Filed: 8/14/2025ACC: 0001104659-25-078546
📋 What this filing means
MASON CAPITAL MANAGEMENT LLC filed this quarterly 13F‑HR report disclosing 4 equity positions with a total reported market value of $511.53M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
4
Positions
$511.53M
Total AUM (reported)
26.12M
Total Shares
Allocation by class
COM$507.97M99.3%
SHS CL A$3.57M0.7%
Portfolio Concentration
Top 3$511.23M99.9%
4–10$300.0K0.1%
Top 3 weight
99.9%
Top 10 weight
100.0%
Voting Authority Distribution
Total shares with voting rights: 26.12M
Sole
Full voting authority
26.12M
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)
Sole4
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings4
Rows:
ATS CORPORATION
SOLEShares15.56M
TypeSH
Market value$496.17M
97.00%
Sole
15.56M
Shared
0.00
None
0.00
CLEAR CHANNEL OUTDOOR HLDGS
SOLEShares9.83M
TypeSH
Market value$11.50M
2.25%
Sole
9.83M
Shared
0.00
None
0.00
COHEN CIRCLE ACQUISITION CORP
SOLEShares325K
TypeSH
Market value$3.57M
0.70%
Sole
325K
Shared
0.00
None
0.00
SIGNATURE BANK
SOLEShares400K
TypeSH
Market value$300.0K
0.06%
Sole
400K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
ATS CORPORATIONSOLE | COM | 15.56M | SH | $496.17M 97.00% | 15.56M | 0.00 | 0.00 |
CLEAR CHANNEL OUTDOOR HLDGSSOLE | COM | 9.83M | SH | $11.50M 2.25% | 9.83M | 0.00 | 0.00 |
COHEN CIRCLE ACQUISITION CORPSOLE | SHS CL A | 325K | SH | $3.57M 0.70% | 325K | 0.00 | 0.00 |
SIGNATURE BANKSOLE | COM | 400K | SH | $300.0K 0.06% | 400K | 0.00 | 0.00 |