Westlake WLK Institutional Ownership

NYSE WLK

$62.34 -1.06 (-1.67%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

362 Institutions

Increased 199 55.0%

Unchanged 44 12.2%

Reduced 119 32.9%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

31.29%

▼-3.17 pp QoQ

Shares Held by Institutions

40.07Mn

of 128.04Mn outstanding

▼-4.79% QoQ

Shares Outstanding

128.04Mn

87.97Mn held outside 13F filers

Institutional Investors

362

filed 13F for Jun 2026

▲+26 vs prior quarter

Net Shares Added (QoQ)

-2.02Mn

distributed since last quarter

Value of Holdings

$2.50Bn

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) appears in 362 institutional 13F filings for the quarter ending June 2026.

These investors held 31.3% of outstanding shares in June 2026, down from 34.5% in March 2026.
Their total shares held in WLK decreased -4.79% quarter over quarter, and separately, investors owning Westlake increased 18.69% from a year ago.
Activity in WLK broke down as 199 buyers, 119 sellers, and 44 unchanged among 362 total holders.
Institutional investors collectively held 40.07Mn shares in Westlake as of June 2026, down by 2.02Mn shares quarter on quarter, and up 1.13Mn shares year over year.
BlackRock, Inc. leads ownership in WLK with 3.29Mn shares as of June 30, 2026, equal to 2.57% of outstanding shares.
The largest buyers of Westlake for the quarter ending June 2026 were 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).
Top sellers of WLK stock for the quarter ending June 2026 included 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).
Westlake's 10 largest shareholders as of June 2026 include 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) per Business Quant data.

Form 13F Holdings

362 Institutional Holders

Report period 30 Jun, 2026

Total shares held 40.07Mn

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 362 holders