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 |
|---|---|---|---|---|---|
| Renaissance Technologies LLC | 25,900 | $2.00M | 0.00% | −118,300−82.0% | Reduced |
| Verition Fund Management LLC | 27,155 | $2.09M | 0.01% | −14,768−35.2% | Reduced |
| Occudo Quantitative Strategies LP | 27,412 | $2.11M | 0.26% | +12,287+81.2% | Added |
| Envestnet Asset Management Inc | 27,446 | $2.12M | 0.00% | +7,050+34.6% | Added |
| KBC Group NV | 27,556 | $2.12M | 0.01% | −20,458−42.6% | Reduced |
| Manufacturers Life Insurance Company, The | 28,080 | $2.16M | 0.00% | −54−0.2% | Reduced |
| Comerica Bank | 28,262 | $2.18M | 0.01% | −6,071−17.7% | Reduced |
| Amundi | 26,773 | $2.19M | 0.00% | −42,898−61.6% | Reduced |
| Aquatic Capital Management LLC | 29,130 | $2.24M | 0.04% | +29,130 | New |
| Cubist Systematic Strategies, LLC | 31,396 | $2.42M | 0.03% | +31,396 | New |
| CI Private Wealth, LLC | 33,026 | $2.54M | 0.00% | +24,061+268.4% | Added |
| Legal & General Group Plc | 36,632 | $2.82M | 0.00% | −38,447−51.2% | Reduced |
| Wedge Capital Management L L P | 39,375 | $3.03M | 0.05% | −93,026−70.3% | Reduced |
| Retirement Systems of Alabama | 40,315 | $3.11M | 0.01% | −436−1.1% | Reduced |
| Journey Advisory Group, LLC | 45,072 | $3.47M | 0.26% | +230+0.5% | Added |
| Bank of Montreal | 45,165 | $3.48M | 0.00% | −185,857−80.4% | Reduced |
| Schonfeld Strategic Advisors LLC | 45,990 | $3.54M | 0.02% | +35,101+322.4% | Added |
| Thomist Capital Management, LP | 46,200 | $3.56M | 1.11% | −25,400−35.5% | Reduced |
| California Public Employees Retirement System | 46,784 | $3.61M | 0.00% | −13,088−21.9% | Reduced |
| HRT Financial LP | 47,624 | $3.67M | 0.01% | +47,624 | New |
| AQR Capital Management LLC | 52,522 | $4.01M | 0.00% | −80,833−60.6% | Reduced |
| Storebrand Asset Management AS | 56,129 | $4.33M | 0.01% | −30,023−34.8% | Reduced |
| Marshall Wace, LLP | 56,461 | $4.35M | 0.00% | +48,350+596.1% | Added |
| Quantbot Technologies LP | 56,785 | $4.38M | 0.12% | +56,785 | New |
| Dark Forest Capital Management LP | 57,492 | $4.43M | 0.17% | −34,999−37.8% | Reduced |
| Wellington Management Group LLP | 57,510 | $4.43M | 0.00% | +57,510 | New |
| Walnut Level Capital LLC | 57,679 | $4.44M | 3.15% | +57,679 | New |
| Tudor Investment Corp Et Al | 62,600 | $4.82M | 0.03% | +62,600 | New |
| Concentric Capital Strategies, LP | 64,158 | $4.94M | 0.24% | +11,271+21.3% | Added |
| Quantinno Capital Management LP | 65,235 | $5.03M | 0.01% | +35,004+115.8% | Added |
| Alliancebernstein L.P. | 66,762 | $5.14M | 0.00% | −1,851−2.7% | Reduced |
| Nomura Holdings Inc | 69,220 | $5.33M | 0.02% | +69,220 | New |
| Lazard Asset Management LLC | 72,622 | $5.60M | 0.01% | −1,450−2.0% | Reduced |
| Two Sigma Advisers, LP | 73,700 | $5.68M | 0.01% | −84,800−53.5% | Reduced |
| Principal Financial Group Inc | 74,113 | $5.71M | 0.00% | −1,493−2.0% | Reduced |
| Jump Financial, LLC | 77,894 | $6.00M | 0.08% | +77,894 | New |
| Aventail Capital Group, LP | 78,340 | $6.04M | 0.29% | +78,340 | New |
| Cerity Partners LLC | 83,079 | $6.40M | 0.01% | −3,714−4.3% | Reduced |
| Ameriprise Financial Inc | 84,437 | $6.51M | 0.00% | −15,097−15.2% | Reduced |
| Point72 Asset Management, L.P. | 84,884 | $6.54M | 0.01% | +84,884 | New |
| Rhumbline Advisers | 88,859 | $6.85M | 0.01% | −1,769−2.0% | Reduced |
| Zimmer Partners, LP | 90,000 | $6.94M | 0.17% | +90,000 | New |
| Wells Fargo & Company | 97,129 | $7.48M | 0.00% | +11,695+13.7% | Added |
| HITE Hedge Asset Management LLC | 100,000 | $7.71M | 0.42% | −14,487−12.7% | Reduced |
| Squarepoint Ops LLC | 100,391 | $7.74M | 0.02% | +5,908+6.3% | Added |
| Janney Montgomery Scott LLC | 100,998 | $7.78M | 0.02% | +300.0% | Added |
| Barclays PLC | 101,662 | $7.83M | 0.00% | +30,623+43.1% | Added |
| Two Sigma Investments, LP | 102,965 | $7.93M | 0.01% | −19,150−15.7% | Reduced |
| Millennium Management LLC | 106,320 | $8.19M | 0.01% | −683,526−86.5% | Reduced |
| Lloyd Harbor Capital Management, LLC | 110,000 | $8.48M | 4.07% | +110,000 | New |
| Ilex Capital Partners (UK) LLP | 110,691 | $8.53M | 0.27% | −162,873−59.5% | Reduced |
| Impala Asset Management LLC | 115,000 | $8.86M | 5.50% | +115,000 | New |
| Citigroup Inc | 117,151 | $9.03M | 0.01% | +44,525+61.3% | Added |
| Alyeska Investment Group, L.P. | 119,986 | $9.25M | 0.03% | −118,142−49.6% | Reduced |
| Sprott Inc. | 130,000 | $10.0M | 0.38% | +5,000+4.0% | Added |
| Invesco Ltd. | 134,699 | $10.4M | 0.00% | +10,135+8.1% | Added |
| 1832 Asset Management L.P. | 138,920 | $10.7M | 0.02% | 00.0% | Unchanged |
| Walleye Capital LLC | 148,317 | $11.4M | 0.09% | +36,119+32.2% | Added |
| JPMorgan Chase & Co | 157,794 | $12.2M | 0.00% | −9,801−5.8% | Reduced |
| D. E. Shaw & Co., Inc. | 160,009 | $12.3M | 0.01% | −182,951−53.3% | Reduced |
| First Trust Advisors LP | 164,936 | $12.7M | 0.01% | +37,007+28.9% | Added |
| Teachers Retirement System of the State of Kentucky | 165,315 | $12.7M | 0.10% | +60,300+57.4% | Added |
| Bank of New York Mellon Corp | 177,982 | $13.7M | 0.00% | −6,330−3.4% | Reduced |
| Robotti Robert | 181,851 | $14.0M | 2.43% | −989−0.5% | Reduced |
| Russell Investments Group, Ltd. | 184,631 | $14.2M | 0.02% | +55,465+42.9% | Added |
| Deprince Race & Zollo Inc | 189,009 | $14.6M | 0.29% | −64,361−25.4% | Reduced |
| BNP Paribas Arbitrage, SA | 190,966 | $14.7M | 0.01% | +5,569+3.0% | Added |
| Woodline Partners LP | 193,786 | $14.9M | 0.07% | −133,504−40.8% | Reduced |
| Kempen Capital Management N.V. | 196,043 | $15.1M | 0.13% | +13,144+7.2% | Added |
| Bank of America Corp | 208,897 | $16.1M | 0.00% | +70,243+50.7% | Added |
| Northern Trust Corp | 238,139 | $18.4M | 0.00% | +5,177+2.2% | Added |
| Erste Asset Management GmbH | 260,000 | $20.0M | 0.19% | +88,499+51.6% | Added |
| Schroder Investment Management Group | 261,562 | $20.1M | 0.02% | +12,581+5.1% | Added |
| Merewether Investment Management, LP | 268,400 | $20.7M | 0.49% | +268,400 | New |
| Charles Schwab Investment Management Inc | 272,962 | $21.0M | 0.00% | +16,117+6.3% | Added |
| Arrowstreet Capital, Limited Partnership | 299,728 | $23.1M | 0.01% | +9,690+3.3% | Added |
| New York State Common Retirement Fund | 309,626 | $23.9M | 0.03% | +3,200+1.0% | Added |
| FMR LLC | 314,350 | $24.2M | 0.00% | −1,300,888−80.5% | Reduced |
| Janus Henderson Group PLC | 365,984 | $28.2M | 0.01% | +151,703+70.8% | Added |
| Caisse de Depot Et Placement du Quebec | 368,318 | $28.4M | 0.05% | +368,318 | New |
| Royal Bank of Canada | 381,586 | $29.4M | 0.01% | +163,094+74.6% | Added |
| Voloridge Investment Management, LLC | 394,307 | $30.4M | 0.10% | −125,949−24.2% | Reduced |
| ProShare Advisors LLC | 422,640 | $32.6M | 0.07% | +67,486+19.0% | Added |
| Thompson Siegel & Walmsley LLC | 441,340 | $34.0M | 0.55% | +441,340 | New |
| Balyasny Asset Management LLC | 475,743 | $36.7M | 0.07% | +395,896+495.8% | Added |
| Allspring Global Investments Holdings, LLC | 546,151 | $41.9M | 0.07% | +25,414+4.9% | Added |
| Antipodes Partners Ltd | 555,904 | $42.8M | 0.96% | −267,265−32.5% | Reduced |
| UBS Group AG | 560,480 | $43.2M | 0.01% | +117,013+26.4% | Added |
| Geode Capital Management, LLC | 653,086 | $50.3M | 0.00% | +78,855+13.7% | Added |
| Nuveen, LLC | 686,539 | $52.9M | 0.01% | −199,589−22.5% | Reduced |
| Morgan Stanley | 815,629 | $62.9M | 0.00% | +353,141+76.4% | Added |
| Holocene Advisors, LP | 854,184 | $65.8M | 0.15% | +696,029+440.1% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 855,976 | $66.0M | 0.11% | +11,846+1.4% | Added |
| Jacobs Levy Equity Management, Inc | 860,723 | $66.3M | 0.26% | −124,535−12.6% | Reduced |
| UBS Asset Management Americas Inc | 917,273 | $70.7M | 0.02% | +265,447+40.7% | Added |
| Goldman Sachs Group Inc | 1,051,397 | $81.0M | 0.01% | −7,546−0.7% | Reduced |
| Citadel Advisors LLC | 1,200,851 | $92.5M | 0.07% | +1,188,545+9,658.3% | Added |
| State Street Corp | 1,295,242 | $99.8M | 0.00% | −96,985−7.0% | Reduced |
| Dimensional Fund Advisors LP | 1,300,240 | $100.2M | 0.02% | +25,071+2.0% | Added |
| Brandes Investment Partners, LP | 1,548,694 | $119.3M | 0.96% | +91,823+6.3% | Added |