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, Q3 2025
Institutional positions in Westlake Corp as of Sep 30, 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
- 305
- +4 vs. Q2 2025
- Shares held
- 41.6M
- +3.59M (+9.4%) vs. Q2 2025
- Total value
- $3.20B
- +$316.4M (+11.0%) vs. Q2 2025
- New holders
- 58
- 102 more added
- Sold out
- 54
- 106 more reduced
5 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Westlake Corp; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Price T Rowe Associates Inc | 2,208,143 | $170.2M | 0.02% | +149,555+7.3% | Added |
| Victory Capital Management Inc | 2,866,360 | $220.9M | 0.14% | −855,382−23.0% | Reduced |
| BlackRock, Inc. | 3,185,736 | $245.5M | 0.00% | −142,960−4.3% | Reduced |
| Vanguard Group Inc | 3,439,631 | $265.1M | 0.00% | −83,179−2.4% | Reduced |
| Orbis Allan Gray Ltd | 3,914,411 | $301.6M | 1.29% | +3,914,411 | New |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −351,011−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −134,571−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −124,176−100.0% | Sold out |
| ING Groep NV | 0 | $0 | 0.00% | −111,400−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −90,578−100.0% | Sold out |
| JCP Investment Management, LLC | 0 | $0 | 0.00% | −53,000−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −32,522−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −26,000−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −25,833−100.0% | Sold out |
| Royal London Asset Management Ltd | 0 | $0 | 0.00% | −15,513−100.0% | Sold out |
| Ambassador Advisors, LLC | 0 | $0 | 0.00% | −14,265−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −11,704−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −11,392−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −11,380−100.0% | Sold out |
| Standard Life Aberdeen plc | 0 | $0 | 0.00% | −10,098−100.0% | Sold out |
| Sumitomo Mitsui Trust Holdings, Inc. | 0 | $0 | 0.00% | −9,817−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −9,377−100.0% | Sold out |
| Healthcare of Ontario Pension Plan Trust Fund | 0 | $0 | 0.00% | −8,800−100.0% | Sold out |
| FORA Capital, LLC | 0 | $0 | 0.00% | −7,832−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −7,169−100.0% | Sold out |
| First Eagle Investment Management, LLC | 0 | $0 | 0.00% | −6,885−100.0% | Sold out |
| Landscape Capital Management, L.L.C. | 0 | $0 | 0.00% | −6,646−100.0% | Sold out |
| Neo Ivy Capital Management | 0 | $0 | 0.00% | −5,318−100.0% | Sold out |
| Kestra Investment Management, LLC | 0 | $0 | 0.00% | −3,951−100.0% | Sold out |
| Quantessence Capital LLC | 0 | $0 | 0.00% | −4,908−100.0% | Sold out |
| QRG Capital Management, Inc. | 0 | $0 | 0.00% | −4,307−100.0% | Sold out |
| Captrust Financial Advisors | 0 | $0 | 0.00% | −4,129−100.0% | Sold out |
| Catalyst Funds Management Pty Ltd | 0 | $0 | 0.00% | −3,905−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −3,851−100.0% | Sold out |
| Vident Advisory, LLC | 0 | $0 | 0.00% | −3,813−100.0% | Sold out |
| Empowered Funds, LLC | 0 | $0 | 0.00% | −3,449−100.0% | Sold out |
| Applied Finance Capital Management, LLC | 0 | $0 | 0.00% | −3,277−100.0% | Sold out |
| Capula Management Ltd | 0 | $0 | 0.00% | −3,167−100.0% | Sold out |
| Crossmark Global Holdings, Inc. | 0 | $0 | 0.00% | −2,712−100.0% | Sold out |
| Deutsche Bank AG | 0 | $0 | 0.00% | −1,561−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −1,151−100.0% | Sold out |
| Wahed Invest LLC | 0 | $0 | 0.00% | −907−100.0% | Sold out |
| Binnacle Investments Inc | 0 | $0 | 0.00% | −150−100.0% | Sold out |
| Northwestern Mutual Wealth Management Co | 0 | $0 | 0.00% | −140−100.0% | Sold out |
| Bryn Mawr Trust Co | 0 | $0 | 0.00% | −79−100.0% | Sold out |
| Natixis | 0 | $0 | 0.00% | −62−100.0% | Sold out |
| Cetera Trust Company, N.A | 0 | $0 | 0.00% | −40−100.0% | Sold out |
| Koesten, Hirschmann & Crabtree, INC. | 0 | $0 | 0.00% | −33−100.0% | Sold out |
| Thurston, Springer, Miller, Herd & Titak, Inc. | 0 | $0 | 0.00% | −29−100.0% | Sold out |
| Park Square Financial Group, LLC | 0 | $0 | 0.00% | −27−100.0% | Sold out |
| Sound Income Strategies, LLC | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| Hughes Financial Services, LLC | 0 | $0 | 0.00% | −14−100.0% | Sold out |
| Bellwether Advisors, LLC | 0 | $0 | 0.00% | −13−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| Essential Partners LLC | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| WealthTrak Capital Management LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| JFS Wealth Advisors, LLC | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Whittier Trust Co of Nevada Inc | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Mount Yale Investment Advisors, LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| Norges Bank | – | – | – | – | Not filed |
| Northeast Financial Consultants Inc | – | – | – | – | Not filed |
| Total Wealth Planning & Management, Inc. | – | – | – | – | Not filed |
| First Horizon Advisors, Inc. | – | – | – | – | Not filed |
| Parkworth Wealth Management, Inc. | – | – | – | – | Not filed |