Company · Ownership research

WESTLAKE CORP WLK

CIK 0001262823 · CUSIP 960413102

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 960413102 (WLK), not CUSIP 960413902 (WLK), CUSIP 960413952 (WLK), and does not merge CUSIPs.

This page lists the top 20 of 298 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Orbis Allan Gray Ltd CIK 1663865 · View history	$324.35M 4,386,635 shares	1.36%	+472.22K(+12.10%)Added	SEC filing ↗ Feb 17, 2026	▾
02	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$312.08M 4,220,717 shares	0.05%	+4.16M(+7,239.10%)Added	SEC filing ↗ Feb 17, 2026	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$289.65M 3,917,329 shares	0.00%	+477.70K(+13.90%)Added	SEC filing ↗ Jan 29, 2026	▾
04	BlackRock, Inc. CIK 2012383 · View history	$241.15M 3,261,433 shares	0.00%	+75.70K(+2.40%)Added	SEC filing ↗ Feb 12, 2026	▾
05	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$163.31M 2,208,715 shares	0.02%	+572(0.00%)Added	SEC filing ↗ Feb 17, 2026	▾
06	Capital World Investors CIK 1422849 · View history	$160.55M 2,171,324 shares	0.02%	+2.17MNew	SEC filing ↗ Feb 11, 2026	▾
07	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$139.43M 1,885,678 shares	0.03%	+585.44K(+45.00%)Added	SEC filing ↗ Feb 12, 2026	▾
08	BRANDES INVESTMENT PARTNERS, LP CIK 1015079 · View history	$123.50M 1,670,327 shares	0.94%	+121.63K(+7.90%)Added	SEC filing ↗ Feb 11, 2026	▾
09	STATE STREET CORP CIK 93751 · View history	$103.27M 1,396,633 shares	0.00%	+101.39K(+7.80%)Added	SEC filing ↗ Feb 13, 2026	▾
10	Holocene Advisors, LP CIK 1700574 · View history	$90.25M 1,220,622 shares	0.19%	+366.44K(+42.90%)Added	SEC filing ↗ Feb 17, 2026	▾
11	VICTORY CAPITAL MANAGEMENT INC CIK 1040188 · View history	$82.36M 1,113,819 shares	0.05%	-1.75M(-61.10%)Reduced	SEC filing ↗ Feb 13, 2026	▾
12	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC CIK 861177 · View history	$68.37M 924,704 shares	0.01%	+7.43K(+0.80%)Added	SEC filing ↗ Feb 13, 2026	▾
13	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. CIK 1705339 · View history	$64.84M 876,885 shares	0.10%	+20.91K(+2.40%)Added	SEC filing ↗ Feb 17, 2026	▾
14	MORGAN STANLEY CIK 895421 · Amended · View history	$56.17M 759,623 shares	0.00%	-56.01K(-6.90%)Reduced	SEC filing ↗ May 27, 2026	▾
15	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$55.75M 753,953 shares	0.01%	-297.44K(-28.30%)Reduced	SEC filing ↗ Mar 25, 2026	▾
16	JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history	$49.42M 668,405 shares	0.19%	-192.32K(-22.30%)Reduced	SEC filing ↗ Feb 13, 2026	▾
17	Nuveen, LLC CIK 1871926 · View history	$48.28M 652,909 shares	0.01%	-33.63K(-4.90%)Reduced	SEC filing ↗ Feb 12, 2026	▾
18	UBS Group AG CIK 1610520 · View history	$47.91M 648,012 shares	0.01%	+87.53K(+15.60%)Added	SEC filing ↗ Jan 29, 2026	▾
19	Woodline Partners LP CIK 1784547 · View history	$46.45M 628,159 shares	0.18%	+434.37K(+224.20%)Added	SEC filing ↗ Feb 17, 2026	▾
20	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$44.00M 594,922 shares	0.00%	-58.16K(-8.90%)Reduced	SEC filing ↗ Feb 9, 2026	▾

Showing 20 / 298 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

298

Cancelled or null records excluded

Disclosed shares

46,401,638

Not deduplicated across managers

Disclosed value

$3.43B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

WESTLAKE CORP · Q4 2025

Explore all 298 reporting institutions.

This page includes 20 of 298 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.