144 0001744816 XXXXXXXX LIVE 0001921865 ASP Isotopes Inc. 001-41555 2200 Ross Avenue Suite 4575E Dallas TX 75201 2144328219 Mann Paul Elliot DIRECTOR OFFICER Common Stock Independent Trading Group (ITG) Inc.

33 Yonge Street Suite Suite 420 Toronto A6 A6 M5E 1

162153 865897 110840122 03/02/2026 NASDAQ Common Stock 04/14/2025 Acquired as compensation --Restricted Stock Award Issuer N 1441361 04/14/2025 Equity Compensation Y The sale of shares reported in this Form 144 includes an amount for the purpose of satisfying the Reporting Person's income tax liabilities resulting from the quarterly vesting of a previously granted restricted stock award for 1,441,361 shares pursuant to an issuer equity incentive plan. The Aggregate Market Value of the shares to be sold is based on the closing market price of $5.34 on February 27, 2026. 03/02/2026 06/09/2025 /s/ Paul Elliot Mann