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 362 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	VICTORY CAPITAL MANAGEMENT INC CIK 1040188 · View history	$390.12M 3,900,025 shares	0.40%	+586.18K(+17.70%)Added	SEC filing ↗ May 2, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$366.15M 3,660,406 shares	0.01%	+2.51K(+0.10%)Added	SEC filing ↗ May 2, 2025	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$355.14M 3,550,310 shares	0.01%	-327.66K(-8.40%)Reduced	SEC filing ↗ May 9, 2025	▾
04	STATE STREET CORP CIK 93751 · View history	$163.06M 1,630,106 shares	0.01%	+435.86K(+36.50%)Added	SEC filing ↗ May 15, 2025	▾
05	FMR LLC CIK 315066 · View history	$154.93M 1,548,866 shares	0.01%	+110.26K(+7.70%)Added	SEC filing ↗ May 12, 2025	▾
06	Capital World Investors CIK 1422849 · View history	$129.05M 1,290,128 shares	0.02%	+2.63K(+0.20%)Added	SEC filing ↗ May 12, 2025	▾
07	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$104.15M 1,041,190 shares	0.02%	+102.27K(+10.90%)Added	SEC filing ↗ May 16, 2025	▾
08	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$93.98M 939,669 shares	0.02%	+5.55K(+0.60%)Added	SEC filing ↗ May 13, 2025	▾
09	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$90.15M 901,229 shares	0.09%	+708.14K(+366.70%)Added	SEC filing ↗ May 15, 2025	▾
10	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. CIK 1705339 · View history	$85.41M 853,831 shares	0.18%	-28.64K(-3.20%)Reduced	SEC filing ↗ May 15, 2025	▾
11	CITADEL ADVISORS LLC CIK 1423053 · View history	$85.31M 852,856 shares	0.08%	+172.53K(+25.40%)Added	SEC filing ↗ May 15, 2025	▾
12	JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history	$77.60M 775,801 shares	0.31%	-23.45K(-2.90%)Reduced	SEC filing ↗ May 15, 2025	▾
13	Nuveen, LLC CIK 1871926 · View history	$72.97M 729,521 shares	0.02%	—	SEC filing ↗ May 12, 2025	▾
14	Ilex Capital Partners (UK) LLP CIK 1985486 · View history	$69.92M 699,007 shares	2.86%	+546.99K(+359.80%)Added	SEC filing ↗ May 15, 2025	▾
15	UBS Group AG CIK 1610520 · View history	$60.93M 609,078 shares	0.01%	+51.52K(+9.20%)Added	SEC filing ↗ May 13, 2025	▾
16	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$57.55M 576,779 shares	0.00%	+18.84K(+3.40%)Added	SEC filing ↗ May 13, 2025	▾
17	Allspring Global Investments Holdings, LLC CIK 1890906 · View history	$55.17M 551,766 shares	0.10%	+175.31K(+46.60%)Added	SEC filing ↗ Apr 24, 2025	▾
18	Balyasny Asset Management L.P. CIK 1218710 · View history	$52.20M 521,876 shares	0.13%	-471.27K(-47.50%)Reduced	SEC filing ↗ May 15, 2025	▾
19	BRANDES INVESTMENT PARTNERS, LP CIK 1015079 · View history	$42.11M 421,020 shares	0.43%	+421.02KNew	SEC filing ↗ May 15, 2025	▾
20	ExodusPoint Capital Management, LP CIK 1736225 · View history	$41.79M 417,760 shares	0.55%	+72.97K(+21.20%)Added	SEC filing ↗ May 14, 2025	▾

Showing 20 / 362 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

362

Cancelled or null records excluded

Disclosed shares

36,394,215

Not deduplicated across managers

Disclosed value

$3.64B

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 · Q1 2025

Explore all 362 reporting institutions.

This page includes 20 of 362 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.