MASON CAPITAL MANAGEMENT LLC Quant / Systematic

CIK: 0001218735 · Show all filings

Period: Q4 2025 (← Previous)

Filing Date: Feb 17, 2026

Total Value ($000): $561,605 (100.0% shares, 0.0% debt)

Holdings (9)

New Positions (4)

SOLS SOLSTICE ADV MATERIALS INC 5.5%

Value ($000) $30,790 Shares 633,801 Est. Cost $47.08 Unrealized 0.0%

JBS JBS N.V. 3.4%

Value ($000) $18,833 Shares 1,306,000 Est. Cost $13.74 Unrealized 0.0%

BORR BORR DRILLING LTD 1.6%

Value ($000) $8,794 Shares 2,182,136 Est. Cost $3.31 Unrealized 0.0%

RC READY CAPITAL CORP 1.5%

Value ($000) $8,232 Shares 3,776,139 Est. Cost $2.18 Unrealized —

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
SOLS	SOLSTICE ADV MATERIALS INC	633,801	$30,790	5.5%	$47.08	0.0%	COM	83443Q103
JBS	JBS N.V.	1,306,000	$18,833	3.4%	$13.74	0.0%	CL A SHS	N4732M103
BORR	BORR DRILLING LTD	2,182,136	$8,794	1.6%	$3.31	0.0%	SHS	G1466R173
RC	READY CAPITAL CORP	3,776,139	$8,232	1.5%	$2.18	—	REIT	75574U101

Increased Positions (1)

BKD BROOKDALE SENIOR LIVING INC 6.9%

Value ($000) $38,692 (+84.5%) Shares 3,585,941 (+44.8%) Est. Cost $8.30 Unrealized +18.4%

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
BKD	BROOKDALE SENIOR LIVING INC	3,585,941 (+44.8%)	$38,692 (+84.5%)	6.9%	$8.30	+18.4%	COM	112463104

Exited Positions (1)

KVUE KENVUE INC 7.5%

Value ($000) $42,117 Shares 2,595,000 Est. Cost $20.06 Unrealized -19.0%

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
KVUE	KENVUE INC	2,595,000	$42,117	7.5%	$20.06	-19.0%	—	49177J102

Unchanged Positions (4)

ATS ATS CORPORATION 76.3%

Value ($000) $428,621 Shares 15,563,568 Est. Cost $41.88 Unrealized -36.2%

CCO CLEAR CHANNEL OUTDOOR HLDGS 3.9%

Value ($000) $21,721 Shares 9,828,401 Est. Cost $1.96 Unrealized -5.5%

MLAB MESA LABORATORIES INC 1.0%

Value ($000) $5,519 Shares 70,300 Est. Cost $71.72 Unrealized +5.9%

SBNY SIGNATURE BANK 0.1%

Value ($000) $404 Shares 400,000 Est. Cost $2.30 Unrealized -65.2%

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
ATS	ATS CORPORATION	15,563,568	$428,621	76.3%	$41.88	-36.2%	COM	00217Y104
CCO	CLEAR CHANNEL OUTDOOR HLDGS	9,828,401	$21,721	3.9%	$1.96	-5.5%	COM	18453H106
MLAB	MESA LABORATORIES INC	70,300	$5,519	1.0%	$71.72	+5.9%	COM	59064R109
SBNY	SIGNATURE BANK	400,000	$404	0.1%	$2.30	-65.2%	COM	82669G104