ASP Isotopes Inc.

ASPI

Exchange: Nasdaq
Industry: Miscellaneous Chemical Products
SEC CIK: 0001921865

SEC filings (opens in a new tab)

In the last 90 days, ASP Isotopes Inc. insiders filed 0 open-market purchases and 8 sales; 185 institutions reported holding it in 13F filings for Q2 2026, worth $406.1M in total; no superinvestor holds it.

Q3 2025 vs. Q2 2025

How the institutions holding ASP Isotopes Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025 All holders in Q2 2025

13F holders of ASPI: Q2 2025 compared with Q3 2025
Measure	Q2 2025	Of which not filed for Q3 2025	Q3 2025	Change
Holders	130	1	157	+28
Shares	41.5M	10.5K	52.9M	+11.4M (+27.5%)
Value	$305.5M	$77.2K	$508.9M	+$203.5M (+66.6%)

1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (45)

Institutions that held ASP Isotopes Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to ASPI in Q3 2025
Institution	Shares	Value	% of portfolio
Jump Financial, LLC	940,500	$9.05M	0.11%
Sara-Bay Financial	903,103	$8.69M	2.43%
Squarepoint Ops LLC	624,807	$6.01M	0.01%
Encompass Capital Advisors LLC	500,000	$4.81M	0.22%
CAPROCK Group, Inc.	296,000	$2.75M	0.07%
Concentric Capital Strategies, LP	218,054	$2.10M	0.10%
Renaissance Technologies LLC	201,200	$1.94M	0.00%
Moore Capital Management, LP	200,000	$1.92M	0.04%
Schonfeld Strategic Advisors LLC	199,847	$1.92M	0.01%
Baird Financial Group, Inc.	192,308	$1.85M	0.00%
SPX Equities Gestao de Recursos Ltda	109,600	$1.05M	0.09%
Brevan Howard Capital Management LP	61,120	$588.0K	0.01%
HRT Financial LP	54,714	$526.0K	0.00%
Balyasny Asset Management LLC	42,888	$412.6K	0.00%
Jefferies Financial Group Inc.	39,526	$380.2K	0.00%
Canal Insurance CO	30,000	$289.0K	0.06%
Southport Management, L.L.C.	30,000	$288.6K	1.19%
Centiva Capital, LP	26,244	$252.5K	0.02%
Corsair Capital Management, L.P.	25,000	$240.5K	0.04%
Flow Traders U.S. LLC	23,703	$228.0K	0.01%
Point72 Asset Management, L.P.	23,371	$224.8K	0.00%
Pekin Hardy Strauss, Inc.	22,950	$220.8K	0.02%
GWM Advisors LLC	21,900	$210.7K	0.00%
Neuberger Berman Group LLC	21,763	$209.4K	0.00%
Sig Brokerage, LP	20,912	$201.2K	0.05%
DRW Securities, LLC	15,441	$148.5K	0.01%
Cresset Asset Management, LLC	13,606	$130.9K	0.00%
Cetera Investment Advisers	12,873	$123.8K	0.00%
Chicago Capital, LLC	12,000	$115.4K	0.00%
Cubist Systematic Strategies, LLC	10,512	$101.1K	0.00%
Evelyn Partners Investment Management LLP	10,000	$96.2K	0.00%
Once Capital Management, LLC	9,600	$92.4K	0.03%
Close Asset Management Ltd	7,500	$72.0K	0.00%
Quantbot Technologies LP	3,560	$34.2K	0.00%
Rockefeller Capital Management L.P.	3,121	$30.0K	0.00%
Clear Street Markets LLC	2,778	$26.7K	0.01%
Global Retirement Partners, LLC	1,000	$9.62K	0.00%
Optiver Holding B.V.	588	$5.66K	0.00%
Bryn Mawr Trust Co	220	$2.12K	0.00%
Armstrong Advisory Group, Inc	216	$2.08K	0.00%
SJS Investment Consulting Inc.	200	$1.92K	0.00%
SRS Capital Advisors, Inc.	120	$1.16K	0.00%
AdvisorNet Financial, Inc	120	$1.15K	0.00%
Islay Capital Management, LLC	39	$375	0.00%
Allworth Financial LP	5	$49	0.00%

Sold out (17)

Institutions that held ASP Isotopes Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of ASPI in Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
Options Solutions, LLC	175,138	$1.29M
Steward Partners Investment Advisory, LLC	81,700	$601.3K
Destination Wealth Management	56,964	$419.3K
Saranac Partners Ltd	44,195	$325.3K
Harbour Capital Advisors, LLC	33,025	$232.2K
Apis Capital Advisors, LLC	24,000	$176.6K
National Asset Management, Inc.	16,380	$120.6K
FORA Capital, LLC	14,569	$107.2K
GTS Securities LLC	11,311	$83.2K
Pale Fire Capital SE	10,300	$75.8K
Raymond James Financial Inc	1,697	$12.5K
MAI Capital Management	1,125	$8.28K
Activest Wealth Management	480	$3.53K
Ameritas Advisory Services, LLC	250	$1.84K
Federated Hermes, Inc.	129	$949
Skopos Labs, Inc.	82	$604
Rothschild Investment LLC	35	$258

Not filed for Q3 2025 yet (1)

Institutions that held ASP Isotopes Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ASPI in Q2 2025 that haven't filed for Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
Avantax Advisory Services, Inc.	10,493	$77.2K