ASP Isotopes Inc. Common Stock (ASPI) has 14 known insider and institutional holders on record. The largest holder is Mann Paul Elliot with 7,597,385 shares. Other notable holders include AK Jensen Investment Management Ltd and Vasnetsov Sergey.
Over the last 12 months, insiders have made 36 transactions in ASPI stock — 11 buys (valued at $881.46K) and 20 sells (valued at $12.77M). Insider selling has exceeded buying during this period.
ASPI Insider Ownership
Top Holder
Mann Paul Elliot
7,597,385 shares
Buys (12 mo)
11
$881.46K value
Sells (12 mo)
20
$12.77M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Mann Paul Elliot |
Executive Chairman |
7,597,385 |
2026-03-02 |
|
| 2 |
Ak Jensen Investment Management Ltd |
10 Percent Owner |
6,716,874 |
2024-10-16 |
|
| 3 |
Vasnetsov Sergey |
Director |
3,838,607 |
2023-03-08 |
|
| 4 |
Strydom Hendrik |
Director |
3,797,423 |
2022-11-16 |
|
| 5 |
Ronander Einar |
Director |
3,597,424 |
2022-11-14 |
|
| 6 |
Ainscow Robert |
COO |
1,537,817 |
2026-03-06 |
|
| 7 |
Donfeld Joshua Jay |
Director |
1,104,167 |
2023-10-30 |
|
| 8 |
Moore Duncan |
Director |
994,553 |
2025-09-03 |
|
| 9 |
Wider Todd |
Director |
772,247 |
2025-12-22 |
|
| 10 |
Kiessling Heather |
Chief Financial Officer |
732,500 |
2025-12-29 |
|
| 11 |
Ryan Robert John Andrew |
Director |
652,222 |
2025-12-22 |
|
| 12 |
Gorley Michael |
Director |
117,908 |
2025-12-22 |
|
| 13 |
Ainscow Donald George |
EVP, Gen Counsel, Secretary |
100,000 |
2025-11-28 |
|
| 14 |
Hunter Ralph L. Jr |
Director |
47,018 |
2025-12-22 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-06 |
Ainscow Robert |
COO |
Informative Sell |
8,438 |
$5.44 |
$45.89K |
| 2026-03-02 |
Mann Paul Elliot |
Executive Chairman |
Informative Buy |
162,153 |
$5.44 |
$881.46K |
| 2025-12-18 |
Kiessling Heather |
Chief Financial Officer |
Informative Sell |
80,000 |
$5.80 |
$463.84K |
| 2025-12-18 |
Hunter Ralph L. Jr |
Director |
RSU Award |
36,548 |
- |
- |
| 2025-12-18 |
Gorley Michael |
Director |
RSU Award |
36,548 |
- |
- |
| 2025-12-18 |
Ryan Robert John Andrew |
Director |
RSU Award |
36,548 |
- |
- |
| 2025-12-18 |
Wider Todd |
Director |
RSU Award |
36,548 |
- |
- |
| 2025-12-08 |
Ainscow Robert |
Interim CEO and COO |
Informative Sell |
8,438 |
$6.20 |
$52.34K |
| 2025-12-01 |
Mann Paul Elliot |
Executive Chairman |
Informative Sell |
162,153 |
$5.75 |
$932.87K |
| 2025-09-06 |
Hunter Ralph L. Jr |
Director |
RSU Award |
10,470 |
- |
- |
| 2025-09-06 |
Hunter Ralph L. Jr |
Director |
Unknown |
- |
- |
- |
| 2025-08-01 |
Ainscow Donald George |
EVP, Gen Counsel, Secretary |
RSU Award |
400,000 |
- |
- |
| 2025-08-01 |
Ainscow Donald George |
EVP, Gen Counsel, Secretary |
Unknown |
- |
- |
- |
| 2025-11-25 |
Ainscow Robert |
Interim CEO and COO |
Informative Sell |
25,000 |
$5.77 |
$144.23K |
| 2025-11-25 |
Mann Paul Elliot |
Executive Officer |
Informative Sell |
50,000 |
$5.77 |
$288.45K |
| 2025-11-17 |
Mann Paul Elliot |
Executive Officer |
Informative Sell |
112,500 |
$7.51 |
$844.54K |
| 2025-11-17 |
Ainscow Robert |
Interim CEO and COO |
Informative Sell |
67,500 |
$7.51 |
$506.72K |
| 2025-11-12 |
Wider Todd |
Director |
RSU Award |
25,469 |
- |
- |
| 2025-10-14 |
Ainscow Robert |
Interim CEO and COO |
Informative Sell |
22,500 |
$13.60 |
$305.98K |
| 2025-09-15 |
Wider Todd |
Director |
Informative Sell |
74,108 |
$8.76 |
$648.82K |
| 2025-09-14 |
Wider Todd |
Director |
Option Exercise (Sell) |
96,000 |
$2.00 |
$192K |
| 2025-09-30 |
Gorley Michael |
Director |
Informative Sell |
64,000 |
$9.75 |
$624.24K |
| 2025-09-09 |
Ainscow Robert |
Chief Operating Officer |
Option Exercise (Sell) |
135,000 |
$2.00 |
$270K |
| 2025-09-08 |
Ainscow Robert |
Chief Operating Officer |
Informative Sell |
8,438 |
$8.53 |
$71.94K |
| 2025-09-09 |
Mann Paul Elliot |
10 Percent Owner, Officer: Chief Executive Officer |
Option Exercise (Sell) |
1,000,000 |
$2.00 |
$2M |
