| $126M | ||
| $85M | ||
| $34M | ||
| $33M | ||
| $32M | ||
| $27M |
Buys | $61,800 | 2 | 6 |
Sells | $9,527,269 | 30 | 94 |
| Ryan Robert John Andrew | director | 2 | $61,800 | 0 | $0 | $61,800 |
| Moore Duncan | director | 0 | $0 | 1 | $60,597 | $-60,597 |
| Gorley Michael | director | 0 | $0 | 1 | $188,100 | $-188,100 |
| Wider Todd | director | 0 | $0 | 2 | $618,500 | $-618,500 |
| Ainscow Donald George | EVP, Gen Counsel, Secretary | 0 | $0 | 2 | $706,107 | $-706,107 |
| Kiessling Heather | Chief Financial Officer | 0 | $0 | 4 | $783,540 | $-783,540 |
| Ainscow Robert | Interim CEO and COO | 0 | $0 | 10 | $1.22M | $-1.22M |
| Mann Paul Elliot | Executive Officer | 0 | $0 | 10 | $5.95M | $-5.95M |
ASP Isotopes Inc. is an emerging advanced materials company, currently in its pre-commercial stage. This firm is dedicated to the comprehensive management of isotopes, encompassing their creation, dissemination, promotion, and eventual sale. The company's developmental portfolio includes Molybdenum-100, a non-radioactive isotope designed for medical applications, alongside Carbon-14 and Silicon-28. Furthermore, ASP Isotopes is involved with Uranium-235, a specific uranium isotope considered crucial for the carbon-free energy sector. Established …
Over the last 12 months, insiders at ASP Isotopes Inc. have bought $61,800 and sold $9.53M worth of ASP Isotopes Inc. stock.
On average, over the past 5 years, insiders at ASP Isotopes Inc. have bought $420,160 and sold $6.65M worth of stock each year.
Highest buying activity among insiders over the last 12 months: Ryan Robert John Andrew (director) — $61,800.
The last purchase of 15,000 shares for transaction amount of $40,200 was made by Ryan Robert John Andrew (director) on 2026‑09‑30.
| 2026-10-16 | Sale | Kiessling Heather | Chief Financial Officer | 21,830 0.0146% | $2.19 | $47,808 | -5.14% | |
| 2026-10-14 | Sale | Ainscow Robert | COO | 22,500 0.015% | $2.11 | $47,565 | -1.33% | |
| 2026-09-30 | Ryan Robert John Andrew | director | 15,000 0.012% | $2.68 | $40,200 | -19.43% | ||
| 2026-09-28 | Ryan Robert John Andrew | director | 8,000 0.0068% | $2.70 | $21,600 | -17.12% | ||
| 2026-09-08 | Sale | Ainscow Robert | COO | 8,438 0.007% | $4.29 | $36,216 | -37.20% | |
| 2026-09-04 | Sale | Mann Paul Elliot | Chairman and CEO | 83,759 0.0649% | $4.10 | $343,412 | -36.90% | |
| 2026-09-03 | Sale | Mann Paul Elliot | Chairman and CEO | 83,758 0.0669% | $3.92 | $328,331 | -31.41% | |
| 2026-09-02 | Sale | Mann Paul Elliot | Chairman and CEO | 83,758 0.0662% | $3.91 | $327,494 | -31.30% | |
| 2026-09-02 | Sale | Ainscow Robert | COO | 25,000 0.0197% | $3.90 | $97,625 | -31.30% | |
| 2026-09-02 | Sale | Ainscow Donald George | EVP, Gen Counsel, Secretary | 23,678 0.0186% | $3.89 | $92,107 | -31.30% | |
| 2026-07-01 | Sale | Kiessling Heather | Chief Financial Officer | 23,124 0.0283% | $6.28 | $145,219 | -37.44% | |
| 2026-06-30 | Sale | Ainscow Donald George | EVP, Gen Counsel, Secretary | 100,000 0.1188% | $6.14 | $614,000 | -37.86% | |
| 2026-06-30 | Sale | Wider Todd | director | 50,000 0.0592% | $6.12 | $306,000 | -37.86% | |
| 2026-06-30 | Sale | Gorley Michael | director | 30,000 0.0364% | $6.27 | $188,100 | -37.86% | |
| 2026-06-29 | Sale | Wider Todd | director | 50,000 0.0605% | $6.25 | $312,500 | -37.78% | |
| 2026-06-08 | Sale | Ainscow Robert | COO | 8,438 0.0104% | $7.00 | $59,058 | -42.17% | |
| 2026-06-03 | Sale | Mann Paul Elliot | Chairman and CEO | 83,759 0.0939% | $7.76 | $649,970 | -47.68% | |
| 2026-06-02 | Sale | Mann Paul Elliot | Chairman and CEO | 83,758 0.1003% | $8.29 | $694,354 | -52.58% | |
| 2026-06-01 | Sale | Mann Paul Elliot | Chairman and CEO | 83,758 0.0992% | $7.88 | $660,013 | -50.50% | |
| 2026-04-16 | Sale | Ainscow Robert | COO | 22,500 0.0276% | $5.21 | $117,113 | -17.42% |
| Mann Paul Elliot | Chairman and CEO | 9328570 6.0848% | $16.88M | 1 | 15 | +28.85% |
| Ainscow Robert | COO | 2225941 1.4519% | $4.03M | 1 | 15 | +28.85% |
| Moore Duncan | director | 1044928 0.6816% | $1.89M | 5 | 2 | +213.82% |
| Ryan Robert John Andrew | director | 675222 0.4404% | $1.22M | 10 | 0 | +49.32% |
| Wider Todd | director | 672247 0.4385% | $1.22M | 1 | 3 | +178.1% |
| AK Jensen Investment Management Ltd | 10 percent owner | 6566874 4.2834% | $11.89M | 3 | 2 | +52.81% |
| Donfeld Joshua Jay | director | 1104167 0.7202% | $2M | 1 | 0 | +178.1% |
$81,294,289 | 403 | 15.11% | $413.77M | |
$114,864,727 | 176 | 7.89% | $249.58M | |
$26,313,359 | 147 | 32.41% | $797.79M | |
$52,279,087 | 96 | 13.64% | $770.83M | |
$263,634,932 | 92 | 28.68% | $1.67B |
| Increased Positions | 128 | +88.89% | 21M | +39.3% |
| Decreased Positions | 66 | -45.83% | 15M | -28.56% |
| New Positions | 50 | New | 4M | New |
| Sold Out Positions | 31 | Sold Out | 10M | Sold Out |
| Total Postitions | 206 | +43.06% | 59M | +10.74% |
| 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 |