WLK Westlake Corporation
Westlake Corporation (WLK) Institutional Ownership
What the institutions did with WLK last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 3.3M | 7.8% |
| Capital World Investors | 2.8M | 6.7% |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 2.7M | 6.3% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.2M | 5.2% |
| Orbis Allan Gray Ltd | 2.1M | 4.9% |
| DIMENSIONAL FUND ADVISORS LP | 2.1M | 4.8% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.8M | 4.1% |
| BRANDES INVESTMENT PARTNERS, LP | 1.6M | 3.7% |
| AQR CAPITAL MANAGEMENT LLC | 1.6M | 3.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | 3.5% |
| STATE STREET CORP | 1.5M | 3.4% |
| GOLDMAN SACHS GROUP INC | 1.3M | 3.0% |
| CITADEL ADVISORS LLC | 1.1M | 2.5% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1.0M | 2.4% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 817.2K | 1.9% |
| GEODE CAPITAL MANAGEMENT, LLC | 718.6K | 1.7% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 709.4K | 1.7% |
| Balyasny Asset Management L.P. | 625.9K | 1.5% |
| Woodline Partners LP | 452.0K | 1.1% |
| Nuveen, LLC | 446.5K | 1.1% |
| MORGAN STANLEY | 437.6K | 1.0% |
| UBS Group AG | 431.6K | 1.0% |
| SCHRODER INVESTMENT MANAGEMENT GROUP | 375.9K | 0.9% |
| MILLENNIUM MANAGEMENT LLC | 366.1K | 0.9% |
| FMR LLC | 361.2K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Orbis Allan Gray Ltd | Reduced | 5.3M | 2.1M | -3.2M |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 44.5K | 2.7M | +2.6M |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 1.8M | 141.8K | -1.7M |
| Capital World Investors | Reduced | 4.2M | 2.8M | -1.4M |
| AQR CAPITAL MANAGEMENT LLC | Increased | 260.1K | 1.6M | +1.3M |
| FMR LLC | Reduced | 1.3M | 361.2K | -951.2K |
| Holocene Advisors, LP | Sold Out | 730.0K | 0 | -730.0K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 1.5M | 2.1M | +585.5K |
| UBS Group AG | Reduced | 811.3K | 431.6K | -379.6K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Increased | 349.0K | 709.4K | +360.3K |
| CITADEL ADVISORS LLC | Increased | 715.6K | 1.1M | +339.3K |
| ExodusPoint Capital Management, LP | New | 0 | 327.2K | +327.2K |
| Qube Research & Technologies Ltd | New | 0 | 321.7K | +321.7K |
| MILLENNIUM MANAGEMENT LLC | Increased | 85.0K | 366.1K | +281.1K |
| BRANDES INVESTMENT PARTNERS, LP | Reduced | 1.8M | 1.6M | -269.7K |
| NEW YORK STATE COMMON RETIREMENT FUND | Reduced | 309.6K | 40.9K | -268.7K |
| FEDERATED HERMES, INC. | Reduced | 266.7K | 2.6K | -264.1K |
| Balyasny Asset Management L.P. | Increased | 369.7K | 625.9K | +256.2K |
| BlackRock, Inc. | Increased | 3.1M | 3.3M | +215.1K |
| Susquehanna Portfolio Strategies, LLC | Increased | 18.4K | 230.4K | +212.0K |
| Jump Financial, LLC | New | 0 | 209.9K | +209.9K |
| DEPRINCE RACE & ZOLLO INC | Sold Out | 203.4K | 0 | -203.4K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 2.4M | 2.2M | -200.8K |
| Ceredex Value Advisors LLC | Sold Out | 177.9K | 0 | -177.9K |
| Merewether Investment Management, LP | Reduced | 219.9K | 53.4K | -166.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.