Institutions / Mason Capital Management LLC / Activity

Activity — Mason Capital Management LLC

9 moves.

BiggestNew positionsBiggest addsExits
InsidersInstitutions
DateActionCompanyValueShares ΔPosition afterImpact
Q1 2026
as of
NewENVIRI Corp
Common stock
$88.18M+4.5M
4,494,536
14.39% of portfolio
high
Q1 2026
as of
ExitSolstice Advanced Materials Inc.
Common stock
$-30.79M-634K
-100.00%
0
medium
Q1 2026
as of
AddATS Corp /ATS
Common stock
$23.70M+841K
+5.40%
16,404,170
75.48% of portfolio
medium
Q1 2026
as of
ExitN4732M103
Common stock
$-18.83M-1.3M
-100.00%
0
medium
Q1 2026
as of
TrimBrookdale Senior Living Inc.
Common stock
$-18.50M-1.4M
-37.71%
2,233,741
4.99% of portfolio
medium
Q1 2026
as of
ExitG1466R173
Common stock
$-8.79M-2.2M
-100.00%
0
medium
Q1 2026
as of
ExitMesa Laboratories Inc /Co
Common stock
$-5.52M-70K
-100.00%
0
medium
Q1 2026
as of
NewJELD-WEN Holding, Inc.
Common stock
$963.3K+777K
776,885
0.16% of portfolio
low
Q1 2026
as of
AddReady Capital Corporation
Common stock
$880.9K+544K
+14.40%
4,319,933
1.14% of portfolio
low
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