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MASON CAPITAL MANAGEMENT LLC

AUM: $1.96 B

13-F Portfolio Value: $612.85 M

Last 13-F Filed: Q1 2026

Concentration in top 10: 100%

Stock	Company	% Portfolio	Shares Held	Market Value	Change in Shares	% Change	Quarter End Price	Source
ATS	ATS CORPORATION	73.33%	16,404,170	$462,597,594	840,602	5.4%	$28.2	13F
RC	READY CAPITAL CORP	1.11%	4,319,933	$6,998,291	543,794	14.4%	$1.62	13F