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 |
|---|---|---|---|---|---|
| Federation des caisses Desjardins du Quebec | 2,187 | $168.5K | 0.00% | +1,997+1,051.1% | Added |
| CoreFirst Bank & Trust | 2,250 | $173.4K | 0.09% | +830+58.5% | Added |
| Securian Asset Management, Inc | 2,403 | $185.2K | 0.00% | −100−4.0% | Reduced |
| US Bancorp | 2,433 | $187.5K | 0.00% | −192−7.3% | Reduced |
| ASR Vermogensbeheer N.V. | 2,449 | $188.7K | 0.00% | −28−1.1% | Reduced |
| Avanza Fonder AB | 2,680 | $206.5K | 0.01% | 00.0% | Unchanged |
| Voya Investment Management LLC | 2,772 | $213.6K | 0.00% | −943−25.4% | Reduced |
| McMahon Financial Advisors, LLC | 2,916 | $224.7K | 0.05% | +30+1.0% | Added |
| Claret Asset Management Corp | 3,014 | $232.0K | 0.03% | −43−1.4% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 3,028 | $233.3K | 0.00% | +3,028 | New |
| Federated Hermes, Inc. | 3,029 | $233.4K | 0.00% | +1,722+131.8% | Added |
| Magnetar Financial LLC | 3,329 | $256.5K | 0.00% | −3,858−53.7% | Reduced |
| Hudson Bay Capital Management LP | 3,496 | $269.4K | 0.00% | +3,496 | New |
| DekaBank Deutsche Girozentrale | 3,540 | $270.0K | 0.00% | 00.0% | Unchanged |
| Sanctuary Advisors, LLC | 3,549 | $273.5K | 0.00% | +3,549 | New |
| Advisor Group Holdings, Inc. | 3,258 | $274.0K | 0.00% | −159−4.7% | Reduced |
| State of Alaska, Department of Revenue | 3,649 | $281.0K | 0.00% | −24,029−86.8% | Reduced |
| Walleye Trading LLC | 3,673 | $283.0K | 0.00% | +3,673 | New |
| Prudential Financial Inc | 3,678 | $283.4K | 0.00% | −110−2.9% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 3,699 | $285.0K | 0.00% | +3,699 | New |
| Xponance, Inc. | 3,739 | $288.1K | 0.00% | −1,056−22.0% | Reduced |
| Atria Investments LLC | 3,833 | $295.4K | 0.00% | +834+27.8% | Added |
| LMR Partners LLP | 3,861 | $297.5K | 0.00% | 00.0% | Unchanged |
| Point72 (DIFC) Ltd | 3,935 | $303.2K | 0.02% | +3,935 | New |
| Greenland Capital Management LP | 4,008 | $304.3K | 0.04% | 00.0% | Unchanged |
| CWM Advisors, LLC | 3,992 | $307.6K | 0.03% | +295+8.0% | Added |
| Daiwa Securities Group Inc. | 3,991 | $308.0K | 0.00% | +3,991 | New |
| Kovitz Investment Group Partners, LLC | 4,105 | $316.3K | 0.00% | −1,671−28.9% | Reduced |
| Gamco Investors, Inc. Et Al | 4,141 | $319.1K | 0.00% | −7,425−64.2% | Reduced |
| Ci Investments Inc. | 4,184 | $322.0K | 0.00% | −3,511−45.6% | Reduced |
| Manning & Napier Advisors LLC | 4,188 | $322.7K | 0.00% | −16,496−79.8% | Reduced |
| Mercer Global Advisors Inc | 4,241 | $326.8K | 0.00% | −1,029−19.5% | Reduced |
| CIBC Asset Management Inc | 4,379 | $337.4K | 0.00% | +9+0.2% | Added |
| Cetera Investment Advisers | 4,681 | $360.8K | 0.00% | +331+7.6% | Added |
| Raymond James Financial Inc | 4,756 | $366.5K | 0.00% | −542−10.2% | Reduced |
| Sequent Planning LLC | 4,845 | $373.4K | 0.11% | −67−1.4% | Reduced |
| State of Tennessee, Treasury Department | 5,013 | $386.3K | 0.00% | 00.0% | Unchanged |
| Unison Advisors LLC | 5,180 | $399.2K | 0.04% | +34+0.7% | Added |
| Canada Pension Plan Investment Board | 5,210 | $401.5K | 0.00% | −44,134−89.4% | Reduced |
| New York State Teachers Retirement System | 5,225 | $403.0K | 0.00% | 00.0% | Unchanged |
| Point72 Asia (Singapore) Pte. Ltd. | 5,474 | $421.8K | 0.07% | +5,474 | New |
| Police & Firemen's Retirement System of New Jersey | 5,684 | $438.0K | 0.00% | +664+13.2% | Added |
| Entropy Technologies, LP | 5,817 | $448.3K | 0.03% | −1,838−24.0% | Reduced |
| Pacer Advisors, Inc. | 6,010 | $463.1K | 0.00% | +6,010 | New |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 6,352 | $489.5K | 0.00% | −386−5.7% | Reduced |
| Diametric Capital, LP | 6,415 | $494.3K | 0.18% | +6,415 | New |
| Oregon Public Employees Retirement Fund | 6,668 | $513.8K | 0.01% | −200−2.9% | Reduced |
| Pettee Investors, Inc. | 6,711 | $517.1K | 0.28% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 6,939 | $535.0K | 0.00% | −47,566−87.3% | Reduced |
| RiverFront Investment Group, LLC | 6,972 | $537.3K | 0.01% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 6,983 | $538.1K | 0.01% | +6,870+6,079.6% | Added |
| New Mexico Educational Retirement Board | 7,000 | $539.0K | 0.02% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 7,406 | $570.7K | 0.01% | −19,406−72.4% | Reduced |
| Northwestern Mutual Investment Management Company, LLC | 7,432 | $572.7K | 0.01% | −12−0.2% | Reduced |
| Advisors Asset Management, Inc. | 7,621 | $587.3K | 0.01% | −26−0.3% | Reduced |
| Thrivent Financial for Lutherans | 7,661 | $590.0K | 0.00% | −189−2.4% | Reduced |
| Quadrant Capital Group LLC | 7,891 | $608.1K | 0.02% | −52−0.7% | Reduced |
| State of Michigan Retirement System | 7,900 | $608.8K | 0.00% | −100−1.3% | Reduced |
| Handelsbanken Fonder AB | 8,500 | $655.0K | 0.00% | 00.0% | Unchanged |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 8,558 | $659.5K | 0.00% | −9−0.1% | Reduced |
| Susquehanna International Group, LLP | 8,844 | $681.5K | 0.00% | −321,970−97.3% | Reduced |
| Pathstone Holdings, LLC | 9,004 | $693.8K | 0.00% | +20.0% | Added |
| Bayesian Capital Management, LP | 9,241 | $712.1K | 0.15% | +9,241 | New |
| Summit Wealth Group LLC | 9,993 | $713.2K | 0.10% | +9,993 | New |
| Louisiana State Employees Retirement System | 9,300 | $716.7K | 0.01% | −100−1.1% | Reduced |
| JustInvest LLC | 9,344 | $720.0K | 0.01% | −701−7.0% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 9,473 | $730.0K | 0.00% | +577+6.5% | Added |
| Board of the Pension Protection Fund | 9,500 | $732.1K | 0.72% | +9,500 | New |
| Scientech Research LLC | 9,742 | $750.7K | 0.26% | +9,742 | New |
| Public Employees Retirement System of Ohio | 10,438 | $804.4K | 0.00% | +65+0.6% | Added |
| Yousif Capital Management, LLC | 11,217 | $864.4K | 0.01% | −651−5.5% | Reduced |
| Lighthouse Investment Partners, LLC | 11,661 | $898.6K | 0.03% | +11,661 | New |
| Exchange Traded Concepts, LLC | 12,241 | $943.3K | 0.01% | +12,241 | New |
| LPL Financial LLC | 12,369 | $953.1K | 0.00% | −8,904−41.9% | Reduced |
| Jain Global LLC | 12,417 | $956.9K | 0.01% | +12,417 | New |
| Farringdon Capital, Ltd. | 12,529 | $965.5K | 0.25% | +12,529 | New |
| Jane Street Group, LLC | 12,982 | $1.00M | 0.00% | −21,375−62.2% | Reduced |
| Summit Trail Advisors, LLC | 13,170 | $1.01M | 0.01% | +8,662+192.1% | Added |
| Creative Planning | 13,329 | $1.03M | 0.00% | +2,164+19.4% | Added |
| SEI Investments Co | 14,767 | $1.14M | 0.00% | −7,979−35.1% | Reduced |
| Treasurer of the State of North Carolina | 15,022 | $1.16M | 0.00% | −586−3.8% | Reduced |
| Great West Life Assurance Co | 15,207 | $1.17M | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 15,302 | $1.18M | 0.01% | +64+0.4% | Added |
| Mutual of America Capital Management LLC | 15,400 | $1.19M | 0.01% | −1,181−7.1% | Reduced |
| Twin Tree Management, LP | 16,037 | $1.24M | 0.06% | −13,323−45.4% | Reduced |
| Polymer Capital Management (US) LLC | 16,200 | $1.25M | 0.17% | +2,140+15.2% | Added |
| Stifel Financial Corp | 16,763 | $1.29M | 0.00% | +4,406+35.7% | Added |
| MetLife Investment Management | 17,138 | $1.32M | 0.01% | −816−4.5% | Reduced |
| APG Asset Management N.V. | 21,100 | $1.38M | 0.00% | 00.0% | Unchanged |
| Recurrent Investment Advisors LLC | 18,106 | $1.40M | 0.11% | +20.0% | Added |
| American Century Companies Inc | 18,111 | $1.40M | 0.00% | +55+0.3% | Added |
| Ameritas Investment Partners, Inc. | 18,640 | $1.44M | 0.04% | +7,066+61.1% | Added |
| Dana Investment Advisors, Inc. | 19,197 | $1.48M | 0.04% | −586−3.0% | Reduced |
| PDT Partners, LLC | 19,520 | $1.50M | 0.09% | +19,520 | New |
| Gotham Asset Management, LLC | 22,065 | $1.70M | 0.01% | +9,989+82.7% | Added |
| Knights of Columbus Asset Advisors LLC | 22,364 | $1.72M | 0.10% | 00.0% | Unchanged |
| South Dakota Investment Council | 22,435 | $1.73M | 0.03% | +300+1.4% | Added |
| State Board of Administration of Florida Retirement System | 24,115 | $1.86M | 0.00% | −535−2.2% | Reduced |
| Point72 Hong Kong Ltd | 24,871 | $1.92M | 0.09% | +24,871 | New |
| Mackenzie Financial Corp | 25,320 | $1.95M | 0.00% | +25,320 | New |