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 |
|---|---|---|---|---|---|
| Orbis Allan Gray Ltd | 3,914,411 | $301.6M | 1.29% | +3,914,411 | New |
| Vanguard Group Inc | 3,439,631 | $265.1M | 0.00% | −83,179−2.4% | Reduced |
| BlackRock, Inc. | 3,185,736 | $245.5M | 0.00% | −142,960−4.3% | Reduced |
| Victory Capital Management Inc | 2,866,360 | $220.9M | 0.14% | −855,382−23.0% | Reduced |
| Price T Rowe Associates Inc | 2,208,143 | $170.2M | 0.02% | +149,555+7.3% | Added |
| Brandes Investment Partners, LP | 1,548,694 | $119.3M | 0.96% | +91,823+6.3% | Added |
| Dimensional Fund Advisors LP | 1,300,240 | $100.2M | 0.02% | +25,071+2.0% | Added |
| State Street Corp | 1,295,242 | $99.8M | 0.00% | −96,985−7.0% | Reduced |
| Citadel Advisors LLC | 1,200,851 | $92.5M | 0.07% | +1,188,545+9,658.3% | Added |
| Goldman Sachs Group Inc | 1,051,397 | $81.0M | 0.01% | −7,546−0.7% | Reduced |
| UBS Asset Management Americas Inc | 917,273 | $70.7M | 0.02% | +265,447+40.7% | Added |
| Jacobs Levy Equity Management, Inc | 860,723 | $66.3M | 0.26% | −124,535−12.6% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 855,976 | $66.0M | 0.11% | +11,846+1.4% | Added |
| Holocene Advisors, LP | 854,184 | $65.8M | 0.15% | +696,029+440.1% | Added |
| Morgan Stanley | 815,629 | $62.9M | 0.00% | +353,141+76.4% | Added |
| Nuveen, LLC | 686,539 | $52.9M | 0.01% | −199,589−22.5% | Reduced |
| Geode Capital Management, LLC | 653,086 | $50.3M | 0.00% | +78,855+13.7% | Added |
| UBS Group AG | 560,480 | $43.2M | 0.01% | +117,013+26.4% | Added |
| Antipodes Partners Ltd | 555,904 | $42.8M | 0.96% | −267,265−32.5% | Reduced |
| Allspring Global Investments Holdings, LLC | 546,151 | $41.9M | 0.07% | +25,414+4.9% | Added |
| Balyasny Asset Management LLC | 475,743 | $36.7M | 0.07% | +395,896+495.8% | Added |
| Thompson Siegel & Walmsley LLC | 441,340 | $34.0M | 0.55% | +441,340 | New |
| ProShare Advisors LLC | 422,640 | $32.6M | 0.07% | +67,486+19.0% | Added |
| Voloridge Investment Management, LLC | 394,307 | $30.4M | 0.10% | −125,949−24.2% | Reduced |
| Royal Bank of Canada | 381,586 | $29.4M | 0.01% | +163,094+74.6% | Added |
| Caisse de Depot Et Placement du Quebec | 368,318 | $28.4M | 0.05% | +368,318 | New |
| Janus Henderson Group PLC | 365,984 | $28.2M | 0.01% | +151,703+70.8% | Added |
| FMR LLC | 314,350 | $24.2M | 0.00% | −1,300,888−80.5% | Reduced |
| New York State Common Retirement Fund | 309,626 | $23.9M | 0.03% | +3,200+1.0% | Added |
| Arrowstreet Capital, Limited Partnership | 299,728 | $23.1M | 0.01% | +9,690+3.3% | Added |
| Charles Schwab Investment Management Inc | 272,962 | $21.0M | 0.00% | +16,117+6.3% | Added |
| Merewether Investment Management, LP | 268,400 | $20.7M | 0.49% | +268,400 | New |
| Schroder Investment Management Group | 261,562 | $20.1M | 0.02% | +12,581+5.1% | Added |
| Erste Asset Management GmbH | 260,000 | $20.0M | 0.19% | +88,499+51.6% | Added |
| Northern Trust Corp | 238,139 | $18.4M | 0.00% | +5,177+2.2% | Added |
| Bank of America Corp | 208,897 | $16.1M | 0.00% | +70,243+50.7% | Added |
| Kempen Capital Management N.V. | 196,043 | $15.1M | 0.13% | +13,144+7.2% | Added |
| Woodline Partners LP | 193,786 | $14.9M | 0.07% | −133,504−40.8% | Reduced |
| BNP Paribas Arbitrage, SA | 190,966 | $14.7M | 0.01% | +5,569+3.0% | Added |
| Deprince Race & Zollo Inc | 189,009 | $14.6M | 0.29% | −64,361−25.4% | Reduced |
| Russell Investments Group, Ltd. | 184,631 | $14.2M | 0.02% | +55,465+42.9% | Added |
| Robotti Robert | 181,851 | $14.0M | 2.43% | −989−0.5% | Reduced |
| Bank of New York Mellon Corp | 177,982 | $13.7M | 0.00% | −6,330−3.4% | Reduced |
| Teachers Retirement System of the State of Kentucky | 165,315 | $12.7M | 0.10% | +60,300+57.4% | Added |
| First Trust Advisors LP | 164,936 | $12.7M | 0.01% | +37,007+28.9% | Added |
| D. E. Shaw & Co., Inc. | 160,009 | $12.3M | 0.01% | −182,951−53.3% | Reduced |
| JPMorgan Chase & Co | 157,794 | $12.2M | 0.00% | −9,801−5.8% | Reduced |
| Walleye Capital LLC | 148,317 | $11.4M | 0.09% | +36,119+32.2% | Added |
| 1832 Asset Management L.P. | 138,920 | $10.7M | 0.02% | 00.0% | Unchanged |
| Invesco Ltd. | 134,699 | $10.4M | 0.00% | +10,135+8.1% | Added |
| Sprott Inc. | 130,000 | $10.0M | 0.38% | +5,000+4.0% | Added |
| Alyeska Investment Group, L.P. | 119,986 | $9.25M | 0.03% | −118,142−49.6% | Reduced |
| Citigroup Inc | 117,151 | $9.03M | 0.01% | +44,525+61.3% | Added |
| Impala Asset Management LLC | 115,000 | $8.86M | 5.50% | +115,000 | New |
| Ilex Capital Partners (UK) LLP | 110,691 | $8.53M | 0.27% | −162,873−59.5% | Reduced |
| Lloyd Harbor Capital Management, LLC | 110,000 | $8.48M | 4.07% | +110,000 | New |
| Millennium Management LLC | 106,320 | $8.19M | 0.01% | −683,526−86.5% | Reduced |
| Two Sigma Investments, LP | 102,965 | $7.93M | 0.01% | −19,150−15.7% | Reduced |
| Barclays PLC | 101,662 | $7.83M | 0.00% | +30,623+43.1% | Added |
| Janney Montgomery Scott LLC | 100,998 | $7.78M | 0.02% | +300.0% | Added |
| Squarepoint Ops LLC | 100,391 | $7.74M | 0.02% | +5,908+6.3% | Added |
| HITE Hedge Asset Management LLC | 100,000 | $7.71M | 0.42% | −14,487−12.7% | Reduced |
| Wells Fargo & Company | 97,129 | $7.48M | 0.00% | +11,695+13.7% | Added |
| Zimmer Partners, LP | 90,000 | $6.94M | 0.17% | +90,000 | New |
| Rhumbline Advisers | 88,859 | $6.85M | 0.01% | −1,769−2.0% | Reduced |
| Point72 Asset Management, L.P. | 84,884 | $6.54M | 0.01% | +84,884 | New |
| Ameriprise Financial Inc | 84,437 | $6.51M | 0.00% | −15,097−15.2% | Reduced |
| Cerity Partners LLC | 83,079 | $6.40M | 0.01% | −3,714−4.3% | Reduced |
| Aventail Capital Group, LP | 78,340 | $6.04M | 0.29% | +78,340 | New |
| Jump Financial, LLC | 77,894 | $6.00M | 0.08% | +77,894 | New |
| Principal Financial Group Inc | 74,113 | $5.71M | 0.00% | −1,493−2.0% | Reduced |
| Two Sigma Advisers, LP | 73,700 | $5.68M | 0.01% | −84,800−53.5% | Reduced |
| Lazard Asset Management LLC | 72,622 | $5.60M | 0.01% | −1,450−2.0% | Reduced |
| Nomura Holdings Inc | 69,220 | $5.33M | 0.02% | +69,220 | New |
| Alliancebernstein L.P. | 66,762 | $5.14M | 0.00% | −1,851−2.7% | Reduced |
| Quantinno Capital Management LP | 65,235 | $5.03M | 0.01% | +35,004+115.8% | Added |
| Concentric Capital Strategies, LP | 64,158 | $4.94M | 0.24% | +11,271+21.3% | Added |
| Tudor Investment Corp Et Al | 62,600 | $4.82M | 0.03% | +62,600 | New |
| Walnut Level Capital LLC | 57,679 | $4.44M | 3.15% | +57,679 | New |
| Wellington Management Group LLP | 57,510 | $4.43M | 0.00% | +57,510 | New |
| Dark Forest Capital Management LP | 57,492 | $4.43M | 0.17% | −34,999−37.8% | Reduced |
| Quantbot Technologies LP | 56,785 | $4.38M | 0.12% | +56,785 | New |
| Marshall Wace, LLP | 56,461 | $4.35M | 0.00% | +48,350+596.1% | Added |
| Storebrand Asset Management AS | 56,129 | $4.33M | 0.01% | −30,023−34.8% | Reduced |
| AQR Capital Management LLC | 52,522 | $4.01M | 0.00% | −80,833−60.6% | Reduced |
| HRT Financial LP | 47,624 | $3.67M | 0.01% | +47,624 | New |
| California Public Employees Retirement System | 46,784 | $3.61M | 0.00% | −13,088−21.9% | Reduced |
| Thomist Capital Management, LP | 46,200 | $3.56M | 1.11% | −25,400−35.5% | Reduced |
| Schonfeld Strategic Advisors LLC | 45,990 | $3.54M | 0.02% | +35,101+322.4% | Added |
| Bank of Montreal | 45,165 | $3.48M | 0.00% | −185,857−80.4% | Reduced |
| Journey Advisory Group, LLC | 45,072 | $3.47M | 0.26% | +230+0.5% | Added |
| Retirement Systems of Alabama | 40,315 | $3.11M | 0.01% | −436−1.1% | Reduced |
| Wedge Capital Management L L P | 39,375 | $3.03M | 0.05% | −93,026−70.3% | Reduced |
| Legal & General Group Plc | 36,632 | $2.82M | 0.00% | −38,447−51.2% | Reduced |
| CI Private Wealth, LLC | 33,026 | $2.54M | 0.00% | +24,061+268.4% | Added |
| Cubist Systematic Strategies, LLC | 31,396 | $2.42M | 0.03% | +31,396 | New |
| Aquatic Capital Management LLC | 29,130 | $2.24M | 0.04% | +29,130 | New |
| Amundi | 26,773 | $2.19M | 0.00% | −42,898−61.6% | Reduced |
| Comerica Bank | 28,262 | $2.18M | 0.01% | −6,071−17.7% | Reduced |
| Manufacturers Life Insurance Company, The | 28,080 | $2.16M | 0.00% | −54−0.2% | Reduced |