ASP Isotopes (NASDAQ: ASPI) insider transactions
In the twelve months to 10 November 2026, executives and directors of ASP Isotopes reported 28 open-market sales of 1,579,676 shares ($9.4m) and 1 open-market purchase of 8,000 shares ($21,600), by 8 people, according to the Form 4 filings they submitted to the SEC.
Latest transactions
| Date | Insider | Role | Transaction | Shares | Price | Held after | Filing |
|---|---|---|---|---|---|---|---|
| 28 September 2026 | Ryan Robert John Andrew | Director | Open-market purchase | +8,000 | $2.70 | 660,222 | Form 4 |
| 8 September 2026 | Ainscow Robert | COO | Open-market sale | −8,438 | $4.29 | 2,248,441 | Form 4 |
| 4 September 2026 | Mann Paul Elliot | Chairman and CEO | Open-market sale | −83,759 | $4.10 | 9,328,570 | Form 4 |
| 3 September 2026 | Mann Paul Elliot | Chairman and CEO | Open-market sale | −83,758 | $3.92 | 9,412,329 | Form 4 |
| 2 September 2026 | Mann Paul Elliot | Chairman and CEO | Open-market sale | −83,758 | $3.91 | 9,496,087 | Form 4 |
| 2 September 2026 | Ainscow Robert | COO | Open-market sale | −25,000 | $3.91 | 2,256,879 | Form 4 |
| 2 September 2026 | Ainscow Donald George | EVP, Gen Counsel, Secretary | Open-market sale | −23,678 | $3.89 | 776,322 | Form 4 |
| 1 July 2026 | Kiessling Heather | Chief Financial Officer | Open-market sale | −23,124 | $6.28 | 1,526,252 | Form 4 |
| 30 June 2026 | Ainscow Donald George | EVP, Gen Counsel, Secretary | Open-market sale | −100,000 | $6.14 | 800,000 | Form 4 |
| 30 June 2026 | Gorley Michael | Director | Open-market sale | −30,000 | $6.27 | 87,908 | Form 4 |
| 30 June 2026 | Wider Todd | Director | Open-market sale | −50,000 | $6.12 | 672,247 | Form 4 |
| 29 June 2026 | Wider Todd | Director | Open-market sale | −50,000 | $6.25 | 722,247 | Form 4 |
| 8 June 2026 | Ainscow Robert | COO | Open-market sale | −8,438 | $7.00 | 2,281,879 | Form 4 |
| 3 June 2026 | Mann Paul Elliot | Chairman and CEO | Open-market sale | −83,759 | $7.76 | 9,579,845 | Form 4 |
| 2 June 2026 | Mann Paul Elliot | Chairman and CEO | Open-market sale | −83,758 | $8.29 | 9,663,424 | Form 4 |
| 1 June 2026 | Mann Paul Elliot | Chairman and CEO | Open-market sale | −83,758 | $7.88 | 9,747,182 | Form 4 |
| 28 May 2026 | Kiessling Heather | Chief Financial Officer | Grant or award | +840,000 | — | 1,549,376 | Form 4 |
| 28 May 2026 | Ainscow Donald George | EVP, Gen Counsel, Secretary | Grant or award | +400,000 | — | 900,000 | Form 4 |
| 28 May 2026 | Ainscow Robert | Chief Operating Officer | Grant or award | +800,000 | — | 2,290,317 | Form 4 |
| 28 May 2026 | Mann Paul Elliot | Chairman and CEO | Grant or award | +2,233,555 | — | 9,830,940 | Form 4 |
Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.
How to read the table
Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.
Where each row comes from
From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the ASP Isotopes page; the method, in data sources.
Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.