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 |
|---|---|---|---|---|---|
| ASR Vermogensbeheer N.V. | 2,449 | $188.7K | 0.00% | −28−1.1% | Reduced |
| US Bancorp | 2,433 | $187.5K | 0.00% | −192−7.3% | Reduced |
| Securian Asset Management, Inc | 2,403 | $185.2K | 0.00% | −100−4.0% | Reduced |
| CoreFirst Bank & Trust | 2,250 | $173.4K | 0.09% | +830+58.5% | Added |
| Federation des caisses Desjardins du Quebec | 2,187 | $168.5K | 0.00% | +1,997+1,051.1% | Added |
| California State Teachers Retirement System | 2,089 | $161.0K | 0.00% | +2+0.1% | Added |
| Sterling Capital Management LLC | 2,066 | $159.2K | 0.00% | −210−9.2% | Reduced |
| Covestor Ltd | 1,779 | $137.0K | 0.08% | +1,020+134.4% | Added |
| Public Employees Retirement Association of Colorado | 1,704 | $131.0K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 1,544 | $119.0K | 0.00% | +111+7.7% | Added |
| Tower Research Capital LLC (TRC) | 1,532 | $118.1K | 0.00% | −960−38.5% | Reduced |
| Kimelman & Baird, LLC | 1,500 | $115.6K | 0.01% | 00.0% | Unchanged |
| Allworth Financial LP | 1,442 | $111.1K | 0.00% | +33+2.3% | Added |
| MAI Capital Management | 1,310 | $100.9K | 0.00% | −38−2.8% | Reduced |
| Grey Fox Wealth Advisors, LLC | 1,154 | $88.9K | 0.02% | +1,154 | New |
| Nomura Asset Management Co Ltd | 896 | $69.0K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 799 | $61.6K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 778 | $60.0K | 0.00% | +286+58.1% | Added |
| GWM Advisors LLC | 745 | $57.4K | 0.00% | 00.0% | Unchanged |
| Hantz Financial Services, Inc. | 740 | $57.0K | 0.00% | +476+180.3% | Added |
| CWM, LLC | 683 | $53.0K | 0.00% | +116+20.5% | Added |
| CIBC Private Wealth Group, LLC | 686 | $52.9K | 0.00% | +686 | New |
| Quest Partners LLC | 644 | $49.6K | 0.00% | −86−11.8% | Reduced |
| Transamerica Financial Advisors, Inc. | 586 | $45.1K | 0.00% | +148+33.8% | Added |
| Umb Bank N A | 578 | $44.5K | 0.00% | +13+2.3% | Added |
| Farther Finance Advisors, LLC | 503 | $38.8K | 0.00% | −1,418−73.8% | Reduced |
| Itau Unibanco Holding S.A. | 497 | $38.3K | 0.00% | −503−50.3% | Reduced |
| Signaturefd, LLC | 454 | $35.0K | 0.00% | −186−29.1% | Reduced |
| GAMMA Investing LLC | 441 | $34.0K | 0.00% | −4−0.9% | Reduced |
| Jones Financial Companies LLLP | 406 | $31.5K | 0.00% | +106+35.3% | Added |
| Point72 Europe (London) LLP | 373 | $28.7K | 0.00% | +373 | New |
| Caitong International Asset Management Co., Ltd | 366 | $28.2K | 0.02% | +366 | New |
| Arcadia Investment Management Corp | 350 | $27.0K | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 350 | $27.0K | 0.00% | +3+0.9% | Added |
| Nisa Investment Advisors, LLC | 332 | $25.6K | 0.00% | +34+11.4% | Added |
| Fifth Third Bancorp | 328 | $25.3K | 0.00% | +39+13.5% | Added |
| Rockefeller Capital Management L.P. | 299 | $23.1K | 0.00% | +299 | New |
| Pathway Financial Advisers, LLC | 289 | $22.3K | 0.01% | +289 | New |
| IFP Advisors, Inc | 287 | $22.1K | 0.00% | +28+10.8% | Added |
| National Bank of Canada | 287 | $22.1K | 0.00% | +50+21.1% | Added |
| FNY Investment Advisers, LLC | 273 | $21.0K | 0.01% | +273 | New |
| Spire Wealth Management | 272 | $21.0K | 0.00% | +127+87.6% | Added |
| Massmutual Trust Co FSB | 231 | $17.8K | 0.00% | +101+77.7% | Added |
| NBC Securities, Inc. | 204 | $15.7K | 0.00% | +9+4.6% | Added |
| Quent Capital, LLC | 203 | $15.7K | 0.00% | +203 | New |
| EverSource Wealth Advisors, LLC | 197 | $15.2K | 0.00% | −121−38.1% | Reduced |
| Private Wealth Management Group, LLC | 163 | $12.6K | 0.00% | +21+14.8% | Added |
| Cullen/Frost Bankers, Inc. | 133 | $10.2K | 0.00% | +133 | New |
| Transce3nd, LLC | 71 | $9.47K | 0.08% | −2,427−97.2% | Reduced |
| Versant Capital Management, Inc | 122 | $9.40K | 0.00% | +100+454.5% | Added |
| CVA Family Office, LLC | 120 | $9.25K | 0.00% | +37+44.6% | Added |
| Smartleaf Asset Management LLC | 120 | $9.24K | 0.00% | +48+66.7% | Added |
| Bessemer Group Inc | 97 | $8.00K | 0.00% | +54+125.6% | Added |
| Assetmark, Inc | 94 | $7.24K | 0.00% | +19+25.3% | Added |
| Private Trust Co NA | 90 | $6.93K | 0.00% | 00.0% | Unchanged |
| Manchester Capital Management LLC | 84 | $6.47K | 0.00% | +61+265.2% | Added |
| Rise Advisors, LLC | 83 | $6.42K | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 83 | $6.40K | 0.00% | −13−13.5% | Reduced |
| Ameritas Advisory Services, LLC | 78 | $6.01K | 0.00% | 00.0% | Unchanged |
| Deseret Mutual Benefit Administrators | 62 | $4.78K | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 61 | $4.71K | 0.00% | +22+56.4% | Added |
| Trust Co of Vermont | 50 | $3.85K | 0.00% | 00.0% | Unchanged |
| TD Waterhouse Canada Inc. | 50 | $3.84K | 0.00% | +10+25.0% | Added |
| First Horizon Corp | 48 | $3.70K | 0.00% | +48 | New |
| Parkside Financial Bank & Trust | 47 | $3.62K | 0.00% | −27−36.5% | Reduced |
| Pinnacle Bancorp, Inc. | 43 | $3.31K | 0.00% | +43 | New |
| MV Capital Management, Inc. | 41 | $3.16K | 0.00% | +3+7.9% | Added |
| Principal Securities, Inc. | 40 | $3.08K | 0.00% | +17+73.9% | Added |
| Bruce G. Allen Investments, LLC | 39 | $3.00K | 0.00% | −4−9.3% | Reduced |
| Wealthspire Advisors, LLC | 37 | $2.85K | 0.00% | +37 | New |
| Root Financial Partners, LLC | 37 | $2.85K | 0.00% | +37 | New |
| Farmers & Merchants Investments Inc | 30 | $2.31K | 0.00% | +3+11.1% | Added |
| Sachetta, LLC | 26 | $2.00K | 0.00% | +7+36.8% | Added |
| Hemington Wealth Management | 29 | $2.00K | 0.00% | +2+7.4% | Added |
| Clearstead Advisors, LLC | 25 | $1.93K | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 23 | $1.77K | 0.00% | −1−4.2% | Reduced |
| Peterson Wealth Services | 1,835 | $1.77K | 0.00% | +1,812+7,878.3% | Added |
| Bell Investment Advisors, Inc | 18 | $1.39K | 0.00% | +6+50.0% | Added |
| Global Retirement Partners, LLC | 17 | $1.31K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 17 | $1.31K | 0.00% | +2+13.3% | Added |
| Ronald Blue Trust, Inc. | 15 | $1.16K | 0.00% | −34−69.4% | Reduced |
| Advisory Services Network, LLC | 15 | $1.16K | 0.00% | +15 | New |
| Fortitude Family Office, LLC | 14 | $1.08K | 0.00% | −6−30.0% | Reduced |
| Ogorek Anthony Joseph | 18 | $1.00K | 0.00% | 00.0% | Unchanged |
| Picton Mahoney Asset Management | 8 | $1.00K | 0.00% | 00.0% | Unchanged |
| Avion Wealth | 17 | $1.00K | 0.00% | 00.0% | Unchanged |
| South State Corp. | 11 | $848 | 0.00% | −1−8.3% | Reduced |
| Jackson, Grant Investment Advisers, Inc. | 11 | $848 | 0.00% | 00.0% | Unchanged |
| Raffa Wealth Management, LLC | 9 | $694 | 0.00% | 00.0% | Unchanged |
| Principia Wealth Advisory, LLC | 8 | $616 | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 7 | $539 | 0.00% | +7 | New |
| CoreCap Advisors, LLC | 5 | $385 | 0.00% | 00.0% | Unchanged |
| SWAN Capital LLC | 5 | $385 | 0.00% | 00.0% | Unchanged |
| DiNuzzo Private Wealth, Inc. | 4 | $352 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 4 | $309 | 0.00% | −2−33.3% | Reduced |
| Core Alternative Capital | 4 | $308 | 0.00% | −3−42.9% | Reduced |
| Cromwell Holdings LLC | 2 | $155 | 0.00% | +2 | New |
| New Millennium Group LLC | 2 | $154 | 0.00% | +2 | New |
| Valued Wealth Advisors LLC | 1 | $79 | 0.00% | 00.0% | Unchanged |
| Rakuten Securities, Inc. | 1 | $77 | 0.00% | −10−90.9% | Reduced |