X0508 4 2024-07-01-05:00 false 0001921865 ASP Isotopes Inc. ASPI 0002026548 Kiessling Heather C/O ASP ISOTOPES INC. 1101 PENNSYLVANIA AVENUE NW, SUITE 300 WASHINGTON, DC DC 20004 false true false false Chief Financial Officer false Common Stock 2024-07-01-05:00 4 A false 400000 A 412500 D This award of common stock was made in connection with the appointment of Ms. Kiessling as chief financial officer effective July 1, 2024, and shall vest (subject to compliance with applicable vesting conditions) in eight equal semi-annual installments over a four-year period beginning on the six-month anniversary of the grant date, as previously disclosed in the issuer's Form 8-K filed on June 13, 2024. /s/ Donald Ainscow, as attorney-in-fact 2024-07-01-05:00