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 32 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	VANGUARD GROUP INC CIK 102909 · View history	$4.22M 1,021,019 shares	0.00%	+844.71K(+479.10%)Added	SEC filing ↗ May 10, 2024	▾
02	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$1.47M 356,420 shares	0.00%	+294.73K(+477.70%)Added	SEC filing ↗ May 15, 2024	▾
03	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$1.26M 304,523 shares	0.00%	+34.68K(+12.90%)Added	SEC filing ↗ May 13, 2024	▾
04	GSA CAPITAL PARTNERS LLP CIK 1362033 · View history	$1.05M 254,823 shares	0.08%	-84.90K(-25.00%)Reduced	SEC filing ↗ May 3, 2024	▾
05	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$908.69K 220,021 shares	0.00%	+220.02KNew	SEC filing ↗ May 15, 2024	▾
06	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$672.00K 162,600 shares	0.00%	+87.83K(+117.50%)Added	SEC filing ↗ May 13, 2024	▾
07	Rathbones Group PLC CIK 1351991 · View history	$634.66K 153,672 shares	0.00%	+1.92K(+1.30%)Added	SEC filing ↗ May 14, 2024	▾
08	JANE STREET GROUP, LLC CIK 1595888 · View history	$583.68K 141,328 shares	0.00%	+141.33KNew	SEC filing ↗ May 16, 2024	▾
09	STATE STREET CORP CIK 93751 · View history	$479.49K 116,100 shares	0.00%	+103.80K(+843.90%)Added	SEC filing ↗ May 15, 2024	▾
10	HRT FINANCIAL LP CIK 1475597 · View history	$475.00K 115,230 shares	0.00%	+115.23KNew	SEC filing ↗ May 13, 2024	▾
11	MARSHALL WACE, LLP CIK 1318757 · View history	$459.82K 111,338 shares	0.00%	+111.34KNew	SEC filing ↗ May 15, 2024	▾
12	Qube Research & Technologies Ltd CIK 1729829 · View history	$445.88K 107,962 shares	0.00%	+107.96KNew	SEC filing ↗ May 14, 2024	▾
13	Virtu Financial LLC CIK 1533964 · View history	$346.00K 83,677 shares	0.03%	+69.18K(+477.00%)Added	SEC filing ↗ May 20, 2024	▾
14	BlackRock Inc. CIK 1364742 · View history	$338.53K 81,969 shares	0.00%	+78.94K(+2,607.00%)Added	SEC filing ↗ May 10, 2024	▾
15	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$320.70K 77,652 shares	0.00%	+77.60K(+149,230.80%)Added	SEC filing ↗ Dec 26, 2024	▾
16	MORGAN STANLEY CIK 895421 · Amended · View history	$302.84K 73,327 shares	0.00%	+73.33KNew	SEC filing ↗ Oct 17, 2024	▾
17	NORTHERN TRUST CORP CIK 73124 · View history	$248.02K 60,054 shares	0.00%	+36.83K(+158.60%)Added	SEC filing ↗ May 14, 2024	▾
18	CITADEL ADVISORS LLC CIK 1423053 · View history	$209.37K 50,695 shares	0.00%	-53.84K(-51.50%)Reduced	SEC filing ↗ May 15, 2024	▾
19	Schonfeld Strategic Advisors LLC CIK 1665241 · View history	$161.40K 39,079 shares	0.00%	+39.08KNew	SEC filing ↗ May 15, 2024	▾
20	Squarepoint Ops LLC CIK 1642575 · View history	$155.57K 37,669 shares	0.00%	+37.67KNew	SEC filing ↗ May 15, 2024	▾

Showing 20 / 32 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

3,771,847

Not deduplicated across managers

Disclosed value

$15.58M

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. · Q1 2024

Explore all 32 reporting institutions.

This page includes 20 of 32 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.