Subsidiaries*

Place of Incorporation

ASP Isotopes Guernsey Limited
(formerly, PDS-Photonica Holdings (Guernsey) Limited)

Guernsey

ASP Isotopes South Africa (Proprietary) Limited
(formerly, PDS Photonica Holdings South Africa (PTY) Limited)

South Africa

Enlightened Isotopes (Pty) Ltd

South Africa

ASPI South Africa Asset Finance

South Africa

Enriched Energy LLC

Delaware, U.S.

ASP Isotopes UK Ltd

England & Wales

Enlightened Isotopes (Pty) Ltd

South Africa

ASP Isotopes ehf

Iceland

Quantum Leap Energy LLC

Delaware, U.S.

Quantum Leap Energy Limited

England & Wales

Quantum Leap Energy (Pty) Ltd

South Africa

QLE TP Funding LLC

Delaware, U.S.

PET Labs Pharmaceuticals (Pty) Ltd

South Africa

PET Labs Global Nuclear Medicine SEZC

Cayman Islands

*

Please note that this list includes all subsidiaries of ASP Isotopes Inc. without regard to whether they would constitute a "significant subsidiary" pursuant to Item 601(b)(21)(ii) of Regulation S-K.