WLK Institutional Ownership & Shareholders
WESTLAKE CORP (WLK) is currently held by 347 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $2.97B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of WLK tracked by InsiderSet, reporting ownership valued at approximately $240.47M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $234.45M, representing an estimated loss of -2.51% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 50% of the total disclosed WLK value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Capital World Investors, Price T Rowe Associates Inc, and several other long-term asset managers with concentrated positions in WESTLAKE CORP (WLK).
This page ranks the largest institutional WLK shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
347
Total Reported Value
$2.97B
Largest Holder
Blackrock, Inc.
Largest Position
$240.47M
Insider Transactions (90d)
12
Latest Filing Quarter
Q2 2026
New Institutional Positions
65
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 3,294,162 | $240,473,839 | $234,445,510 | -$6,028,329 | -2.51% | |
| Capital World Investors | 0.02% | 2,842,348 | $207,491,404 | $202,289,907 | -$5,201,497 | -2.51% | |
| Price T Rowe Associates Inc | 0.02% | 2,206,676 | $161,088,000 | $157,049,131 | -$4,038,869 | -2.51% | |
| Orbis Allan Gray Ltd | 0.52% | 2,084,364 | $152,158,572 | $148,344,186 | -$3,814,386 | -2.51% | |
| Dimensional Fund Advisors Lp | 0.03% | 2,051,554 | $149,776,878 | $146,009,098 | -$3,767,780 | -2.52% | |
| Vanguard Portfolio Management Llc | 0.01% | 1,752,627 | $127,941,771 | $124,734,464 | -$3,207,307 | -2.51% | |
| Brandes Investment Partners, Lp | 0.80% | 1,572,939 | $114,825,469 | $111,946,069 | -$2,879,400 | -2.51% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.02% | 981,405 | $114,647,732 | $69,846,594 | -$44,801,138 | -39.08% | |
| Aqr Capital Management Llc | 0.04% | 1,570,453 | $114,643,088 | $111,769,140 | -$2,873,948 | -2.51% | |
| Vanguard Capital Management Llc | 0.00% | 1,464,223 | $106,888,279 | $104,208,751 | -$2,679,528 | -2.51% | |
| State Street Corp | 0.00% | 1,453,407 | $106,098,711 | $103,438,976 | -$2,659,735 | -2.51% | |
| Goldman Sachs Group Inc | 0.01% | 1,280,873 | $93,503,694 | $91,159,731 | -$2,343,963 | -2.51% | |
| Citadel Advisors Llc | 0.04% | 1,054,868 | $77,005,364 | $75,074,956 | -$1,930,408 | -2.51% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.09% | 1,023,403 | $74,710,927 | $72,835,592 | -$1,875,335 | -2.51% | |
| Geode Capital Management, Llc | 0.00% | 718,597 | $52,469,324 | $51,142,548 | -$1,326,776 | -2.53% | |
| Jacobs Levy Equity Management, Inc | 0.19% | 709,355 | $51,782,915 | $50,484,795 | -$1,298,120 | -2.51% | |
| Balyasny Asset Management L.P. | 0.08% | 625,859 | $45,687,707 | $44,542,385 | -$1,145,322 | -2.51% | |
| Woodline Partners Lp | 0.10% | 451,986 | $32,994,978 | $32,167,844 | -$827,134 | -2.51% | |
| Nuveen, Llc | 0.01% | 446,479 | $32,592,967 | $31,775,910 | -$817,057 | -2.51% | |
| Morgan Stanley | 0.00% | 437,571 | $31,942,742 | $31,141,928 | -$800,814 | -2.51% | |
| Janus Henderson Group Plc | 0.02% | 269,783 | $31,517,599 | $19,200,456 | -$12,317,143 | -39.08% | |
| Ubs Group Ag | 0.01% | 431,633 | $31,509,209 | $30,719,321 | -$789,888 | -2.51% | |
| Schroder Investment Management Group | 0.02% | 375,889 | $28,086,426 | $26,752,020 | -$1,334,406 | -4.75% | |
| Millennium Management Llc | 0.02% | 366,074 | $26,723,402 | $26,053,487 | -$669,915 | -2.51% | |
| Fmr Llc | 0.00% | 361,243 | $26,370,775 | $25,709,664 | -$661,111 | -2.51% | |
| Exoduspoint Capital Management, Lp | 0.22% | 327,195 | $23,885,235 | $23,286,468 | -$598,767 | -2.51% | |
| Qube Research & Technologies Ltd | 0.03% | 321,718 | $23,485,414 | $22,896,670 | -$588,744 | -2.51% | |
| Charles Schwab Investment Management Inc | 0.00% | 318,823 | $23,274,079 | $22,690,633 | -$583,446 | -2.51% | |
| Erste Asset Management Gmbh | 0.18% | 305,000 | $22,789,600 | $21,706,850 | -$1,082,750 | -4.75% | |
| Proshare Advisors Llc | 0.03% | 352,448 | $21,961,035 | $25,083,724 | +$3,122,689 | +14.22% | |
| Van Lanschot Kempen Investment Management N.V. | 0.15% | 268,434 | $19,595,682 | $19,104,448 | -$491,234 | -2.51% | |
| Northern Trust Corp | 0.00% | 262,926 | $19,193,598 | $18,712,443 | -$481,155 | -2.51% | |
| Robotti Robert | 2.77% | 235,379 | $17,182,667 | $16,751,923 | -$430,744 | -2.51% | |
| Bank Of America Corp | 0.00% | 232,213 | $16,951,549 | $16,526,599 | -$424,950 | -2.51% | |
| Susquehanna Portfolio Strategies, Llc | 0.27% | 230,396 | $16,818,908 | $16,397,283 | -$421,625 | -2.51% | |
| Norges Bank | 0.00% | 214,101 | $15,629,373 | $15,237,568 | -$391,805 | -2.51% | |
| Jump Financial, Llc | 0.14% | 209,861 | $15,319,853 | $14,935,807 | -$384,046 | -2.51% | |
| Vanguard Fiduciary Trust Co | 0.00% | 209,650 | $15,304,450 | $14,920,791 | -$383,660 | -2.51% | |
| D. E. Shaw & Co., Inc. | 0.01% | 200,534 | $14,638,982 | $14,272,005 | -$366,977 | -2.51% | |
| Russell Investments Group, Ltd. | 0.01% | 194,362 | $14,188,524 | $13,832,744 | -$355,780 | -2.51% | |
| Invesco Ltd. | 0.00% | 190,951 | $13,939,423 | $13,589,983 | -$349,440 | -2.51% | |
| Jpmorgan Chase & Co | 0.00% | 163,287 | $12,303,025 | $11,621,136 | -$681,889 | -5.54% | |
| Cerity Partners Llc | 0.01% | 166,436 | $12,149,844 | $11,845,250 | -$304,594 | -2.51% | |
| Bank Of New York Mellon Corp | 0.00% | 163,455 | $11,932,247 | $11,633,092 | -$299,155 | -2.51% | |
| Allspring Global Investments Holdings, Llc | 0.02% | 163,075 | $11,875,121 | $11,606,048 | -$269,073 | -2.27% | |
| Sprott Inc. | 0.39% | 160,110 | $11,688,030 | $11,395,029 | -$293,001 | -2.51% | |
| Teachers Retirement System Of The State Of Kentucky | 0.08% | 156,757 | $11,443,000 | $11,156,396 | -$286,604 | -2.50% | |
| Campbell & Co Investment Adviser Llc | 0.57% | 148,180 | $10,817,140 | $10,545,971 | -$271,169 | -2.51% | |
| Wellington Management Group Llp | 0.00% | 141,816 | $10,352,568 | $10,093,045 | -$259,523 | -2.51% | |
| Lighthouse Investment Partners, Llc | 0.31% | 135,361 | $9,881,392 | $9,633,642 | -$247,750 | -2.51% |
Frequently asked questions about WLK
Who are the largest institutional holders of WLK?
The largest institutional holders of WLK reported in the latest SEC Form 13F filings include Blackrock, Inc., Capital World Investors, Price T Rowe Associates Inc, Orbis Allan Gray Ltd, and Dimensional Fund Advisors Lp. InsiderSet ranks institutional holders by their latest reported WLK position.
What is WLK institutional ownership?
This page tracks WLK positions reported by institutional investment managers through SEC Form 13F. WESTLAKE CORP (WLK) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own WLK?
InsiderSet currently tracks 347 institutional managers reporting WLK holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of WLK shareholders.
How much WLK stock do institutions own?
Institutional investment managers disclosed approximately $2.97B in WLK holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was WLK institutional ownership last updated?
The latest WLK institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional WLK holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its WLK position after the reporting date.
Are institutions buying or selling WLK?
Institutional buying and selling can be analyzed by comparing WLK positions across consecutive 13F reporting periods. InsiderSet's WLK Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View WLK ownership changes.
How has WLK institutional ownership changed over time?
InsiderSet tracks WLK institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.