ASP Isotopes Ownership & Insider Activity

ASP Isotopes (ASPI) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 11.4% of shares outstanding. Institutional investors hold 22.4%. Over the past 90 days, insiders made 2 purchases worth $62K and 4 sales worth $1.2M.

Shares Outstanding

153.309M

Shares Float

140.319M

Insider Shares Owned

17.511M

Insider % Owned

11.4%

Institutional Shares Held

34.318M

Institutional % Held

22.4%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

$62K total

Sales (90d)

$1.2M total

Net Activity

Net Selling

Net Value (90d)

-$1.2M

ASP Isotopes Insider Transactions (Last 6 Months)

See all insider trades →

Date	Insider	Title	Type	Shares	Price	Value
Sep 30, 2026	Andrew John Robert Ryan	—	BUY	15.000K	$2.68	$40K
Sep 28, 2026	Andrew John Robert Ryan	—	BUY	8.000K	$2.70	$22K
Sep 8, 2026	Donald Ainscow as attorney-in-fact	COO	SELL	8.438K	$4.29	$36K
Sep 2, 2026	Donald Ainscow	EVP, GEN COUNSEL, SECRETARY	SELL	23.678K	$3.89	$92K
Sep 2, 2026	Donald Ainscow as attorney-in-fact	COO	SELL	25.000K	$3.90	$98K
Sep 2, 2026	Elliot Paul Mann	CHAIRMAN AND CEO	SELL	251.275K	$3.98	$999K
Jul 1, 2026	Heather Kiessling	CHIEF FINANCIAL OFFICER	SELL	23.124K	$6.28	$145K
Jun 30, 2026	Donald Ainscow	EVP, GEN COUNSEL, SECRETARY	SELL	100.000K	$6.14	$614K
Jun 30, 2026	Michael Gorley	—	SELL	30.000K	$6.27	$188K
Jun 29, 2026	Todd Wider	—	SELL	100.000K	$6.18	$619K
Jun 8, 2026	Donald Ainscow as attorney-in-fact	COO	SELL	8.438K	$7.00	$59K
May 28, 2026	Elliot Paul Mann	CHAIRMAN AND CEO	GRANT	1.982M	$7.98	$2.0M
Apr 16, 2026	Donald Ainscow as attorney-in-fact	COO	SELL	22.500K	$5.21	$117K
Apr 15, 2026	Heather Kiessling	CHIEF FINANCIAL OFFICER	SELL	23.124K	$5.48	$127K

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ASP Isotopes Ownership & Insider Activity

ASP Isotopes Insider Transactions (Last 6 Months)

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