13FBOX
MASON CAPITAL MANAGEMENT LLC · 13F Holdings
Options Calculator Rankings

MASON CAPITAL MANAGEMENT LLC

No.3778 Data as of 2026Q2
Latest AUM (Q2 2026)
$607.0M
QoQ Change Q1 2026
-$5.8M-1.0%
Holdings
9
New Buys
2
Adds
2
Reduces
1
Exits
0
Unchanged
4
Holdings Value Trend
Holdings by Sector
Stock Ownership TrendPortfolio %Prev Q %Q2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
AAts Corporation. Ordinary SharesATS
77.78%75.48%$472.1M16.4M$462.6M16.4M00.00%Unchanged
BBROOKDALE SR LIVING INCBKD
6.83%4.99%$41.4M2.6M$30.6M2.2M+342,085+15.31%Add
EENVIRI CORPHA7
6.4%14.39%$38.9M1.8M$88.2M4.5M-2.7M-60.60%Reduce
CCLEAR CHANNEL OUTDOOR HLDGSCCO
3.92%3.8%$23.8M9.8M$23.3M9.8M00.00%Unchanged
GGROUPON INC CLASS AGRPN
2.6%$15.8M657,144$00+657,144New Buy
RREADY CAPITAL CORPRC
1.25%1.14%$7.6M4.3M$7.0M4.3M00.00%Unchanged
JJELD-WEN HLDG INC COMJELD
0.77%0.16%$4.7M3.1M$963,337776,885+2.3M+300.27%Add
CContextlogic Holdings IncLOGC
0.43%$2.6M291,341$00+291,341New Buy
SSIGNATURE BK NEW YORK N YSBNY
0.03%0.04%$180,000400,000$260,000400,00000.00%Unchanged

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow