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, Q2 2026
Institutional positions in Westlake Corp as of Jun 30, 2026. 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
- 360
- +24 vs. Q1 2026
- Shares held
- 39.7M
- −4.10M (−9.4%) vs. Q1 2026
- Total value
- $2.90B
- −$2.21B (−43.2%) vs. Q1 2026
- New holders
- 88
- 109 more added
- Sold out
- 64
- 119 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Westlake Corp; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| IFP Advisors, Inc | 1,171 | $85.5K | 0.00% | +1,169+58,450.0% | Added |
| The PNC Financial Services Group, Inc. | 1,270 | $92.7K | 0.00% | −252−16.6% | Reduced |
| Kimelman & Baird, LLC | 1,500 | $109.5K | 0.01% | 00.0% | Unchanged |
| Public Employees Retirement Association of Colorado | 1,704 | $124.0K | 0.00% | 00.0% | Unchanged |
| Mitsubishi UFJ Trust & Banking Corp | 1,723 | $125.8K | 0.00% | +1,723 | New |
| Hantz Financial Services, Inc. | 1,945 | $142.0K | 0.00% | −232−10.7% | Reduced |
| Advisors Asset Management, Inc. | 1,949 | $142.3K | 0.00% | −3,698−65.5% | Reduced |
| US Bancorp | 1,979 | $144.5K | 0.00% | −191−8.8% | Reduced |
| Deutsche Bank AG | 2,169 | $158.3K | 0.00% | −201−8.5% | Reduced |
| CoreFirst Bank & Trust | 2,195 | $160.2K | 0.08% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 2,253 | $164.5K | 0.02% | +2,253 | New |
| Federation des caisses Desjardins du Quebec | 2,272 | $165.9K | 0.00% | +282+14.2% | Added |
| Lloyd Advisory Services, LLC. | 2,472 | $180.4K | 0.07% | +2,472 | New |
| Virtus Investment Advisers, Inc. | 2,505 | $182.9K | 0.04% | +769+44.3% | Added |
| Federated Hermes, Inc. | 2,574 | $187.9K | 0.00% | −264,077−99.0% | Reduced |
| Securian Asset Management, Inc | 2,503 | $194.3K | 0.01% | +100+4.2% | Added |
| Bayforest Capital Ltd | 2,728 | $199.1K | 0.18% | +2,728 | New |
| HB Wealth Management, LLC | 2,768 | $202.1K | 0.00% | +2,768 | New |
| Qsemble Capital Management, LP | 2,814 | $205.4K | 0.03% | +2,814 | New |
| First Eagle Investment Management, LLC | 2,835 | $207.0K | 0.00% | −4,283−60.2% | Reduced |
| Bull Harbor Capital LLC | 2,867 | $209.3K | 0.04% | +2,867 | New |
| Odyssean, LLC | 2,903 | $211.9K | 0.03% | 00.0% | Unchanged |
| Integrated Wealth Concepts LLC | 2,956 | $215.8K | 0.00% | +100+3.5% | Added |
| Claret Asset Management Corp | 3,026 | $221.0K | 0.02% | +19+0.6% | Added |
| Allworth Financial LP | 3,054 | $222.9K | 0.00% | +1,353+79.5% | Added |
| Landscape Capital Management, L.L.C. | 3,072 | $224.3K | 0.01% | +3,072 | New |
| Capital International Inc | 3,221 | $235.1K | 0.00% | −18,138−84.9% | Reduced |
| State of Alaska, Department of Revenue | 3,264 | $238.0K | 0.00% | −90−2.7% | Reduced |
| NorthCrest Asset Manangement, LLC | 3,214 | $239.4K | 0.01% | +3,214 | New |
| Cetera Investment Advisers | 3,437 | $250.9K | 0.00% | −484−12.3% | Reduced |
| Gamco Investors, Inc. Et Al | 3,491 | $254.8K | 0.00% | 00.0% | Unchanged |
| Aigen Investment Management, LP | 3,496 | $255.2K | 0.07% | +3,496 | New |
| Core Capital Management & Research, inc. | 3,339 | $263.5K | 0.14% | +3,339 | New |
| Evergreen Capital Management LLC | 3,651 | $266.5K | 0.00% | 00.0% | Unchanged |
| Pacer Advisors, Inc. | 3,756 | $274.0K | 0.00% | −88−2.3% | Reduced |
| SRS Capital Advisors, Inc. | 3,773 | $275.4K | 0.00% | +3,541+1,526.3% | Added |
| RMB Capital Management, LLC | 3,841 | $280.4K | 0.00% | +3,841 | New |
| Merit Financial Group, LLC | 3,859 | $281.7K | 0.00% | +3,859 | New |
| Rothschild Investment LLC | 3,892 | $284.1K | 0.01% | +3,845+8,180.9% | Added |
| Buckingham Strategic Partners | 3,912 | $285.6K | 0.00% | +3,912 | New |
| Xponance, Inc. | 3,928 | $286.7K | 0.00% | −60−1.5% | Reduced |
| CIBC Asset Management Inc | 3,977 | $290.3K | 0.00% | 00.0% | Unchanged |
| Hartree Partners, LP | 4,000 | $292.0K | 0.06% | −300−7.0% | Reduced |
| Arrowstreet Capital, Limited Partnership | 4,031 | $294.3K | 0.00% | +4,031 | New |
| 111 Capital | 4,081 | $297.9K | 0.05% | +4,081 | New |
| Jain Global LLC | 4,093 | $298.8K | 0.00% | +4,093 | New |
| Guggenheim Capital LLC | 4,374 | $319.3K | 0.00% | +255+6.2% | Added |
| Farringdon Capital, Ltd. | 4,583 | $334.6K | 0.17% | +4,583 | New |
| Tower Research Capital LLC (TRC) | 4,691 | $342.4K | 0.01% | +3,335+245.9% | Added |
| Capstone Investment Advisors, LLC | 4,721 | $344.6K | 0.00% | −131,087−96.5% | Reduced |
| Daiwa Securities Group Inc. | 4,785 | $349.3K | 0.00% | +4,785 | New |
| Scientech Research LLC | 4,813 | $351.3K | 0.28% | +4,813 | New |
| Aquatic Capital Management LLC | 4,884 | $356.5K | 0.01% | +4,884 | New |
| Sanctuary Advisors, LLC | 4,985 | $363.9K | 0.00% | +1,713+52.4% | Added |
| Centiva Capital, LP | 5,037 | $367.7K | 0.01% | +5,037 | New |
| Pathstone Holdings, LLC | 5,038 | $367.7K | 0.00% | +78+1.6% | Added |
| MAI Capital Management | 5,077 | $370.6K | 0.00% | +3,446+211.3% | Added |
| Y-Intercept (Hong Kong) Ltd | 5,128 | $374.3K | 0.01% | +5,128 | New |
| New York State Teachers Retirement System | 5,225 | $381.0K | 0.00% | +1,082+26.1% | Added |
| Capital International Ltd | 5,238 | $382.4K | 0.01% | −32,062−86.0% | Reduced |
| Unison Advisors LLC | 5,271 | $384.8K | 0.03% | +24+0.5% | Added |
| Victory Capital Management Inc | 5,297 | $386.7K | 0.00% | −40,281−88.4% | Reduced |
| Colony Group, LLC | 5,312 | $387.8K | 0.00% | +5,312 | New |
| Atria Investments LLC | 5,365 | $391.6K | 0.00% | +1,579+41.7% | Added |
| Fox Run Management, L.L.C. | 5,393 | $393.7K | 0.07% | +5,393 | New |
| Pictet Asset Management Holding SA | 5,483 | $400.3K | 0.00% | −576−9.5% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 5,591 | $408.1K | 0.00% | −93−1.6% | Reduced |
| Total Wealth Planning & Management, Inc. | 5,654 | $412.7K | 0.30% | −2,053−26.6% | Reduced |
| Brighton Jones LLC | 5,843 | $426.5K | 0.01% | +5,843 | New |
| XTX Topco Ltd | 6,003 | $438.2K | 0.01% | −6,875−53.4% | Reduced |
| Havemeyer Place LP | 6,007 | $438.5K | 0.04% | +2,757+84.8% | Added |
| Two Sigma Securities, LLC | 6,190 | $451.9K | 0.04% | +6,190 | New |
| Ieq Capital, LLC | 6,267 | $457.5K | 0.00% | +6,267 | New |
| Oxford Asset Management LLP | 6,291 | $459.2K | 0.23% | +6,291 | New |
| RiverFront Investment Group, LLC | 6,300 | $459.9K | 0.01% | −197−3.0% | Reduced |
| Gsa Capital Partners LLP | 6,310 | $461.0K | 0.03% | +1,204+23.6% | Added |
| Pettee Investors, Inc. | 6,711 | $489.9K | 0.24% | 00.0% | Unchanged |
| Pinnacle Financial Partners, Inc. | 6,813 | $497.3K | 0.00% | +6,813 | New |
| Dark Forest Capital Management LP | 6,817 | $497.6K | 0.03% | +6,817 | New |
| Oregon Public Employees Retirement Fund | 6,868 | $501.4K | 0.01% | 00.0% | Unchanged |
| Allstate Corp | 6,899 | $503.6K | 0.01% | +324+4.9% | Added |
| Dynamic Technology Lab Private Ltd | 6,975 | $509.0K | 0.11% | −377−5.1% | Reduced |
| New Mexico Educational Retirement Board | 7,000 | $511.0K | 0.01% | 00.0% | Unchanged |
| Chicago Partners Investment Group LLC | 6,931 | $521.4K | 0.01% | +6,931 | New |
| Thrivent Financial for Lutherans | 7,397 | $540.0K | 0.00% | −117−1.6% | Reduced |
| Marnell Management LLC | 7,402 | $540.3K | 0.27% | +3,600+94.7% | Added |
| Northwestern Mutual Investment Management Company, LLC | 7,493 | $547.0K | 0.01% | +21+0.3% | Added |
| State of Michigan Retirement System | 7,800 | $569.4K | 0.00% | −200−2.5% | Reduced |
| Handelsbanken Fonder AB | 8,000 | $584.0K | 0.00% | −900−10.1% | Reduced |
| Twin Focus Capital Partners, LLC | 8,000 | $584.0K | 0.06% | 00.0% | Unchanged |
| Numerai GP LLC | 8,035 | $586.6K | 0.05% | +8,035 | New |
| Captrust Financial Advisors | 8,087 | $590.4K | 0.00% | +8,087 | New |
| Vanguard Investments Australia, Ltd. | 8,118 | $592.6K | 0.00% | −1,814−18.3% | Reduced |
| CI Private Wealth, LLC | 8,143 | $594.4K | 0.00% | −26,828−76.7% | Reduced |
| KLP Kapitalforvaltning AS | 8,500 | $620.5K | 0.00% | 00.0% | Unchanged |
| Virtu Financial LLC | 8,729 | $637.0K | 0.02% | −803−8.4% | Reduced |
| Arizona State Retirement System | 8,836 | $645.0K | 0.00% | −1,744−16.5% | Reduced |
| Bridgefront Capital, LLC | 9,068 | $662.0K | 0.17% | +9,068 | New |
| Macquarie Group Ltd | 9,193 | $671.1K | 0.00% | +9,193 | New |
| JustInvest LLC | 9,336 | $681.5K | 0.01% | −127−1.3% | Reduced |