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CIK 0001921865 · <br>Emerging growth company

ASP Isotopes Inc.

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Ticker
ASPI
Exchange
Nasdaq
Industry
Miscellaneous Chemical Products
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
872618235
Phone
202-756-2245
Business address
2200 ROSS AVENUE, SUITE 4575E, DALLAS, TX, 75201
Open-market buys, last 90 days
$61,800
in 2 filings
Open-market sales, last 90 days
$1,320,558
in 6 filings, $1.2M under 10b5-1 plans

Net −$1,258,758. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Mann Paul Elliot −$999K Chairman and CEO sold 3% of stake
  2. Ainscow Robert −$181K COO sold 2% of stake
  3. Ainscow Donald George −$92K EVP, Gen Counsel, Secretary sold 3% of stake
  4. Ryan Robert John Andrew +$62K Director 2 filings
  5. Kiessling Heather −$48K Chief Financial Officer sold 1% of stake
Date Insider Transaction Shares Price Value Owned after
2026-10-16 Kiessling Heather Chief Financial Officer Sale −21,830 $2.19 $48K 1,504,422
2026-07-01 Kiessling Heather Chief Financial Officer Sale 10b5-1 −23,124 $6.28 $145K 1,526,252
2026-05-28 Kiessling Heather Chief Financial Officer Grant or award +840,000 1,549,376
2026-04-15 Kiessling Heather Chief Financial Officer Sale 10b5-1 −23,124 $5.48 $127K 709,376
2025-12-18 Kiessling Heather Chief Financial Officer Sale −80,000 $5.80 $464K 732,500
2025-04-14 Kiessling Heather Chief Financial Officer Grant or award +400,000 812,500
2024-07-01 Kiessling Heather Chief Financial Officer Grant or award +400,000 412,500

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