Westlake WLK Institutional Ownership

NYSE WLK

$71.61 -0.17 (-0.24%)

As of: Sep 10, 2026 · 3:59 PM EDT

Institutions by Trading Activity

361 Institutions

Increased 198 54.8%

Unchanged 44 12.2%

Reduced 119 33.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

31.29%

▼-3.39 pp QoQ

Shares Held by Institutions

40.06Mn

of 128.04Mn outstanding

▼-4.82% QoQ

Shares Outstanding

128.04Mn

87.98Mn held outside 13F filers

Institutional Investors

361

filed 13F for Jun 2026

▲+25 vs prior quarter

Net Shares Added (QoQ)

-2.03Mn

distributed since last quarter

Value of Holdings

$3.00Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Westlake Corp (NYSE:WLK) has 361 institutional investors with active 13F positions as of June 2026.

Collectively, these holders controlled 31.3% of Westlake's outstanding shares in June 2026, down from 34.7% in March 2026.
Their total shares held in WLK decreased -4.82% quarter over quarter, and separately, investors owning Westlake increased 18.36% from a year ago.
Of these 361 funds, 198 grew their exposure to Westlake, 119 cut back, and 44 maintained positions.
In total, institutional investors held 40.06Mn shares in Westlake as of June 2026, down by 2.03Mn shares quarter on quarter, and up 345.33K shares year over year.
BlackRock, Inc. holds the largest position in WLK at 3.29Mn shares as of June 30, 2026, or 2.57% of shares outstanding.
The biggest buyers of Westlake for the quarter ending June 2026 included AQR CAPITAL MANAGEMENT LLC (1.31Mn), DIMENSIONAL FUND ADVISORS LP (585.53K), JACOBS LEVY EQUITY MANAGEMENT, INC (360.32K), CITADEL ADVISORS LLC (339.28K), ExodusPoint Capital Management, LP (327.2K).
The largest sales of WLK for the quarter ending June 2026 came from Orbis Allan Gray Ltd (3.21Mn), WELLINGTON MANAGEMENT GROUP LLP (1.65Mn), Capital World Investors (1.37Mn), FMR LLC (951.23K), UBS Group AG (379.63K).
According to Business Quant data, leading holders of WLK for June 2026 are BlackRock, Inc. (3.29Mn), Capital World Investors (2.84Mn), PRICE T ROWE ASSOCIATES INC /MD/ (2.21Mn), Orbis Allan Gray Ltd (2.08Mn), DIMENSIONAL FUND ADVISORS LP (2.05Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.75Mn), BRANDES INVESTMENT PARTNERS, LP (1.57Mn), AQR CAPITAL MANAGEMENT LLC (1.57Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.46Mn), State Street Corp (1.45Mn).

Form 13F Holdings

361 Institutional Holders

Report period 30 Jun, 2026

Total shares held 40.06Mn

Of outstanding 31.29%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	3,294,162	2.57%	▲215,075	+6.99%	$240.47Mn
2	Capital World Investors	0001422849	2,842,348	2.22%	▼1,368,658	-32.50%	$207.49Mn
3	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	2,206,676	1.72%	▼200,781	-8.34%	$161.09K
4	Orbis Allan Gray Ltd	0001663865	2,084,364	1.63%	▼3,209,155	-60.62%	$152.16Mn
5	DIMENSIONAL FUND ADVISORS LP	0000354204	2,051,554	1.60%	▲585,534	+39.94%	$149.78Mn
6	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,752,627	1.37%	▼17,181	-0.97%	$127.94Mn
7	BRANDES INVESTMENT PARTNERS, LP	0001015079	1,572,939	1.23%	▼269,711	-14.64%	$114.83Mn
8	AQR CAPITAL MANAGEMENT LLC	0001167557	1,570,453	1.23%	▲1,310,383	+503.86%	$114.64Mn
9	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,464,223	1.14%	▲8,629	+0.59%	$106.89Mn
10	State Street Corp	0000093751	1,453,407	1.14%	▲72,914	+5.28%	$106.10Mn
11	Goldman Sachs Group Inc	0000886982	1,280,873	1.00%	▼112,454	-8.07%	$93.50Mn
12	CITADEL ADVISORS LLC	0001423053	1,054,868	0.82%	▲339,282	+47.41%	$77.01Mn
13	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	0001705339	1,023,403	0.80%	▲79,428	+8.41%	$74.71Mn
14	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0000861177	817,207	0.64%	▼164,198	-16.73%	$59.66Mn
15	GEODE CAPITAL MANAGEMENT, LLC	0001214717	718,597	0.56%	▲104,263	+16.97%	$52.47Mn
16	JACOBS LEVY EQUITY MANAGEMENT, INC	0000884414	709,355	0.55%	▲360,320	+103.23%	$51.78Mn
17	BALYASNY ASSET MANAGEMENT L.P.	0001218710	625,859	0.49%	▲256,187	+69.30%	$45.69Mn
18	Woodline Partners LP	0001784547	451,986	0.35%	▲114,911	+34.09%	$32.99Mn
19	Nuveen, LLC	0001871926	446,479	0.35%	▼118,265	-20.94%	$32.59Mn
20	Morgan Stanley	0000895421	437,571	0.34%	▼48,937	-10.06%	$31.94Mn

Showing 1 to 20 of 361 holders