Heather Kiessling Insider Trades & Stock Holdings

Chief Financial Officer · ASP Isotopes Inc. · Latest filing Oct 16, 2026

Heather Kiessling, Chief Financial Officer at ASP Isotopes Inc. has 2 Form 4 trades on file since Jul 1, 2026. Open-market activity: 0 purchases ($0) and 2 sales ($193.03K), net -$193.03K. Latest filing: disposed of 21.83K shares of $ASPI on Oct 16, 2026 at $2.19.

Trades on file

2

Open-market bought

$0

Open-market sold

$193.03K

Net open-market

-$193.03K

Shares held ($ASPI)

1.50M

Latest filing

Oct 16, 2026

Shares held by Heather Kiessling

• $ASPI1.50M sh

Shares owned after the most recent Form 4 for each company.

All insider trades by Heather Kiessling

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Oct 16, 2026	$ASPI	Sell (Open-market sale)	21.83K	$2.19	$47.81K	1.50M	-1.43%				Chief Financial Officer	SEC	Read
Jul 1, 2026	$ASPI	Sell (Open-market sale) 10b5-1	23.12K	$6.28	$145.22K	1.53M	-1.49%	-19.9%	-35.2%		Chief Financial Officer	SEC	—

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Heather Kiessling traded

• $ASPI

Frequently asked questions

Has Heather Kiessling been buying or selling stock?

Heather Kiessling has 0 open-market purchases and 2 open-market sales on file, net -$193.03K. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Heather Kiessling's latest insider trade?

disposed of 21.83K shares of $ASPI on Oct 16, 2026 at $2.19.

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.