ASPI
ASP Isotopes Inc.
ASP Isotopes Inc. insider trading
Insiders at ASP Isotopes Inc. have been buying its stock on the open market. The largest purchase in the last 30 days was Ryan Robert John Andrew (Director) buying $21.6K of ASPI, filed Sep 30, 2026. Every open-market purchase and sale its officers, directors and 10% owners filed in that time is listed below, each linked to the original Form 4.
- Bought on the open market
- $21.6K
- Sold
- $1.2M
- Insiders
- 4
- Latest trade
- Sep 28, 2026
From SEC filings · last 30 days
Recent ASPI insider transactions
Ryan Robert John AndrewDirector
Bought 8,000 sh at $2.70 · 2026-09-28-05:00
$21.6K
FilingAinscow Donald GeorgeEVP, Gen Counsel, Secretary
Sold 23,678 sh at $3.89 · 2026-09-02-05:00
−$92.1K
FilingAinscow RobertCOO
Sold 25,000 sh at $3.90 · 2026-09-02-05:0010b5-1 plan
−$97.6K
FilingMann Paul ElliotChairman and CEO · Director
Sold 83,759 sh at $4.10 · 2026-09-04-05:0010b5-1 plan
−$343.4K
FilingMann Paul ElliotChairman and CEO · Director
Sold 83,758 sh at $3.92 · 2026-09-03-05:0010b5-1 plan
−$328.3K
FilingMann Paul ElliotChairman and CEO · Director
Sold 83,758 sh at $3.91 · 2026-09-02-05:0010b5-1 plan
−$327.5K
Filing
SEC Form 4 data, Q3 2024 to Q2 2026
ASPI insider trading by quarter
Between Jul 01, 2024 and Jun 30, 2026, 7 insiders traded ASPI on the open market: 3 purchases worth $515.3K and 31 sales worth $16.2M, 25 of the sales pre-scheduled under a 10b5-1 plan. In the last four quarters alone: 0 purchases and 23 sales ($9.5M), by 6 insiders.
| Quarter | Bought | Sold | Insiders |
|---|---|---|---|
| Q2 2026 | — | −$2.4M7 sales · all on a plan | |
| Q1 2026 | — | −$158.7K2 sales · all on a plan | |
| Q4 2025 | — | −$3.5M8 sales · 7 on a plan | |
| Q3 2025 | — | −$3.4M6 sales · 3 on a plan | |
| Q2 2025 | — | −$6.4M6 sales · all on a plan | |
| Q1 2025 | — | — | |
| Q4 2024 | — | — | |
| Q3 2024 | +$515.3K3 buys | −$256.4K2 sales |
- Largest purchase
- +$213.5K of ASPI by AK Jensen Investment Management Ltd (10% Owner) on Jul 08, 2024.
- Largest sale
- −$1.8M of ASPI by Mann Paul Elliot (Chief Executive Officer · Director) on Apr 15, 2025, under a 10b5-1 plan.
Open-market transactions through Jun 30, 2026most recent first
Ainscow Robert10b5-1
COO
−$59.1K
Jun 08, 2026
8,438 sh · $7.00
Mann Paul Elliot10b5-1
Chairman and CEO · Director
−$650K
Jun 03, 2026
83,759 sh · $7.76
Mann Paul Elliot10b5-1
Chairman and CEO · Director
−$694.4K
Jun 02, 2026
83,758 sh · $8.29
Mann Paul Elliot10b5-1
Chairman and CEO · Director
−$660K
Jun 01, 2026
83,758 sh · $7.88
Ainscow Robert10b5-1
COO
−$117.2K
Apr 16, 2026
22,500 sh · $5.21
Moore Duncan10b5-1
Director
−$60.7K
Apr 16, 2026
11,642 sh · $5.21
Kiessling Heather10b5-1
Chief Financial Officer
−$126.7K
Apr 15, 2026
23,124 sh · $5.48
Ainscow Robert10b5-1
COO
−$112.8K
Mar 06, 2026
25,000 sh · $4.51
Ainscow Robert10b5-1
COO
−$45.9K
Mar 06, 2026
8,438 sh · $5.44
Kiessling Heather
Chief Financial Officer
−$464K
Dec 18, 2025
80,000 sh · $5.80
Ainscow Robert10b5-1
Interim CEO and COO
−$52.3K
Dec 08, 2025
8,438 sh · $6.20
Mann Paul Elliot10b5-1
Executive Chairman · Director
−$932.4K
Dec 01, 2025
162,153 sh · $5.75
Mann Paul Elliot10b5-1
Executive Officer · Director
−$288.5K
Nov 25, 2025
50,000 sh · $5.77
Ainscow Robert10b5-1
Interim CEO and COO
−$144.3K
Nov 25, 2025
25,000 sh · $5.77
Mann Paul Elliot10b5-1
Executive Officer · Director
−$844.9K
Nov 17, 2025
112,500 sh · $7.51
| Date | Insider | Shares | Price | Value |
|---|---|---|---|---|
| Jun 08, 2026 | Ainscow Robert10b5-1COO | 8,438 | $7.00 | −$59.1K |
| Jun 03, 2026 | Mann Paul Elliot10b5-1Chairman and CEO · Director | 83,759 | $7.76 | −$650K |
| Jun 02, 2026 | Mann Paul Elliot10b5-1Chairman and CEO · Director | 83,758 | $8.29 | −$694.4K |
| Jun 01, 2026 | Mann Paul Elliot10b5-1Chairman and CEO · Director | 83,758 | $7.88 | −$660K |
| Apr 16, 2026 | Ainscow Robert10b5-1COO | 22,500 | $5.21 | −$117.2K |
| Apr 16, 2026 | Moore Duncan10b5-1Director | 11,642 | $5.21 | −$60.7K |
| Apr 15, 2026 | Kiessling Heather10b5-1Chief Financial Officer | 23,124 | $5.48 | −$126.7K |
| Mar 06, 2026 | Ainscow Robert10b5-1COO | 25,000 | $4.51 | −$112.8K |
| Mar 06, 2026 | Ainscow Robert10b5-1COO | 8,438 | $5.44 | −$45.9K |
| Dec 18, 2025 | Kiessling HeatherChief Financial Officer | 80,000 | $5.80 | −$464K |
| Dec 08, 2025 | Ainscow Robert10b5-1Interim CEO and COO | 8,438 | $6.20 | −$52.3K |
| Dec 01, 2025 | Mann Paul Elliot10b5-1Executive Chairman · Director | 162,153 | $5.75 | −$932.4K |
| Nov 25, 2025 | Mann Paul Elliot10b5-1Executive Officer · Director | 50,000 | $5.77 | −$288.5K |
| Nov 25, 2025 | Ainscow Robert10b5-1Interim CEO and COO | 25,000 | $5.77 | −$144.3K |
| Nov 17, 2025 | Mann Paul Elliot10b5-1Executive Officer · Director | 112,500 | $7.51 | −$844.9K |
From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.
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Questions
- Are ASPI insiders buying or selling?
- Between Sep 02, 2026 and Sep 28, 2026, 4 ASP Isotopes Inc. insiders made 1 open-market purchase worth $21.6K and 5 sales worth $1.2M, a net sale of $1.2M. 4 of the sales were pre-scheduled under a Rule 10b5-1 plan.
- How much ASPI stock have insiders bought and sold in the last two years?
- Between Jul 01, 2024 and Jun 30, 2026, 7 ASP Isotopes Inc. insiders made 3 open-market purchases worth $515.3K and 31 sales worth $16.2M. 25 of the sales were pre-scheduled under a Rule 10b5-1 plan. In the four quarters to Jun 30, 2026: no purchases and 23 sales ($9.5M). The largest purchase was AK Jensen Investment Management Ltd buying $213.5K on Jul 08, 2024. The largest sale was Mann Paul Elliot selling $1.8M on Apr 15, 2025.
- What was the largest recent ASPI insider trade?
- Mann Paul Elliot (Chairman and CEO · Director) sold $343.4K of ASPI stock on Sep 04, 2026 at about $4.10 a share, under a pre-scheduled 10b5-1 plan.
- When did an insider last buy ASPI shares?
- The most recent open-market purchase on file is Ryan Robert John Andrew (Director) buying $21.6K on Sep 28, 2026.
- Where does ASPI insider trading data come from?
- From the Form 4 filings ASP Isotopes Inc.'s officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.
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