ASP Isotopes Inc. (ASPI) Insider Trading
Directors, officers and holders of more than 10% of ASPI report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 89 transactions on file: 1 with code P, 34 with code S and 15 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 16, 2026 | Kiessling Heather | Chief Financial Officer | S Sale | 21,830 | $2.19 | $47,808 |
| Oct 14, 2026 | Ainscow Robert | COO | S Sale | 22,500 | $2.11 | $47,565 |
| Sep 30, 2026 | Ryan Robert John Andrew | Director | P Purchase | 15,000 | $2.68 | $40,200 |
| Sep 8, 2026 | Ainscow Robert | COO | S Sale | 8,438 | $4.29 | $36,216 |
| Sep 4, 2026 | Mann Paul Elliot | Chairman and CEO | S Sale | 83,759 | $4.10 | $343,412 |
| Sep 3, 2026 | Mann Paul Elliot | Chairman and CEO | S Sale | 83,758 | $3.92 | $328,331 |
| Sep 2, 2026 | Mann Paul Elliot | Chairman and CEO | S Sale | 83,758 | $3.91 | $327,494 |
| Sep 2, 2026 | Ainscow Robert | COO | S Sale | 25,000 | $3.90 | $97,625 |
| Sep 2, 2026 | Ainscow Donald George | EVP, Gen Counsel, Secretary | S Sale | 23,678 | $3.89 | $92,107 |
| Jul 1, 2026 | Kiessling Heather | Chief Financial Officer | S Sale | 23,124 | $6.28 | $145,219 |
| Jun 30, 2026 | Ainscow Donald George | EVP, Gen Counsel, Secretary | S Sale | 100,000 | $6.14 | $614,000 |
| Jun 30, 2026 | Wider Todd | Director | S Sale | 50,000 | $6.12 | $306,000 |
| Jun 30, 2026 | Gorley Michael | Director | S Sale | 30,000 | $6.27 | $188,100 |
| Jun 29, 2026 | Wider Todd | Director | S Sale | 50,000 | $6.25 | $312,500 |
| Jun 8, 2026 | Ainscow Robert | COO | S Sale | 8,438 | $7.00 | $59,058 |
| Jun 3, 2026 | Mann Paul Elliot | Chairman and CEO | S Sale | 83,759 | $7.76 | $649,970 |
| Jun 2, 2026 | Mann Paul Elliot | Chairman and CEO | S Sale | 83,758 | $8.29 | $694,354 |
| Jun 1, 2026 | Mann Paul Elliot | Chairman and CEO | S Sale | 83,758 | $7.88 | $660,013 |
| May 28, 2026 | Kiessling Heather | Chief Financial Officer | A Award | 840,000 | Not measured | Not measured |
| May 28, 2026 | Ainscow Robert | COO | A Award | 800,000 | Not measured | Not measured |
| May 28, 2026 | Mann Paul Elliot | Chairman and CEO | A Award | 2,233,555 | Not measured | Not measured |
| May 28, 2026 | Ainscow Donald George | EVP, Gen Counsel, Secretary | A Award | 400,000 | Not measured | Not measured |
| Apr 16, 2026 | Moore Duncan | Director | S Sale | 11,642 | $5.21 | $60,597 |
| Apr 16, 2026 | Ainscow Robert | COO | S Sale | 22,500 | $5.21 | $117,113 |
| Apr 15, 2026 | Kiessling Heather | Chief Financial Officer | S Sale | 23,124 | $5.48 | $126,673 |
| Mar 6, 2026 | Ainscow Robert | COO | S Sale | 8,438 | $5.44 | $45,894 |
| Mar 6, 2026 | Ainscow Robert | COO | S Sale | 25,000 | $4.51 | $112,775 |
| Mar 2, 2026 | Mann Paul Elliot | Chairman and CEO | S Sale | 162,153 | $5.44 | $881,464 |
| Dec 18, 2025 | Kiessling Heather | Chief Financial Officer | S Sale | 80,000 | $5.80 | $463,840 |
| Dec 18, 2025 | Moore Duncan | Director | A Award | 36,548 | Not measured | Not measured |
| Dec 18, 2025 | Wider Todd | Director | A Award | 36,548 | Not measured | Not measured |
| Dec 18, 2025 | Ryan Robert John Andrew | Director | A Award | 36,548 | Not measured | Not measured |
| Dec 18, 2025 | Hunter Ralph L. JR | Director | A Award | 36,548 | Not measured | Not measured |
| Dec 18, 2025 | Gorley Michael | Director | A Award | 36,548 | Not measured | Not measured |
| Dec 8, 2025 | Ainscow Robert | COO | S Sale | 8,438 | $6.20 | $52,341 |
| Dec 1, 2025 | Mann Paul Elliot | Chairman and CEO | S Sale | 162,153 | $5.75 | $932,866 |
| Nov 25, 2025 | Ainscow Robert | COO | S Sale | 25,000 | $5.77 | $144,225 |
| Nov 25, 2025 | Mann Paul Elliot | Chairman and CEO | S Sale | 50,000 | $5.77 | $288,450 |
| Nov 17, 2025 | Ainscow Robert | COO | S Sale | 67,500 | $7.51 | $506,723 |
| Nov 17, 2025 | Mann Paul Elliot | Chairman and CEO | S Sale | 112,500 | $7.51 | $844,538 |
| Nov 12, 2025 | Moore Duncan | Director | A Award | 25,469 | Not measured | Not measured |
| Nov 12, 2025 | Wider Todd | Director | A Award | 25,469 | Not measured | Not measured |
| Oct 14, 2025 | Ainscow Robert | COO | S Sale | 22,500 | $13.60 | $305,978 |
| Sep 30, 2025 | Gorley Michael | Director | S Sale | 64,000 | $9.75 | $624,237 |
| Sep 15, 2025 | Wider Todd | Director | S Sale | 74,108 | $8.76 | $648,823 |
| Sep 14, 2025 | Wider Todd | Director | M Exercise | 96,000 | Not measured | Not measured |
| Sep 14, 2025 | Wider Todd | Director | M Exercise | 96,000 | $2.00 | $192,000 |
| Sep 14, 2025 | Wider Todd | Director | F Tax Payment | 21,892 | $8.77 | $191,993 |
| Sep 9, 2025 | Mann Paul Elliot | Chairman and CEO | M Exercise | 216,000 | Not measured | Not measured |
| Sep 9, 2025 | Mann Paul Elliot | Chairman and CEO | S Sale | 81,077 | $8.39 | $680,123 |
The full Form 4 history is on the ASPI company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.