Company · Ownership research

ASP Isotopes Inc. ASPI

CIK 0001921865 · CUSIP 00218A105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 00218A105 (ASPI), not CUSIP 00218A905 (ASPI), CUSIP 00218A955 (ASPI), and does not merge CUSIPs.

This page lists the top 20 of 188 rows by value; the complete set is available through the API.

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	BlackRock, Inc. CIK 2012383 · View history	$57.33M 9,217,198 shares	0.00%	+889.05K(+10.70%)Added	SEC filing ↗ Aug 7, 2026	▾
02	Encompass Capital Advisors LLC CIK 1541901 · View history	$40.81M 6,561,754 shares	1.76%	-350.30K(-5.10%)Reduced	SEC filing ↗ Aug 14, 2026	▾
03	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · View history	$30.99M 4,982,953 shares	0.00%	-77.51K(-1.50%)Reduced	SEC filing ↗ Aug 13, 2026	▾
04	Rovida Investment Management Ltd CIK 2053064 · View history	$25.50M 4,100,000 shares	1.74%	0(0.00%)Unchanged	SEC filing ↗ Aug 5, 2026	▾
05	UBS Group AG CIK 1610520 · View history	$20.20M 3,247,633 shares	0.00%	+405.92K(+14.30%)Added	SEC filing ↗ Aug 13, 2026	▾
06	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$18.33M 2,945,901 shares	0.00%	+205.44K(+7.50%)Added	SEC filing ↗ Aug 12, 2026	▾
07	Alyeska Investment Group, L.P. CIK 1453072 · View history	$17.69M 2,843,503 shares	0.05%	+151.34K(+5.60%)Added	SEC filing ↗ Aug 14, 2026	▾
08	STATE STREET CORP CIK 93751 · Amended · View history	$16.14M 2,595,573 shares	0.00%	+273.41K(+11.80%)Added	SEC filing ↗ Sep 22, 2026	▾
09	EXCHANGE TRADED CONCEPTS, LLC CIK 1457320 · Amended · View history	$14.03M 2,255,509 shares	0.07%	+71.95K(+3.30%)Added	SEC filing ↗ Jul 22, 2026	▾
10	AWM Investment Company, Inc. CIK 1535264 · View history	$9.84M 1,581,490 shares	0.85%	-543.01K(-25.60%)Reduced	SEC filing ↗ Aug 14, 2026	▾
11	BNP PARIBAS ASSET MANAGEMENT Holding S.A. CIK 1520354 · View history	$9.81M 1,577,016 shares	0.01%	+689.77K(+77.70%)Added	SEC filing ↗ Aug 13, 2026	▾
12	Philadelphia Financial Management of San Francisco, LLC CIK 1351407 · View history	$8.35M 1,343,007 shares	2.29%	+694.67K(+107.10%)Added	SEC filing ↗ Aug 14, 2026	▾
13	MORGAN STANLEY CIK 895421 · View history	$7.23M 1,162,320 shares	0.00%	-414.09K(-26.30%)Reduced	SEC filing ↗ Aug 13, 2026	▾
14	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · View history	$6.94M 1,115,391 shares	0.00%	+138.22K(+14.10%)Added	SEC filing ↗ Aug 13, 2026	▾
15	NORTHERN TRUST CORP CIK 73124 · View history	$6.26M 1,007,214 shares	0.00%	+69.69K(+7.40%)Added	SEC filing ↗ Aug 13, 2026	▾
16	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$5.82M 935,352 shares	0.00%	+38.12K(+4.20%)Added	SEC filing ↗ Aug 14, 2026	▾
17	BARCLAYS PLC CIK 312069 · View history	$5.27M 847,781 shares	0.00%	-165.18K(-16.30%)Reduced	SEC filing ↗ Aug 14, 2026	▾
18	MARSHALL WACE, LLP CIK 1318757 · View history	$5.20M 835,656 shares	0.00%	+835.66KNew	SEC filing ↗ Aug 13, 2026	▾
19	Man Group plc CIK 1637460 · View history	$5.15M 828,377 shares	0.01%	+828.38KNew	SEC filing ↗ Aug 14, 2026	▾
20	VANGUARD FIDUCIARY TRUST CO CIK 933478 · View history	$4.90M 788,561 shares	0.00%	+35.24K(+4.70%)Added	SEC filing ↗ Aug 13, 2026	▾

Showing 20 / 188 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

188

Cancelled or null records excluded

Disclosed shares

65,427,972

Not deduplicated across managers

Disclosed value

$406.19M

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.

ASP Isotopes Inc. · Q2 2026

Explore all 188 reporting institutions.

This page includes 20 of 188 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.