ASPI
ASP Isotopes Inc. Common Stock
NASDAQ · USBasic MaterialsChemicals
$3.88+0.26%
Price as of Jul 20, 2026
ASPI ownership
ASP Isotopes Inc. Common Stock ownership & insider activity
Latest available institutional positioning and SEC Form 4 insider transactions, coalesced at the company entity level when listings share coverage.
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
7
Net (3m)
-$2.6M
Insider trades by month Buys Sells
Nov
Dec
Mar
Apr
Jun
Jul
Context3-month price -23.8%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jul 2, 2026 | Kiessling Heatherofficer: Chief Financial Officer | Sell | 23,124 | $6.28 |
| Jul 2, 2026 | Ainscow Donald Georgeofficer: EVP, Gen Counsel, Secretary | Sell | 100,000 | $6.14 |
| Jul 1, 2026 | Wider Todddirector | Sell | 50,000 | $6.25 |
| Jul 1, 2026 | Gorley Michaeldirector | Sell | 30,000 | $6.27 |
| Jun 10, 2026 | Ainscow Robertofficer: COO | Sell | 8,438 | $7.00 |
| Jun 3, 2026 | Kiessling Heatherofficer: Chief Financial Officer | Grant | 840,000 | — |
| Jun 3, 2026 | Ainscow Donald Georgeofficer: EVP, Gen Counsel, Secretary | Grant | 400,000 | — |
| Jun 3, 2026 | Mann Paul Elliotdirector, officer: Chairman and CEO | Sell | 83,758 | $7.88 |
| Jun 3, 2026 | Mann Paul Elliotdirector, officer: Chairman and CEO | Sell | 83,759 | $7.76 |
| Jun 3, 2026 | Ainscow Robertofficer: Chief Operating Officer | Grant | 800,000 | — |
| Jun 3, 2026 | Mann Paul Elliotdirector, officer: Chairman and CEO | Grant | 2,233,555 | — |
| Apr 17, 2026 | Ainscow Robertofficer: COO | Sell | 22,500 | $5.21 |
| Apr 17, 2026 | Moore Duncandirector | Grant | 25,469 | — |
| Apr 17, 2026 | Moore Duncandirector | Sell | 11,642 | $5.21 |
| Apr 17, 2026 | Moore Duncandirector | Grant | 36,548 | — |
| Apr 17, 2026 | Kiessling Heatherofficer: Chief Financial Officer | Sell | 23,124 | $5.48 |
| Apr 13, 2026 | Ainscow Robertofficer: COO | Sell | 25,000 | $4.51 |
| Mar 6, 2026 | Ainscow Robertofficer: COO | Sell | 8,438 | $5.44 |
| Mar 2, 2026 | Mann Paul Elliotofficer: Executive Chairman | Sell | 162,153 | $5.44 |
| Dec 29, 2025 | Kiessling Heatherofficer: Chief Financial Officer | Sell | 80,000 | $5.80 |
| Dec 22, 2025 | Wider Todddirector | Grant | 36,548 | — |
| Dec 22, 2025 | Gorley Michaeldirector | Grant | 36,548 | — |
| Dec 22, 2025 | Hunter Ralph L. JRdirector | Grant | 36,548 | — |
| Dec 22, 2025 | Ryan Robert John Andrewdirector | Grant | 36,548 | — |
| Dec 11, 2025 | Ainscow Robertofficer: Interim CEO and COO | Sell | 8,438 | $6.20 |
| Dec 3, 2025 | Mann Paul Elliotdirector, officer: Executive Chairman | Sell | 162,153 | $5.75 |
| Nov 28, 2025 | Hunter Ralph L. JRdirector | Grant | 10,470 | — |
| Nov 28, 2025 | Ainscow Donald Georgeofficer: EVP, Gen Counsel, Secretary | Grant | 400,000 | — |
| Nov 28, 2025 | Mann Paul Elliotdirector, officer: Executive Officer | Sell | 50,000 | $5.77 |
| Nov 28, 2025 | Mann Paul Elliotdirector, officer: Executive Officer | Sell | 112,500 | $7.51 |
Source: ASPI SEC Form 4 filings, latest Jul 2, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ASPI positions over the last 6 months (SEC Form 13F).
Increased
158
New positions
97
Reduced
79
Sold out
69
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 8.3M | May 13, 2026 |
| ENCOMPASS CAPITAL ADVISORS LLC | New Position | 6.9M | May 15, 2026 |
| BLACKROCK, INC. | Increased | 6.8M | Feb 12, 2026 |
| VANGUARD GROUP INC | Increased | 6.4M | Jan 29, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 5.3M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 5.1M | May 15, 2026 |
| ALYESKA INVESTMENT GROUP, L.P. | Increased | 4.9M | Feb 13, 2026 |
| ROVIDA INVESTMENT MANAGEMENT LTD | Increased | 4.1M | Feb 10, 2026 |
| ROVIDA INVESTMENT MANAGEMENT LTD | Unchanged | 4.1M | May 19, 2026 |
| UBS GROUP AG | Increased | 3.0M | May 5, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2.7M | May 15, 2026 |
| ALYESKA INVESTMENT GROUP, L.P. | Reduced | 2.7M | May 15, 2026 |
| CITADEL ADVISORS LLC | Reduced | 2.6M | May 15, 2026 |
| UBS GROUP AG | Increased | 2.4M | Jan 29, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2.4M | Feb 9, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.