What does CUSIP 00218A105 represent in this 13F holders report?

CUSIP 00218A105 is the security identifier for ASPI - ASP Isotopes Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held ASPI - ASP Isotopes Inc. - Common Stock in Q1 2026?

98 institutional investors reported ASPI - ASP Isotopes Inc. - Common Stock for Q1 2026. Use the holders table for investor-level position and value details.

ASP Isotopes Inc. - Common Stock (ASPI)

CUSIP: 00218A105

Q1 2026 13F Holders as of 31 Mar 2026

Type / Class: Equity / Common Stock
Shares outstanding: 125,375,197
Total 13F shares: 28,452,842
Share change: +1,587,890
Total reported value: $126,098,342
Put/Call ratio: 49%
Price per share: $4.42
Number of holders: 98
Value change: +$5,734,204
Number of buys: 62
Number of sells: 34

Quarterly Holders Quick Answers

What is CUSIP 00218A105?
CUSIP 00218A105 identifies ASPI - ASP Isotopes Inc. - Common Stock in SEC institutional holdings data.

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Previous quarter: Q4 2025

Recent filing periods for CUSIP 00218A105:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of ASPI - ASP Isotopes Inc. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Mann Paul Elliot	13D/G 3/4/5	Executive Chairman	7%	7,759,538	$58,118,940	+$348,704	31 Dec 2025	13D/G 3/4/5
AK Jensen Investment Management Ltd	13D/G 3/4/5	10%+ Owner	5.4%	4,955,261	$47,669,611	+$2,373,350	30 Sep 2025	13D/G 3/4/5
BlackRock, Inc.	13D/G 13F	Company	6.6%	8,274,763	$36,574,452	+$19,091,638	31 Mar 2026	13D/G 13F
Encompass Capital Advisors LLC	13D/G	—	5.1%	6,413,362	$34,311,487	$0	16 Jan 2026	13D/G
VANGUARD GROUP INC	13F	Company	5.1%	6,406,244	$34,273,406	—	31 Dec 2025	13F
Alyeska Investment Group, L.P.	13F	Company	3.9%	4,895,546	$26,191,171	—	31 Dec 2025	13F
Rovida Investment Management Ltd	13F	Company	3.3%	4,100,000	$21,894,000	—	31 Dec 2025	13F
UBS Group AG	13F	Company	1.9%	2,406,457	$12,874,546	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.9%	2,384,066	$12,757,945	—	31 Dec 2025	13F
AWM Investment Company, Inc.	13F	Company	1.7%	2,124,496	$11,366,054	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	1.5%	1,844,405	$9,867,567	—	31 Dec 2025	13F
CITADEL ADVISORS LLC	13F	Company	1.4%	1,725,553	$9,231,709	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	1.4%	1,715,292	$9,176,813	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	1.4%	1,709,783	$9,147,339	—	31 Dec 2025	13F
JANE STREET GROUP, LLC	13F	Company	1.3%	1,586,961	$8,490,241	—	31 Dec 2025	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	1.2%	1,516,643	$8,114,040	—	31 Dec 2025	13F
EXCHANGE TRADED CONCEPTS, LLC	13F	Company	1.1%	1,400,314	$7,491,680	—	31 Dec 2025	13F
Hendrik Strydom	3/4/5	Director, 10%+ Owner	— class O/S missing	7,394,846	$7,099,052	—	15 Nov 2022	3/4/5
BNP Paribas Asset Management UK Ltd	13D/G	—	0.9%	944,326	$7,073,002	-$20,102,329	31 Dec 2025	13D/G
Duncan Moore	3/4/5	Director	0.83%	1,044,928	$5,438,850	-$756,829	12 Nov 2025	3/4/5
Donald George Ainscow	3/4/5	EVP, Gen Counsel, Secretary	0.4%	500,000	$5,380,000	—	01 Aug 2025	3/4/5
BNP Paribas Asset Management Holding S.A.	13F	Company	0.75%	944,326	$5,052,000	—	31 Dec 2025	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.71%	885,739	$4,738,704	—	31 Dec 2025	13F
Todd Wider	3/4/5	Director	0.62%	772,247	$4,571,702	-$648,823	18 Dec 2025	3/4/5
Telemark Asset Management, LLC	13F	Company	0.66%	825,000	$4,413,750	—	31 Dec 2025	13F
MARSHALL WACE, LLP	13F	Company	0.65%	818,129	$4,376,991	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.59%	745,909	$3,990,614	—	31 Dec 2025	13F
Diametric Capital, LP	13F	Company	0.59%	737,304	$3,944,576	—	31 Dec 2025	13F
Robert John Andrew Ryan	3/4/5	Director	0.52%	652,222	$3,861,154	—	18 Dec 2025	3/4/5
Sergey Vasnetsov	3/4/5	Director	— class O/S missing	3,838,607	$3,685,063	—	01 Mar 2023	3/4/5
Ph.D. Einar Ronander	3/4/5	Chief Scientific Adviser, 10%+ Owner	— class O/S missing	3,597,424	$3,453,527	—	09 Nov 2022	3/4/5
WIM INVESTMENT MANAGEMENT Ltd	13F	Company	0.48%	601,400	$3,217,490	—	31 Dec 2025	13F
Shay Capital LLC	13F	Company	0.46%	579,000	$3,097,650	—	31 Dec 2025	13F
BARCLAYS PLC	13F	Company	0.4%	506,788	$2,711,316	—	31 Dec 2025	13F
HITE Hedge Asset Management LLC	13F	Company	0.36%	449,883	$2,406,874	—	31 Dec 2025	13F
GROUP ONE TRADING LLC	13F	Company	0.35%	444,345	$2,377,246	—	31 Dec 2025	13F
Schonfeld Strategic Advisors LLC	13F	Company	0.33%	414,875	$2,219,580	—	31 Dec 2025	13F
Pacer Advisors, Inc.	13F	Company	0.32%	404,372	$2,163,390	—	31 Dec 2025	13F
Rathbones Group PLC	13F	Company	0.32%	399,599	$2,137,854	—	31 Dec 2025	13F
Quantbot Technologies LP	13F	Company	0.32%	396,599	$2,121,805	—	31 Dec 2025	13F
Saba Capital Management, L.P.	13F	Company	0.28%	356,377	$1,906,617	—	31 Dec 2025	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.28%	356,237	$1,905,868	—	31 Dec 2025	13F
GSA CAPITAL PARTNERS LLP	13F	Company	0.26%	329,488	$1,763,000	—	31 Dec 2025	13F
Caprock Group, LLC	13F	Company	0.26%	322,314	$1,724,380	—	31 Dec 2025	13F
IMC-Chicago, LLC	13F	Company	0.23%	294,502	$1,575,586	—	31 Dec 2025	13F
Burkehill Global Management, LP	13F	Company	0.2%	250,000	$1,337,500	—	31 Dec 2025	13F
Bank of New York Mellon Corp	13F	Company	0.19%	243,987	$1,305,333	—	31 Dec 2025	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.18%	230,856	$1,235,080	—	31 Dec 2025	13F
PRELUDE CAPITAL MANAGEMENT, LLC	13F	Company	0.18%	228,487	$1,222,405	—	31 Dec 2025	13F
Swiss National Bank	13F	Company	0.17%	210,100	$1,124,035	—	31 Dec 2025	13F

Institutional Holders of ASP Isotopes Inc. - Common Stock (ASPI) as of Q1 2026

As of 31 Mar 2026, ASP Isotopes Inc. - Common Stock (ASPI) was held by 98 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 28,452,842 shares. The largest 10 holders included BlackRock, Inc., VANGUARD CAPITAL MANAGEMENT LLC, UBS Group AG, EXCHANGE TRADED CONCEPTS, LLC, VANGUARD PORTFOLIO MANAGEMENT LLC, VANGUARD FIDUCIARY TRUST CO, JANE STREET GROUP, LLC, WIM INVESTMENT MANAGEMENT Ltd, GROUP ONE TRADING LLC, and Sara-Bay Financial. This page lists 98 institutional shareholders reporting positions in this security for the Q1 2026 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders

174

Q1 2026 holders

Holder diff

-76

Investor	Q4 2025 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q4 2025 Value $	Q1 2026 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.