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 (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Orbis Allan Gray Ltd, Wellington Management Group Llp, Aqr Capital Management Llc, Jacobs Levy Equity Management, Inc, and Citadel Advisors Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+3,860+11.6%37,155$2.71MQ2 2026Sep 09, 2026
Integrated Wealth Concepts LlcBuy+100+3.5%2,956$215.79KQ2 2026Sep 09, 2026
Citadel Advisors LlcBuy+339,282+47.4%1,054,868$77.01MQ2 2026Sep 02, 2026
Corient Private Wealth LlcSell-26,828-76.7%8,143$594.44KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemSell-7,559-17.0%36,900$2.69MQ2 2026Aug 24, 2026
First Eagle U.S. ValueSell-4,283-60.2%2,835$206.96KQ2 2026Aug 24, 2026
Assenagon Asset Management S.A.Buy+55,28955,289$4.04MQ2 2026Aug 21, 2026
Mercer Global Advisors IncBuy+20,760+363.1%26,477$1.93MQ2 2026Aug 19, 2026
Capstone Investment Advisors, LlcSell-131,087-96.5%4,721$344.63KQ2 2026Aug 17, 2026
Public Employees Retirement System Of OhioSell-332-3.4%9,392$685.62KQ2 2026Aug 17, 2026
Transamerica Financial Advisors, LlcSell-205-15.8%1,095$79.99KQ2 2026Aug 17, 2026
Orbis Allan Gray LtdSell-3,209,155-60.6%2,084,364$152.16MQ2 2026Aug 14, 2026
Wellington Management Group LlpSell-1,651,701-92.1%141,816$10.35MQ2 2026Aug 14, 2026
Aqr Capital Management LlcBuy+1,310,383+503.9%1,570,453$114.64MQ2 2026Aug 14, 2026
Jacobs Levy Equity Management, IncBuy+360,320+103.2%709,355$51.78MQ2 2026Aug 14, 2026
Exoduspoint Capital Management, LpBuy+327,195327,195$23.89MQ2 2026Aug 14, 2026
Qube Research & Technologies LtdBuy+321,718321,718$23.49MQ2 2026Aug 14, 2026
Millennium Management LlcBuy+281,077+330.7%366,074$26.72MQ2 2026Aug 14, 2026
Brandes Investment Partners, LpSell-269,711-14.6%1,572,939$114.83MQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Buy+256,187+69.3%625,859$45.69MQ2 2026Aug 14, 2026
Susquehanna Portfolio Strategies, LlcBuy+212,024+1154.1%230,396$16.82MQ2 2026Aug 14, 2026
Price T Rowe Associates IncSell-200,781-8.3%2,206,676$161.09MQ2 2026Aug 14, 2026
Invesco Ltd.Buy+190,951190,951$13.94MQ2 2026Aug 14, 2026
Merewether Investment Management, LpSell-166,461-75.7%53,439$3.90MQ2 2026Aug 14, 2026
Lighthouse Investment Partners, LlcBuy+135,361135,361$9.88MQ2 2026Aug 14, 2026
Man Group PlcSell-134,581-84.0%25,705$1.88MQ2 2026Aug 14, 2026
Hrt Financial LpBuy+116,395116,395$8.50MQ2 2026Aug 14, 2026
Woodline Partners LpBuy+114,911+34.1%451,986$32.99MQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-112,454-8.1%1,280,873$93.50MQ2 2026Aug 14, 2026
Tudor Investment Corp Et AlBuy+110,710110,710$8.08MQ2 2026Aug 14, 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.