SEC Form 4 · accession 0001477932-26-005432
ASP Isotopes Inc. · ASPI
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Donald George Ainscow
Officer — EVP, Gen Counsel, Secretary
Period of report
Sep 2, 2026
Accepted (ET)
Sep 4, 2026 · 9:33 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001921865
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2 | Sep 2, 2026 | S | 23,678 | $3.89 | D | 776,322 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Represents shares automatically sold by ASP Isotopes Inc. (the "Company") on behalf of the reporting person pursuant to a mandatory sell-to-cover provision in the award agreement required to cover minimum statutory tax withholding obligations. The sale does not represent a discretionary trade by the reporting person.
- F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.885 to $3.9202, inclusive. The reporting person undertakes to provide the Company, any stockholder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.