WESTLAKE CORP (WLK) Institutional Shareholders
WESTLAKE CORP (WLK) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $4.85B in WLK holdings during the latest filing period.
Orbis Allan Gray Ltd is currently the largest disclosed institutional shareholder of WLK tracked by InsiderSet, reporting ownership valued at approximately $618.39M in its March 31, 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 $373.19M, representing an estimated loss of -39.65% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 57% of the total disclosed WLK value among the investors covered in this analysis. Major shareholders include Orbis Allan Gray Ltd, Capital World Investors, Blackrock, 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
331
Total Reported Value
$4.85B
Largest Holder
Orbis Allan Gray Ltd
Largest Position
$618.39M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
96
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Orbis Allan Gray Ltd | 2.61% | 5,293,519 | $618,388,890 | $373,193,090 | -$245,195,801 | -39.65% | |
| Capital World Investors | 0.07% | 4,211,006 | $491,929,721 | $296,875,923 | -$195,053,798 | -39.65% | |
| Blackrock, Inc. | 0.01% | 3,079,087 | $359,698,953 | $217,075,634 | -$142,623,320 | -39.65% | |
| Brandes Investment Partners, Lp | 1.52% | 1,842,650 | $215,259,803 | $129,906,825 | -$85,352,978 | -39.65% | |
| Wellington Management Group Llp | 0.04% | 1,793,517 | $209,518,656 | $126,442,949 | -$83,075,708 | -39.65% | |
| Vanguard Portfolio Management Llc | 0.01% | 1,769,808 | $206,748,971 | $124,771,464 | -$81,977,507 | -39.65% | |
| Dimensional Fund Advisors Lp | 0.04% | 1,466,020 | $171,262,546 | $103,354,410 | -$67,908,136 | -39.65% | |
| Vanguard Capital Management Llc | 0.00% | 1,455,594 | $170,042,491 | $102,619,377 | -$67,423,114 | -39.65% | |
| Goldman Sachs Group Inc | 0.02% | 1,393,327 | $162,768,410 | $98,229,554 | -$64,538,857 | -39.65% | |
| State Street Corp | 0.01% | 1,380,493 | $161,269,192 | $97,324,757 | -$63,944,436 | -39.65% | |
| Fmr Llc | 0.01% | 1,312,473 | $153,323,057 | $92,529,347 | -$60,793,711 | -39.65% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.02% | 981,405 | $114,647,732 | $69,189,053 | -$45,458,680 | -39.65% | |
| Storebrand Asset Management As | 0.04% | 979,841 | $111,064,302 | $69,078,791 | -$41,985,512 | -37.80% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.15% | 943,975 | $110,274,077 | $66,550,238 | -$43,723,840 | -39.65% | |
| Ubs Group Ag | 0.02% | 811,266 | $94,772,095 | $57,194,253 | -$37,577,842 | -39.65% | |
| Holocene Advisors, Lp | 0.21% | 730,035 | $85,282,689 | $51,467,468 | -$33,815,222 | -39.65% | |
| Citadel Advisors Llc | 0.06% | 715,586 | $83,594,756 | $50,448,813 | -$33,145,943 | -39.65% | |
| Geode Capital Management, Llc | 0.00% | 614,334 | $71,782,009 | $43,310,547 | -$28,471,462 | -39.66% | |
| Nuveen, Llc | 0.02% | 564,744 | $65,973,394 | $39,814,452 | -$26,158,942 | -39.65% | |
| Morgan Stanley | 0.00% | 486,508 | $56,834,106 | $34,298,814 | -$22,535,292 | -39.65% | |
| Schroder Investment Management Group | 0.04% | 374,508 | $43,442,928 | $26,402,814 | -$17,040,114 | -39.22% | |
| Balyasny Asset Management L.P. | 0.08% | 369,672 | $43,185,083 | $26,061,876 | -$17,123,207 | -39.65% | |
| Jacobs Levy Equity Management, Inc | 0.17% | 349,035 | $40,774,269 | $24,606,968 | -$16,167,302 | -39.65% | |
| Woodline Partners Lp | 0.15% | 337,075 | $39,377,102 | $23,763,788 | -$15,613,315 | -39.65% | |
| Charles Schwab Investment Management Inc | 0.01% | 311,762 | $36,420,037 | $21,979,221 | -$14,440,816 | -39.65% | |
| Proshare Advisors Llc | 0.05% | 295,811 | $34,556,641 | $20,854,676 | -$13,701,966 | -39.65% | |
| Allspring Global Investments Holdings, Llc | 0.06% | 285,434 | $33,275,896 | $20,123,097 | -$13,152,799 | -39.53% | |
| Janus Henderson Group Plc | 0.02% | 269,783 | $31,517,599 | $19,019,702 | -$12,497,898 | -39.65% | |
| Northern Trust Corp | 0.00% | 269,149 | $31,441,986 | $18,975,005 | -$12,466,982 | -39.65% | |
| Federated Hermes, Inc. | 0.05% | 266,651 | $31,150,170 | $18,798,896 | -$12,351,275 | -39.65% | |
| Aqr Capital Management Llc | 0.01% | 260,070 | $30,381,404 | $18,334,935 | -$12,046,469 | -39.65% | |
| Van Lanschot Kempen Investment Management N.V. | 0.25% | 244,308 | $28,540,061 | $17,223,714 | -$11,316,347 | -39.65% | |
| Bank Of America Corp | 0.00% | 236,986 | $27,684,705 | $16,707,513 | -$10,977,192 | -39.65% | |
| D. E. Shaw & Co., Inc. | 0.02% | 233,183 | $27,240,438 | $16,439,402 | -$10,801,037 | -39.65% | |
| Merewether Investment Management, Lp | 0.50% | 219,900 | $25,688,718 | $15,502,950 | -$10,185,768 | -39.65% | |
| Vanguard Fiduciary Trust Co | 0.01% | 205,684 | $24,028,005 | $14,500,722 | -$9,527,283 | -39.65% | |
| Deprince Race & Zollo Inc | 0.45% | 203,366 | $23,757,216 | $14,337,303 | -$9,419,913 | -39.65% | |
| Erste Asset Management Gmbh | 0.18% | 305,000 | $22,789,600 | $21,502,500 | -$1,287,100 | -5.65% | |
| Bank Of New York Mellon Corp | 0.00% | 181,070 | $21,152,645 | $12,765,435 | -$8,387,210 | -39.65% | |
| Invesco Ltd. | 0.00% | 179,402 | $20,957,742 | $12,647,841 | -$8,309,901 | -39.65% | |
| Ceredex Value Advisors Llc | 0.65% | 177,900 | $20,782,278 | $12,541,950 | -$8,240,328 | -39.65% | |
| Man Group Plc | 0.04% | 160,286 | $18,724,611 | $11,300,163 | -$7,424,448 | -39.65% | |
| Robotti Robert | 2.64% | 145,004 | $16,939,367 | $10,222,782 | -$6,716,585 | -39.65% | |
| Capstone Investment Advisors, Llc | 0.13% | 135,808 | $15,865,091 | $9,574,464 | -$6,290,627 | -39.65% | |
| Quantinno Capital Management Lp | 0.02% | 121,444 | $14,187,168 | $8,561,802 | -$5,625,366 | -39.65% | |
| Recurrent Investment Advisors Llc | 0.79% | 112,790 | $13,176,127 | $7,951,695 | -$5,224,432 | -39.65% | |
| Yaupon Capital Management Lp | 0.62% | 107,044 | $12,504,880 | $7,546,602 | -$4,958,278 | -39.65% | |
| Wells Fargo & Company/Mn | 0.00% | 106,705 | $12,465,313 | $7,522,703 | -$4,942,611 | -39.65% | |
| Jane Street Group, Llc | 0.01% | 105,686 | $12,346,238 | $7,450,863 | -$4,895,375 | -39.65% | |
| Royal Bank Of Canada | 0.00% | 103,951 | $12,144,000 | $7,328,546 | -$4,815,455 | -39.65% |
Frequently asked questions about WLK
Who owns the most WLK stock?
The largest holders of WLK are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for WESTLAKE CORP (WLK).
Is WLK widely held by superinvestors?
Many widely followed stocks like WLK appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly WLK is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.