ASPI
insider transactionsASP Isotopes Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
-1.4M
0 buy · 1.4M sell
Net value · 365d
-$10.4M
$0 in · $10.4M out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
24
0 buy · 1.4M sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
Transactions · 365d
-
Sell·S
COO · 10b5-1
$59.1K
8.4K sh · $7.00
Own -0%
-
Sell·S
Mann Paul Elliot KEY
Chairman and CEO · 10b5-1
$2.0M
251.3K sh · $7.98 avg · 3 lots
Own -3%
-
Grant·A
Mann Paul Elliot KEY
Chairman and CEO · 10b5-1
—
2.2M sh
Own +29%
-
Grant·A
Chief Operating Officer
—
800.0K sh
Own +54%
-
Grant·A
EVP, Gen Counsel, Secretary
—
400.0K sh
Own +80%
-
Grant·A
Chief Financial Officer
—
840.0K sh
Own +118%
-
Sell·S
COO · 10b5-1
$117.1K
22.5K sh · $5.21
Own -1%
-
Sell·S
Director · 10b5-1
$60.6K
11.6K sh · $5.21
Own -1%
-
Sell·S
Chief Financial Officer · 10b5-1
$126.7K
23.1K sh · $5.48
Own -3%
-
Sell·S
COO · 10b5-1
$112.8K
25.0K sh · $4.51
Own -2%
-
Sell·S
COO · 10b5-1
$45.9K
8.4K sh · $5.44
Own -1%
-
Sell·S
Mann Paul Elliot KEY
Executive Chairman · 10b5-1
$882.1K
162.2K sh · $5.44
Own -2%
-
Grant·A
Director · 10b5-1
—
62.0K sh · 2 lots
Own +6%
-
Grant·A
Director
—
36.5K sh
Own +349%
-
Grant·A
Director
—
36.5K sh
Own +6%
-
Grant·A
Director
—
36.5K sh
Own +45%
-
Grant·A
Director
—
36.5K sh
Own +5%
-
Sell·S
Chief Financial Officer
$464.0K
80.0K sh · $5.80
Own -10%
-
Sell·S
Ainscow Robert KEY
Interim CEO and COO · 10b5-1
$52.3K
8.4K sh · $6.20
Own -1%
-
Sell·S
Mann Paul Elliot KEY
Executive Chairman · 10b5-1
$932.4K
162.2K sh · $5.75
Own -2%
-
Sell·S
Executive Officer · 10b5-1
$1.1M
162.5K sh · $6.97 avg · 2 lots
Own -2%
-
Sell·S
Ainscow Robert KEY
Interim CEO and COO · 10b5-1
$144.2K
25.0K sh · $5.77
Own -2%
-
Sell·S
Ainscow Robert KEY
Interim CEO and COO · 10b5-1
$506.9K
67.5K sh · $7.51
Own -4%
-
Grant·A
Director
—
25.5K sh
Own +4%
-
Sell·S
Ainscow Robert KEY
Interim CEO and COO · 10b5-1
$306.0K
22.5K sh · $13.60
Own -1%
-
Sell·S
Director
$624.0K
64.0K sh · $9.75
Own -44%
-
Sell·S
Director
$649.2K
74.1K sh · $8.76
Own -9%
-
Exercise·M
Director
$0
96.0K sh
Own New
-
Exercise·M
Director
$192.0K
96.0K sh · $2.00
Own +14%
-
Other·F
Director
$192.0K
21.9K sh · $8.77
Own -3%
-
Exercise·M
Mann Paul Elliot KEY
Chief Executive Officer · 10b5-1
$0
1.2M sh · 2 lots
Own New
-
Other·F
Mann Paul Elliot KEY
Chief Executive Officer · 10b5-1
$2.4M
285.1K sh · $8.53 avg · 2 lots
Own -3%
-
Exercise·M
Mann Paul Elliot KEY
Chief Executive Officer · 10b5-1
$2.4M
1.2M sh · $2.00 avg · 2 lots
Own +17%
-
Sell·S
Mann Paul Elliot KEY
Chief Executive Officer · 10b5-1
$1.4M
162.2K sh · $8.46 avg · 2 lots
Own -2%
-
Exercise·M
Chief Operating Officer · 10b5-1
$0
297.0K sh · 3 lots
Own New
-
Exercise·M
Chief Operating Officer · 10b5-1
$331.5K
297.0K sh · $1.12 avg · 3 lots
Own +23%
-
Other·F
Chief Operating Officer · 10b5-1
$331.5K
38.9K sh · $8.53 avg · 3 lots
Own -2%
-
Sell·S
Chief Operating Officer · 10b5-1
$72.0K
8.4K sh · $8.53
Own -1%
-
Grant·A
Director
—
10.5K sh
Own New
-
Sell·S
Director
$696.0K
75.0K sh · $9.28
Own -7%
-
Grant·A
EVP, Gen Counsel, Secretary
—
400.0K sh
Own +400%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 8, 2026 | Ainscow Robert 10b5-1 | Sell S | 8.4K | $59.1K |
| Jun 3, 2026 | Mann Paul Elliot KEY 10b5-1 | Sell S | 251.3K3 lots | $2.0M |
| May 28, 2026 | Mann Paul Elliot KEY 10b5-1 | Grant A | 2.2M | — |
| May 28, 2026 | Ainscow Robert | Grant A | 800.0K | — |
| May 28, 2026 | Ainscow Donald George | Grant A | 400.0K | — |
| May 28, 2026 | Kiessling Heather KEY | Grant A | 840.0K | — |
| Apr 16, 2026 | Ainscow Robert 10b5-1 | Sell S | 22.5K | $117.1K |
| Apr 16, 2026 | Moore Duncan 10b5-1 | Sell S | 11.6K | $60.6K |
| Apr 15, 2026 | Kiessling Heather KEY 10b5-1 | Sell S | 23.1K | $126.7K |
| Mar 6, 2026 | Ainscow Robert 10b5-1 | Sell S | 25.0K | $112.8K |
| Mar 6, 2026 | Ainscow Robert 10b5-1 | Sell S | 8.4K | $45.9K |
| Mar 2, 2026 | Mann Paul Elliot KEY 10b5-1 | Sell S | 162.2K | $882.1K |
| Dec 18, 2025 | Moore Duncan 10b5-1 | Grant A | 62.0K2 lots | — |
| Dec 18, 2025 | Hunter Ralph L. JR | Grant A | 36.5K | — |
| Dec 18, 2025 | Ryan Robert John Andrew | Grant A | 36.5K | — |
| Dec 18, 2025 | Gorley Michael | Grant A | 36.5K | — |
| Dec 18, 2025 | Wider Todd | Grant A | 36.5K | — |
| Dec 18, 2025 | Kiessling Heather KEY | Sell S | 80.0K | $464.0K |
| Dec 8, 2025 | Ainscow Robert KEY 10b5-1 | Sell S | 8.4K | $52.3K |
| Dec 1, 2025 | Mann Paul Elliot KEY 10b5-1 | Sell S | 162.2K | $932.4K |
| Nov 25, 2025 | Mann Paul Elliot 10b5-1 | Sell S | 162.5K2 lots | $1.1M |
| Nov 25, 2025 | Ainscow Robert KEY 10b5-1 | Sell S | 25.0K | $144.2K |
| Nov 17, 2025 | Ainscow Robert KEY 10b5-1 | Sell S | 67.5K | $506.9K |
| Nov 12, 2025 | Wider Todd | Grant A | 25.5K | — |
| Oct 14, 2025 | Ainscow Robert KEY 10b5-1 | Sell S | 22.5K | $306.0K |
| Sep 30, 2025 | Gorley Michael | Sell S | 64.0K | $624.0K |
| Sep 15, 2025 | Wider Todd | Sell S | 74.1K | $649.2K |
| Sep 14, 2025 | Wider Todd | Exercise M | 96.0K | $0 |
| Sep 14, 2025 | Wider Todd | Exercise M | 96.0K | $192.0K |
| Sep 14, 2025 | Wider Todd | Other F | 21.9K | $192.0K |
| Sep 9, 2025 | Mann Paul Elliot KEY 10b5-1 | Exercise M | 1.2M2 lots | $0 |
| Sep 9, 2025 | Mann Paul Elliot KEY 10b5-1 | Other F | 285.1K2 lots | $2.4M |
| Sep 9, 2025 | Mann Paul Elliot KEY 10b5-1 | Exercise M | 1.2M2 lots | $2.4M |
| Sep 9, 2025 | Mann Paul Elliot KEY 10b5-1 | Sell S | 162.2K2 lots | $1.4M |
| Sep 9, 2025 | Ainscow Robert 10b5-1 | Exercise M | 297.0K3 lots | $0 |
| Sep 9, 2025 | Ainscow Robert 10b5-1 | Exercise M | 297.0K3 lots | $331.5K |
| Sep 9, 2025 | Ainscow Robert 10b5-1 | Other F | 38.9K3 lots | $331.5K |
| Sep 8, 2025 | Ainscow Robert 10b5-1 | Sell S | 8.4K | $72.0K |
| Sep 6, 2025 | Hunter Ralph L. JR | Grant A | 10.5K | — |
| Aug 29, 2025 | Moore Duncan | Sell S | 75.0K | $696.0K |
| Aug 1, 2025 | Ainscow Donald George | Grant A | 400.0K | — |
Buy Sell Non-market (grant · exercise · gift)
About ASPI insider trading
This page tracks insider transactions for ASP Isotopes Inc. (ASPI) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.