ASP Isotopes Inc. (ASPI) · Insider trading
What ASP Isotopes's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$61,800
1 insider, 2 trades
Sold, 12 months
$9.48M
7 insiders, 79% under a plan
Net, 12 months
−$9.42M
bought less sold
Latest filing
2026-10-16
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Mann Paul ElliotDirector, Chairman and CEO | – | $12.65M | 15 | 2026-09-04 | 9,328,570 |
| Ainscow RobertCOO | – | $2.72M | 15 | 2026-10-14 | 2,225,941 |
| Wider ToddDirector | – | $1.27M | 3 | 2026-06-30 | 672,247 |
| Gorley MichaelDirector | – | $812,100 | 2 | 2026-06-30 | 87,908 |
| Moore DuncanDirector | – | $756,655 | 2 | 2026-04-16 | 1,044,928 |
| Kiessling HeatherChief Financial Officer | – | $735,938 | 3 | 2026-07-01 | 1,526,252 |
| Ainscow Donald GeorgeEVP, Gen Counsel, Secretary | – | $706,107 | 2 | 2026-09-02 | 776,322 |
| Ryan Robert John AndrewDirector | $61,800 | – | 2 | 2026-09-30 | 675,222 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-14 | Ainscow RobertCOO | Saleplan | 22,500 | 2.11 | $47,565 | 2,225,941 | Form 4 |
| 2026-09-30 | Ryan Robert John AndrewDirector | Buy | 15,000 | 2.68 | $40,200 | 675,222 | Form 4 |
| 2026-09-28 | Ryan Robert John AndrewDirector | Buy | 8,000 | 2.70 | $21,600 | 660,222 | Form 4 |
| 2026-09-08 | Ainscow RobertCOO | Saleplan | 8,438 | 4.29 | $36,199 | 2,248,441 | Form 4 |
| 2026-09-04 | Mann Paul ElliotDirector, Chairman and CEO | Saleplan | 83,759 | 4.10 | $343,412 | 9,328,570 | Form 4 |
| 2026-09-03 | Mann Paul ElliotDirector, Chairman and CEO | Saleplan | 83,758 | 3.92 | $328,331 | 9,412,329 | Form 4 |
| 2026-09-02 | Mann Paul ElliotDirector, Chairman and CEO | Saleplan | 83,758 | 3.91 | $327,494 | 9,496,087 | Form 4 |
| 2026-09-02 | Ainscow RobertCOO | Saleplan | 25,000 | 3.91 | $97,750 | 2,256,879 | Form 4 |
| 2026-09-02 | Ainscow Donald GeorgeEVP, Gen Counsel, Secretary | Sale | 23,678 | 3.89 | $92,107 | 776,322 | Form 4 |
| 2026-07-01 | Kiessling HeatherChief Financial Officer | Saleplan | 23,124 | 6.28 | $145,219 | 1,526,252 | Form 4 |
| 2026-06-30 | Ainscow Donald GeorgeEVP, Gen Counsel, Secretary | Sale | 100,000 | 6.14 | $614,000 | 800,000 | Form 4 |
| 2026-06-30 | Gorley MichaelDirector | Sale | 30,000 | 6.27 | $188,100 | 87,908 | Form 4 |
| 2026-06-30 | Wider ToddDirector | Sale | 50,000 | 6.12 | $306,000 | 672,247 | Form 4 |
| 2026-06-29 | Wider ToddDirector | Sale | 50,000 | 6.25 | $312,500 | 722,247 | Form 4 |
| 2026-06-08 | Ainscow RobertCOO | Saleplan | 8,438 | 7.00 | $59,066 | 2,281,879 | Form 4 |
| 2026-06-03 | Mann Paul ElliotDirector, Chairman and CEO | Saleplan | 83,759 | 7.76 | $649,970 | 9,579,845 | Form 4 |
| 2026-06-02 | Mann Paul ElliotDirector, Chairman and CEO | Saleplan | 83,758 | 8.29 | $694,354 | 9,663,424 | Form 4 |
| 2026-06-01 | Mann Paul ElliotDirector, Chairman and CEO | Saleplan | 83,758 | 7.88 | $660,013 | 9,747,182 | Form 4 |
| 2026-04-16 | Moore DuncanDirector | Saleplan | 11,642 | 5.21 | $60,655 | 1,044,928 | Form 4 |
| 2026-04-16 | Ainscow RobertCOO | Saleplan | 22,500 | 5.21 | $117,225 | 1,490,317 | Form 4 |
| 2026-04-15 | Kiessling HeatherChief Financial Officer | Saleplan | 23,124 | 5.48 | $126,720 | 709,376 | Form 4 |
| 2026-03-06 | Ainscow RobertCOO | Saleplan | 25,000 | 4.51 | $112,750 | 1,512,817 | Form 4 |
| 2026-03-06 | Ainscow RobertCOO | Saleplan | 8,438 | 5.44 | $45,903 | 1,537,817 | Form 4 |
| 2026-03-02 | Mann Paul ElliotExecutive Chairman | Saleplan | 162,153 | 5.44 | $882,112 | 7,597,385 | Form 4 |
| 2025-12-18 | Kiessling HeatherChief Financial Officer | Sale | 80,000 | 5.80 | $464,000 | 732,500 | Form 4 |
| 2025-12-08 | Ainscow RobertInterim CEO and COO | Saleplan | 8,438 | 6.20 | $52,316 | 1,546,255 | Form 4 |
| 2025-12-01 | Mann Paul ElliotDirector, Executive Chairman | Saleplan | 162,153 | 5.75 | $932,380 | 7,759,538 | Form 4 |
| 2025-11-25 | Mann Paul ElliotDirector, Executive Officer | Saleplan | 50,000 | 5.77 | $288,500 | 7,921,691 | Form 4 |
| 2025-11-25 | Ainscow RobertInterim CEO and COO | Saleplan | 25,000 | 5.77 | $144,250 | 1,554,693 | Form 4 |
| 2025-11-17 | Mann Paul ElliotDirector, Executive Officer | Saleplan | 112,500 | 7.51 | $844,875 | 7,971,691 | Form 4 |
| 2025-11-17 | Ainscow RobertInterim CEO and COO | Saleplan | 67,500 | 7.51 | $506,925 | 1,579,693 | Form 4 |
| 2025-10-14 | Ainscow RobertInterim CEO and COO | Saleplan | 22,500 | 13.60 | $306,000 | 1,647,193 | Form 4 |
| 2025-09-30 | Gorley MichaelDirector | Sale | 64,000 | 9.75 | $624,000 | 81,360 | Form 4 |
| 2025-09-15 | Wider ToddDirector | Sale | 74,108 | 8.76 | $649,186 | 710,230 | Form 4 |
| 2025-09-09 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Saleplan | 81,077 | 8.39 | $680,236 | 8,084,191 | Form 4 |
| 2025-09-08 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Saleplan | 81,076 | 8.53 | $691,578 | 7,234,378 | Form 4 |
| 2025-09-08 | Ainscow RobertChief Operating Officer | Saleplan | 8,438 | 8.53 | $71,976 | 1,411,554 | Form 4 |
| 2025-08-29 | Moore DuncanDirector | Sale | 75,000 | 9.28 | $696,000 | 994,553 | Form 4 |
| 2025-04-17 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Saleplan | 316,666 | 5.62 | $1.78M | 7,315,454 | Form 4 |
| 2025-04-17 | Ainscow RobertChief Operating Officer | Saleplan | 66,668 | 5.62 | $374,674 | 1,419,992 | Form 4 |
4 more
| 2025-04-16 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Saleplan | 316,667 | 5.45 | $1.73M | 7,632,120 | Form 4 |
| 2025-04-16 | Ainscow RobertChief Operating Officer | Saleplan | 66,666 | 5.45 | $363,330 | 1,486,660 | Form 4 |
| 2025-04-15 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Saleplan | 316,667 | 5.75 | $1.82M | 7,948,787 | Form 4 |
| 2025-04-15 | Ainscow RobertChief Operating Officer | Saleplan | 66,666 | 5.75 | $383,330 | 1,553,326 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
22 × grant or award6 × option exercise6 × shares withheld for tax1 × small acquisition
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-05-28 | Kiessling HeatherChief Financial Officer | Grant or award A | +840,000 | – | 1,549,376 | Form 4 |
| 2026-05-28 | Ainscow Donald GeorgeEVP, Gen Counsel, Secretary | Grant or award A | +400,000 | – | 900,000 | Form 4 |
| 2026-05-28 | Ainscow RobertChief Operating Officer | Grant or award A | +800,000 | – | 2,290,317 | Form 4 |
| 2026-05-28 | Mann Paul ElliotDirector, Chairman and CEO | Grant or award A | +2,233,555 | – | 9,830,940 | Form 4 |
| 2025-12-18 | Moore DuncanDirector | Grant or award A | +36,548 | – | 1,056,570 | Form 4 |
| 2025-12-18 | Gorley MichaelDirector | Grant or award A | +36,548 | – | 117,908 | Form 4 |
| 2025-12-18 | Hunter Ralph L. JrDirector | Grant or award A | +36,548 | – | 47,018 | Form 4 |
| 2025-12-18 | Ryan Robert John AndrewDirector | Grant or award A | +36,548 | – | 652,222 | Form 4 |
| 2025-12-18 | Wider ToddDirector | Grant or award A | +36,548 | – | 772,247 | Form 4 |
| 2025-11-12 | Moore DuncanDirector | Grant or award A | +25,469 | – | 1,020,022 | Form 4 |
| 2025-11-12 | Wider ToddDirector | Grant or award A | +25,469 | – | 735,699 | Form 4 |
| 2025-09-14 | Wider ToddDirector | Option exercise M | +96,000 | 2.00 | 806,230 | Form 4 |
| 2025-09-14 | Wider ToddDirector | Shares withheld for tax F | −21,892 | 8.77 | 784,338 | Form 4 |
| 2025-09-09 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Option exercise M | +216,000 | 2.00 | 7,450,378 | Form 4 |
| 2025-09-09 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Shares withheld for tax F | −50,644 | 8.53 | 7,399,734 | Form 4 |
| 2025-09-09 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Option exercise M | +1,000,000 | 2.00 | 8,399,734 | Form 4 |
| 2025-09-09 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Shares withheld for tax F | −234,466 | 8.53 | 8,165,268 | Form 4 |
| 2025-09-09 | Ainscow RobertChief Operating Officer | Option exercise M | +150,000 | 0.25 | 1,564,554 | Form 4 |
| 2025-09-09 | Ainscow RobertChief Operating Officer | Shares withheld for tax F | −4,396 | 8.53 | 1,557,158 | Form 4 |
| 2025-09-09 | Ainscow RobertChief Operating Officer | Option exercise M | +12,000 | 2.00 | 1,569,158 | Form 4 |
| 2025-09-09 | Ainscow RobertChief Operating Officer | Shares withheld for tax F | −2,813 | 8.53 | 1,566,345 | Form 4 |
| 2025-09-09 | Ainscow RobertChief Operating Officer | Option exercise M | +135,000 | 2.00 | 1,701,345 | Form 4 |
| 2025-09-09 | Ainscow RobertChief Operating Officer | Shares withheld for tax F | −31,652 | 8.53 | 1,669,693 | Form 4 |
| 2025-09-06 | Hunter Ralph L. JrDirector | Grant or award A | +10,470 | – | 10,470 | Form 4 |
| 2025-08-01 | Ainscow Donald GeorgeEVP, Gen Counsel, Secretary | Grant or award A | +400,000 | – | 500,000 | Form 4 |
| 2025-04-14 | Mann Paul ElliotDirector, Chief Executive Officer, 10% owner | Grant or award A | +1,441,361 | – | 8,265,454 | Form 4 |
| 2025-04-14 | Kiessling HeatherChief Financial Officer | Grant or award A | +400,000 | – | 812,500 | Form 4 |
| 2025-04-14 | Ainscow RobertChief Operating Officer | Grant or award A | +400,000 | – | 1,619,992 | Form 4 |
| 2024-12-09 | Moore DuncanDirector | Grant or award A | +77,626 | – | 974,315 | Form 4 |
| 2024-12-09 | Moore DuncanDirector | Grant or award A | +95,238 | – | 1,069,553 | Form 4 |
| 2024-11-29 | Gorley MichaelDirector | Small acquisition L | +1,000 | 5.05 | 145,360 | Form 5 |
| 2024-11-20 | Gorley MichaelDirector | Grant or award A | +42,522 | – | 144,360 | Form 4 |
| 2024-11-20 | Ryan Robert John AndrewDirector | Grant or award A | +42,522 | – | 614,624 | Form 4 |
| 2024-11-20 | Moore DuncanDirector | Grant or award A | +42,522 | – | 896,689 | Form 4 |
| 2024-11-20 | Wider ToddDirector | Grant or award A | +42,522 | – | 710,230 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.