Schedule 13G/A: Statement of Beneficial Ownership by Certain Investors

ASP ISOTOPES INC.
(Incorporated in the State of Delaware,
United States of America)
(Delaware file number 6228898)
Ticker Symbol: NASDAQ: ASPI
ISIN: US00218A1051
LEI: 6488WHV94BZ496OZ3219
JSE Share Code: ISO
("ASPI" or "the Company")

SCHEDULE 13G/A: STATEMENT OF BENEFICIAL OWNERSHIP BY CERTAIN INVESTORS

ASPI stockholders are advised that on 26 March 2026, a Schedule 13G Amendment has been filed with
the U.S. Securities and Exchange Commission.

A copy of the Schedule 13G/A can be found at:
sec.gov/Archives/edgar/data/1921865/000010290926000704/xslSCHEDULE_13G_X02/primary_doc.xml

The Company has a primary listing on the Nasdaq and a secondary listing on the Main Board of the JSE.

27 March 2026

Sponsor
Valeo Capital Proprietary Limited

Date: 27-03-2026 08:25:00
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