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 |
|---|---|---|---|---|---|---|
| 2026-05-28 | Ainscow Robert Chief Operating Officer | Grant or award | +800,000 | 2,290,317 | ||
| 2026-05-28 | Ainscow Donald George EVP, Gen Counsel, Secretary | Grant or award | +400,000 | 900,000 | ||
| 2026-05-28 | Kiessling Heather Chief Financial Officer | Grant or award | +840,000 | 1,549,376 | ||
| 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 |
| 2026-03-06 | Ainscow Robert COO | Sale 10b5-1 | −25,000 | $4.51 | $113K | 1,512,817 |
| 2026-03-06 | Ainscow Robert COO | Sale 10b5-1 | −8,438 | $5.44 | $46K | 1,537,817 |
| 2026-03-02 | Mann Paul Elliot Executive Chairman | Sale 10b5-1 | +162,153 | $5.44 | $881K | 7,597,385 |
| 2025-12-18 | Moore Duncan Director | Grant or award 10b5-1 | +36,548 | 1,056,570 | ||
| 2025-12-18 | Kiessling Heather Chief Financial Officer | Sale | −80,000 | $5.80 | $464K | 732,500 |
| 2025-12-18 | Wider Todd Director | Grant or award | +36,548 | 772,247 | ||
| 2025-12-18 | Ryan Robert John Andrew Director | Grant or award | +36,548 | 652,222 | ||
| 2025-12-18 | Hunter Ralph L. JR Director | Grant or award | +36,548 | 47,018 | ||
| 2025-12-18 | Gorley Michael Director | Grant or award | +36,548 | 117,908 | ||
| 2025-12-08 | Ainscow Robert Interim CEO and COO | Sale 10b5-1 | −8,438 | $6.20 | $52K | 1,546,255 |
| 2025-12-01 | Mann Paul Elliot Executive Chairman | Sale 10b5-1 | −162,153 | $5.75 | $933K | 7,759,538 |
| 2025-11-25 | Ainscow Robert Interim CEO and COO | Sale 10b5-1 | −25,000 | $5.77 | $144K | 1,554,693 |
| 2025-11-25 | Mann Paul Elliot Executive Officer | Sale 10b5-1 | −50,000 | $5.77 | $288K | 7,921,691 |
| 2025-11-17 | Mann Paul Elliot Executive Officer | Sale 10b5-1 | −112,500 | $7.51 | $845K | 7,971,691 |
Page 2 of 7 · 135 trades