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MASON CAPITAL MANAGEMENT LLC

AUM: $1.96 B

13-F Portfolio Value: $491.35 M

Last 13-F Filed: Q3 2025

Concentration in top 10: 100%

Stock	Company	% Portfolio	Shares Held	Market Value	% Change	Quarter End Price	Source
ATS	ATS CORPORATION	82.99%	15,563,568	$407,765,482	No Change	$26.2	13F
CCO	CLEAR CHANNEL OUTDOOR HLDGS	3.16%	9,828,401	$15,528,874	No Change	$1.58	13F
SBNY	SIGNATURE BANK	0.05%	400,000	$260,000	No Change	$0.65	13F