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 |
|---|---|---|---|---|---|
| KBC Group NV | 27,556 | $2.12M | 0.01% | −20,458−42.6% | Reduced |
| Envestnet Asset Management Inc | 27,446 | $2.12M | 0.00% | +7,050+34.6% | Added |
| Occudo Quantitative Strategies LP | 27,412 | $2.11M | 0.26% | +12,287+81.2% | Added |
| Verition Fund Management LLC | 27,155 | $2.09M | 0.01% | −14,768−35.2% | Reduced |
| Renaissance Technologies LLC | 25,900 | $2.00M | 0.00% | −118,300−82.0% | Reduced |
| Mackenzie Financial Corp | 25,320 | $1.95M | 0.00% | +25,320 | New |
| Point72 Hong Kong Ltd | 24,871 | $1.92M | 0.09% | +24,871 | New |
| State Board of Administration of Florida Retirement System | 24,115 | $1.86M | 0.00% | −535−2.2% | Reduced |
| South Dakota Investment Council | 22,435 | $1.73M | 0.03% | +300+1.4% | Added |
| Knights of Columbus Asset Advisors LLC | 22,364 | $1.72M | 0.10% | 00.0% | Unchanged |
| Gotham Asset Management, LLC | 22,065 | $1.70M | 0.01% | +9,989+82.7% | Added |
| PDT Partners, LLC | 19,520 | $1.50M | 0.09% | +19,520 | New |
| Dana Investment Advisors, Inc. | 19,197 | $1.48M | 0.04% | −586−3.0% | Reduced |
| Ameritas Investment Partners, Inc. | 18,640 | $1.44M | 0.04% | +7,066+61.1% | Added |
| American Century Companies Inc | 18,111 | $1.40M | 0.00% | +55+0.3% | Added |
| Recurrent Investment Advisors LLC | 18,106 | $1.40M | 0.11% | +20.0% | Added |
| APG Asset Management N.V. | 21,100 | $1.38M | 0.00% | 00.0% | Unchanged |
| MetLife Investment Management | 17,138 | $1.32M | 0.01% | −816−4.5% | Reduced |
| Stifel Financial Corp | 16,763 | $1.29M | 0.00% | +4,406+35.7% | Added |
| Polymer Capital Management (US) LLC | 16,200 | $1.25M | 0.17% | +2,140+15.2% | Added |
| Twin Tree Management, LP | 16,037 | $1.24M | 0.06% | −13,323−45.4% | Reduced |
| Mutual of America Capital Management LLC | 15,400 | $1.19M | 0.01% | −1,181−7.1% | Reduced |
| Amalgamated Bank | 15,302 | $1.18M | 0.01% | +64+0.4% | Added |
| Great West Life Assurance Co | 15,207 | $1.17M | 0.00% | 00.0% | Unchanged |
| Treasurer of the State of North Carolina | 15,022 | $1.16M | 0.00% | −586−3.8% | Reduced |
| SEI Investments Co | 14,767 | $1.14M | 0.00% | −7,979−35.1% | Reduced |
| Creative Planning | 13,329 | $1.03M | 0.00% | +2,164+19.4% | Added |
| Summit Trail Advisors, LLC | 13,170 | $1.01M | 0.01% | +8,662+192.1% | Added |
| Jane Street Group, LLC | 12,982 | $1.00M | 0.00% | −21,375−62.2% | Reduced |
| Farringdon Capital, Ltd. | 12,529 | $965.5K | 0.25% | +12,529 | New |
| Jain Global LLC | 12,417 | $956.9K | 0.01% | +12,417 | New |
| LPL Financial LLC | 12,369 | $953.1K | 0.00% | −8,904−41.9% | Reduced |
| Exchange Traded Concepts, LLC | 12,241 | $943.3K | 0.01% | +12,241 | New |
| Lighthouse Investment Partners, LLC | 11,661 | $898.6K | 0.03% | +11,661 | New |
| Yousif Capital Management, LLC | 11,217 | $864.4K | 0.01% | −651−5.5% | Reduced |
| Public Employees Retirement System of Ohio | 10,438 | $804.4K | 0.00% | +65+0.6% | Added |
| Scientech Research LLC | 9,742 | $750.7K | 0.26% | +9,742 | New |
| Board of the Pension Protection Fund | 9,500 | $732.1K | 0.72% | +9,500 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 9,473 | $730.0K | 0.00% | +577+6.5% | Added |
| JustInvest LLC | 9,344 | $720.0K | 0.01% | −701−7.0% | Reduced |
| Louisiana State Employees Retirement System | 9,300 | $716.7K | 0.01% | −100−1.1% | Reduced |
| Summit Wealth Group LLC | 9,993 | $713.2K | 0.10% | +9,993 | New |
| Bayesian Capital Management, LP | 9,241 | $712.1K | 0.15% | +9,241 | New |
| Pathstone Holdings, LLC | 9,004 | $693.8K | 0.00% | +20.0% | Added |
| Susquehanna International Group, LLP | 8,844 | $681.5K | 0.00% | −321,970−97.3% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 8,558 | $659.5K | 0.00% | −9−0.1% | Reduced |
| Handelsbanken Fonder AB | 8,500 | $655.0K | 0.00% | 00.0% | Unchanged |
| State of Michigan Retirement System | 7,900 | $608.8K | 0.00% | −100−1.3% | Reduced |
| Quadrant Capital Group LLC | 7,891 | $608.1K | 0.02% | −52−0.7% | Reduced |
| Thrivent Financial for Lutherans | 7,661 | $590.0K | 0.00% | −189−2.4% | Reduced |
| Advisors Asset Management, Inc. | 7,621 | $587.3K | 0.01% | −26−0.3% | Reduced |
| Northwestern Mutual Investment Management Company, LLC | 7,432 | $572.7K | 0.01% | −12−0.2% | Reduced |
| Brevan Howard Capital Management LP | 7,406 | $570.7K | 0.01% | −19,406−72.4% | Reduced |
| New Mexico Educational Retirement Board | 7,000 | $539.0K | 0.02% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 6,983 | $538.1K | 0.01% | +6,870+6,079.6% | Added |
| RiverFront Investment Group, LLC | 6,972 | $537.3K | 0.01% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 6,939 | $535.0K | 0.00% | −47,566−87.3% | Reduced |
| Pettee Investors, Inc. | 6,711 | $517.1K | 0.28% | 00.0% | Unchanged |
| Oregon Public Employees Retirement Fund | 6,668 | $513.8K | 0.01% | −200−2.9% | Reduced |
| Diametric Capital, LP | 6,415 | $494.3K | 0.18% | +6,415 | New |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 6,352 | $489.5K | 0.00% | −386−5.7% | Reduced |
| Pacer Advisors, Inc. | 6,010 | $463.1K | 0.00% | +6,010 | New |
| Entropy Technologies, LP | 5,817 | $448.3K | 0.03% | −1,838−24.0% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 5,684 | $438.0K | 0.00% | +664+13.2% | Added |
| Point72 Asia (Singapore) Pte. Ltd. | 5,474 | $421.8K | 0.07% | +5,474 | New |
| New York State Teachers Retirement System | 5,225 | $403.0K | 0.00% | 00.0% | Unchanged |
| Canada Pension Plan Investment Board | 5,210 | $401.5K | 0.00% | −44,134−89.4% | Reduced |
| Unison Advisors LLC | 5,180 | $399.2K | 0.04% | +34+0.7% | Added |
| State of Tennessee, Treasury Department | 5,013 | $386.3K | 0.00% | 00.0% | Unchanged |
| Sequent Planning LLC | 4,845 | $373.4K | 0.11% | −67−1.4% | Reduced |
| Raymond James Financial Inc | 4,756 | $366.5K | 0.00% | −542−10.2% | Reduced |
| Cetera Investment Advisers | 4,681 | $360.8K | 0.00% | +331+7.6% | Added |
| CIBC Asset Management Inc | 4,379 | $337.4K | 0.00% | +9+0.2% | Added |
| Mercer Global Advisors Inc | 4,241 | $326.8K | 0.00% | −1,029−19.5% | Reduced |
| Manning & Napier Advisors LLC | 4,188 | $322.7K | 0.00% | −16,496−79.8% | Reduced |
| Ci Investments Inc. | 4,184 | $322.0K | 0.00% | −3,511−45.6% | Reduced |
| Gamco Investors, Inc. Et Al | 4,141 | $319.1K | 0.00% | −7,425−64.2% | Reduced |
| Kovitz Investment Group Partners, LLC | 4,105 | $316.3K | 0.00% | −1,671−28.9% | Reduced |
| Daiwa Securities Group Inc. | 3,991 | $308.0K | 0.00% | +3,991 | New |
| CWM Advisors, LLC | 3,992 | $307.6K | 0.03% | +295+8.0% | Added |
| Greenland Capital Management LP | 4,008 | $304.3K | 0.04% | 00.0% | Unchanged |
| Point72 (DIFC) Ltd | 3,935 | $303.2K | 0.02% | +3,935 | New |
| LMR Partners LLP | 3,861 | $297.5K | 0.00% | 00.0% | Unchanged |
| Atria Investments LLC | 3,833 | $295.4K | 0.00% | +834+27.8% | Added |
| Xponance, Inc. | 3,739 | $288.1K | 0.00% | −1,056−22.0% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 3,699 | $285.0K | 0.00% | +3,699 | New |
| Prudential Financial Inc | 3,678 | $283.4K | 0.00% | −110−2.9% | Reduced |
| Walleye Trading LLC | 3,673 | $283.0K | 0.00% | +3,673 | New |
| State of Alaska, Department of Revenue | 3,649 | $281.0K | 0.00% | −24,029−86.8% | Reduced |
| Advisor Group Holdings, Inc. | 3,258 | $274.0K | 0.00% | −159−4.7% | Reduced |
| Sanctuary Advisors, LLC | 3,549 | $273.5K | 0.00% | +3,549 | New |
| DekaBank Deutsche Girozentrale | 3,540 | $270.0K | 0.00% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 3,496 | $269.4K | 0.00% | +3,496 | New |
| Magnetar Financial LLC | 3,329 | $256.5K | 0.00% | −3,858−53.7% | Reduced |
| Federated Hermes, Inc. | 3,029 | $233.4K | 0.00% | +1,722+131.8% | Added |
| Wiley Bros.-Aintree Capital, LLC | 3,028 | $233.3K | 0.00% | +3,028 | New |
| Claret Asset Management Corp | 3,014 | $232.0K | 0.03% | −43−1.4% | Reduced |
| McMahon Financial Advisors, LLC | 2,916 | $224.7K | 0.05% | +30+1.0% | Added |
| Voya Investment Management LLC | 2,772 | $213.6K | 0.00% | −943−25.4% | Reduced |
| Avanza Fonder AB | 2,680 | $206.5K | 0.01% | 00.0% | Unchanged |