LLC filed this quarterly 13F‑HR report disclosing 9 equity positions with a total reported market value of $561.60M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
9
Positions
$561.60M
Total AUM (reported)
37.35M
Total Shares
Allocation by class
COM$525.75M93.6%
CL A SHS$18.83M3.4%
SHS$8.79M1.6%
REIT$8.23M1.5%
Portfolio Concentration
Top 3$498.10M88.7%
4–10$63.50M11.3%
Top 3 weight
88.7%
Top 10 weight
100.0%
Voting Authority Distribution
Total shares with voting rights: 37.35M
Sole
Full voting authority
37.35M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole9
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings9
Rows:
ATS CORPORATION
SOLEShares15.56M
TypeSH
Market value$428.62M
76.32%
Sole
15.56M
Shared
0.00
None
0.00
BROOKDALE SENIOR LIVING INC
SOLEShares3.59M
TypeSH
Market value$38.69M
6.89%
Sole
3.59M
Shared
0.00
None
0.00
SOLSTICE ADV MATERIALS INC
SOLEShares633.80K
TypeSH
Market value$30.79M
5.48%
Sole
633.80K
Shared
0.00
None
0.00
CLEAR CHANNEL OUTDOOR HLDGS
SOLEShares9.83M
TypeSH
Market value$21.72M
3.87%
Sole
9.83M
Shared
0.00
None
0.00
JBS N.V.
SOLEShares1.31M
TypeSH
Market value$18.83M
3.35%
Sole
1.31M
Shared
0.00
None
0.00
BORR DRILLING LTD
SOLEShares2.18M
TypeSH
Market value$8.79M
1.57%
Sole
2.18M
Shared
0.00
None
0.00
READY CAPITAL CORP
SOLEShares3.78M
TypeSH
Market value$8.23M
1.47%
Sole
3.78M
Shared
0.00
None
0.00
MESA LABORATORIES INC
SOLEShares70.30K
TypeSH
Market value$5.52M
0.98%
Sole
70.30K
Shared
0.00
None
0.00
SIGNATURE BANK
SOLEShares400K
TypeSH
Market value$404.0K
0.07%
Sole
400K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
ATS CORPORATIONSOLE | COM | 15.56M | SH | $428.62M 76.32% | 15.56M | 0.00 | 0.00 |
BROOKDALE SENIOR LIVING INCSOLE | COM | 3.59M | SH | $38.69M 6.89% | 3.59M | 0.00 | 0.00 |
SOLSTICE ADV MATERIALS INCSOLE | COM | 633.80K | SH | $30.79M 5.48% | 633.80K | 0.00 | 0.00 |
CLEAR CHANNEL OUTDOOR HLDGSSOLE | COM | 9.83M | SH | $21.72M 3.87% | 9.83M | 0.00 | 0.00 |
JBS N.V.SOLE | CL A SHS | 1.31M | SH | $18.83M 3.35% | 1.31M | 0.00 | 0.00 |
BORR DRILLING LTDSOLE | SHS | 2.18M | SH | $8.79M 1.57% | 2.18M | 0.00 | 0.00 |
READY CAPITAL CORPSOLE | REIT | 3.78M | SH | $8.23M 1.47% | 3.78M | 0.00 | 0.00 |
MESA LABORATORIES INCSOLE | COM | 70.30K | SH | $5.52M 0.98% | 70.30K | 0.00 | 0.00 |
SIGNATURE BANKSOLE | COM | 400K | SH | $404.0K 0.07% | 400K | 0.00 | 0.00 |