CIK 0001921865 · <br>Emerging growth company
ASP Isotopes Inc.
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- ASPI
- Exchange
- Nasdaq
- Industry
- Miscellaneous Chemical Products
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 872618235
- Phone
- 202-756-2245
- Business address
- 2200 ROSS AVENUE, SUITE 4575E, DALLAS, TX, 75201
- Open-market buys, last 90 days
- $61,800
- in 2 filings
- Open-market sales, last 90 days
- $1,320,558
- in 6 filings, $1.2M under 10b5-1 plans
Net −$1,258,758. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-10-16 | Kiessling Heather Chief Financial Officer | Sale | −21,830 | $2.19 | $48K | 1,504,422 |
| 2026-10-14 | Ainscow Robert COO | Sale 10b5-1 | −22,500 | $2.11 | $48K | 2,225,941 |
| 2026-09-08 | Ainscow Robert COO | Sale 10b5-1 | −8,438 | $4.29 | $36K | 2,248,441 |
| 2026-09-04 | Mann Paul Elliot Chairman and CEO | Sale 10b5-1 | −83,759 | $4.10 | $343K | 9,328,570 |
| 2026-09-03 | Mann Paul Elliot Chairman and CEO | Sale 10b5-1 | −83,758 | $3.92 | $328K | 9,412,329 |
| 2026-09-02 | Ainscow Donald George EVP, Gen Counsel, Secretary | Sale | −23,678 | $3.89 | $92K | 776,322 |
| 2026-09-02 | Ainscow Robert COO | Sale 10b5-1 | −25,000 | $3.91 | $98K | 2,256,879 |
| 2026-09-02 | Mann Paul Elliot Chairman and CEO | Sale 10b5-1 | −83,758 | $3.91 | $327K | 9,496,087 |
| 2026-07-01 | Kiessling Heather Chief Financial Officer | Sale 10b5-1 | −23,124 | $6.28 | $145K | 1,526,252 |
| 2026-06-30 | Ainscow Donald George EVP, Gen Counsel, Secretary | Sale | −100,000 | $6.14 | $614K | 800,000 |
| 2026-06-30 | Wider Todd Director | Sale | −50,000 | $6.12 | $306K | 672,247 |
| 2026-06-30 | Gorley Michael Director | Sale | −30,000 | $6.27 | $188K | 87,908 |
| 2026-06-29 | Wider Todd Director | Sale | −50,000 | $6.25 | $313K | 722,247 |
| 2026-06-08 | Ainscow Robert COO | Sale 10b5-1 | −8,438 | $7.00 | $59K | 2,281,879 |
| 2026-06-03 | Mann Paul Elliot Chairman and CEO | Sale 10b5-1 | −83,759 | $7.76 | $650K | 9,579,845 |
| 2026-06-02 | Mann Paul Elliot Chairman and CEO | Sale 10b5-1 | −83,758 | $8.29 | $694K | 9,663,424 |
| 2026-06-01 | Mann Paul Elliot Chairman and CEO | Sale 10b5-1 | −83,758 | $7.88 | $660K | 9,747,182 |
| 2026-04-16 | Ainscow Robert COO | Sale 10b5-1 | −22,500 | $5.21 | $117K | 1,490,317 |
| 2026-04-16 | Moore Duncan Director | Sale 10b5-1 | −11,642 | $5.21 | $61K | 1,044,928 |
| 2026-04-15 | Kiessling Heather Chief Financial Officer | Sale 10b5-1 | −23,124 | $5.48 | $127K | 709,376 |
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