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 |
|---|---|---|---|---|---|
| Penserra Capital Management LLC | 9 | $0 | 0.00% | −3−25.0% | Reduced |
| Cloud Capital Management, LLC | 2 | $0 | 0.00% | +2 | New |
| Rakuten Securities, Inc. | 1 | $77 | 0.00% | −10−90.9% | Reduced |
| SBI Securities Co., Ltd. | 1 | $77 | 0.00% | 00.0% | Unchanged |
| HFM Investment Advisors, LLC | 1 | $77 | 0.00% | 00.0% | Unchanged |
| Bay Harbor Wealth Management, LLC | 1 | $77 | 0.00% | +1 | New |
| Valued Wealth Advisors LLC | 1 | $79 | 0.00% | 00.0% | Unchanged |
| New Millennium Group LLC | 2 | $154 | 0.00% | +2 | New |
| Cromwell Holdings LLC | 2 | $155 | 0.00% | +2 | New |
| Core Alternative Capital | 4 | $308 | 0.00% | −3−42.9% | Reduced |
| True Wealth Design, LLC | 4 | $309 | 0.00% | −2−33.3% | Reduced |
| DiNuzzo Private Wealth, Inc. | 4 | $352 | 0.00% | 00.0% | Unchanged |
| CoreCap Advisors, LLC | 5 | $385 | 0.00% | 00.0% | Unchanged |
| SWAN Capital LLC | 5 | $385 | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 7 | $539 | 0.00% | +7 | New |
| Principia Wealth Advisory, LLC | 8 | $616 | 0.00% | 00.0% | Unchanged |
| Raffa Wealth Management, LLC | 9 | $694 | 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 |
| 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 |
| Fortitude Family Office, LLC | 14 | $1.08K | 0.00% | −6−30.0% | Reduced |
| Advisory Services Network, LLC | 15 | $1.16K | 0.00% | +15 | New |
| Ronald Blue Trust, Inc. | 15 | $1.16K | 0.00% | −34−69.4% | Reduced |
| Global Retirement Partners, LLC | 17 | $1.31K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 17 | $1.31K | 0.00% | +2+13.3% | Added |
| Bell Investment Advisors, Inc | 18 | $1.39K | 0.00% | +6+50.0% | Added |
| 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 |
| Clearstead Advisors, LLC | 25 | $1.93K | 0.00% | 00.0% | Unchanged |
| Hemington Wealth Management | 29 | $2.00K | 0.00% | +2+7.4% | Added |
| Sachetta, LLC | 26 | $2.00K | 0.00% | +7+36.8% | Added |
| Farmers & Merchants Investments Inc | 30 | $2.31K | 0.00% | +3+11.1% | Added |
| Wealthspire Advisors, LLC | 37 | $2.85K | 0.00% | +37 | New |
| Root Financial Partners, LLC | 37 | $2.85K | 0.00% | +37 | New |
| Bruce G. Allen Investments, LLC | 39 | $3.00K | 0.00% | −4−9.3% | Reduced |
| Principal Securities, Inc. | 40 | $3.08K | 0.00% | +17+73.9% | Added |
| MV Capital Management, Inc. | 41 | $3.16K | 0.00% | +3+7.9% | Added |
| Pinnacle Bancorp, Inc. | 43 | $3.31K | 0.00% | +43 | New |
| Parkside Financial Bank & Trust | 47 | $3.62K | 0.00% | −27−36.5% | Reduced |
| First Horizon Corp | 48 | $3.70K | 0.00% | +48 | New |
| TD Waterhouse Canada Inc. | 50 | $3.84K | 0.00% | +10+25.0% | Added |
| Trust Co of Vermont | 50 | $3.85K | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 61 | $4.71K | 0.00% | +22+56.4% | Added |
| Deseret Mutual Benefit Administrators | 62 | $4.78K | 0.00% | 00.0% | Unchanged |
| Ameritas Advisory Services, LLC | 78 | $6.01K | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 83 | $6.40K | 0.00% | −13−13.5% | Reduced |
| Rise Advisors, LLC | 83 | $6.42K | 0.00% | 00.0% | Unchanged |
| Manchester Capital Management LLC | 84 | $6.47K | 0.00% | +61+265.2% | Added |
| Private Trust Co NA | 90 | $6.93K | 0.00% | 00.0% | Unchanged |
| Assetmark, Inc | 94 | $7.24K | 0.00% | +19+25.3% | Added |
| Bessemer Group Inc | 97 | $8.00K | 0.00% | +54+125.6% | Added |
| Smartleaf Asset Management LLC | 120 | $9.24K | 0.00% | +48+66.7% | Added |
| CVA Family Office, LLC | 120 | $9.25K | 0.00% | +37+44.6% | Added |
| Versant Capital Management, Inc | 122 | $9.40K | 0.00% | +100+454.5% | Added |
| Transce3nd, LLC | 71 | $9.47K | 0.08% | −2,427−97.2% | Reduced |
| Cullen/Frost Bankers, Inc. | 133 | $10.2K | 0.00% | +133 | New |
| Private Wealth Management Group, LLC | 163 | $12.6K | 0.00% | +21+14.8% | Added |
| EverSource Wealth Advisors, LLC | 197 | $15.2K | 0.00% | −121−38.1% | Reduced |
| Quent Capital, LLC | 203 | $15.7K | 0.00% | +203 | New |
| NBC Securities, Inc. | 204 | $15.7K | 0.00% | +9+4.6% | Added |
| Massmutual Trust Co FSB | 231 | $17.8K | 0.00% | +101+77.7% | Added |
| Spire Wealth Management | 272 | $21.0K | 0.00% | +127+87.6% | Added |
| FNY Investment Advisers, LLC | 273 | $21.0K | 0.01% | +273 | New |
| National Bank of Canada | 287 | $22.1K | 0.00% | +50+21.1% | Added |
| IFP Advisors, Inc | 287 | $22.1K | 0.00% | +28+10.8% | Added |
| Pathway Financial Advisers, LLC | 289 | $22.3K | 0.01% | +289 | New |
| Rockefeller Capital Management L.P. | 299 | $23.1K | 0.00% | +299 | New |
| Fifth Third Bancorp | 328 | $25.3K | 0.00% | +39+13.5% | Added |
| Nisa Investment Advisors, LLC | 332 | $25.6K | 0.00% | +34+11.4% | Added |
| Huntington National Bank | 350 | $27.0K | 0.00% | +3+0.9% | Added |
| Arcadia Investment Management Corp | 350 | $27.0K | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 366 | $28.2K | 0.02% | +366 | New |
| Point72 Europe (London) LLP | 373 | $28.7K | 0.00% | +373 | New |
| Jones Financial Companies LLLP | 406 | $31.5K | 0.00% | +106+35.3% | Added |
| GAMMA Investing LLC | 441 | $34.0K | 0.00% | −4−0.9% | Reduced |
| Signaturefd, LLC | 454 | $35.0K | 0.00% | −186−29.1% | Reduced |
| Itau Unibanco Holding S.A. | 497 | $38.3K | 0.00% | −503−50.3% | Reduced |
| Farther Finance Advisors, LLC | 503 | $38.8K | 0.00% | −1,418−73.8% | Reduced |
| Umb Bank N A | 578 | $44.5K | 0.00% | +13+2.3% | Added |
| Transamerica Financial Advisors, Inc. | 586 | $45.1K | 0.00% | +148+33.8% | Added |
| Quest Partners LLC | 644 | $49.6K | 0.00% | −86−11.8% | Reduced |
| CIBC Private Wealth Group, LLC | 686 | $52.9K | 0.00% | +686 | New |
| CWM, LLC | 683 | $53.0K | 0.00% | +116+20.5% | Added |
| Hantz Financial Services, Inc. | 740 | $57.0K | 0.00% | +476+180.3% | Added |
| GWM Advisors LLC | 745 | $57.4K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 778 | $60.0K | 0.00% | +286+58.1% | Added |
| STRS Ohio | 799 | $61.6K | 0.00% | 00.0% | Unchanged |
| Nomura Asset Management Co Ltd | 896 | $69.0K | 0.00% | 00.0% | Unchanged |
| Grey Fox Wealth Advisors, LLC | 1,154 | $88.9K | 0.02% | +1,154 | New |
| MAI Capital Management | 1,310 | $100.9K | 0.00% | −38−2.8% | Reduced |
| Allworth Financial LP | 1,442 | $111.1K | 0.00% | +33+2.3% | Added |
| Kimelman & Baird, LLC | 1,500 | $115.6K | 0.01% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 1,532 | $118.1K | 0.00% | −960−38.5% | Reduced |
| The PNC Financial Services Group, Inc. | 1,544 | $119.0K | 0.00% | +111+7.7% | Added |
| Public Employees Retirement Association of Colorado | 1,704 | $131.0K | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 1,779 | $137.0K | 0.08% | +1,020+134.4% | Added |
| Sterling Capital Management LLC | 2,066 | $159.2K | 0.00% | −210−9.2% | Reduced |
| California State Teachers Retirement System | 2,089 | $161.0K | 0.00% | +2+0.1% | Added |