As of the latest Form 4 filed Jul 2, 2026.
What ASP Isotopes Inc. Common Stock insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 21 most recent filings for ASPI.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-02 | 2026-07-01-05:00 | Kiessling Heather Chief Financial Officer | SSale | −23.1K | $6.28 | $145K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-06-30-05:00 | Ainscow Donald George EVP, Gen Counsel, Secretary | SSale | −100K | $6.14 | $614K | No | Form 4 ↗ |
| 2026-07-01 | 2026-06-30-05:00 | Wider Todd Director | SSale | −50.0K | $6.12 | $306K | No | Form 4 ↗ |
| 2026-07-01 | 2026-06-30-05:00 | Gorley Michael Director | SSale | −30.0K | $6.27 | $188K | No | Form 4 ↗ |
| 2026-07-01 | 2026-06-29-05:00 | Wider Todd Director | SSale | −50.0K | $6.25 | $313K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08-05:00 | Ainscow Robert COO | SSale | −8.44K | $7.00 | $59.1K | Yes (planned) | Form 4 ↗ |
| 2026-06-03 | 2026-06-03-05:00 | Mann Paul Elliot Chairman and CEO | SSale | −83.8K | $7.76 | $650K | Yes (planned) | Form 4 ↗ |
| 2026-06-03 | 2026-06-02-05:00 | Mann Paul Elliot, Chairman and CEO | SSale | −83.8K | $8.29 | $694K | Yes (planned) | Form 4 ↗ |
| 2026-06-03 | 2026-06-01-05:00 | Mann Paul Elliot, Chairman and CEO | SSale | −83.8K | $7.88 | $660K | Yes (planned) | Form 4 ↗ |
| 2026-06-03 | 2026-05-28-05:00 | Mann Paul Elliot, Chairman and CEO | AAward | +2.23M | — | — | Yes (planned) | Form 4 ↗ |
| 2026-06-03 | 2026-05-28-05:00 | Ainscow Robert Chief Operating Officer | AAward | +800K | — | — | No | Form 4 ↗ |
| 2026-06-03 | 2026-05-28-05:00 | Ainscow Donald George EVP, Gen Counsel, Secretary | AAward | +400K | — | — | No | Form 4 ↗ |
| 2026-06-03 | 2026-05-28-05:00 | Kiessling Heather Chief Financial Officer | AAward | +840K | — | — | No | Form 4 ↗ |
| 2026-04-17 | 2026-04-16-05:00 | Ainscow Robert COO | SSale | −22.5K | $5.21 | $117K | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-16-05:00 | Moore Duncan Director | SSale | −11.6K | $5.21 | $60.6K | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-15-05:00 | Kiessling Heather Chief Financial Officer | SSale | −23.1K | $5.48 | $127K | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2025-12-18-05:00 | Moore Duncan Director | AAward | +36.5K | — | — | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2025-11-12-05:00 | Moore Duncan, Director | AAward | +25.5K | — | — | Yes (planned) | Form 4 ↗ |
| 2026-04-13 | 2026-03-06-05:00 | Ainscow Robert COO | SSale | −25.0K | $4.51 | $113K | Yes (planned) | Form 4 ↗ |
| 2026-03-06 | 2026-03-06-05:00 | Ainscow Robert COO | SSale | −8.44K | $5.44 | $45.9K | Yes (planned) | Form 4 ↗ |
| 2026-03-02 | 2026-03-02-05:00 | Mann Paul Elliot Executive Chairman | SSale | +162K | $5.44 | $881K | Yes (planned) | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also ASPI’s full analysis or the market-wide insider trading feed. The tabs above jump to ASPI’s other SEC data.
Source: SEC Form 4 filings for ASPI, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
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