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Start 7-day demoLatest ASPI insider trades
Heather Kiessling - OfficerOpen-market sale$48K- Robert Ainscow - OfficerOpen-market sale$48K
- Robert John Andrew Ryan - DirectorOpen-market purchase$40K
- Robert John Andrew Ryan - DirectorOpen-market purchase$22K
- Robert Ainscow - OfficerOpen-market sale$36K
- Donald George Ainscow - OfficerOpen-market sale$92K
- Robert Ainscow - OfficerOpen-market sale$98K
- Paul Elliot Mann - OfficerOpen-market sale$327K
About ASP Isotopes Inc. (ASPI)
ASP Isotopes Inc. files with the SEC under CIK 0001921865 and is classified as miscellaneous chemical products. It is grouped with Materials companies on this site.
ASPI Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 2 | 23,000 | $62K |
| Open-market sale | 8 | 352,721 | $1.32M |
ASPI insider transactions (Form 4)
1244 Form 4 filings on record, the earliest from Oct 16, 2024, newest first. Filing history page 1 of 2.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Heather Kiessling - Officer | Open-market sale | Common Stock | 21,830 | $2.19 | $48K | |
| Robert Ainscow - Officer | Open-market sale | Common Stock | 22,500 | $2.11 footnote F2 | $48K | |
| ||||||
| Robert John Andrew Ryan - Director | Open-market purchase | Common Stock | 15,000 | $2.68 footnote F1 | $40K | |
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| Robert John Andrew Ryan - Director | Open-market purchase | Common Stock | 8,000 | $2.70 footnote F1 | $22K | |
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| Robert Ainscow - Officer | Open-market sale | Common Stock | 8,438 | $4.29 footnote F2 | $36K | |
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| Donald George Ainscow - Officer | Open-market sale | Common Stock | 23,678 | $3.89 footnote F2 | $92K | |
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| Robert Ainscow - Officer | Open-market sale | Common Stock | 25,000 | $3.91 footnote F2 | $98K | |
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| Paul Elliot Mann - Officer | Open-market sale | Common Stock | 83,758 | $3.91 footnote F2 | $327K | |
| Paul Elliot Mann - Officer | Open-market sale | Common Stock | 83,758 | $3.92 footnote F3 | $328K | |
| Paul Elliot Mann - Officer | Open-market sale | Common Stock | 83,759 | $4.10 footnote F4 | $343K | |
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| Paul Elliot Mann - Officer | Open-market sale | Common Stock | 162,153 | $5.75 footnote F2 | $933K | |
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| Ralph L. Hunter Jr. | Grant or award | Common Stock | 10,470 | - footnote F1 | - | |
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Item 7.01, 9.01
Item 7.01, 9.01
Item 7.01
Item 7.01, 9.01
Item 1.01, 1.02, 2.03, 9.01
Recent ASPI Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Heather Kiessling | Affiliate | 21,830 | $48K | View on EDGAR | |
| Robert Ainscow | Officer | 22,500 | $47K | View on EDGAR | |
| Todd Wider | Director | 200,000 | $590K | View on EDGAR |
ASPI insider trading FAQ
What is the latest insider trade for ASPI?
ASP Isotopes Inc. (ASPI) had 8 insider filings in the last 90 days, with the most recent on 22 October 2026. The full record for ASPI runs to 44 Form 4 filings, the earliest from 16 October 2024. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying ASPI stock?
2 insider purchases of ASPI were filed in the last 90 days, totaling $62K.
How many insiders are selling ASPI stock?
8 insider sales of ASPI were filed in the last 90 days, totaling $1.32M.
Where can I see ASPI SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects ASPI Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Materials companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Heather Kiessling view on EDGAR
- - Robert Ainscow view on EDGAR
- - Robert John Andrew Ryan view on EDGAR
- - Robert John Andrew Ryan view on EDGAR
- - Robert Ainscow view on EDGAR
- - Donald George Ainscow view on EDGAR
- - Robert Ainscow view on EDGAR
- - Paul Elliot Mann view on EDGAR
- - Heather Kiessling view on EDGAR
- - Donald George Ainscow view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Materials
- Where ASPI's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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