ASPI insider buying and SEC filings, explained
ASP Isotopes Inc. · CIK 1921865
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$62K
Insiders who bought
1
Sold (not marked 10b5-1)
$2.0M
Planned sales (10b5-1)
$6.6M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 16, 2026 | Sale | Heather Kiessling (CFO) sold 21,830 shares at $2.19 ($48K). Holdings down 1% to 1,504,422 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Oct 21, 2026, 9:45 PM ET |
| Oct 14, 2026 | Planned (10b5-1) | Robert Ainscow (President / COO) sold 22,500 shares at about $2.11 ($48K), marked as a 10b5-1 plan trade. Holdings down 1% to 2,225,941 shares. | SEC filing Filed Oct 16, 2026, 9:57 PM ET |
| Sep 30, 2026 | Purchase (code P) | Robert John Andrew Ryan (Director) bought 15,000 shares at about $2.68 ($40K), reported as a purchase (code P). Holdings up 2% to 675,222 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Oct 1, 2026, 5:52 PM ET |
| Sep 28, 2026 | Purchase (code P) | Robert John Andrew Ryan (Director) bought 8,000 shares at about $2.70 ($22K), reported as a purchase (code P). Holdings up 1% to 660,222 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 30, 2026 |
| Sep 8, 2026 | Planned (10b5-1) | Robert Ainscow (President / COO) sold 8,438 shares at about $4.29 ($36K), marked as a 10b5-1 plan trade. Holdings down <1% to 2,248,441 shares. | SEC filing Filed Sep 10, 2026 |
| Sep 2, 2026 | Sale | Donald George Ainscow (EVP, Gen Counsel, Secretary) sold 23,678 shares at about $3.89 ($92K). Holdings down 3% to 776,322 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 4, 2026 |
| Sep 2, 2026 | Planned (10b5-1) | Robert Ainscow (President / COO) sold 25,000 shares at about $3.91 ($98K), marked as a 10b5-1 plan trade. Holdings down 1% to 2,256,879 shares. | SEC filing Filed Sep 4, 2026 |
| Sep 2–4, 2026 | Planned (10b5-1) | Paul Elliot Mann (CEO and Director) sold 251,275 shares between Sep 2 and Sep 4 at about $3.98 ($999K), marked as a 10b5-1 plan trade. Holdings down 3% to 9,328,570 shares. | SEC filing Filed Sep 4, 2026 |
| Jul 1, 2026 | Planned (10b5-1) | Heather Kiessling (CFO) sold 23,124 shares at about $6.28 ($145K), marked as a 10b5-1 plan trade. Holdings down 1% to 1,526,252 shares. | SEC filing Filed Jul 2, 2026 |
| Jun 30, 2026 | Sale | Donald George Ainscow (EVP, Gen Counsel, Secretary) sold 100,000 shares at about $6.14 ($614K). Holdings down 11% to 800,000 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jul 2, 2026 |
| Jun 30, 2026 | Sale | Michael Gorley (Director) sold 30,000 shares at about $6.27 ($188K). Holdings down 25% to 87,908 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jul 1, 2026 |
| Jun 29–30, 2026 | Sale | Todd Wider (Director) sold 100,000 shares between Jun 29 and Jun 30 at about $6.19 ($619K). Holdings down 13% to 672,247 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jul 1, 2026 |
| Jun 8, 2026 | Planned (10b5-1) | Robert Ainscow (President / COO) sold 8,438 shares at about $7.00 ($59K), marked as a 10b5-1 plan trade. Holdings down <1% to 2,281,879 shares. | SEC filing Filed Jun 10, 2026 |
| Jun 1–3, 2026 | Planned (10b5-1) | Paul Elliot Mann (CEO and Director) sold 251,275 shares between Jun 1 and Jun 3 at about $7.98 ($2.0M), marked as a 10b5-1 plan trade. Holdings down 3% to 9,579,845 shares. | SEC filing Filed Jun 3, 2026 |
| Apr 16, 2026 | Planned (10b5-1) | Robert Ainscow (President / COO) sold 22,500 shares at about $5.21 ($117K), marked as a 10b5-1 plan trade. Holdings down 1% to 1,490,317 shares. | SEC filing Filed Apr 17, 2026 |
| Apr 15, 2026 | Planned (10b5-1) | Heather Kiessling (CFO) sold 23,124 shares at about $5.48 ($127K), marked as a 10b5-1 plan trade. Holdings down 3% to 709,376 shares. | SEC filing Filed Apr 17, 2026 |
| Apr 16, 2026 | Planned (10b5-1) | Duncan Moore (Director) sold 11,642 shares at about $5.21 ($61K), marked as a 10b5-1 plan trade. Holdings down 1% to 1,044,928 shares. | SEC filing Filed Apr 17, 2026 |
| Mar 6, 2026 | Planned (10b5-1) | Robert Ainscow (President / COO) sold 25,000 shares at about $4.51 ($113K), marked as a 10b5-1 plan trade. Holdings down 2% to 1,512,817 shares. | SEC filing Filed Apr 13, 2026 |
| Mar 6, 2026 | Planned (10b5-1) | Robert Ainscow (President / COO) sold 8,438 shares at about $5.44 ($46K), marked as a 10b5-1 plan trade. Holdings down 1% to 1,537,817 shares. | SEC filing Filed Mar 6, 2026 |
| Dec 18, 2025 | Sale | Heather Kiessling (CFO) sold 80,000 shares at about $5.80 ($464K). Holdings down 10% to 732,500 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 29, 2025 |
| Dec 8, 2025 | Planned (10b5-1) | Robert Ainscow (CEO) sold 8,438 shares at about $6.20 ($52K), marked as a 10b5-1 plan trade. Holdings down 1% to 1,546,255 shares. | SEC filing Filed Dec 11, 2025 |
| Dec 1, 2025 | Planned (10b5-1) | Paul Elliot Mann (Chair and Director) sold 162,153 shares at about $5.75 ($932K), marked as a 10b5-1 plan trade. Holdings down 2% to 7,759,538 shares. | SEC filing Filed Dec 3, 2025 |
| Nov 25, 2025 | Planned (10b5-1) | Robert Ainscow (CEO) sold 25,000 shares at about $5.77 ($144K), marked as a 10b5-1 plan trade. Holdings down 2% to 1,554,693 shares. | SEC filing Filed Nov 28, 2025 |
| Nov 17–25, 2025 | Planned (10b5-1) | Paul Elliot Mann (Director and Executive Officer) sold 162,500 shares between Nov 17, 2025 and Nov 25, 2025 at about $6.97 ($1.1M), marked as a 10b5-1 plan trade. Holdings down 2% to 7,921,691 shares. | SEC filing Filed Nov 28, 2025 |
| Nov 17, 2025 | Planned (10b5-1) | Robert Ainscow (CEO) sold 67,500 shares at about $7.51 ($507K), marked as a 10b5-1 plan trade. Holdings down 4% to 1,579,693 shares. | SEC filing Filed Nov 19, 2025 |
13 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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