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Westlake Corp

333 hedge funds and large institutions have $5.15B invested in Westlake Corp in 2026 Q1 according to their latest regulatory filings, with 93 funds opening new positions, 115 increasing their positions, 84 reducing their positions, and 47 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
333
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
3
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$26.7M
Puts
$16.9M
Net Calls
Net Calls Change

Top Buyers

1 +$198M
2 +$105M
3 +$87.9M
4
Goldman Sachs
Goldman Sachs
New York
+$62M
5
Citadel Advisors
Citadel Advisors
Florida
+$49.7M

Top Sellers

1 -$235M
2 -$104M
3 -$51.7M
4
Holocene Advisors
Holocene Advisors
New York
-$47.6M
5
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
-$40.7M
Name Holding Trade Value Shares
Change
Change in
Stake
TF
76
Trek Financial
Arizona
$5.29M
California State Teachers Retirement System (CalSTRS)
77
California State Teachers Retirement System (CalSTRS)
California
$5.19M
OQS
78
Occudo Quantitative Strategies
Florida
$5.12M
AllianceBernstein
79
AllianceBernstein
Tennessee
$4.98M
EGM
80
Engineers Gate Manager
New York
$4.96M
BAMF
81
BI Asset Management Fondsmaeglerselskab
Denmark
$4.91M
Retirement Systems of Alabama
82
Retirement Systems of Alabama
Alabama
$4.78M
Bank of Montreal
83
Bank of Montreal
Ontario, Canada
$4.56M
Squarepoint
84
Squarepoint
New York
$4.5M
CI
85
Capital International
California
$4.36M
Twin Tree Management
86
Twin Tree Management
Texas
$4.2M
Corient Private Wealth
87
Corient Private Wealth
Florida
$4.06M
GAM
88
Gotham Asset Management
New York
$4.04M
VAM
89
Vanguard Asset Management
$3.9M
Manulife (Manufacturers Life Insurance)
90
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$3.89M
Boston Partners
91
Boston Partners
Massachusetts
$3.7M
OCM
92
Occam Crest Management
Connecticut
$3.42M
Ameriprise
93
Ameriprise
Minnesota
$3.33M
Envestnet Asset Management
94
Envestnet Asset Management
Illinois
$3.28M
State of Wisconsin Investment Board
95
State of Wisconsin Investment Board
Wisconsin
$2.95M
California Public Employees Retirement System
96
California Public Employees Retirement System
California
$2.92M
Stifel Financial
97
Stifel Financial
Missouri
$2.91M
SG Americas Securities
98
SG Americas Securities
New York
$2.87M
State Board of Administration of Florida Retirement System
99
State Board of Administration of Florida Retirement System
Florida
$2.82M
QT
100
Quantbot Technologies
New York
$2.8M