WestlakeWLK
13F holders, Q1 2026 (March 31)339holders +41
86new positions
44sold out
7famous investors
$116.73avg. 13F price*
At the end of Q1 2026, 339 institutions reported holding Westlake Corp. (WLK) in their 13F filings, up 41 from Q4 2025. 86 opened new positions and 44 sold out. The largest holders were Orbis Allan Gray Ltd ($618.4M), Capital World Investors ($491.9M) and BlackRock, Inc. ($359.7M). 7 famous investors held it, including Stanley Druckenmiller (0.1% of Duquesne Family Office's portfolio), Ken Griffin (0.1% of Citadel Advisors's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Westlake Corp.
- CUSIP
- 960413102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 86 | $231.9M |
| Exits | 44 | $154.9M |
All 13F filers, Q4 2025 → Q1 2026: 8,889,330 shares bought and 10,390,415 shares sold, net −1,501,085 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 339 holders
| Orbis Allan Gray Ltd | 2.61% | Add +20.7% | 5,293,519 | $618.4M |
| Capital World Investors | 0.07% | Add +93.9% | 4,211,006 | $491.9M |
| BlackRock, Inc. | 0.01% | Reduce -5.6% | 3,079,087 | $359.7M |
| T. Rowe Price Associates Inc. | 0.03% | Add +9.0% | 2,407,457 | $281.2M |
| Brandes Investment Partners, LP | 1.52% | Add +10.3% | 1,842,650 | $215.3M |
| Wellington Management Group LLP | 0.04% | Reduce -57.5% | 1,793,517 | $209.5M |
| Vanguard Portfolio Management LLC | 0.01% | — | 1,769,808 | $206.7M |
| Dimensional Fund Advisors LP | 0.04% | Reduce -22.3% | 1,466,020 | $171.3M |
| Vanguard Capital Management LLC | 0.00% | — | 1,455,594 | $170.0M |
| Goldman Sachs Group Inc. | 0.02% | Add +84.8% | 1,393,327 | $162.8M |
| State Street Corp. | 0.01% | Reduce -1.2% | 1,380,493 | $161.3M |
| FMR LLC | 0.01% | Add +473.5% | 1,312,473 | $153.3M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.02% | Add +6.1% | 981,405 | $114.6M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.15% | Add +7.7% | 943,975 | $110.3M |
| UBS Group AG | 0.02% | Add +25.2% | 811,266 | $94.8M |
| Holocene Advisors, LP | 0.21% | Reduce -40.2% | 730,035 | $85.3M |
| Citadel Advisors | 0.06% | Add +252.0% | 715,586 | $83.6M |
| Geode Capital Management, LLC | 0.00% | Add +3.3% | 614,334 | $71.8M |
| Nuveen, LLC | 0.02% | Reduce -13.5% | 564,744 | $66.0M |
| Morgan Stanley | 0.00% | Reduce -36.0% | 486,508 | $56.8M |
| Erste Asset Management GmbH | 0.42% | Reduce -6.0% | 395,000 | $45.8M |
| Schroder Investment Management Group | 0.04% | New | 374,508 | $43.4M |
| Balyasny Asset Management L.P. | 0.09% | New | 369,672 | $43.2M |
| Jacobs Levy Equity Management, Inc. | 0.17% | Reduce -47.8% | 349,035 | $40.8M |
| Woodline Partners LP | 0.15% | Reduce -46.3% | 337,075 | $39.4M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +4.9% | 311,762 | $36.4M |
| New York State Common Retirement Fund | 0.05% | No change | 309,626 | $36.2M |
| ProShare Advisors LLC | 0.05% | Reduce -32.0% | 295,811 | $34.6M |
| Allspring Global Investments Holdings, LLC | 0.06% | Reduce -43.7% | 285,434 | $33.3M |
| Janus Henderson Group PLC | 0.02% | Reduce -19.4% | 269,783 | $31.5M |
| Northern Trust Corp. | 0.00% | Add +0.2% | 269,149 | $31.4M |
| Federated Hermes, Inc. | 0.05% | Add +147.5% | 266,651 | $31.2M |
| AQR Capital Management | 0.01% | Add +1166.5% | 260,070 | $30.4M |
| Van Lanschot Kempen Investment Management N.V. | 0.25% | Add +3.6% | 244,308 | $28.5M |
| Bank of America Corp. | 0.00% | Add +28.5% | 236,986 | $27.7M |
| D. E. Shaw & Co. | 0.02% | Reduce -52.0% | 233,183 | $27.2M |
| Merewether Investment Management, LP | 0.50% | Reduce -43.3% | 219,900 | $25.7M |
| Vanguard Fiduciary Trust Co. | 0.01% | — | 205,684 | $24.0M |
| Deprince Race & Zollo Inc. | 0.45% | Reduce -0.4% | 203,366 | $23.8M |
| Bank of New York Mellon Corp | 0.00% | Add +3.9% | 181,070 | $21.2M |
| Invesco Ltd. | 0.00% | Reduce -15.8% | 179,402 | $21.0M |
| Teachers Retirement System of the State of Kentucky | 0.16% | Add +7.8% | 178,160 | $20.8M |
| Ceredex Value Advisors LLC | 0.65% | Reduce -24.5% | 177,900 | $20.8M |
| Man Group plc | 0.04% | New | 160,286 | $18.7M |
| Robotti Robert | 2.64% | Reduce -43.4% | 145,004 | $16.9M |
| Capstone Investment Advisors, LLC | 0.18% | Add +4254.2% | 135,808 | $15.9M |
| Sprott Inc. | 0.47% | Reduce -5.3% | 132,610 | $15.5M |
| Quantinno Capital Management LP | 0.02% | Add +4.4% | 121,444 | $14.2M |
| Recurrent Investment Advisors LLC | 0.79% | Add +49.1% | 112,790 | $13.2M |
| Yaupon Capital Management LP | 0.62% | New | 107,044 | $12.5M |
| Wells Fargo & Company | 0.00% | Add +16.1% | 106,705 | $12.5M |
| Jane Street Group, LLC | 0.01% | New | 105,686 | $12.3M |
| Royal Bank of Canada | 0.00% | Add +21.9% | 103,951 | $12.1M |
| First Trust Advisors LP | 0.01% | Reduce -30.1% | 102,299 | $12.0M |
| JPMorgan Chase & Co. | 0.00% | Add +45.2% | 97,739 | $11.3M |
| Russell Investments Group, Ltd. | 0.01% | Reduce -43.6% | 89,362 | $10.4M |
| Rhumbline Advisers | 0.01% | Add +2.2% | 87,304 | $10.2M |
| Millennium Management | 0.01% | Reduce -80.1% | 84,997 | $9.9M |
| Meiji Yasuda Asset Management Co Ltd. | 0.46% | New | 79,478 | $9.3M |
| Swiss National Bank | 0.01% | No change | 75,900 | $8.9M |
| PDT Partners, LLC | 0.52% | Add +16.6% | 75,777 | $8.9M |
| Principal Financial Group Inc. | 0.00% | Add +3.9% | 74,481 | $8.7M |
| Thomist Capital Management, LP | 2.92% | Reduce -34.8% | 73,000 | $8.5M |
| Cerity Partners LLC | 0.01% | Reduce -42.8% | 72,679 | $8.5M |
| Agman Capital LLC | 6.72% | No change | 72,283 | $8.4M |
| Mackenzie Financial Corp. | 0.01% | Add +262.9% | 71,968 | $8.4M |
| Capital International Sarl | 0.12% | New | 63,634 | $7.4M |
| Lloyd Harbor Capital Management, LLC | 3.75% | New | 62,000 | $7.2M |
| Rokos Capital Management LLP | 0.13% | New | 60,800 | $7.1M |
| Walleye Capital LLC | 0.05% | Add +25.5% | 59,814 | $7.0M |
| Citigroup Inc. | 0.00% | Add +99.6% | 54,559 | $6.4M |
| Legal & General Group Plc | 0.00% | Reduce -11.4% | 50,737 | $5.9M |
| Albar Capital Partners LLP | 0.92% | New | 48,814 | $5.7M |
| Tidal Investments LLC | 0.02% | New | 47,820 | $5.5M |
| Victory Capital Management Inc. | 0.00% | Reduce -95.9% | 45,578 | $5.3M |
| Trek Financial, LLC | 0.28% | New | 45,296 | $5.3M |
| California State Teachers Retirement System | 0.01% | Add +23.2% | 44,459 | $5.2M |
| Occudo Quantitative Strategies LP | 0.28% | Add +76.5% | 44,430 | $5.1M |
| Alliancebernstein L.P. | 0.00% | Reduce -1.7% | 67,315 | $5.0M |
| Engineers Gate Manager LP | 0.06% | Reduce -85.3% | 42,499 | $5.0M |
| BI Asset Management Fondsmaeglerselskab A/S | 0.05% | Add +497.5% | 42,043 | $4.9M |
| Retirement Systems of Alabama | 0.02% | Add +2.1% | 40,886 | $4.8M |
| Bank of Montreal | 0.00% | Add +45.0% | 39,038 | $4.6M |
| Squarepoint Ops LLC | 0.01% | New | 38,532 | $4.5M |
| Capital International Ltd. | 0.16% | New | 37,300 | $4.4M |
| Twin Tree Management, LP | 0.88% | New | 35,977 | $4.2M |
| Corient Private Wealth LP | 0.01% | Reduce -31.0% | 34,971 | $4.1M |
| Gotham Asset Management | 0.01% | Add +275.7% | 34,564 | $4.0M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 33,358 | $3.9M |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -0.5% | 33,295 | $3.9M |
| Boston Partners | 0.00% | New | 31,696 | $3.7M |
| Occam Crest Management LP | 2.16% | New | 29,256 | $3.4M |
| Ameriprise Financial Inc. | 0.00% | Reduce -42.0% | 28,487 | $3.3M |
| Envestnet Asset Management Inc. | 0.00% | Add +0.6% | 28,046 | $3.3M |
| State of Wisconsin Investment Board | 0.01% | Reduce -1.8% | 25,252 | $2.9M |
| California Public Employees Retirement System | 0.00% | Reduce -46.5% | 25,000 | $2.9M |
| Stifel Financial Corp. | 0.00% | Add +31.7% | 24,925 | $2.9M |
| SG Americas Securities, LLC | 0.00% | Reduce -33.6% | 24,576 | $2.9M |
| State Board of Administration of Florida Retirement System | 0.01% | No change | 24,115 | $2.8M |
| Quantbot Technologies LP | 0.11% | Reduce -39.6% | 23,936 | $2.8M |
"% of holder's portfolio" is WLK's weight in each manager's 13F, not the share of Westlake Corp. the manager owns.