| $211M | ||
| $100M | ||
| $76M | ||
| $60M | ||
| $50M | ||
| $9M |
Buys | $0 | 0 | 0 |
Sells | $13,399,471 | 20 | 100 |
| Kiessling Heather | Chief Financial Officer | 0 | $0 | 1 | $463,840 | $-463,840 |
| Gorley Michael | director | 0 | $0 | 1 | $624,237 | $-624,237 |
| Wider Todd | director | 0 | $0 | 1 | $648,823 | $-648,823 |
| Moore Duncan | director | 0 | $0 | 1 | $696,233 | $-696,233 |
| Ainscow Robert | Chief Operating Officer | 0 | $0 | 8 | $2.2M | $-2.2M |
| Mann Paul Elliot | Chief Executive Officer | 0 | $0 | 8 | $8.76M | $-8.76M |
ASP Isotopes Inc., a pre-commercial stage advanced materials company, focuses on the production, distribution, marketing, and sale of isotopes. It develops Molybdenum-100, a non-radioactive isotope for the medical industry; Carbon-14; and Silicon-28. The company also Uranium-235, an isotope of uranium for carbon-free energy industry. ASP Isotopes Inc. was incorporated in 2021 and is based in Boca Raton, Florida.
Over the last 12 months, insiders at ASP Isotopes Inc. have bought $0 and sold $13.4M worth of ASP Isotopes Inc. stock.
On average, over the past 5 years, insiders at ASP Isotopes Inc. have bought $599,340 and sold $6.83M worth of stock each year.
There was no buying activity among insiders over the last 12 months.
The last purchase of 39,984 shares for transaction amount of $99,960 was made by Mann Paul Elliot (Chief Executive Officer) on 2024‑07‑15.
| 2025-12-18 | Sale | Kiessling Heather | Chief Financial Officer | 80,000 0.0858% | $5.80 | $463,840 | +8.55% | |
| 2025-12-08 | Sale | Ainscow Robert | Interim CEO and COO | 8,438 0.0092% | $6.20 | $52,341 | +0.08% | |
| 2025-12-01 | Sale | Mann Paul Elliot | Executive Chairman | 162,153 0.179% | $5.75 | $932,866 | +9.68% | |
| 2025-11-25 | Sale | Mann Paul Elliot | Executive Officer | 50,000 0.0517% | $5.77 | $288,450 | +1.84% | |
| 2025-11-25 | Sale | Ainscow Robert | Interim CEO and COO | 25,000 0.0259% | $5.77 | $144,225 | +1.84% | |
| 2025-11-17 | Sale | Mann Paul Elliot | Executive Officer | 112,500 0.1269% | $7.51 | $844,538 | -15.12% | |
| 2025-11-17 | Sale | Ainscow Robert | Interim CEO and COO | 67,500 0.0761% | $7.51 | $506,723 | -15.12% | |
| 2025-10-14 | Sale | Ainscow Robert | Interim CEO and COO | 22,500 0.0237% | $13.60 | $305,978 | -52.60% | |
| 2025-09-30 | Sale | Gorley Michael | director | 64,000 0.0706% | $9.75 | $624,237 | -24.87% | |
| 2025-09-15 | Sale | Wider Todd | director | 74,108 0.0762% | $8.76 | $648,823 | -19.01% | |
| 2025-09-09 | Sale | Mann Paul Elliot | Chief Executive Officer | 81,077 0.0871% | $8.39 | $680,123 | -10.24% | |
| 2025-09-08 | Sale | Mann Paul Elliot | Chief Executive Officer | 81,076 0.0882% | $8.53 | $691,408 | -10.43% | |
| 2025-09-08 | Sale | Ainscow Robert | Chief Operating Officer | 8,438 0.0092% | $8.53 | $71,945 | -10.43% | |
| 2025-08-29 | Sale | Moore Duncan | director | 75,000 0.0816% | $9.28 | $696,233 | -16.19% | |
| 2025-04-17 | Sale | Mann Paul Elliot | Chief Executive Officer | 316,666 0.5405% | $5.62 | $1.78M | +34.08% | |
| 2025-04-17 | Sale | Ainscow Robert | Chief Operating Officer | 66,668 0.1138% | $5.62 | $374,761 | +34.08% | |
| 2025-04-16 | Sale | Mann Paul Elliot | Chief Executive Officer | 316,667 0.5236% | $5.45 | $1.72M | +37.43% | |
| 2025-04-16 | Sale | Ainscow Robert | Chief Operating Officer | 66,666 0.1102% | $5.45 | $363,023 | +37.43% | |
| 2025-04-15 | Sale | Mann Paul Elliot | Chief Executive Officer | 316,667 0.5532% | $5.75 | $1.82M | +36.30% | |
| 2025-04-15 | Sale | Ainscow Robert | Chief Operating Officer | 66,666 0.1165% | $5.75 | $383,563 | +36.30% |
| Mann Paul Elliot | Executive Chairman | 7759538 8.3073% | $40.5M | 1 | 8 | +28.85% |
| Ainscow Robert | Interim CEO and COO | 1546255 1.6554% | $8.07M | 1 | 8 | +28.85% |
| Moore Duncan | director | 994553 1.0648% | $5.19M | 5 | 1 | +213.82% |
| Kiessling Heather | Chief Financial Officer | 732500 0.7842% | $3.82M | 0 | 1 | |
| Wider Todd | director | 710230 0.7604% | $3.71M | 1 | 1 | +178.1% |
| Gorley Michael | director | 81360 0.0871% | $424,699.20 | 0 | 1 | |
| AK Jensen Investment Management Ltd | 10 percent owner | 6566874 7.0304% | $34.28M | 3 | 2 | +52.81% |
| Donfeld Joshua Jay | director | 1104167 1.1821% | $5.76M | 1 | 0 | +178.1% |
| Ryan Robert John Andrew | director | 572102 0.6125% | $2.99M | 8 | 0 | +49.32% |
$81,289,914 | 402 | 15.17% | $442.36M | |
$114,765,477 | 174 | 142.31% | $164.7M | |
$26,260,799 | 146 | 32.39% | $708.65M | |
$52,115,428 | 90 | 14.49% | $751.44M | |
$262,155,168 | 88 | 30.74% | $2.3B | |
$20,462,668 | 57 | -3.38% | $1.24B | |
$143,885,869 | 56 | 20.54% | $6.44B | |
$4,919,262 | 38 | -2.65% | $501.01M | |
$3,564,766 | 31 | 1.39% | $552.13M | |
$5,197,776 | 21 | 8.64% | $23.31B | |
ASP Isotopes Inc. (ASPI) | $1,198,681 | 20 | 101.80% | $487.58M |
$9,043,190 | 13 | -13.00% | $23.86M |
| Increased Positions | 130 | +132.65% | 21M | +49.58% |
| Decreased Positions | 43 | -43.88% | 8M | -17.91% |
| New Positions | 50 | New | 4M | New |
| Sold Out Positions | 18 | Sold Out | 1M | Sold Out |
| Total Postitions | 185 | +88.78% | 57M | +31.67% |
| Blackrock, Inc. | $30,745.00 | 4.92% | 5.46M | +1M | +35.55% | 2025-09-30 |
| Vanguard Group Inc | $25,429.00 | 4.07% | 4.52M | +1M | +37.88% | 2025-09-30 |
| Rovida Investment Management Ltd | $18,016.00 | 2.88% | 3.2M | +1M | +45.45% | 2025-09-30 |
| Awm Investment Company, Inc. | $16,657.00 | 2.67% | 2.96M | -972,590 | -24.74% | 2025-09-30 |
| Alyeska Investment Group, L.P. | $15,892.00 | 2.54% | 2.82M | -1M | -32.47% | 2025-09-30 |
| Capital Research Global Investors | $11,505.00 | 1.84% | 2.04M | -824,495 | -28.75% | 2025-09-30 |
| Geode Capital Management, Llc | $10,486.00 | 1.68% | 1.86M | +514,383 | +38.16% | 2025-09-30 |
| Philadelphia Financial Management Of San Francisco, Llc | $9,354.00 | 1.5% | 1.66M | -1M | -37.78% | 2025-09-30 |
| Driehaus Capital Management Llc | $7,994.00 | 1.28% | 1.42M | +14,423 | +1.03% | 2025-09-30 |
| State Street Corp | $7,914.00 | 1.27% | 1.41M | +291,532 | +26.16% | 2025-09-30 |