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 |
|---|---|---|---|---|---|
| Thomist Capital Management, LP | 96,200 | $7.02M | 2.59% | +23,200+31.8% | Added |
| Royal Bank of Canada | 96,772 | $7.07M | 0.00% | −7,179−6.9% | Reduced |
| Mackenzie Financial Corp | 104,903 | $7.66M | 0.01% | +32,935+45.8% | Added |
| Alliancebernstein L.P. | 65,993 | $7.71M | 0.00% | −1,322−2.0% | Reduced |
| Wells Fargo & Company | 105,936 | $7.73M | 0.00% | −769−0.7% | Reduced |
| Tudor Investment Corp Et Al | 110,710 | $8.08M | 0.03% | +110,710 | New |
| Marshall Wace, LLP | 111,574 | $8.14M | 0.01% | +111,574 | New |
| HRT Financial LP | 116,395 | $8.50M | 0.02% | +116,395 | New |
| Quantinno Capital Management LP | 123,228 | $9.00M | 0.01% | +1,784+1.5% | Added |
| Recurrent Investment Advisors LLC | 128,771 | $9.40M | 0.58% | +15,981+14.2% | Added |
| Lighthouse Investment Partners, LLC | 135,361 | $9.88M | 0.31% | +135,361 | New |
| Wellington Management Group LLP | 141,816 | $10.4M | 0.00% | −1,651,701−92.1% | Reduced |
| Campbell & CO Investment Adviser LLC | 148,180 | $10.8M | 0.57% | +148,180 | New |
| Teachers Retirement System of the State of Kentucky | 156,757 | $11.4M | 0.08% | −21,403−12.0% | Reduced |
| Sprott Inc. | 160,110 | $11.7M | 0.39% | +27,500+20.7% | Added |
| Allspring Global Investments Holdings, LLC | 163,075 | $11.9M | 0.02% | −122,359−42.9% | Reduced |
| Bank of New York Mellon Corp | 163,455 | $11.9M | 0.00% | −17,615−9.7% | Reduced |
| Cerity Partners LLC | 166,436 | $12.1M | 0.01% | +93,757+129.0% | Added |
| JPMorgan Chase & Co | 163,287 | $12.3M | 0.00% | +65,548+67.1% | Added |
| Invesco Ltd. | 190,951 | $13.9M | 0.00% | +11,549+6.4% | Added |
| Russell Investments Group, Ltd. | 194,362 | $14.2M | 0.01% | +105,000+117.5% | Added |
| D. E. Shaw & Co., Inc. | 200,534 | $14.6M | 0.01% | −32,649−14.0% | Reduced |
| Vanguard Fiduciary Trust Co | 209,650 | $15.3M | 0.00% | +3,966+1.9% | Added |
| Jump Financial, LLC | 209,861 | $15.3M | 0.14% | +209,861 | New |
| Norges Bank | 214,101 | $15.6M | 0.00% | +214,101 | New |
| ProShare Advisors LLC | 228,319 | $16.7M | 0.02% | −67,492−22.8% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 230,396 | $16.8M | 0.27% | +212,024+1,154.1% | Added |
| Bank of America Corp | 232,213 | $17.0M | 0.00% | −4,773−2.0% | Reduced |
| Robotti Robert | 235,379 | $17.2M | 2.77% | +90,375+62.3% | Added |
| Northern Trust Corp | 262,926 | $19.2M | 0.00% | −6,223−2.3% | Reduced |
| Jupiter Topco LLC | 267,748 | $19.5M | 0.01% | +267,748 | New |
| Kempen Capital Management N.V. | 268,434 | $19.6M | 0.15% | +24,126+9.9% | Added |
| Erste Asset Management GmbH | 305,000 | $22.8M | 0.18% | −90,000−22.8% | Reduced |
| Charles Schwab Investment Management Inc | 318,823 | $23.3M | 0.00% | +7,061+2.3% | Added |
| Qube Research & Technologies Ltd | 321,718 | $23.5M | 0.03% | +321,718 | New |
| ExodusPoint Capital Management, LP | 327,195 | $23.9M | 0.22% | +327,195 | New |
| FMR LLC | 361,243 | $26.4M | 0.00% | −951,230−72.5% | Reduced |
| Millennium Management LLC | 366,074 | $26.7M | 0.02% | +281,077+330.7% | Added |
| Schroder Investment Management Group | 375,889 | $28.1M | 0.02% | +1,381+0.4% | Added |
| UBS Group AG | 431,633 | $31.5M | 0.01% | −379,633−46.8% | Reduced |
| Morgan Stanley | 437,571 | $31.9M | 0.00% | −48,937−10.1% | Reduced |
| Nuveen, LLC | 446,479 | $32.6M | 0.01% | −118,265−20.9% | Reduced |
| Woodline Partners LP | 451,986 | $33.0M | 0.10% | +114,911+34.1% | Added |
| Balyasny Asset Management LLC | 625,859 | $45.7M | 0.08% | +256,187+69.3% | Added |
| Jacobs Levy Equity Management, Inc | 709,355 | $51.8M | 0.19% | +360,320+103.2% | Added |
| Geode Capital Management, LLC | 718,597 | $52.5M | 0.00% | +104,263+17.0% | Added |
| UBS Asset Management Americas Inc | 817,207 | $59.7M | 0.01% | −164,198−16.7% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 1,023,403 | $74.7M | 0.09% | +79,428+8.4% | Added |
| Citadel Advisors LLC | 1,054,868 | $77.0M | 0.04% | +339,282+47.4% | Added |
| Goldman Sachs Group Inc | 1,280,873 | $93.5M | 0.01% | −112,454−8.1% | Reduced |
| State Street Corp | 1,453,407 | $106.1M | 0.00% | +72,914+5.3% | Added |
| Vanguard Capital Management LLC | 1,464,223 | $106.9M | 0.00% | +8,629+0.6% | Added |
| AQR Capital Management LLC | 1,570,453 | $114.6M | 0.04% | +1,310,383+503.9% | Added |
| Brandes Investment Partners, LP | 1,572,939 | $114.8M | 0.80% | −269,711−14.6% | Reduced |
| Vanguard Portfolio Management LLC | 1,752,627 | $127.9M | 0.01% | −17,181−1.0% | Reduced |
| Dimensional Fund Advisors LP | 2,051,554 | $149.8M | 0.03% | +585,534+39.9% | Added |
| Orbis Allan Gray Ltd | 2,084,364 | $152.2M | 0.52% | −3,209,155−60.6% | Reduced |
| Price T Rowe Associates Inc | 2,206,676 | $161.1M | 0.02% | −200,781−8.3% | Reduced |
| Capital World Investors | 2,842,348 | $207.5M | 0.02% | −1,368,658−32.5% | Reduced |
| BlackRock, Inc. | 3,294,162 | $240.5M | 0.00% | +215,075+7.0% | Added |
| Holocene Advisors, LP | 0 | $0 | 0.00% | −730,035−100.0% | Sold out |
| Deprince Race & Zollo Inc | 0 | $0 | 0.00% | −203,366−100.0% | Sold out |
| Ceredex Value Advisors LLC | 0 | $0 | 0.00% | −177,900−100.0% | Sold out |
| Yaupon Capital Management LP | 0 | $0 | 0.00% | −107,044−100.0% | Sold out |
| Lloyd Harbor Capital Management, LLC | 0 | $0 | 0.00% | −62,000−100.0% | Sold out |
| Rokos Capital Management LLP | 0 | $0 | 0.00% | −60,800−100.0% | Sold out |
| Albar Capital Partners LLP | 0 | $0 | 0.00% | −48,814−100.0% | Sold out |
| BCJ Capital Management, LLC | 0 | $0 | 0.00% | −45,296−100.0% | Sold out |
| Twin Tree Management, LP | 0 | $0 | 0.00% | −35,977−100.0% | Sold out |
| Boston Partners | 0 | $0 | 0.00% | −31,696−100.0% | Sold out |
| Occam Crest Management LP | 0 | $0 | 0.00% | −29,256−100.0% | Sold out |
| California Public Employees Retirement System | 0 | $0 | 0.00% | −25,000−100.0% | Sold out |
| AMG National Trust Bank | 0 | $0 | 0.00% | −23,041−100.0% | Sold out |
| Duquesne Family Office LLCSuperinvestorDuquesne Family Office | 0 | $0 | 0.00% | −21,194−100.0% | Sold out |
| Edgestream Partners, L.P. | 0 | $0 | 0.00% | −17,681−100.0% | Sold out |
| Nomura Asset Management International Inc. | 0 | $0 | 0.00% | −13,868−100.0% | Sold out |
| Walnut Level Capital LLC | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 0 | $0 | 0.00% | −8,356−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −8,229−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −9,428−100.0% | Sold out |
| Capital Group Investment Management Pte. Ltd. | 0 | $0 | 0.00% | −7,693−100.0% | Sold out |
| Gateway Investment Advisers LLC | 0 | $0 | 0.00% | −7,147−100.0% | Sold out |
| Concentric Capital Strategies, LP | 0 | $0 | 0.00% | −6,517−100.0% | Sold out |
| CAPROCK Group, Inc. | 0 | $0 | 0.00% | −5,171−100.0% | Sold out |
| Thompson Siegel & Walmsley LLC | 0 | $0 | 0.00% | −2,976−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −2,950−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −2,931−100.0% | Sold out |
| ISAM Funds (UK) Ltd | 0 | $0 | 0.00% | −2,835−100.0% | Sold out |
| Archer Investment Corp | 0 | $0 | 0.00% | −2,493−100.0% | Sold out |
| Voya Investment Management LLC | 0 | $0 | 0.00% | −2,436−100.0% | Sold out |
| McMahon Financial Advisors, LLC | 0 | $0 | 0.00% | −2,382−100.0% | Sold out |
| HighTower Advisors, LLC | 0 | $0 | 0.00% | −2,305−100.0% | Sold out |
| Swiss Life Asset Management Ltd | 0 | $0 | 0.00% | −2,253−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −2,228−100.0% | Sold out |
| Empowered Funds, LLC | 0 | $0 | 0.00% | −2,162−100.0% | Sold out |
| Sivia Capital Partners, LLC | 0 | $0 | 0.00% | −2,099−100.0% | Sold out |
| Eagle Global Advisors LLC | 0 | $0 | 0.00% | −2,066−100.0% | Sold out |
| Callan Family Office, LLC | 0 | $0 | 0.00% | −2,017−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −1,997−100.0% | Sold out |
| Cercano Management LLC | 0 | $0 | 0.00% | −1,978−100.0% | Sold out |