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 |
|---|---|---|---|---|---|
| Freestone Grove Partners LP | 27,248 | $1.99M | 0.01% | +27,248 | New |
| Barclays PLC | 26,524 | $1.94M | 0.00% | +12,068+83.5% | Added |
| Mercer Global Advisors Inc | 26,477 | $1.93M | 0.00% | +20,760+363.1% | Added |
| Susquehanna International Group, LLP | 26,155 | $1.91M | 0.00% | +11,156+74.4% | Added |
| Stifel Financial Corp | 26,128 | $1.91M | 0.00% | +1,203+4.8% | Added |
| National Bank of Canada | 25,924 | $1.89M | 0.00% | +25,742+14,144.0% | Added |
| Treasurer of the State of North Carolina | 25,716 | $1.88M | 0.00% | +11,412+79.8% | Added |
| Man Group plc | 25,705 | $1.88M | 0.00% | −134,581−84.0% | Reduced |
| Creative Planning | 25,595 | $1.87M | 0.00% | +13,634+114.0% | Added |
| American Century Companies Inc | 24,162 | $1.76M | 0.00% | +4,142+20.7% | Added |
| State Board of Administration of Florida Retirement System | 23,505 | $1.72M | 0.00% | −610−2.5% | Reduced |
| HSBC Holdings PLC | 23,272 | $1.70M | 0.00% | +23,272 | New |
| Vident Advisory, LLC | 23,139 | $1.69M | 0.01% | +23,139 | New |
| Jane Street Group, LLC | 21,762 | $1.59M | 0.00% | −83,924−79.4% | Reduced |
| Summit Trail Advisors, LLC | 21,266 | $1.55M | 0.02% | +8,742+69.8% | Added |
| Entropy Technologies, LP | 20,610 | $1.50M | 0.06% | +20,610 | New |
| Great West Life Assurance Co | 20,614 | $1.50M | 0.00% | +609+3.0% | Added |
| South Dakota Investment Council | 19,335 | $1.41M | 0.02% | −900−4.4% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 19,174 | $1.40M | 0.00% | 00.0% | Unchanged |
| Wealth Enhancement Advisory Services, LLC | 21,697 | $1.40M | 0.00% | +19,109+738.4% | Added |
| Dana Investment Advisors, Inc. | 18,847 | $1.38M | 0.04% | −118−0.6% | Reduced |
| Brevan Howard Capital Management LP | 18,251 | $1.33M | 0.02% | +18,251 | New |
| Verition Fund Management LLC | 17,000 | $1.24M | 0.01% | +15,000+750.0% | Added |
| Magnetar Financial LLC | 16,922 | $1.24M | 0.01% | +16,922 | New |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 16,907 | $1.23M | 0.00% | +5,645+50.1% | Added |
| Credit Agricole S A | 16,285 | $1.19M | 0.00% | +16,285 | New |
| MetLife Investment Management | 16,031 | $1.17M | 0.01% | −375−2.3% | Reduced |
| Bleakley Financial Group, LLC | 15,907 | $1.16M | 0.01% | +15,907 | New |
| Storebrand Asset Management AS | 15,405 | $1.12M | 0.00% | 00.0% | Unchanged |
| Quantbot Technologies LP | 15,303 | $1.12M | 0.04% | −8,633−36.1% | Reduced |
| Gotham Asset Management, LLC | 15,253 | $1.11M | 0.00% | −19,311−55.9% | Reduced |
| Ameritas Investment Partners, Inc. | 14,892 | $1.09M | 0.03% | −5,587−27.3% | Reduced |
| LPL Financial LLC | 14,787 | $1.08M | 0.00% | +1,728+13.2% | Added |
| Amalgamated Bank | 14,729 | $1.07M | 0.01% | −277−1.8% | Reduced |
| Canada Pension Plan Investment Board | 14,210 | $1.04M | 0.00% | +12,000+543.0% | Added |
| Polymer Capital Management (US) LLC | 14,143 | $1.03M | 0.15% | +1,623+13.0% | Added |
| Storgate, LLC | 13,795 | $1.01M | 0.21% | +8,285+150.4% | Added |
| Brown Advisory Inc | 13,766 | $1.00M | 0.00% | +11,540+518.4% | Added |
| Neo Ivy Capital Management | 13,509 | $986.2K | 0.23% | +13,509 | New |
| Twin Capital Management Inc | 13,135 | $958.9K | 0.10% | +13,135 | New |
| CWM Advisors, LLC | 12,996 | $948.7K | 0.04% | +3,420+35.7% | Added |
| Vanguard Global Advisers, LLC | 12,989 | $948.2K | 0.00% | −922−6.6% | Reduced |
| State of New Jersey Common Pension Fund D | 12,965 | $946.4K | 0.00% | −10,693−45.2% | Reduced |
| KBC Group NV | 12,878 | $940.0K | 0.00% | −6,554−33.7% | Reduced |
| State of Tennessee, Treasury Department | 12,717 | $928.3K | 0.00% | −229−1.8% | Reduced |
| Mutual of America Capital Management LLC | 12,363 | $902.5K | 0.01% | −417−3.3% | Reduced |
| AlphaGrep UK Ltd | 12,289 | $897.1K | 0.27% | +8,973+270.6% | Added |
| Schonfeld Strategic Advisors LLC | 12,231 | $892.9K | 0.00% | +2,049+20.1% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 11,638 | $849.6K | 0.00% | −841−6.7% | Reduced |
| SEI Investments Co | 10,896 | $795.5K | 0.00% | −1,873−14.7% | Reduced |
| Graham Capital Management, L.P. | 10,704 | $781.4K | 0.02% | +10,704 | New |
| Fifth Third Bancorp | 10,578 | $772.2K | 0.00% | −5,467−34.1% | Reduced |
| Mirabella Financial Services LLP | 10,550 | $770.1K | 0.07% | +10,550 | New |
| Capital International Sarl | 9,871 | $720.6K | 0.01% | −53,763−84.5% | Reduced |
| Yousif Capital Management, LLC | 9,800 | $715.4K | 0.01% | −718−6.8% | Reduced |
| Louisiana State Employees Retirement System | 9,700 | $708.1K | 0.01% | 00.0% | Unchanged |
| Fieldview Capital Management, LLC | 9,445 | $689.5K | 0.20% | +9,445 | New |
| SummitTX Capital, L.P. | 9,414 | $687.2K | 0.02% | −4,921−34.3% | Reduced |
| Public Employees Retirement System of Ohio | 9,392 | $685.6K | 0.00% | −332−3.4% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 9,370 | $684.0K | 0.00% | +9,370 | New |
| JustInvest LLC | 9,336 | $681.5K | 0.01% | −127−1.3% | Reduced |
| Macquarie Group Ltd | 9,193 | $671.1K | 0.00% | +9,193 | New |
| Bridgefront Capital, LLC | 9,068 | $662.0K | 0.17% | +9,068 | New |
| Arizona State Retirement System | 8,836 | $645.0K | 0.00% | −1,744−16.5% | Reduced |
| Virtu Financial LLC | 8,729 | $637.0K | 0.02% | −803−8.4% | Reduced |
| KLP Kapitalforvaltning AS | 8,500 | $620.5K | 0.00% | 00.0% | Unchanged |
| CI Private Wealth, LLC | 8,143 | $594.4K | 0.00% | −26,828−76.7% | Reduced |
| Vanguard Investments Australia, Ltd. | 8,118 | $592.6K | 0.00% | −1,814−18.3% | Reduced |
| Captrust Financial Advisors | 8,087 | $590.4K | 0.00% | +8,087 | New |
| Numerai GP LLC | 8,035 | $586.6K | 0.05% | +8,035 | New |
| 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 |
| State of Michigan Retirement System | 7,800 | $569.4K | 0.00% | −200−2.5% | Reduced |
| Northwestern Mutual Investment Management Company, LLC | 7,493 | $547.0K | 0.01% | +21+0.3% | Added |
| Marnell Management LLC | 7,402 | $540.3K | 0.27% | +3,600+94.7% | Added |
| Thrivent Financial for Lutherans | 7,397 | $540.0K | 0.00% | −117−1.6% | Reduced |
| Chicago Partners Investment Group LLC | 6,931 | $521.4K | 0.01% | +6,931 | New |
| New Mexico Educational Retirement Board | 7,000 | $511.0K | 0.01% | 00.0% | Unchanged |
| Dynamic Technology Lab Private Ltd | 6,975 | $509.0K | 0.11% | −377−5.1% | Reduced |
| Allstate Corp | 6,899 | $503.6K | 0.01% | +324+4.9% | Added |
| Oregon Public Employees Retirement Fund | 6,868 | $501.4K | 0.01% | 00.0% | Unchanged |
| Dark Forest Capital Management LP | 6,817 | $497.6K | 0.03% | +6,817 | New |
| Pinnacle Financial Partners, Inc. | 6,813 | $497.3K | 0.00% | +6,813 | New |
| Pettee Investors, Inc. | 6,711 | $489.9K | 0.24% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 6,310 | $461.0K | 0.03% | +1,204+23.6% | Added |
| RiverFront Investment Group, LLC | 6,300 | $459.9K | 0.01% | −197−3.0% | Reduced |
| Oxford Asset Management LLP | 6,291 | $459.2K | 0.23% | +6,291 | New |
| Ieq Capital, LLC | 6,267 | $457.5K | 0.00% | +6,267 | New |
| Two Sigma Securities, LLC | 6,190 | $451.9K | 0.04% | +6,190 | New |
| Havemeyer Place LP | 6,007 | $438.5K | 0.04% | +2,757+84.8% | Added |
| XTX Topco Ltd | 6,003 | $438.2K | 0.01% | −6,875−53.4% | Reduced |
| Brighton Jones LLC | 5,843 | $426.5K | 0.01% | +5,843 | New |
| Total Wealth Planning & Management, Inc. | 5,654 | $412.7K | 0.30% | −2,053−26.6% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 5,591 | $408.1K | 0.00% | −93−1.6% | Reduced |
| Pictet Asset Management Holding SA | 5,483 | $400.3K | 0.00% | −576−9.5% | Reduced |
| Fox Run Management, L.L.C. | 5,393 | $393.7K | 0.07% | +5,393 | New |
| Atria Investments LLC | 5,365 | $391.6K | 0.00% | +1,579+41.7% | Added |
| Colony Group, LLC | 5,312 | $387.8K | 0.00% | +5,312 | New |
| Victory Capital Management Inc | 5,297 | $386.7K | 0.00% | −40,281−88.4% | Reduced |
| Unison Advisors LLC | 5,271 | $384.8K | 0.03% | +24+0.5% | Added |