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Westlake (WLK) Institutional Ownership

Westlake logo
$63.39 +0.92 (+1.48%)
Closing price 10/2/2026 03:59 PM Eastern
Extended Trading
$63.52 +0.12 (+0.19%)
As of 10/2/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Westlake (NYSE:WLK)

Current
Institutional Ownership
Percentage
28.40%
Number of
Institutional Buyers
(last 12 months)
173
Total
Institutional Inflows
(last 12 months)
$1.50B
Number of
Institutional Sellers
(last 12 months)
98
Total
Institutional Outflows
(last 12 months)
$713.36M
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WLK Institutional Buying and Selling by Quarter

Westlake Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/9/2026Core Capital Management & Research inc.3,339$264K0.1%N/A0.003%
9/9/2026Tidal Investments LLC76,055$5.55M0.0%+59.0%0.060%
9/9/2026Engineers Gate Manager LP71,301$5.21M0.1%+67.8%0.056%
9/9/2026IFP Advisors Inc1,171$85K0.0%+58,450.0%0.001%
9/9/2026Squarepoint Ops LLC79,967$5.84M0.0%+107.5%0.063%
9/8/2026Allworth Financial LP3,054$223K0.0%+79.5%0.002%
9/8/2026Arizona State Retirement System8,836$645K0.0%-16.5%0.007%
9/8/2026Nykredit A S948$69K0.0%N/A0.001%
8/27/2026Corient Private Wealth LP8,143$594K0.0%-76.7%0.006%
8/23/2026HB Wealth Management LLC2,768$202K0.0%N/A0.002%
8/22/2026AlphaGrep UK Ltd12,289$897K0.3%N/A0.010%
8/21/2026AXQ Capital LP51,437$3.76M0.4%N/A0.040%
8/21/2026Nykredit A S948$69K0.0%N/A0.001%
8/20/2026Two Sigma Securities LLC6,190$452K0.0%N/A0.005%
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC817,207$59.66M0.0%-16.7%0.639%
8/19/2026Hsbc Holdings PLC23,272$1.70M0.0%N/A0.018%
8/19/2026Wellington Management Group LLP141,816$10.35M0.0%-92.1%0.111%
8/18/2026Kimelman & Baird LLC1,500$110K0.0%N/A0.001%
8/18/2026Public Employees Retirement System of Ohio9,392$686K0.0%N/A0.007%
8/17/2026Capstone Investment Advisors LLC4,721$345K0.0%N/A0.004%
8/17/2026Transamerica Financial Advisors LLC1,095$80K0.0%N/A0.001%
8/17/2026Corient Private Wealth LP5,951$434K0.0%N/A0.005%
8/17/2026Bank of America Corp DE232,213$16.95M0.0%N/A0.182%
8/15/2026Freestone Grove Partners LP27,248$1.99M0.0%N/A0.021%
8/15/2026Odyssean LLC2,903$212K0.0%N/A0.002%
8/15/2026Man Group plc25,705$1.88M0.0%N/A0.020%
8/15/2026Jupiter Topco LLC267,748$19.54M0.0%N/A0.210%
8/14/2026Hsbc Holdings PLC23,272$1.70M0.0%N/A0.018%
8/14/2026PDT Partners LLC75,777$5.53M0.3%N/A0.059%
8/14/2026Canada Pension Plan Investment Board14,210$1.04M0.0%N/A0.011%
8/14/2026Legal & General Group Plc50,025$3.65M0.0%N/A0.039%
8/14/2026The Manufacturers Life Insurance Company37,155$2.71M0.0%N/A0.029%
8/14/2026Thomist Capital Management LP96,200$7.02M2.2%N/A0.075%
8/13/2026Sanctuary Advisors LLC4,985$364K0.0%N/A0.004%
8/13/2026Meiji Yasuda Asset Management Co Ltd.82,778$6.04M0.3%N/A0.065%
8/12/2026Quantbot Technologies LP15,303$1.12M0.0%N/A0.012%
8/12/2026Farringdon Capital Ltd.4,583$335K0.2%N/A0.004%
8/12/2026Landscape Capital Management L.L.C.3,072$224K0.0%N/A0.002%
8/12/2026Ieq Capital LLC6,267$457K0.0%N/A0.005%
8/11/2026Allworth Financial LP3,054$223K0.0%N/A0.002%
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8/10/2026Robotti Robert235,379$17.18M2.8%N/A0.184%
8/7/2026BlackRock Inc.3,294,162$240.47M0.0%N/A2.571%
8/7/2026Deutsche Bank AG2,169$158K0.0%N/A0.002%
8/7/2026Mitsubishi UFJ Asset Management Co. Ltd.16,907$1.23M0.0%N/A0.013%
8/6/2026Alberta Investment Management Corp89,200$6.51M0.0%N/A0.070%
8/6/2026Bank of New York Mellon Corp163,455$11.93M0.0%N/A0.128%
8/6/2026Focus Partners Advisor Solutions LLC3,912$286K0.0%N/A0.003%
8/6/2026GSA Capital Partners LLP6,310$461K0.0%N/A0.005%
8/3/2026Walleye Capital LLC82,847$6.05M0.0%N/A0.065%
7/10/2026Handelsbanken Fonder AB8,000$584K0.0%-10.1%0.006%
7/8/2026Assenagon Asset Management S.A.55,289$4.04M0.0%N/A0.043%
6/18/2026Pacer Advisors Inc.3,844$449K0.0%-3.6%0.003%
6/16/2026Empowered Funds LLC2,162$253K0.0%-23.4%0.002%
5/19/2026Bank of America Corp DE236,986$27.69M0.0%+28.5%0.185%
5/19/2026Edgestream Partners L.P.17,681$2.07M0.1%+149.2%0.014%
5/19/2026Janus Henderson Group PLC269,783$31.52M0.0%-19.4%0.211%
5/18/2026Amundi1,997$233K0.0%N/A0.002%
5/18/2026California State Teachers Retirement System44,459$5.19M0.0%+23.2%0.035%
5/18/2026Royal Bank of Canada103,951$12.14M0.0%+21.9%0.081%
5/18/2026Recurrent Investment Advisors LLC112,790$13.18M0.8%+49.1%0.088%
5/18/2026Rokos Capital Management LLP60,800$7.10M0.1%N/A0.047%
5/18/2026Empowered Funds LLC2,162$253K0.0%-23.4%0.002%
5/16/2026The Manufacturers Life Insurance Company33,295$3.89M0.0%-0.5%0.026%
5/16/2026Quantinno Capital Management LP121,444$14.19M0.0%+4.4%0.095%
5/16/2026SummitTX Capital L.P.14,335$1.68M0.1%N/A0.011%
5/14/2026Gamco Investors INC. ET AL3,491$408K0.0%-11.4%0.003%
5/14/2026Public Employees Retirement System of Ohio9,724$1.14M0.0%-3.3%0.008%
5/14/2026Sei Investments Co.12,769$1.49M0.0%-55.1%0.010%
5/13/2026Cetera Investment Advisers3,921$458K0.0%+24.3%0.003%
5/13/2026First Trust Advisors LP102,299$11.95M0.0%-30.1%0.080%
5/8/2026PNC Financial Services Group Inc.1,522$178K0.0%+14.0%0.001%
5/7/2026Dimensional Fund Advisors LP1,466,020$171.26M0.0%-22.3%1.145%
5/7/2026Parallel Advisors LLC830$97K0.0%+133.8%0.001%
5/7/2026KBC Group NV19,432$2.27M0.0%-12.6%0.015%
5/6/2026California Public Employees Retirement System25,000$2.92M0.0%-46.5%0.020%
5/6/2026Allspring Global Investments Holdings LLC285,434$33.28M0.1%-43.7%0.223%
5/5/2026Bank of New York Mellon Corp181,070$21.15M0.0%+3.9%0.141%
5/5/2026Sanctuary Advisors LLC3,272$382K0.0%-4.9%0.003%
5/5/2026Maryland State Retirement & Pension System1,915$224K0.0%N/A0.001%
5/4/2026AMG National Trust Bank23,041$2.69M0.1%-1.2%0.018%
5/4/2026Archer Investment Corp2,493$291K0.1%N/A0.002%
5/4/2026State of Michigan Retirement System8,000$935K0.0%+1.3%0.006%
5/4/2026Principal Financial Group Inc.74,481$8.70M0.0%+3.9%0.058%
5/4/2026Teachers Retirement System of The State of Kentucky178,160$20.81M0.2%+7.8%0.139%
5/1/2026Fifth Third Bancorp16,045$1.87M0.0%+2,755.0%0.013%
4/30/2026Oregon Public Employees Retirement Fund6,868$802K0.0%+3.0%0.005%
4/27/2026New York State Teachers Retirement System4,143$484K0.0%-20.7%0.003%
4/24/2026Deprince Race & Zollo Inc.203,366$23.76M0.4%-0.4%0.159%
4/23/2026Inspire Investing LLC2,836$331K0.0%-35.6%0.002%
4/22/2026Sterling Capital Management LLC1,122$131K0.0%-43.2%0.001%
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4/21/2026Louisiana State Employees Retirement System9,700$1.13M0.0%N/A0.008%
4/16/2026SG Americas Securities LLC24,576$2.87M0.0%-33.6%0.019%
4/16/2026BI Asset Management Fondsmaeglerselskab A S42,043$4.91M0.1%+497.5%0.033%
3/17/2026Rockefeller Capital Management L.P.955$71K0.0%+219.4%0.001%
3/9/2026Corient Private Wealth LLC50,715$3.75M0.0%+53.6%0.040%
2/24/2026Pacer Advisors Inc.3,988$295K0.0%-33.6%0.003%
2/19/2026Invesco Ltd.213,157$15.76M0.0%+58.2%0.166%
2/19/2026Corient Private Wealth LLC50,715$3.75M0.0%+53.6%0.040%
2/19/2026Alberta Investment Management Corp19,700$1.46M0.0%N/A0.015%
2/18/2026Alpine Woods Capital Investors LLC8,989$665K0.2%N/A0.007%


WLK Institutional Ownership - Frequently Asked Questions

During the previous two years, 390 institutional investors and hedge funds held shares of Westlake. The most heavily invested institutionals were Orbis Allan Gray Ltd ($324.35M), Vanguard Group Inc. ($289.65M), BlackRock Inc. ($240.47M), Dimensional Fund Advisors LP ($171.26M), FMR LLC ($164.94M), Price T Rowe Associates Inc. MD ($163.31M), and Capital World Investors ($160.55M).Learn more on Westlake's institutional investors.

28.40% of Westlake's stock is owned by institutional investors. Learn more on WLK's institutional investor holdings.

Of the 332 institutional investors that purchased Westlake's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Wellington Management Group LLP ($4.17M), BlackRock Inc. ($3.29M), Capital World Investors ($2.17M), Norges Bank ($1.96M), Balyasny Asset Management L.P. ($1.27M), Victory Capital Management Inc. ($1.16M), and Brandes Investment Partners LP ($1.16M).

Institutional investors have bought a total of 19,951,554 shares in the last 24 months. This purchase volume represents approximately $1.50B in transactions.

Of the 98 institutional investors that sold Westlake's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Victory Capital Management Inc. ($2.61M), Wellington Management Group LLP ($1.65M), Millennium Management LLC ($683.53K), Dimensional Fund Advisors LP ($419.66K), ANTIPODES PARTNERS Ltd ($406.65K), Jacobs Levy Equity Management Inc. ($316.85K), and Goldman Sachs Group Inc. ($297.44K).

Institutional investors have sold a total of 9,054,718 shares in the last 24 months. This volume of shares sold represents approximately $713.36M in transactions.


Related Companies

Institutional ownership data for NYSE:WLK is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/9/2026. New 13F filings are added each quarter as they're published.
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