X0508 4 2024-01-14 0 0001921865 ASP Isotopes Inc. ASPI 0002011790 Ryan Robert John Andrew C/O ASP ISOTOPES INC. 1101 PENNSYLVANIA AVENUE NW, SUITE 300 WASHINGTON, DC DC 20004 1 0 0 0 0 Common Stock 2024-01-14 4 A 0 50251 A 518709 D Common Stock 2024-01-16 4 P 0 2550 1.92 A 521259 D Common Stock 2024-01-17 4 P 0 100 1.91 A 521359 D Common Stock 2024-01-25 4 P 0 100 2.54 A 521459 D Common Stock 2024-01-29 4 P 0 15596 2.35 A 537055 D This award of common stock with a market value of $100,000 on January 14, 2024 was made in connection with the appointment of Mr. Ryan to the board of directors effective January 14, 2024, as previously disclosed in the issuer's Form 8-K filed on January 18, 2024. Open market purchase transactions. /s/ Donald Ainscow, as attorney-in-fact 2024-02-26