MASON CAPITAL MANAGEMENT LLC Quant / Systematic

CIK: 0001218735 · Show all filings

Period: Q3 2025 (← Previous) (Next →)

Filing Date: Nov 14, 2025

Total Value ($000): $491,353 (100.0% shares, 0.0% debt)

Holdings (6)

ATS ATS CORPORATION 83.0%

Value ($000) $407,765 Shares 15,563,568 Est. Cost $41.88 Unrealized -31.2%

KVUE KENVUE INC 8.6%

Value ($000) $42,117 Shares 2,595,000 Est. Cost $20.06 Unrealized 0.0%

BKD BROOKDALE SENIOR LIVING INC 4.3%

Value ($000) $20,971 Shares 2,475,964 Est. Cost $7.62 Unrealized 0.0%

CCO CLEAR CHANNEL OUTDOOR HLDGS 3.2%

Value ($000) $15,529 Shares 9,828,401 Est. Cost $1.96 Unrealized -36.5%

MLAB MESA LABORATORIES INC 1.0%

Value ($000) $4,711 Shares 70,300 Est. Cost $71.72 Unrealized 0.0%

SBNY SIGNATURE BANK 0.1%

Value ($000) $260 Shares 400,000 Est. Cost $2.30 Unrealized -73.0%

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
ATS	ATS CORPORATION	15,563,568	$407,765	83.0%	$41.88	-31.2%	COM	00217Y104
KVUE	KENVUE INC	2,595,000	$42,117	8.6%	$20.06	0.0%	COM	49177J102
BKD	BROOKDALE SENIOR LIVING INC	2,475,964	$20,971	4.3%	$7.62	0.0%	COM	112463104
CCO	CLEAR CHANNEL OUTDOOR HLDGS	9,828,401	$15,529	3.2%	$1.96	-36.5%	COM	18453H106
MLAB	MESA LABORATORIES INC	70,300	$4,711	1.0%	$71.72	0.0%	COM	59064R109
SBNY	SIGNATURE BANK	400,000	$260	0.1%	$2.30	-73.0%	COM	82669G104