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 52 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	BlackRock Inc. CIK 1364742 · View history	$6.55M 2,141,536 shares	0.00%	+2.06M(+2,512.60%)Added	SEC filing ↗ Aug 13, 2024	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$5.35M 1,749,120 shares	0.00%	+728.10K(+71.30%)Added	SEC filing ↗ Aug 13, 2024	▾
03	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.40M 783,587 shares	0.00%	+479.06K(+157.30%)Added	SEC filing ↗ Aug 9, 2024	▾
04	STATE STREET CORP CIK 93751 · View history	$2.32M 757,091 shares	0.00%	+640.99K(+552.10%)Added	SEC filing ↗ Aug 14, 2024	▾
05	MARSHALL WACE, LLP CIK 1318757 · View history	$1.67M 545,072 shares	0.00%	+433.73K(+389.60%)Added	SEC filing ↗ Aug 14, 2024	▾
06	GSA CAPITAL PARTNERS LLP CIK 1362033 · View history	$1.20M 393,268 shares	0.08%	+138.44K(+54.30%)Added	SEC filing ↗ Aug 15, 2024	▾
07	Philadelphia Financial Management of San Francisco, LLC CIK 1351407 · View history	$1.17M 383,970 shares	0.27%	+383.97KNew	SEC filing ↗ Aug 14, 2024	▾
08	Rovida Advisors Inc. CIK 1653857 · View history	$1.06M 350,000 shares	0.38%	+350.00KNew	SEC filing ↗ Aug 13, 2024	▾
09	Rathbones Group PLC CIK 1351991 · View history	$599.50K 195,915 shares	0.00%	+42.24K(+27.50%)Added	SEC filing ↗ Aug 9, 2024	▾
10	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$525.71K 171,800 shares	0.00%	+9.20K(+5.70%)Added	SEC filing ↗ Aug 9, 2024	▾
11	MORGAN STANLEY CIK 895421 · Amended · View history	$399.99K 130,717 shares	0.00%	+57.39K(+78.30%)Added	SEC filing ↗ May 14, 2025	▾
12	Bank of New York Mellon Corp CIK 1390777 · View history	$380.74K 124,426 shares	0.00%	+124.43KNew	SEC filing ↗ Jul 25, 2024	▾
13	JANE STREET GROUP, LLC CIK 1595888 · View history	$339.06K 110,803 shares	0.00%	-30.52K(-21.60%)Reduced	SEC filing ↗ Aug 15, 2024	▾
14	HTLF Bank CIK 2003343 · View history	$322.95K 105,538 shares	0.04%	+70.00K(+197.00%)Added	SEC filing ↗ Jul 23, 2024	▾
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · Amended · View history	$315.54K 103,119 shares	0.00%	+103.12KNew	SEC filing ↗ Aug 12, 2024	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$223.37K 72,996 shares	0.00%	+12.94K(+21.60%)Added	SEC filing ↗ Aug 14, 2024	▾
17	Virtu Financial LLC CIK 1533964 · View history	$202.00K 65,907 shares	0.01%	-17.77K(-21.20%)Reduced	SEC filing ↗ Aug 9, 2024	▾
18	Nuveen Asset Management, LLC CIK 1521019 · View history	$163.82K 53,535 shares	0.00%	+53.53KNew	SEC filing ↗ Aug 9, 2024	▾
19	UBS Group AG CIK 1610520 · View history	$159.09K 51,990 shares	0.00%	+51.99KNew	SEC filing ↗ Aug 14, 2024	▾
20	Qube Research & Technologies Ltd CIK 1729829 · View history	$128.83K 42,102 shares	0.00%	-65.86K(-61.00%)Reduced	SEC filing ↗ Aug 14, 2024	▾

Showing 20 / 52 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

8,795,396

Not deduplicated across managers

Disclosed value

$26.86M

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 2024

Explore all 52 reporting institutions.

This page includes 20 of 52 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.