WESTLAKE CORP (WLK) Institutional Ownership Changes & 13F Activity

WESTLAKE CORP (WLK). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Wellington Management Group Llp, Fmr Llc, Victory Capital Management Inc, Orbis Allan Gray Ltd, and Goldman Sachs Group Inc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Pickering Energy Partners LpBuy+1,000—1,000$116.82KQ1 2026Jul 23, 2026
Wells Fargo & Company/MnBuy+14,826+16.1%106,705$12.47MQ1 2026Jul 08, 2026
Bank Of America CorpBuy+52,551+28.5%236,986$27.68MQ1 2026May 18, 2026
Edgestream Partners, L.P.Buy+10,586+149.2%17,681$2.07MQ1 2026May 18, 2026
California State Teachers Retirement SystemBuy+8,361+23.2%44,459$5.19MQ1 2026May 18, 2026
AmundiBuy+1,997—1,997$233.29KQ1 2026May 18, 2026
Wellington Management Group LlpSell-2,427,200-57.5%1,793,517$209.52MQ1 2026May 15, 2026
Fmr LlcBuy+1,083,630+473.5%1,312,473$153.32MQ1 2026May 15, 2026
Victory Capital Management IncSell-1,068,241-95.9%45,578$5.32MQ1 2026May 15, 2026
Orbis Allan Gray LtdBuy+906,884+20.7%5,293,519$618.39MQ1 2026May 15, 2026
Goldman Sachs Group IncBuy+639,374+84.8%1,393,327$162.77MQ1 2026May 15, 2026
Citadel Advisors LlcBuy+512,283+252.0%715,586$83.59MQ1 2026May 15, 2026
Holocene Advisors, LpSell-490,587-40.2%730,035$85.28MQ1 2026May 15, 2026
Balyasny Asset Management L.P.Buy+369,672—369,672$43.19MQ1 2026May 15, 2026
Millennium Management LlcSell-342,757-80.1%84,997$9.93MQ1 2026May 15, 2026
Jacobs Levy Equity Management, IncSell-319,370-47.8%349,035$40.77MQ1 2026May 15, 2026
Woodline Partners LpSell-291,084-46.3%337,075$39.38MQ1 2026May 15, 2026
Morgan StanleySell-273,115-36.0%486,508$56.83MQ1 2026May 15, 2026
D. E. Shaw & Co., Inc.Sell-253,098-52.0%233,183$27.24MQ1 2026May 15, 2026
Engineers Gate Manager LpSell-246,756-85.3%42,499$4.96MQ1 2026May 15, 2026
Aqr Capital Management LlcBuy+239,535+1166.5%260,070$30.38MQ1 2026May 15, 2026
Price T Rowe Associates IncBuy+198,742+9.0%2,407,457$281.24MQ1 2026May 15, 2026
Brandes Investment Partners, LpBuy+172,323+10.3%1,842,650$215.26MQ1 2026May 15, 2026
Merewether Investment Management, LpSell-168,200-43.3%219,900$25.69MQ1 2026May 15, 2026
Man Group PlcBuy+160,286—160,286$18.72MQ1 2026May 15, 2026
Capstone Investment Advisors, LlcBuy+132,689+4254.2%135,808$15.87MQ1 2026May 15, 2026
Yaupon Capital Management LpBuy+107,044—107,044$12.50MQ1 2026May 15, 2026
Mirae Asset Global Etfs Holdings Ltd.Buy+67,090+7.7%943,975$110.27MQ1 2026May 15, 2026
Janus Henderson Group PlcSell-64,810-19.4%269,783$31.52MQ1 2026May 15, 2026
Lloyd Harbor Capital Management, LlcBuy+62,000—62,000$7.24MQ1 2026May 15, 2026
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Frequently asked questions about WLK activity

  • Which institutional owners are buying WLK?

    Institutional owners buying WLK include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in WLK activity?

    "Buy" means an investor increased their reported position in WLK compared to the prior reporting period. This reflects growing exposure to WESTLAKE CORP (WLK) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in WLK increasing?

    Institutional interest in WLK can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.