WLK: Westlake Corporation insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Institutional ownership (Q2 2026)
361 institutions reported holding $2.71B of Westlake Corporation on Form 13F (340 the quarter before). 81 opened a new position and 64 sold out. Shares held by institutions: -10%.
| Largest holders | Shares | Value |
|---|---|---|
| BlackRock, Inc. | 3,294,162 | $240.47M |
| Capital World Investors | 2,842,348 | $207.49M |
| Orbis Allan Gray Ltd | 2,084,364 | $152.16M |
| DIMENSIONAL FUND ADVISORS LP | 2,051,554 | $149.78M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1,752,627 | $127.94M |
| BRANDES INVESTMENT PARTNERS, LP | 1,572,939 | $114.83M |
| AQR CAPITAL MANAGEMENT LLC | 1,570,453 | $114.64M |
| VANGUARD CAPITAL MANAGEMENT LLC | 1,464,223 | $106.89M |
| STATE STREET CORP | 1,453,407 | $106.10M |
| GOLDMAN SACHS GROUP INC | 1,280,873 | $93.50M |
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