Westlake (WLK) Institutional Ownership

$70.77 -0.85 (-1.18%)

Closing price 09/11/2026 03:58 PM Eastern

Extended Trading

$70.80 +0.02 (+0.03%)

As of 09/11/2026 07:30 PM Eastern

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Current Institutional Ownership Percentage: 28.40%
Number of Institutional Buyers (last 12 months): 173
Total Institutional Inflows (last 12 months): $1.69B

Number of Institutional Sellers (last 12 months): 99
Total Institutional Outflows (last 12 months): $713.57M

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WLK Institutional Buying and Selling by Quarter

Westlake Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
9/9/2026	Core Capital Management & Research inc.	3,339	$264K	0.1%	N/A	0.003%
9/9/2026	Tidal Investments LLC	76,055	$5.55M	0.0%	+59.0%	0.060%
9/9/2026	Engineers Gate Manager LP	71,301	$5.21M	0.1%	+67.8%	0.056%
9/9/2026	IFP Advisors Inc	1,171	$85K	0.0%	+58,450.0%	0.001%
9/9/2026	Squarepoint Ops LLC	79,967	$5.84M	0.0%	+107.5%	0.063%
9/8/2026	Allworth Financial LP	3,054	$223K	0.0%	+79.5%	0.002%
9/8/2026	Arizona State Retirement System	8,836	$645K	0.0%	-16.5%	0.007%
9/8/2026	Nykredit A S	948	$69K	0.0%	N/A	0.001%
8/27/2026	Corient Private Wealth LP	8,143	$594K	0.0%	-76.7%	0.006%
8/24/2026	California State Teachers Retirement System	2,693,700	$196.64M	0.0%	+5,958.8%	2.108%
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8/23/2026	HB Wealth Management LLC	2,768	$202K	0.0%	N/A	0.002%
8/22/2026	AlphaGrep UK Ltd	12,289	$897K	0.3%	N/A	0.010%
8/21/2026	AXQ Capital LP	51,437	$3.76M	0.4%	N/A	0.040%
8/21/2026	Nykredit A S	948	$69K	0.0%	N/A	0.001%
8/20/2026	Two Sigma Securities LLC	6,190	$452K	0.0%	N/A	0.005%
8/19/2026	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	817,207	$59.66M	0.0%	-16.7%	0.639%
8/19/2026	Hsbc Holdings PLC	23,272	$1.70M	0.0%	N/A	0.018%
8/19/2026	Wellington Management Group LLP	141,816	$10.35M	0.0%	-92.1%	0.111%
8/18/2026	Kimelman & Baird LLC	1,500	$110K	0.0%	N/A	0.001%
8/18/2026	Public Employees Retirement System of Ohio	9,392	$686K	0.0%	N/A	0.007%
8/17/2026	Capstone Investment Advisors LLC	4,721	$345K	0.0%	N/A	0.004%
8/17/2026	Transamerica Financial Advisors LLC	1,095	$80K	0.0%	N/A	0.001%
8/17/2026	Corient Private Wealth LP	5,951	$434K	0.0%	N/A	0.005%
8/17/2026	Bank of America Corp DE	232,213	$16.95M	0.0%	N/A	0.182%
8/15/2026	Freestone Grove Partners LP	27,248	$1.99M	0.0%	N/A	0.021%
8/15/2026	Odyssean LLC	2,903	$212K	0.0%	N/A	0.002%
8/15/2026	Man Group plc	25,705	$1.88M	0.0%	N/A	0.020%
8/15/2026	Jupiter Topco LLC	267,748	$19.54M	0.0%	N/A	0.210%
8/14/2026	Hsbc Holdings PLC	23,272	$1.70M	0.0%	N/A	0.018%
8/14/2026	PDT Partners LLC	75,777	$5.53M	0.3%	N/A	0.059%
8/14/2026	Canada Pension Plan Investment Board	14,210	$1.04M	0.0%	N/A	0.011%
8/14/2026	Legal & General Group Plc	50,025	$3.65M	0.0%	N/A	0.039%
8/14/2026	The Manufacturers Life Insurance Company	37,155	$2.71M	0.0%	N/A	0.029%
8/14/2026	Thomist Capital Management LP	96,200	$7.02M	2.2%	N/A	0.075%
8/13/2026	Sanctuary Advisors LLC	4,985	$364K	0.0%	N/A	0.004%
8/13/2026	Meiji Yasuda Asset Management Co Ltd.	82,778	$6.04M	0.3%	N/A	0.065%
8/12/2026	Quantbot Technologies LP	15,303	$1.12M	0.0%	N/A	0.012%
8/12/2026	Farringdon Capital Ltd.	4,583	$335K	0.2%	N/A	0.004%
8/12/2026	Landscape Capital Management L.L.C.	3,072	$224K	0.0%	N/A	0.002%
8/12/2026	Ieq Capital LLC	6,267	$457K	0.0%	N/A	0.005%
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8/11/2026	Allworth Financial LP	3,054	$223K	0.0%	N/A	0.002%
8/10/2026	Robotti Robert	235,379	$17.18M	2.8%	N/A	0.184%
8/7/2026	BlackRock Inc.	3,294,162	$240.47M	0.0%	N/A	2.571%
8/7/2026	Deutsche Bank AG	2,169	$158K	0.0%	N/A	0.002%
8/7/2026	Mitsubishi UFJ Asset Management Co. Ltd.	16,907	$1.23M	0.0%	N/A	0.013%
8/6/2026	Alberta Investment Management Corp	89,200	$6.51M	0.0%	N/A	0.070%
8/6/2026	Bank of New York Mellon Corp	163,455	$11.93M	0.0%	N/A	0.128%
8/6/2026	Focus Partners Advisor Solutions LLC	3,912	$286K	0.0%	N/A	0.003%
8/6/2026	GSA Capital Partners LLP	6,310	$461K	0.0%	N/A	0.005%
8/3/2026	Walleye Capital LLC	82,847	$6.05M	0.0%	N/A	0.065%
7/10/2026	Handelsbanken Fonder AB	8,000	$584K	0.0%	-10.1%	0.006%
7/8/2026	Assenagon Asset Management S.A.	55,289	$4.04M	0.0%	N/A	0.043%
6/18/2026	Pacer Advisors Inc.	3,844	$449K	0.0%	-3.6%	0.003%
6/16/2026	Empowered Funds LLC	2,162	$253K	0.0%	-23.4%	0.002%
5/19/2026	Bank of America Corp DE	236,986	$27.69M	0.0%	+28.5%	0.185%
5/19/2026	Edgestream Partners L.P.	17,681	$2.07M	0.1%	+149.2%	0.014%
5/19/2026	Janus Henderson Group PLC	269,783	$31.52M	0.0%	-19.4%	0.211%
5/18/2026	Amundi	1,997	$233K	0.0%	N/A	0.002%
5/18/2026	California State Teachers Retirement System	44,459	$5.19M	0.0%	+23.2%	0.035%
5/18/2026	Royal Bank of Canada	103,951	$12.14M	0.0%	+21.9%	0.081%
5/18/2026	Recurrent Investment Advisors LLC	112,790	$13.18M	0.8%	+49.1%	0.088%
5/18/2026	Rokos Capital Management LLP	60,800	$7.10M	0.1%	N/A	0.047%
5/18/2026	Empowered Funds LLC	2,162	$253K	0.0%	-23.4%	0.002%
5/16/2026	The Manufacturers Life Insurance Company	33,295	$3.89M	0.0%	-0.5%	0.026%
5/16/2026	Quantinno Capital Management LP	121,444	$14.19M	0.0%	+4.4%	0.095%
5/16/2026	SummitTX Capital L.P.	14,335	$1.68M	0.1%	N/A	0.011%
5/14/2026	Gamco Investors INC. ET AL	3,491	$408K	0.0%	-11.4%	0.003%
5/14/2026	Public Employees Retirement System of Ohio	9,724	$1.14M	0.0%	-3.3%	0.008%
5/14/2026	Sei Investments Co.	12,769	$1.49M	0.0%	-55.1%	0.010%
5/13/2026	Cetera Investment Advisers	3,921	$458K	0.0%	+24.3%	0.003%
5/13/2026	First Trust Advisors LP	102,299	$11.95M	0.0%	-30.1%	0.080%
5/8/2026	PNC Financial Services Group Inc.	1,522	$178K	0.0%	+14.0%	0.001%
5/7/2026	Dimensional Fund Advisors LP	1,466,020	$171.26M	0.0%	-22.3%	1.145%
5/7/2026	Parallel Advisors LLC	830	$97K	0.0%	+133.8%	0.001%
5/7/2026	KBC Group NV	19,432	$2.27M	0.0%	-12.6%	0.015%
5/6/2026	California Public Employees Retirement System	25,000	$2.92M	0.0%	-46.5%	0.020%
5/6/2026	Allspring Global Investments Holdings LLC	285,434	$33.28M	0.1%	-43.7%	0.223%
5/5/2026	Bank of New York Mellon Corp	181,070	$21.15M	0.0%	+3.9%	0.141%
5/5/2026	Sanctuary Advisors LLC	3,272	$382K	0.0%	-4.9%	0.003%
5/5/2026	Maryland State Retirement & Pension System	1,915	$224K	0.0%	N/A	0.001%
5/4/2026	AMG National Trust Bank	23,041	$2.69M	0.1%	-1.2%	0.018%
5/4/2026	Archer Investment Corp	2,493	$291K	0.1%	N/A	0.002%
5/4/2026	State of Michigan Retirement System	8,000	$935K	0.0%	+1.3%	0.006%
5/4/2026	Principal Financial Group Inc.	74,481	$8.70M	0.0%	+3.9%	0.058%
5/4/2026	Teachers Retirement System of The State of Kentucky	178,160	$20.81M	0.2%	+7.8%	0.139%
5/1/2026	Fifth Third Bancorp	16,045	$1.87M	0.0%	+2,755.0%	0.013%
4/30/2026	Oregon Public Employees Retirement Fund	6,868	$802K	0.0%	+3.0%	0.005%
4/27/2026	New York State Teachers Retirement System	4,143	$484K	0.0%	-20.7%	0.003%
4/24/2026	Deprince Race & Zollo Inc.	203,366	$23.76M	0.4%	-0.4%	0.159%
4/23/2026	Inspire Investing LLC	2,836	$331K	0.0%	-35.6%	0.002%
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4/22/2026	Sterling Capital Management LLC	1,122	$131K	0.0%	-43.2%	0.001%
4/21/2026	Louisiana State Employees Retirement System	9,700	$1.13M	0.0%	N/A	0.008%
4/16/2026	SG Americas Securities LLC	24,576	$2.87M	0.0%	-33.6%	0.019%
4/16/2026	BI Asset Management Fondsmaeglerselskab A S	42,043	$4.91M	0.1%	+497.5%	0.033%
3/17/2026	Rockefeller Capital Management L.P.	955	$71K	0.0%	+219.4%	0.001%
3/9/2026	Corient Private Wealth LLC	50,715	$3.75M	0.0%	+53.6%	0.040%
2/24/2026	Pacer Advisors Inc.	3,988	$295K	0.0%	-33.6%	0.003%
2/19/2026	Invesco Ltd.	213,157	$15.76M	0.0%	+58.2%	0.166%
2/19/2026	Corient Private Wealth LLC	50,715	$3.75M	0.0%	+53.6%	0.040%
2/19/2026	Alberta Investment Management Corp	19,700	$1.46M	0.0%	N/A	0.015%

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), California State Teachers Retirement System ($196.64M), Dimensional Fund Advisors LP ($171.26M), FMR LLC ($164.94M), and Price T Rowe Associates Inc. MD ($163.31M).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), California State Teachers Retirement System ($2.69M), Capital World Investors ($2.17M), Norges Bank ($1.96M), Balyasny Asset Management L.P. ($1.27M), and Victory Capital Management Inc. ($1.16M).

Institutional investors have bought a total of 22,600,795 shares in the last 24 months. This purchase volume represents approximately $1.69B in transactions.

Of the 99 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 9,057,437 shares in the last 24 months. This volume of shares sold represents approximately $713.57M in transactions.

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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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Westlake (WLK) Institutional Ownership

WLK Institutional Buying and Selling by Quarter

Westlake Major Shareholders & Ownership History

WLK Institutional Ownership - Frequently Asked Questions

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Westlake (WLK) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Westlake (NYSE:WLK)

WLK Institutional Buying and Selling by Quarter

Westlake Major Shareholders & Ownership History

WLK Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of WLK shares?

What percentage of Westlake's stock is owned by institutional investors?

Which institutional investors have been buying Westlake's stock?

How much institutional buying is happening at Westlake?

Which of Westlake's major shareholders have been selling company stock?

How much institutional selling is happening at Westlake?

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