ASPI
ASP Isotopes Inc.
NASDAQ · Basic Materials · Chemicals · US
$3.04
−6.32%0
Insider buys (3m)
9
Insider sells (3m)
-$2.2M
Net value (3m)
-57.1%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Sep 10, 2026 | Ainscow Robert · officer: COO | Sale | 8,438 | $4.29 |
| Sep 4, 2026 | Ainscow Donald George · officer: EVP, Gen Counsel, Secretary | Sale | 23,678 | $3.89 |
| Sep 4, 2026 | Ainscow Robert · officer: COO | Sale | 25,000 | $3.90 |
| Sep 4, 2026 | Mann Paul Elliot · director, officer: Chairman and CEO | Sale | 83,758 | $3.91 |
| Sep 4, 2026 | Mann Paul Elliot · director, officer: Chairman and CEO | Sale | 83,759 | $4.10 |
| Jul 2, 2026 | Kiessling Heather · officer: Chief Financial Officer | Sale | 23,124 | $6.28 |
| Jul 2, 2026 | Ainscow Donald George · officer: EVP, Gen Counsel, Secretary | Sale | 100,000 | $6.14 |
| Jul 1, 2026 | Wider Todd · director | Sale | 50,000 | $6.25 |
| Jul 1, 2026 | Gorley Michael · director | Sale | 30,000 | $6.27 |
| Jun 10, 2026 | Ainscow Robert · officer: COO | Sale | 8,438 | $7.00 |
| Jun 3, 2026 | Ainscow Robert · officer: Chief Operating Officer | A-Award | 800,000 | $0.00 |
| Jun 3, 2026 | Ainscow Donald George · officer: EVP, Gen Counsel, Secretary | A-Award | 400,000 | $0.00 |
| Jun 3, 2026 | Kiessling Heather · officer: Chief Financial Officer | A-Award | 840,000 | $0.00 |
| Jun 3, 2026 | Mann Paul Elliot · director, officer: Chairman and CEO | A-Award | 2,233,555 | $0.00 |
| Jun 3, 2026 | Mann Paul Elliot · director, officer: Chairman and CEO | Sale | 83,759 | $7.76 |
| Jun 3, 2026 | Mann Paul Elliot · director, officer: Chairman and CEO | Sale | 83,758 | $7.88 |
| Apr 17, 2026 | Moore Duncan · director | A-Award | 25,469 | $0.00 |
| Apr 17, 2026 | Kiessling Heather · officer: Chief Financial Officer | Sale | 23,124 | $5.48 |
| Apr 17, 2026 | Ainscow Robert · officer: COO | Sale | 22,500 | $5.21 |
| Apr 17, 2026 | Moore Duncan · director | A-Award | 36,548 | $0.00 |
| Apr 17, 2026 | Moore Duncan · director | Sale | 11,642 | $5.21 |
| Apr 13, 2026 | Ainscow Robert · officer: COO | Sale | 25,000 | $4.51 |
| Mar 6, 2026 | Ainscow Robert · officer: COO | Sale | 8,438 | $5.44 |
| Mar 2, 2026 | Mann Paul Elliot · officer: Executive Chairman | Sale | 162,153 | $5.44 |
| Dec 29, 2025 | Kiessling Heather · officer: Chief Financial Officer | Sale | 80,000 | $5.80 |
| Dec 22, 2025 | Wider Todd · director | A-Award | 36,548 | $0.00 |
| Dec 22, 2025 | Gorley Michael · director | A-Award | 36,548 | $0.00 |
| Dec 22, 2025 | Hunter Ralph L. JR · director | A-Award | 36,548 | $0.00 |
| Dec 22, 2025 | Ryan Robert John Andrew · director | A-Award | 36,548 | $0.00 |
| Dec 11, 2025 | Ainscow Robert · officer: Interim CEO and COO | Sale | 8,438 | $6.20 |
Institutional positioning
13F filings over the trailing two quarters
New 83Increased 157Reduced 93Sold out 28
| Filer | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 9,217,198 | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 8,328,144 | May 13, 2026 |
| ENCOMPASS CAPITAL ADVISORS LLC | New Position | 6,912,054 | May 15, 2026 |
| Encompass Capital Advisors LLC | Reduced | 6,561,754 | Aug 14, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 5,332,840 | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 5,060,464 | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 4,982,953 | Aug 13, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 4,552,753 | Aug 14, 2026 |
| ROVIDA INVESTMENT MANAGEMENT LTD | Unchanged | 4,100,000 | May 19, 2026 |
| Rovida Investment Management Ltd | Unchanged | 4,100,000 | Aug 5, 2026 |
| UBS Group AG | Increased | 3,754,533 | Aug 13, 2026 |
| UBS GROUP AG | Increased | 2,991,709 | May 5, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2,945,901 | Aug 12, 2026 |
| Alyeska Investment Group, L.P. | Increased | 2,843,503 | Aug 14, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2,740,464 | May 15, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Sep 10, 2026