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 June 30, 2026. The institutional investors covered on this page collectively reported approximately $2.97B in WLK holdings during the latest filing period.
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 $227.53M, representing an estimated loss of -5.38% 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
344
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 | $227,527,769 | -$12,946,070 | -5.38% | |
| Capital World Investors | 0.02% | 2,842,348 | $207,491,404 | $196,320,976 | -$11,170,428 | -5.38% | |
| Price T Rowe Associates Inc | 0.02% | 2,206,676 | $161,088,000 | $152,415,111 | -$8,672,889 | -5.38% | |
| Orbis Allan Gray Ltd | 0.52% | 2,084,364 | $152,158,572 | $143,967,021 | -$8,191,551 | -5.38% | |
| Dimensional Fund Advisors Lp | 0.03% | 2,051,554 | $149,776,878 | $141,700,835 | -$8,076,043 | -5.39% | |
| Vanguard Portfolio Management Llc | 0.01% | 1,752,627 | $127,941,771 | $121,053,947 | -$6,887,824 | -5.38% | |
| Brandes Investment Partners, Lp | 0.80% | 1,572,939 | $114,825,469 | $108,642,897 | -$6,182,572 | -5.38% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.02% | 981,405 | $114,647,732 | $67,785,643 | -$46,862,089 | -40.87% | |
| Aqr Capital Management Llc | 0.04% | 1,570,453 | $114,643,088 | $108,471,189 | -$6,171,899 | -5.38% | |
| Vanguard Capital Management Llc | 0.00% | 1,464,223 | $106,888,279 | $101,133,883 | -$5,754,396 | -5.38% | |
| State Street Corp | 0.00% | 1,453,407 | $106,098,711 | $100,386,821 | -$5,711,890 | -5.38% | |
| Goldman Sachs Group Inc | 0.01% | 1,280,873 | $93,503,694 | $88,469,898 | -$5,033,796 | -5.38% | |
| Citadel Advisors Llc | 0.04% | 1,054,868 | $77,005,364 | $72,859,733 | -$4,145,631 | -5.38% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.09% | 1,023,403 | $74,710,927 | $70,686,445 | -$4,024,482 | -5.39% | |
| Geode Capital Management, Llc | 0.00% | 718,597 | $52,469,324 | $49,633,495 | -$2,835,829 | -5.40% | |
| Jacobs Levy Equity Management, Inc | 0.19% | 709,355 | $51,782,915 | $48,995,150 | -$2,787,765 | -5.38% | |
| Balyasny Asset Management L.P. | 0.08% | 625,859 | $45,687,707 | $43,228,081 | -$2,459,626 | -5.38% | |
| Woodline Partners Lp | 0.10% | 451,986 | $32,994,978 | $31,218,673 | -$1,776,305 | -5.38% | |
| Nuveen, Llc | 0.01% | 446,479 | $32,592,967 | $30,838,305 | -$1,754,662 | -5.38% | |
| Morgan Stanley | 0.00% | 437,571 | $31,942,742 | $30,223,029 | -$1,719,713 | -5.38% | |
| Janus Henderson Group Plc | 0.02% | 269,783 | $31,517,599 | $18,633,912 | -$12,883,687 | -40.88% | |
| Ubs Group Ag | 0.01% | 431,633 | $31,509,209 | $29,812,891 | -$1,696,318 | -5.38% | |
| Schroder Investment Management Group | 0.02% | 375,889 | $28,086,426 | $25,962,653 | -$2,123,773 | -7.56% | |
| Millennium Management Llc | 0.02% | 366,074 | $26,723,402 | $25,284,731 | -$1,438,671 | -5.38% | |
| Fmr Llc | 0.00% | 361,243 | $26,370,775 | $24,951,054 | -$1,419,721 | -5.38% | |
| Exoduspoint Capital Management, Lp | 0.22% | 327,195 | $23,885,235 | $22,599,359 | -$1,285,876 | -5.38% | |
| Qube Research & Technologies Ltd | 0.03% | 321,718 | $23,485,414 | $22,221,062 | -$1,264,352 | -5.38% | |
| Charles Schwab Investment Management Inc | 0.00% | 318,823 | $23,274,079 | $22,021,105 | -$1,252,974 | -5.38% | |
| Erste Asset Management Gmbh | 0.18% | 305,000 | $22,789,600 | $21,066,350 | -$1,723,250 | -7.56% | |
| Van Lanschot Kempen Investment Management N.V. | 0.15% | 268,434 | $19,595,682 | $18,540,736 | -$1,054,946 | -5.38% | |
| Northern Trust Corp | 0.00% | 262,926 | $19,193,598 | $18,160,299 | -$1,033,299 | -5.38% | |
| Robotti Robert | 2.77% | 235,379 | $17,182,667 | $16,257,628 | -$925,039 | -5.38% | |
| Bank Of America Corp | 0.00% | 232,213 | $16,951,549 | $16,038,952 | -$912,597 | -5.38% | |
| Susquehanna Portfolio Strategies, Llc | 0.27% | 230,396 | $16,818,908 | $15,913,452 | -$905,456 | -5.38% | |
| Proshare Advisors Llc | 0.02% | 228,319 | $16,667,287 | $15,769,993 | -$897,294 | -5.38% | |
| Norges Bank | 0.00% | 214,101 | $15,629,373 | $14,787,956 | -$841,417 | -5.38% | |
| Jump Financial, Llc | 0.14% | 209,861 | $15,319,853 | $14,495,099 | -$824,754 | -5.38% | |
| Vanguard Fiduciary Trust Co | 0.00% | 209,650 | $15,304,450 | $14,480,525 | -$823,925 | -5.38% | |
| D. E. Shaw & Co., Inc. | 0.01% | 200,534 | $14,638,982 | $13,850,883 | -$788,099 | -5.38% | |
| Russell Investments Group, Ltd. | 0.01% | 194,362 | $14,188,524 | $13,424,583 | -$763,941 | -5.38% | |
| Invesco Ltd. | 0.00% | 190,951 | $13,939,423 | $13,188,986 | -$750,437 | -5.38% | |
| Jpmorgan Chase & Co | 0.00% | 163,287 | $12,303,025 | $11,278,233 | -$1,024,792 | -8.33% | |
| Cerity Partners Llc | 0.01% | 166,436 | $12,149,844 | $11,495,735 | -$654,109 | -5.38% | |
| Bank Of New York Mellon Corp | 0.00% | 163,455 | $11,932,247 | $11,289,837 | -$642,410 | -5.38% | |
| Allspring Global Investments Holdings, Llc | 0.02% | 163,075 | $11,875,121 | $11,263,590 | -$611,531 | -5.15% | |
| Sprott Inc. | 0.39% | 160,110 | $11,688,030 | $11,058,798 | -$629,232 | -5.38% | |
| Teachers Retirement System Of The State Of Kentucky | 0.08% | 156,757 | $11,443,000 | $10,827,206 | -$615,794 | -5.38% | |
| Campbell & Co Investment Adviser Llc | 0.57% | 148,180 | $10,817,140 | $10,234,793 | -$582,347 | -5.38% | |
| Wellington Management Group Llp | 0.00% | 141,816 | $10,352,568 | $9,795,231 | -$557,337 | -5.38% | |
| Lighthouse Investment Partners, Llc | 0.31% | 135,361 | $9,881,392 | $9,349,384 | -$532,008 | -5.38% |
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.