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 |
|---|---|---|---|---|---|
| Healthcare of Ontario Pension Plan Trust Fund | 9,370 | $684.0K | 0.00% | +9,370 | New |
| Public Employees Retirement System of Ohio | 9,392 | $685.6K | 0.00% | −332−3.4% | Reduced |
| SummitTX Capital, L.P. | 9,414 | $687.2K | 0.02% | −4,921−34.3% | Reduced |
| Fieldview Capital Management, LLC | 9,445 | $689.5K | 0.20% | +9,445 | New |
| Louisiana State Employees Retirement System | 9,700 | $708.1K | 0.01% | 00.0% | Unchanged |
| Yousif Capital Management, LLC | 9,800 | $715.4K | 0.01% | −718−6.8% | Reduced |
| Capital International Sarl | 9,871 | $720.6K | 0.01% | −53,763−84.5% | Reduced |
| Mirabella Financial Services LLP | 10,550 | $770.1K | 0.07% | +10,550 | New |
| Fifth Third Bancorp | 10,578 | $772.2K | 0.00% | −5,467−34.1% | Reduced |
| Graham Capital Management, L.P. | 10,704 | $781.4K | 0.02% | +10,704 | New |
| SEI Investments Co | 10,896 | $795.5K | 0.00% | −1,873−14.7% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 11,638 | $849.6K | 0.00% | −841−6.7% | Reduced |
| Schonfeld Strategic Advisors LLC | 12,231 | $892.9K | 0.00% | +2,049+20.1% | Added |
| AlphaGrep UK Ltd | 12,289 | $897.1K | 0.27% | +8,973+270.6% | Added |
| Mutual of America Capital Management LLC | 12,363 | $902.5K | 0.01% | −417−3.3% | Reduced |
| State of Tennessee, Treasury Department | 12,717 | $928.3K | 0.00% | −229−1.8% | Reduced |
| KBC Group NV | 12,878 | $940.0K | 0.00% | −6,554−33.7% | Reduced |
| State of New Jersey Common Pension Fund D | 12,965 | $946.4K | 0.00% | −10,693−45.2% | Reduced |
| Vanguard Global Advisers, LLC | 12,989 | $948.2K | 0.00% | −922−6.6% | Reduced |
| CWM Advisors, LLC | 12,996 | $948.7K | 0.04% | +3,420+35.7% | Added |
| Twin Capital Management Inc | 13,135 | $958.9K | 0.10% | +13,135 | New |
| Neo Ivy Capital Management | 13,509 | $986.2K | 0.23% | +13,509 | New |
| Brown Advisory Inc | 13,766 | $1.00M | 0.00% | +11,540+518.4% | Added |
| Storgate, LLC | 13,795 | $1.01M | 0.21% | +8,285+150.4% | Added |
| Polymer Capital Management (US) LLC | 14,143 | $1.03M | 0.15% | +1,623+13.0% | Added |
| Canada Pension Plan Investment Board | 14,210 | $1.04M | 0.00% | +12,000+543.0% | Added |
| Amalgamated Bank | 14,729 | $1.07M | 0.01% | −277−1.8% | Reduced |
| LPL Financial LLC | 14,787 | $1.08M | 0.00% | +1,728+13.2% | Added |
| Ameritas Investment Partners, Inc. | 14,892 | $1.09M | 0.03% | −5,587−27.3% | Reduced |
| Gotham Asset Management, LLC | 15,253 | $1.11M | 0.00% | −19,311−55.9% | Reduced |
| Quantbot Technologies LP | 15,303 | $1.12M | 0.04% | −8,633−36.1% | Reduced |
| Storebrand Asset Management AS | 15,405 | $1.12M | 0.00% | 00.0% | Unchanged |
| Bleakley Financial Group, LLC | 15,907 | $1.16M | 0.01% | +15,907 | New |
| MetLife Investment Management | 16,031 | $1.17M | 0.01% | −375−2.3% | Reduced |
| Credit Agricole S A | 16,285 | $1.19M | 0.00% | +16,285 | New |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 16,907 | $1.23M | 0.00% | +5,645+50.1% | Added |
| Magnetar Financial LLC | 16,922 | $1.24M | 0.01% | +16,922 | New |
| Verition Fund Management LLC | 17,000 | $1.24M | 0.01% | +15,000+750.0% | Added |
| Brevan Howard Capital Management LP | 18,251 | $1.33M | 0.02% | +18,251 | New |
| Dana Investment Advisors, Inc. | 18,847 | $1.38M | 0.04% | −118−0.6% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 21,697 | $1.40M | 0.00% | +19,109+738.4% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 19,174 | $1.40M | 0.00% | 00.0% | Unchanged |
| South Dakota Investment Council | 19,335 | $1.41M | 0.02% | −900−4.4% | Reduced |
| Great West Life Assurance Co | 20,614 | $1.50M | 0.00% | +609+3.0% | Added |
| Entropy Technologies, LP | 20,610 | $1.50M | 0.06% | +20,610 | New |
| Summit Trail Advisors, LLC | 21,266 | $1.55M | 0.02% | +8,742+69.8% | Added |
| Jane Street Group, LLC | 21,762 | $1.59M | 0.00% | −83,924−79.4% | Reduced |
| Vident Advisory, LLC | 23,139 | $1.69M | 0.01% | +23,139 | New |
| HSBC Holdings PLC | 23,272 | $1.70M | 0.00% | +23,272 | New |
| State Board of Administration of Florida Retirement System | 23,505 | $1.72M | 0.00% | −610−2.5% | Reduced |
| American Century Companies Inc | 24,162 | $1.76M | 0.00% | +4,142+20.7% | Added |
| Creative Planning | 25,595 | $1.87M | 0.00% | +13,634+114.0% | Added |
| Man Group plc | 25,705 | $1.88M | 0.00% | −134,581−84.0% | Reduced |
| Treasurer of the State of North Carolina | 25,716 | $1.88M | 0.00% | +11,412+79.8% | Added |
| National Bank of Canada | 25,924 | $1.89M | 0.00% | +25,742+14,144.0% | Added |
| Stifel Financial Corp | 26,128 | $1.91M | 0.00% | +1,203+4.8% | Added |
| Susquehanna International Group, LLP | 26,155 | $1.91M | 0.00% | +11,156+74.4% | Added |
| Mercer Global Advisors Inc | 26,477 | $1.93M | 0.00% | +20,760+363.1% | Added |
| Barclays PLC | 26,524 | $1.94M | 0.00% | +12,068+83.5% | Added |
| Freestone Grove Partners LP | 27,248 | $1.99M | 0.01% | +27,248 | New |
| First Trust Advisors LP | 27,496 | $2.01M | 0.00% | −74,803−73.1% | Reduced |
| Envestnet Asset Management Inc | 29,586 | $2.16M | 0.00% | +1,540+5.5% | Added |
| Vanguard Asset Management, Ltd | 30,040 | $2.19M | 0.00% | −3,318−9.9% | Reduced |
| Worldquant Millennium Advisors LLC | 31,204 | $2.28M | 0.01% | +12,830+69.8% | Added |
| Ameriprise Financial Inc | 31,288 | $2.28M | 0.00% | +2,801+9.8% | Added |
| Abn Amro Investment Solutions | 31,597 | $2.31M | 0.02% | +31,597 | New |
| Los Angeles Capital Management LLC | 32,600 | $2.38M | 0.01% | +32,443+20,664.3% | Added |
| Acadian Asset Management LLC | 34,498 | $2.52M | 0.00% | +34,498 | New |
| Retirement Systems of Alabama | 34,454 | $2.52M | 0.01% | −6,432−15.7% | Reduced |
| HITE Hedge Asset Management LLC | 34,589 | $2.52M | 0.14% | +34,589 | New |
| Bank of Montreal | 35,590 | $2.60M | 0.00% | −3,448−8.8% | Reduced |
| Occudo Quantitative Strategies LP | 35,695 | $2.61M | 0.14% | −8,735−19.7% | Reduced |
| State of Wisconsin Investment Board | 35,823 | $2.62M | 0.01% | +10,571+41.9% | Added |
| Citigroup Inc | 36,569 | $2.67M | 0.00% | −17,990−33.0% | Reduced |
| California State Teachers Retirement System | 36,900 | $2.69M | 0.00% | −7,559−17.0% | Reduced |
| Manufacturers Life Insurance Company, The | 37,155 | $2.71M | 0.00% | +3,860+11.6% | Added |
| New York State Common Retirement Fund | 40,926 | $2.99M | 0.00% | −268,700−86.8% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 41,791 | $3.05M | 0.02% | −252−0.6% | Reduced |
| Two Sigma Investments, LP | 45,357 | $3.31M | 0.00% | +45,357 | New |
| Mariner, LLC | 47,319 | $3.45M | 0.00% | +47,319 | New |
| Legal & General Group Plc | 50,025 | $3.65M | 0.00% | −712−1.4% | Reduced |
| Axq Capital, LP | 51,437 | $3.75M | 0.41% | +51,437 | New |
| Merewether Investment Management, LP | 53,439 | $3.90M | 0.07% | −166,461−75.7% | Reduced |
| Assenagon Asset Management S.A. | 55,289 | $4.04M | 0.01% | +55,289 | New |
| Turas Capital Management LP | 58,800 | $4.29M | 1.97% | +58,800 | New |
| SG Americas Securities, LLC | 59,116 | $4.32M | 0.00% | +34,540+140.5% | Added |
| Swiss National Bank | 64,200 | $4.69M | 0.00% | −11,700−15.4% | Reduced |
| Engineers Gate Manager LP | 71,301 | $5.20M | 0.07% | +28,802+67.8% | Added |
| Agman Capital LLC | 71,465 | $5.22M | 3.48% | −818−1.1% | Reduced |
| Principal Financial Group Inc | 75,653 | $5.52M | 0.00% | +1,172+1.6% | Added |
| PDT Partners, LLC | 75,777 | $5.53M | 0.29% | 00.0% | Unchanged |
| Toroso Investments, LLC | 76,055 | $5.55M | 0.01% | +28,235+59.0% | Added |
| Natixis | 77,117 | $5.63M | 0.03% | +77,117 | New |
| Squarepoint Ops LLC | 79,967 | $5.84M | 0.01% | +41,435+107.5% | Added |
| Meiji Yasuda Asset Management Co Ltd. | 82,778 | $6.04M | 0.27% | +3,300+4.2% | Added |
| Walleye Capital LLC | 82,847 | $6.05M | 0.03% | +23,033+38.5% | Added |
| Rhumbline Advisers | 86,305 | $6.30M | 0.00% | −999−1.1% | Reduced |
| Alberta Investment Management Corp | 89,200 | $6.51M | 0.04% | +89,200 | New |
| Point72 Asset Management, L.P. | 89,731 | $6.55M | 0.01% | +89,731 | New |
| BNP Paribas Arbitrage, SA | 94,400 | $6.89M | 0.00% | +87,710+1,311.1% | Added |