Who owns WESTLAKE CORP?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of WLK from SEC Form 13F filings across 357 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 357 institutions disclosed 39.7M shares of WESTLAKE CORP worth $2.90B — about 31% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
357
13F holders
$2.90B
value, 2026 filers
31%
of shares outstanding (39.7M sh)
94
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of WLK's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 3.3M | $240.5M | 0.0% | 2.6% | +7.0% |
| 2 | Capital World Investors | 2.8M | $207.5M | 0.0% | 2.2% | -32.5% |
| 3 | PRICE T ROWE ASSOCIATES INC /MD/ | 2.2M | $161.1M | 0.0% | 1.7% | -8.3% |
| 4 | Orbis Allan Gray Ltd | 2.1M | $152.2M | 0.5% | 1.6% | -60.6% |
| 5 | DIMENSIONAL FUND ADVISORS LP | 2.1M | $149.8M | 0.0% | 1.6% | +39.9% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.8M | $127.9M | 0.0% | 1.4% | -1.0% |
| 7 | BRANDES INVESTMENT PARTNERS, LP | 1.6M | $114.8M | 0.8% | 1.2% | -14.6% |
| 8 | AQR CAPITAL MANAGEMENT LLC | 1.6M | $114.6M | 0.0% | 1.2% | +503.9% |
| 9 | VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | $106.9M | 0.0% | 1.1% | +0.6% |
| 10 | STATE STREET CORP | 1.5M | $106.1M | 0.0% | 1.1% | +5.3% |
| 11 | GOLDMAN SACHS GROUP INC | 1.3M | $93.5M | 0.0% | 1% | -8.1% |
| 12 | CITADEL ADVISORS LLC | 1.1M | $77.0M | 0.0% | 0.8% | +47.4% |
| 13 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1.0M | $74.7M | 0.1% | 0.8% | +8.4% |
| 14 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 817,207 | $59.7M | 0.0% | 0.6% | -16.7% |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 718,597 | $52.5M | 0.0% | 0.6% | +17.0% |
| 16 | JACOBS LEVY EQUITY MANAGEMENT, INC | 709,355 | $51.8M | 0.2% | 0.6% | +103.2% |
| 17 | Balyasny Asset Management L.P. | 625,859 | $45.7M | 0.1% | 0.5% | +69.3% |
| 18 | Woodline Partners LP | 451,986 | $33.0M | 0.1% | 0.4% | +34.1% |
| 19 | Nuveen, LLC | 446,479 | $32.6M | 0.0% | 0.3% | -20.9% |
| 20 | MORGAN STANLEY | 437,571 | $31.9M | 0.0% | 0.3% | -10.1% |
| 21 | UBS Group AG | 431,633 | $31.5M | 0.0% | 0.3% | -46.8% |
| 22 | SCHRODER INVESTMENT MANAGEMENT GROUP | 375,889 | $28.1M | 0.0% | 0.3% | +0.4% |
| 23 | MILLENNIUM MANAGEMENT LLC | 366,074 | $26.7M | 0.0% | 0.3% | +330.7% |
| 24 | FMR LLC | 361,243 | $26.4M | 0.0% | 0.3% | -72.5% |
| 25 | ExodusPoint Capital Management, LPNEW | 327,195 | $23.9M | 0.2% | 0.3% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.