Westlake Corp (WLK) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

129,042,904Shares Outstanding

548,806Shares held by institutions

$53,684,203Value of institutional holdings

34.50%Institutional ownership %

22.77%Shares Changed QoQ

286No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Recent 13F filings as of December 2025 show that 286 institutional investors hold a position in Westlake Corp (NYSE:WLK).

These investors collectively held 34.5% of the company's total shares outstanding in December 2025, up from 32.2% in September 2025.
In percentage terms, this reflects as a holdings change of 22.77% quarter on quarter, and a decrease of 23.73% year over year.
Of these 286 institutional investors, 152 increased their holdings in Westlake, while 106 of them reduced positions, and 28 investors maintained their exposure.
The aggregate institutional position in Westlake now stands at 44.51Mn shares as of December 2025, after investors increased their holdings (up by 8.26Mn shares quarter on quarter which is up 9.27Mn shares year over year).
The top institutional stake in Westlake as of December 31, 2025 belongs to Orbis Allan Gray Ltd, which owns 4.39Mn shares, or 3.40% of the company.
Among the most significant buyers of Westlake during December 2025 were WELLINGTON MANAGEMENT GROUP LLP (4.16Mn), Capital World Investors (2.17Mn), DIMENSIONAL FUND ADVISORS LP (585.44K), VANGUARD GROUP INC (477.70K), Orbis Allan Gray Ltd (472.22K).
Leading sellers of Westlake stock in December 2025 included VICTORY CAPITAL MANAGEMENT INC (1.75Mn), CITADEL ADVISORS LLC (997.55K), GOLDMAN SACHS GROUP INC (297.44K), ROYAL BANK OF CANADA (296.32K), JACOBS LEVY EQUITY MANAGEMENT, INC (192.32K).
The top 10 institutional holders of Westlake for the quarter ending December 2025 included Orbis Allan Gray Ltd (4.39Mn), WELLINGTON MANAGEMENT GROUP LLP (4.22Mn), VANGUARD GROUP INC (3.92Mn), BlackRock, Inc. (3.26Mn), Capital World Investors (2.17Mn), DIMENSIONAL FUND ADVISORS LP (1.89Mn), BRANDES INVESTMENT PARTNERS, LP (1.67Mn), STATE STREET CORP (1.40Mn), Holocene Advisors, LP (1.22Mn), VICTORY CAPITAL MANAGEMENT INC (1.11Mn).

286 Institutional Holders

548,806 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Orbis Allan Gray Ltd	31 Dec, 2025	4,386,635	472,224	12.06%	$324,347,792.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	4,220,717	4,163,207	7,239.10%	$312,079,814.00
VANGUARD GROUP INC	31 Dec, 2025	3,917,329	477,698	13.89%	$289,647,306.00
BlackRock, Inc.	31 Dec, 2025	3,261,433	75,697	2.38%	$241,150,363.00
Capital World Investors	31 Dec, 2025	2,171,324	2,171,324	0.00%	$160,547,697.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	1,885,678	585,438	45.03%	$139,431,144.00
BRANDES INVESTMENT PARTNERS, LP	31 Dec, 2025	1,670,327	121,633	7.85%	$123,504,691.00
STATE STREET CORP	31 Dec, 2025	1,396,633	101,391	7.83%	$103,267,044.00
Holocene Advisors, LP	31 Dec, 2025	1,220,622	366,438	42.90%	$90,252,791.00
VICTORY CAPITAL MANAGEMENT INC	31 Dec, 2025	1,113,819	-1,752,541	-61.14%	$82,355,777.00
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	31 Dec, 2025	924,704	7,431	0.81%	$68,372,614.00
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	31 Dec, 2025	876,885	20,909	2.44%	$64,837,978.00
MORGAN STANLEY	31 Dec, 2025	759,623	-56,006	-6.87%	$56,166,568.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	753,953	-297,444	-28.29%	$55,747,280.00
JACOBS LEVY EQUITY MANAGEMENT, INC	31 Dec, 2025	668,405	-192,318	-22.34%	$49,421,866.00
Nuveen, LLC	31 Dec, 2025	652,909	-33,630	-4.90%	$48,276,092.00
UBS Group AG	31 Dec, 2025	648,012	87,532	15.62%	$47,914,008.00
Woodline Partners LP	31 Dec, 2025	628,159	434,373	224.15%	$46,446,076.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	594,922	-58,164	-8.91%	$43,997,447.00
JANE STREET GROUP, LLC	31 Dec, 2025	546,900	459,418	525.16%	$40,437,786.00

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