WESTLAKE CORPORATION (WLK)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
336
Reporting holders
$2.8B
Reported value
29.3%
Of shares outstanding
0.7%
Held as options
+24
Holder change
Institutions report 37,386,252 shares against 127,796,548 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $240.5M | 3,294,162 | 0.00% | 8q | +7.0%+$15.7M |
| Capital World Investors | $207.5M | 2,842,348 | 0.02% | 3q | -32.5%-$99.9M |
| Orbis Allan Gray Ltd | $152.2M | 2,084,364 | 0.52% | 4q | -60.6%-$234.3M |
| DIMENSIONAL FUND ADVISORS LP | $149.8M | 2,051,554 | 0.03% | 31q | +39.9%+$42.7M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $127.9M | 1,752,627 | 0.01% | 2q | -1.0%-$1.3M |
| BRANDES INVESTMENT PARTNERS, LP | $114.8M | 1,572,939 | 0.80% | 6q | -14.6%-$19.7M |
| AQR CAPITAL MANAGEMENT LLC | $114.6M | 1,570,453 | 0.04% | 31q | +503.9%+$95.7M |
| VANGUARD CAPITAL MANAGEMENT LLC | $106.9M | 1,464,223 | 0.00% | 2q | +0.6%+$629.9K |
| STATE STREET CORP | $106.1M | 1,453,407 | 0.00% | 31q | +5.3%+$5.3M |
| GOLDMAN SACHS GROUP INC | $93.5M | 1,280,873 | 0.01% | 31q | -8.1%-$8.2M |
| CITADEL ADVISORS LLC | $84.1M | 1,054,868 | 0.01% | 31q | +47.4%+$27.0M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $74.7M | 1,023,403 | 0.09% | 9q | +8.4%+$5.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $59.7M | 817,207 | 0.01% | 31q | -16.7%-$12.0M |
| GEODE CAPITAL MANAGEMENT, LLC | $52.5M | 718,597 | 0.00% | 31q | +17.0%+$7.6M |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $51.8M | 709,355 | 0.19% | 9q | +103.2%+$26.3M |
| Balyasny Asset Management L.P. | $45.7M | 625,859 | 0.06% | 2q | +69.3%+$18.7M |
| Woodline Partners LP | $33.0M | 451,986 | 0.10% | 5q | +34.1%+$8.4M |
| Nuveen, LLC | $32.6M | 446,479 | 0.01% | 6q | -20.9%-$8.6M |
| MORGAN STANLEY | $31.9M | 437,571 | 0.00% | 35q | -10.1%-$3.6M |
| UBS Group AG | $31.5M | 431,633 | 0.00% | 31q | -46.8%-$27.7M |
| SCHRODER INVESTMENT MANAGEMENT GROUP | $28.1M | 375,889 | 0.02% | 2q | HELD |
| MILLENNIUM MANAGEMENT LLC | $26.7M | 366,074 | 0.01% | 31q | +330.7%+$20.5M |
| FMR LLC | $26.4M | 361,243 | 0.00% | 31q | -72.5%-$69.4M |
| ExodusPoint Capital Management, LP | $23.9M | 327,195 | 0.15% | new | NEW |
| Qube Research & Technologies Ltd | $23.5M | 321,718 | 0.02% | new | NEW |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $23.3M | 318,823 | 0.00% | 31q | +2.3%+$515.5K |
| Sixth Street Partners Management Company, L.P. | $23.3M | 318,823 | 0.00% | new | NEW |
| Erste Asset Management GmbH | $22.8M | 305,000 | 0.18% | 27q | -22.8%-$6.7M |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | $19.6M | 268,434 | 0.15% | 5q | +9.9%+$1.8M |
| Jupiter Topco LLC | $19.5M | 267,748 | 0.01% | new | FIRST |
| NORTHERN TRUST CORP | $19.2M | 262,926 | 0.00% | 31q | -2.3%-$454.3K |
| ROBOTTI ROBERT | $17.2M | 235,379 | 2.77% | 31q | +62.3%+$6.6M |
| BANK OF AMERICA CORP /DE/ | $17.0M | 232,213 | 0.00% | 31q | -2.0%-$348.4K |
| Susquehanna Portfolio Strategies, LLC | $16.8M | 230,396 | 0.27% | 2q | +1154.1%+$15.5M |
| ProShare Advisors LLC | $16.7M | 228,319 | 0.02% | 15q | -22.8%-$4.9M |
| NORGES BANK | $15.6M | 214,101 | 0.00% | 32q | +18.1%+$2.4M |
| Jump Financial, LLC | $15.3M | 209,861 | 0.12% | new | NEW |
| VANGUARD FIDUCIARY TRUST CO | $15.3M | 209,650 | 0.00% | 2q | +1.9%+$289.5K |
| D. E. Shaw & Co., Inc. | $14.6M | 200,534 | 0.01% | 8q | -14.0%-$2.4M |
| Russell Investments Group, Ltd. | $14.2M | 194,362 | 0.01% | 31q | +117.5%+$7.7M |
| Invesco Ltd. | $13.9M | 190,951 | 0.00% | 31q | +6.4%+$843.1K |
| JPMORGAN CHASE & CO | $12.3M | 163,287 | 0.00% | 31q | +67.1%+$4.9M |
| Cerity Partners LLC | $12.1M | 166,436 | 0.01% | 11q | +129.0%+$6.8M |
| Bank of New York Mellon Corp | $11.9M | 163,455 | 0.00% | 31q | -9.7%-$1.3M |
| Allspring Global Investments Holdings, LLC | $11.9M | 163,075 | 0.02% | 19q | -42.9%-$8.9M |
| SPROTT INC. | $11.7M | 160,110 | 0.37% | 31q | +20.7%+$2.0M |
| Campbell & CO Investment Adviser LLC | $10.8M | 148,180 | 0.57% | new | NEW |
| WELLINGTON MANAGEMENT GROUP LLP | $10.4M | 141,816 | 0.00% | 4q | -92.1%-$120.6M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $10.1M | 26,155 | 0.00% | 31q | +74.4%+$4.3M |
| Lighthouse Investment Partners, LLC | $9.9M | 135,361 | 0.27% | new | NEW |
| Recurrent Investment Advisors LLC | $9.4M | 128,771 | 0.58% | 27q | +14.2%+$1.2M |
| Quantinno Capital Management LP | $9.0M | 123,228 | 0.01% | 27q | +1.5%+$130.2K |
| MARSHALL WACE, LLP | $8.1M | 111,574 | 0.01% | new | NEW |
| TUDOR INVESTMENT CORP ET AL | $8.1M | 110,710 | 0.01% | new | NEW |
| Assenagon Asset Management S.A. | $8.1M | 110,578 | 0.01% | new | NEW |
| WELLS FARGO & COMPANY/MN | $7.7M | 105,936 | 0.00% | 31q | -50.4%-$7.8M |
| ALLIANCEBERNSTEIN L.P. | $7.7M | 65,993 | 0.00% | 31q | -2.0%-$154.4K |
| MACKENZIE FINANCIAL CORP | $7.7M | 104,903 | 0.01% | 4q | +45.8%+$2.4M |
| ROYAL BANK OF CANADA | $7.1M | 96,772 | 0.00% | 31q | -6.9%-$524.1K |
| Thomist Capital Management, LP | $7.0M | 96,200 | 2.23% | 6q | +31.8%+$1.7M |
| BNP PARIBAS FINANCIAL MARKETS | $6.9M | 94,400 | 0.00% | 31q | +1311.1%+$6.4M |
| Point72 Asset Management, L.P. | $6.6M | 89,731 | 0.01% | new | NEW |
| Alberta Investment Management Corp | $6.5M | 89,200 | 0.04% | new | NEW |
| RHUMBLINE ADVISERS | $6.3M | 86,305 | 0.00% | 31q | -1.1%-$72.9K |
| Walleye Capital LLC | $6.0M | 82,847 | 0.02% | 10q | +38.5%+$1.7M |
| Meiji Yasuda Asset Management Co Ltd. | $6.0M | 82,778 | 0.27% | 2q | +4.2%+$240.9K |
| Squarepoint Ops LLC | $5.8M | 79,967 | 0.01% | 2q | +107.5%+$3.0M |
| NATIXIS | $5.6M | 77,117 | 0.02% | new | NEW |
| Tidal Investments LLC | $5.6M | 76,055 | 0.01% | 2q | +59.0%+$2.1M |
| PDT Partners, LLC | $5.5M | 75,777 | 0.29% | 4q | HELD |
| PRINCIPAL FINANCIAL GROUP INC | $5.5M | 75,653 | 0.00% | 22q | +1.6%+$85.6K |
| AGMAN CAPITAL LLC | $5.2M | 71,465 | 3.29% | 3q | -1.1%-$59.7K |
| Engineers Gate Manager LP | $5.2M | 71,301 | 0.07% | 3q | +67.8%+$2.1M |
| Swiss National Bank | $4.7M | 64,200 | 0.00% | 3q | -15.4%-$854.1K |
| Turas Capital Management LP | $4.3M | 58,800 | 1.97% | new | NEW |
| Merewether Investment Management, LP | $3.9M | 53,439 | 0.07% | 4q | -75.7%-$12.2M |
| MERCER GLOBAL ADVISORS INC /ADV | $3.9M | 52,954 | 0.00% | 30q | +826.3%+$3.4M |
| AXQ CAPITAL, LP | $3.8M | 51,437 | 0.41% | new | NEW |
| JANE STREET GROUP, LLC | $3.7M | 21,762 | 0.00% | 26q | -79.4%-$14.4M |
| Legal & General Group Plc | $3.7M | 50,025 | 0.00% | 31q | -1.4%-$52.0K |
| Mariner, LLC | $3.5M | 47,319 | 0.00% | new | NEW |
| TWO SIGMA INVESTMENTS, LP | $3.3M | 45,357 | 0.00% | new | NEW |
| NEW YORK STATE COMMON RETIREMENT FUND | $3.0M | 40,926 | 0.00% | 31q | -86.8%-$19.6M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $2.7M | 37,155 | 0.00% | 23q | +11.6%+$281.8K |
| CITIGROUP INC | $2.7M | 36,569 | 0.00% | 31q | -33.0%-$1.3M |
| STATE OF WISCONSIN INVESTMENT BOARD | $2.6M | 35,823 | 0.01% | 3q | +41.9%+$771.7K |
| OCCUDO QUANTITATIVE STRATEGIES LP | $2.6M | 35,695 | 0.14% | 10q | -19.7%-$637.7K |
| BANK OF MONTREAL /CAN/ | $2.6M | 35,590 | 0.00% | 15q | -8.8%-$251.7K |
| HITE Hedge Asset Management LLC | $2.5M | 34,589 | 0.14% | new | NEW |
| Retirement Systems of Alabama | $2.5M | 34,454 | 0.01% | 15q | -15.7%-$469.5K |
| Verition Fund Management LLC | $2.5M | 34,000 | 0.01% | 9q | +1600.0%+$2.3M |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $2.4M | 32,600 | 0.01% | 3q | +20664.3%+$2.4M |
| ABN AMRO INVESTMENT SOLUTIONS | $2.3M | 31,597 | 0.02% | new | NEW |
| AMERIPRISE FINANCIAL INC | $2.3M | 31,288 | 0.00% | 31q | -45.1%-$1.9M |
| WORLDQUANT MILLENNIUM ADVISORS LLC | $2.3M | 31,204 | 0.01% | 2q | +69.8%+$936.6K |
| VANGUARD ASSET MANAGEMENT, Ltd | $2.2M | 30,040 | 0.00% | 2q | -9.9%-$242.2K |
| ENVESTNET ASSET MANAGEMENT INC | $2.2M | 29,586 | 0.00% | 31q | +5.5%+$112.4K |
| FIRST TRUST ADVISORS LP | $2.0M | 27,496 | 0.00% | 31q | -73.1%-$5.5M |
| Freestone Grove Partners LP | $2.0M | 27,248 | 0.01% | new | NEW |
| BARCLAYS PLC | $1.9M | 26,524 | 0.00% | 31q | +83.5%+$881.0K |
Showing the largest 100 of 362 reported holders.
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 336 | $2.8B | 37,386,252 | 81 | 104 | 106 | 0.7% |
| Q1 2026 | 312 | $4.9B | 41,426,335 | 80 | 105 | 75 | 0.9% |
| Q4 2025 | 276 | $3.3B | 43,364,918 | 51 | 83 | 103 | 2.1% |
| Q3 2025 | 274 | $3.1B | 38,615,870 | 51 | 86 | 93 | 2.5% |
| Q2 2025 | 281 | $2.9B | 36,836,446 | 47 | 106 | 90 | 2.6% |
| Q1 2025 | 322 | $3.6B | 35,348,723 | 38 | 126 | 92 | 2.0% |
| Q4 2024 | 341 | $4.0B | 34,328,987 | 25 | 125 | 113 | 1.9% |
| Q3 2024 | 368 | $5.1B | 33,149,163 | 60 | 124 | 112 | 2.3% |
| Q2 2024 | 341 | $4.9B | 33,378,366 | 57 | 101 | 117 | 1.5% |
| Q1 2024 | 310 | $5.4B | 34,741,303 | 40 | 97 | 106 | 2.5% |
| Q4 2023 | 312 | $5.0B | 35,578,717 | 39 | 81 | 115 | 0.2% |
| Q3 2023 | 287 | $4.6B | 36,438,206 | 23 | 71 | 117 | 0.3% |
| Q2 2023 | 295 | $4.4B | 36,205,309 | 36 | 83 | 106 | 0.6% |
| Q1 2023 | 286 | $4.7B | 40,739,180 | 42 | 85 | 98 | 0.4% |
| Q4 2022 | 272 | $3.4B | 32,537,800 | 52 | 78 | 93 | 0.8% |
| Q3 2022 | 318 | $3.1B | 35,344,852 | 33 | 115 | 117 | 1.3% |
| Q2 2022 | 352 | $3.5B | 35,659,624 | 87 | 121 | 103 | 1.5% |
| Q1 2022 | 326 | $4.5B | 36,254,439 | 67 | 95 | 110 | 1.2% |
| Q4 2021 | 295 | $3.4B | 34,753,900 | 51 | 89 | 94 | 0.8% |
| Q3 2021 | 266 | $3.2B | 34,510,832 | 36 | 99 | 82 | 1.2% |
| Q2 2021 | 272 | $3.1B | 33,543,995 | 60 | 85 | 71 | 1.0% |
| Q1 2021 | 235 | $3.1B | 34,759,677 | 43 | 82 | 64 | 0.4% |
| Q4 2020 | 223 | $2.8B | 33,637,396 | 30 | 55 | 82 | 0.6% |
| Q3 2020 | 206 | $2.2B | 35,051,794 | 25 | 52 | 75 | 0.8% |
| Q2 2020 | 214 | $2.0B | 36,587,039 | 42 | 43 | 90 | 1.4% |
| Q1 2020 | 215 | $1.5B | 39,715,120 | 32 | 73 | 70 | 1.7% |
| Q4 2019 | 256 | $2.7B | 38,223,469 | 34 | 67 | 91 | 2.0% |
| Q3 2019 | 252 | $2.7B | 39,773,489 | 22 | 55 | 101 | 2.2% |
| Q2 2019 | 274 | $2.9B | 40,141,517 | 34 | 88 | 93 | 3.7% |
| Q1 2019 | 309 | $2.5B | 36,906,122 | 52 | 92 | 106 | 1.3% |
| Q4 2018 | 303 | $2.4B | 36,563,471 | 7 | 5 | 8 | 0.9% |