Westlake Corp
WLK- Exchange
- NYSE
- Industry
- Industrial Organic Chemicals
- SEC CIK
- 0001262823
In the last 90 days, Westlake Corp insiders filed 0 open-market purchases and 1 sale; 360 institutions reported holding it in 13F filings for Q2 2026, worth $2.90B in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Westlake Corp as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 298
- −1 vs. Q3 2025
- Shares held
- 46.4M
- +4.91M (+11.8%) vs. Q3 2025
- Total value
- $3.43B
- +$234.7M (+7.3%) vs. Q3 2025
- New holders
- 63
- 93 more added
- Sold out
- 64
- 112 more reduced
6 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting WLK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 360 | $2.90B |
| Q1 2026 | 339 | $5.15B |
| Q4 2025 | 298 | $3.43B |
| Q3 2025 | 305 | $3.20B |
| Q2 2025 | 306 | $2.99B |
| Q1 2025 | 361 | $3.64B |
| Q4 2024 | 378 | $4.04B |
| Q3 2024 | 403 | $5.08B |
| Q2 2024 | 382 | $4.93B |
| Q1 2024 | 347 | $5.29B |
| Q4 2023 | 357 | $5.04B |
| Q3 2023 | 335 | $4.64B |
| Q2 2023 | 340 | $4.42B |
| Q1 2023 | 342 | $4.40B |
| Q4 2022 | 344 | $3.73B |
| Q3 2022 | 321 | $3.03B |
| Q2 2022 | 355 | $3.50B |
| Q1 2022 | 328 | $4.38B |
| Q4 2021 | 298 | $3.37B |
| Q3 2021 | 272 | $3.15B |
| Q2 2021 | 276 | $3.02B |
| Q1 2021 | 240 | $3.09B |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Westlake Corp; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −299,728−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −261,562−100.0% | Sold out |
| 1832 Asset Management L.P. | 0 | $0 | 0.00% | −138,920−100.0% | Sold out |
| Impala Asset Management LLC | 0 | $0 | 0.00% | −115,000−100.0% | Sold out |
| Ilex Capital Partners (UK) LLP | 0 | $0 | 0.00% | −110,691−100.0% | Sold out |
| Lloyd Harbor Capital Management, LLC | 0 | $0 | 0.00% | −110,000−100.0% | Sold out |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −100,998−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −100,391−100.0% | Sold out |
| Zimmer Partners, LP | 0 | $0 | 0.00% | −90,000−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −84,884−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −69,220−100.0% | Sold out |
| Concentric Capital Strategies, LP | 0 | $0 | 0.00% | −64,158−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −62,600−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −56,461−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −47,624−100.0% | Sold out |
| Journey Advisory Group, LLC | 0 | $0 | 0.00% | −45,072−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −29,130−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −26,773−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −25,900−100.0% | Sold out |
| Knights of Columbus Asset Advisors LLC | 0 | $0 | 0.00% | −22,364−100.0% | Sold out |
| APG Asset Management N.V. | 0 | $0 | 0.00% | −21,100−100.0% | Sold out |
| Twin Tree Management, LP | 0 | $0 | 0.00% | −16,037−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −12,982−100.0% | Sold out |
| Farringdon Capital, Ltd. | 0 | $0 | 0.00% | −12,529−100.0% | Sold out |
| Exchange Traded Concepts, LLC | 0 | $0 | 0.00% | −12,241−100.0% | Sold out |
| Lighthouse Investment Partners, LLC | 0 | $0 | 0.00% | −11,661−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −9,742−100.0% | Sold out |
| Board of the Pension Protection Fund | 0 | $0 | 0.00% | −9,500−100.0% | Sold out |
| Summit Wealth Group LLC | 0 | $0 | 0.00% | −9,993−100.0% | Sold out |
| Bayesian Capital Management, LP | 0 | $0 | 0.00% | −9,241−100.0% | Sold out |
| Diametric Capital, LP | 0 | $0 | 0.00% | −6,415−100.0% | Sold out |
| Sequent Planning LLC | 0 | $0 | 0.00% | −4,845−100.0% | Sold out |
| Kovitz Investment Group Partners, LLC | 0 | $0 | 0.00% | −4,105−100.0% | Sold out |
| Greenland Capital Management LP | 0 | $0 | 0.00% | −4,008−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −3,861−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −3,678−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −3,673−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −3,329−100.0% | Sold out |
| Wiley Bros.-Aintree Capital, LLC | 0 | $0 | 0.00% | −3,028−100.0% | Sold out |
| McMahon Financial Advisors, LLC | 0 | $0 | 0.00% | −2,916−100.0% | Sold out |
| Voya Investment Management LLC | 0 | $0 | 0.00% | −2,772−100.0% | Sold out |
| Avanza Fonder AB | 0 | $0 | 0.00% | −2,680−100.0% | Sold out |
| ASR Vermogensbeheer N.V. | 0 | $0 | 0.00% | −2,449−100.0% | Sold out |
| Grey Fox Wealth Advisors, LLC | 0 | $0 | 0.00% | −1,154−100.0% | Sold out |
| Itau Unibanco Holding S.A. | 0 | $0 | 0.00% | −497−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −366−100.0% | Sold out |
| Arcadia Investment Management Corp | 0 | $0 | 0.00% | −350−100.0% | Sold out |
| Pathway Financial Advisers, LLC | 0 | $0 | 0.00% | −289−100.0% | Sold out |
| FNY Investment Advisers, LLC | 0 | $0 | 0.00% | −273−100.0% | Sold out |
| CVA Family Office, LLC | 0 | $0 | 0.00% | −120−100.0% | Sold out |
| Bessemer Group Inc | 0 | $0 | 0.00% | −97−100.0% | Sold out |
| Rise Advisors, LLC | 0 | $0 | 0.00% | −83−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −83−100.0% | Sold out |
| Ameritas Advisory Services, LLC | 0 | $0 | 0.00% | −78−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −40−100.0% | Sold out |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −37−100.0% | Sold out |
| Bell Investment Advisors, Inc | 0 | $0 | 0.00% | −18−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| Jackson, Grant Investment Advisers, Inc. | 0 | $0 | 0.00% | −11−100.0% | Sold out |
| Core Alternative Capital | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| New Millennium Group LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Cloud Capital Management, LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | – | – | – | – | Not filed |
| Point72 Hong Kong Ltd | – | – | – | – | Not filed |
| Point72 Asia (Singapore) Pte. Ltd. | – | – | – | – | Not filed |
| Point72 (DIFC) Ltd | – | – | – | – | Not filed |
| Point72 Europe (London) LLP | – | – | – | – | Not filed |
| Hemington Wealth Management | – | – | – | – | Not filed |