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, Q4 2025
Institutional positions in Westlake Corp as of Dec 31, 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
- 298
- −1 vs. Q3 2025
- Shares held
- 46.4M
- +4.91M (+11.8%) vs. Q3 2025
- Total value
- $3.43B
- +$234.7M (+7.3%) vs. Q3 2025
- New holders
- 63
- 93 more added
- Sold out
- 64
- 112 more reduced
6 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Westlake Corp; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Penserra Capital Management LLC | 9 | $0 | 0.00% | 00.0% | Unchanged |
| Dunhill Financial, LLC | 1 | $53 | 0.00% | +1 | New |
| SBI Securities Co., Ltd. | 1 | $74 | 0.00% | 00.0% | Unchanged |
| HFM Investment Advisors, LLC | 1 | $74 | 0.00% | 00.0% | Unchanged |
| Hughes Financial Services, LLC | 1 | $74 | 0.00% | +1 | New |
| Keating Financial Advisory Services, Inc. | 1 | $74 | 0.00% | +1 | New |
| Valued Wealth Advisors LLC | 1 | $76 | 0.00% | 00.0% | Unchanged |
| Bay Harbor Wealth Management, LLC | 2 | $147 | 0.00% | +1+100.0% | Added |
| DiNuzzo Private Wealth, Inc. | 2 | $148 | 0.00% | −2−50.0% | Reduced |
| Optima Capital LLC | 3 | $222 | 0.00% | +3 | New |
| Cromwell Holdings LLC | 4 | $296 | 0.00% | +2+100.0% | Added |
| MV Capital Management, Inc. | 5 | $370 | 0.00% | −36−87.8% | Reduced |
| SWAN Capital LLC | 5 | $370 | 0.00% | 00.0% | Unchanged |
| Rakuten Securities, Inc. | 6 | $444 | 0.00% | +5+500.0% | Added |
| American Capital Advisory, LLC | 7 | $518 | 0.00% | +7 | New |
| Rialto Wealth Management, LLC | 7 | $518 | 0.00% | +7 | New |
| Picton Mahoney Asset Management | 8 | $592 | 0.00% | 00.0% | Unchanged |
| South State Corp. | 8 | $592 | 0.00% | −3−27.3% | Reduced |
| Principia Wealth Advisory, LLC | 8 | $592 | 0.00% | 00.0% | Unchanged |
| Raffa Wealth Management, LLC | 9 | $665 | 0.00% | 00.0% | Unchanged |
| Fortitude Family Office, LLC | 10 | $739 | 0.00% | −4−28.6% | Reduced |
| Ogorek Anthony Joseph | 18 | $1.00K | 0.00% | 00.0% | Unchanged |
| Avion Wealth | 14 | $1.00K | 0.00% | −3−17.6% | Reduced |
| JFS Wealth Advisors, LLC | 14 | $1.04K | 0.00% | +14 | New |
| Rothschild Investment LLC | 15 | $1.11K | 0.00% | −2−11.8% | Reduced |
| Versant Capital Management, Inc | 18 | $1.33K | 0.00% | −104−85.2% | Reduced |
| True Wealth Design, LLC | 18 | $1.33K | 0.00% | +14+350.0% | Added |
| AdvisorNet Financial, Inc | 19 | $1.41K | 0.00% | +19 | New |
| SRS Capital Advisors, Inc. | 20 | $1.48K | 0.00% | −6,963−99.7% | Reduced |
| Manchester Capital Management LLC | 21 | $1.55K | 0.00% | −63−75.0% | Reduced |
| Global Retirement Partners, LLC | 21 | $1.55K | 0.00% | +4+23.5% | Added |
| Brown Brothers Harriman & Co | 21 | $1.55K | 0.00% | +21 | New |
| Larson Financial Group LLC | 23 | $1.70K | 0.00% | 00.0% | Unchanged |
| Peterson Wealth Services | 23 | $1.70K | 0.00% | −1,812−98.7% | Reduced |
| Global Wealth Strategies & Associates | 23 | $1.70K | 0.00% | +23 | New |
| First Horizon Corp | 24 | $1.77K | 0.00% | −24−50.0% | Reduced |
| Steward Partners Investment Advisory, LLC | 24 | $1.77K | 0.00% | −37−60.7% | Reduced |
| Root Financial Partners, LLC | 24 | $1.77K | 0.00% | −13−35.1% | Reduced |
| CoreCap Advisors, LLC | 24 | $1.77K | 0.00% | +19+380.0% | Added |
| Farmers & Merchants Investments Inc | 30 | $2.22K | 0.00% | 00.0% | Unchanged |
| Bruce G. Allen Investments, LLC | 31 | $2.29K | 0.00% | −8−20.5% | Reduced |
| Torren Management, LLC | 34 | $2.50K | 0.00% | +34 | New |
| Private Wealth Management Group, LLC | 36 | $2.66K | 0.00% | −127−77.9% | Reduced |
| Harbour Investments, Inc. | 37 | $2.74K | 0.00% | +30+428.6% | Added |
| Assetmark, Inc | 39 | $2.88K | 0.00% | −55−58.5% | Reduced |
| IFP Advisors, Inc | 40 | $2.96K | 0.00% | −247−86.1% | Reduced |
| TD Waterhouse Canada Inc. | 40 | $2.96K | 0.00% | −10−20.0% | Reduced |
| SageView Advisory Group, LLC | 40 | $2.96K | 0.00% | +40 | New |
| Basecamp Wealth Advisors LLC | 40 | $2.96K | 0.00% | +40 | New |
| Nisa Investment Advisors, LLC | 50 | $3.70K | 0.00% | −282−84.9% | Reduced |
| Trust Co of Vermont | 50 | $3.70K | 0.00% | 00.0% | Unchanged |
| First Eagle Investment Management, LLC | 53 | $3.92K | 0.00% | +53 | New |
| Sachetta, LLC | 54 | $3.99K | 0.00% | +28+107.7% | Added |
| Pinnacle Bancorp, Inc. | 58 | $4.29K | 0.00% | +15+34.9% | Added |
| Pinnacle Wealth Planning Services, Inc. | 58 | $4.29K | 0.00% | +58 | New |
| Transce3nd, LLC | 71 | $5.80K | 0.05% | 00.0% | Unchanged |
| Private Trust Co NA | 90 | $6.66K | 0.00% | 00.0% | Unchanged |
| Ancora Advisors, LLC | 97 | $7.17K | 0.00% | +97 | New |
| Smartleaf Asset Management LLC | 101 | $7.56K | 0.00% | −19−15.8% | Reduced |
| Clearstead Advisors, LLC | 109 | $8.06K | 0.00% | +84+336.0% | Added |
| Huntington National Bank | 119 | $8.80K | 0.00% | −231−66.0% | Reduced |
| Deseret Mutual Benefit Administrators | 133 | $9.83K | 0.00% | +71+114.5% | Added |
| Signaturefd, LLC | 142 | $10.5K | 0.00% | −312−68.7% | Reduced |
| Los Angeles Capital Management LLC | 157 | $10.7K | 0.00% | +157 | New |
| Cullen/Frost Bankers, Inc. | 164 | $12.1K | 0.00% | +31+23.3% | Added |
| EverSource Wealth Advisors, LLC | 170 | $12.6K | 0.00% | −27−13.7% | Reduced |
| Ronald Blue Trust, Inc. | 186 | $13.8K | 0.00% | +171+1,140.0% | Added |
| CIBC Private Wealth Group, LLC | 191 | $14.1K | 0.00% | −495−72.2% | Reduced |
| NBC Securities, Inc. | 204 | $15.1K | 0.00% | 00.0% | Unchanged |
| Quent Capital, LLC | 232 | $17.2K | 0.00% | +29+14.3% | Added |
| Parkside Financial Bank & Trust | 268 | $19.8K | 0.00% | +221+470.2% | Added |
| Massmutual Trust Co FSB | 274 | $20.3K | 0.00% | +43+18.6% | Added |
| National Bank of Canada | 275 | $20.3K | 0.00% | −12−4.2% | Reduced |
| Advisor Group Holdings, Inc. | 280 | $20.7K | 0.00% | −2,978−91.4% | Reduced |
| Farther Finance Advisors, LLC | 300 | $22.2K | 0.00% | −203−40.4% | Reduced |
| DV Trading LLC | 300 | $22.2K | 0.00% | +300 | New |
| Spire Wealth Management | 306 | $22.6K | 0.00% | +34+12.5% | Added |
| Jones Financial Companies LLLP | 306 | $22.6K | 0.00% | −100−24.6% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 338 | $25.0K | 0.00% | +338 | New |
| CWM, LLC | 346 | $26.0K | 0.00% | −337−49.3% | Reduced |
| Parallel Advisors, LLC | 355 | $26.2K | 0.00% | −423−54.4% | Reduced |
| Umb Bank N A | 393 | $29.1K | 0.00% | −185−32.0% | Reduced |
| Quarry LP | 426 | $31.5K | 0.01% | +426 | New |
| Quadrant Capital Group LLC | 447 | $33.1K | 0.00% | −7,444−94.3% | Reduced |
| GAMMA Investing LLC | 464 | $34.3K | 0.00% | +23+5.2% | Added |
| Fifth Third Bancorp | 562 | $41.6K | 0.00% | +234+71.3% | Added |
| GWM Advisors LLC | 745 | $55.1K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 764 | $56.5K | 0.00% | −768−50.1% | Reduced |
| STRS Ohio | 800 | $59.2K | 0.00% | +1+0.1% | Added |
| Transamerica Financial Advisors, Inc. | 805 | $59.5K | 0.00% | +219+37.4% | Added |
| Aster Capital Management (DIFC) Ltd | 820 | $60.6K | 0.03% | +820 | New |
| Nomura Asset Management Co Ltd | 896 | $66.3K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 955 | $70.6K | 0.00% | +656+219.4% | Added |
| Deutsche Bank AG | 1,084 | $80.2K | 0.00% | +1,084 | New |
| Kestra Advisory Services, LLC | 1,138 | $84.2K | 0.00% | +1,138 | New |
| MAI Capital Management | 1,316 | $97.3K | 0.00% | +6+0.5% | Added |
| The PNC Financial Services Group, Inc. | 1,335 | $98.7K | 0.00% | −209−13.5% | Reduced |
| Wexford Capital LP | 1,344 | $99.4K | 0.03% | +1,344 | New |
| Allworth Financial LP | 1,438 | $106.3K | 0.00% | −4−0.3% | Reduced |
| Kimelman & Baird, LLC | 1,500 | $110.9K | 0.01% | 00.0% | Unchanged |