ASP Isotopes Ownership & Insider Activity

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

Insiders own 14.1% of shares outstanding. Institutional investors hold 25.0%. Over the past 90 days, insiders made 5 sales worth $1.6M.

Shares Outstanding

153.309M

Shares Float

140.319M

Insider Shares Owned

17.796M

Insider % Owned

14.1%

Institutional Shares Held

31.440M

Institutional % Held

25.0%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$1.6M total

Net Activity

Net Selling

Net Value (90d)

-$1.6M

ASP Isotopes Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
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
Mar 6, 2026	Donald Ainscow as attorney-in-fact	COO	SELL	25.000K	$4.51	$113K
Mar 6, 2026	Donald Ainscow as attorney-in-fact	COO	SELL	8.438K	$5.44	$46K
Mar 2, 2026	Elliot Paul Mann	EXECUTIVE CHAIRMAN	s	162.153K	$5.44	$881K