This is a routine tax-withholding sale tied to a large restricted stock vesting — not a discretionary insider exit. The 2.2M-share grant (already issued) is the real dilution event; the 144 sale is just the cash-out for taxes. Monitor for any subsequent Form 4 filings that show unplanned open-market sales by Mann, which would be a more bearish signal.
Price Chart
Executive Summary
Director and officer Paul Elliot Mann filed a Form 144 notice to sell 83,758 shares of ASP Isotopes common stock on each of September 2, 3, and 4, 2026, for a total of 251,275 shares. The sale is explicitly to satisfy tax withholding obligations from the quarterly vesting of a 2,233,555-share restricted stock award granted on May 28, 2026. At the $3.78 closing price on September 1, the total proposed sale value is approximately $950,000, representing about 0.16% of the company's $603M market cap — a routine tax-motivated sale by an insider that does not signal a change in business outlook.
Key Facts
- Paul Elliot Mann (Director & Officer) filed Form 144 to sell 251,275 shares total across Sept 2-4, 2026
- Sale is to satisfy income tax liabilities from quarterly vesting of a 2,233,555-share restricted stock award
- Aggregate market value ~$950,000 based on $3.78 closing price on Sept 1, 2026
- Shares acquired as compensation on May 28, 2026 via Restricted Stock Award under issuer equity incentive plan
- Proposed sale represents ~0.16% of ASPI's $603M market cap
Financial Impact
~$950,000 total proposed sale value at $3.78/share, covering tax obligations on a 2.2M-share restricted stock grant
Risk Factors
- Insider selling for tax purposes is routine but could be misinterpreted by the market as a negative signal
- The 2.2M-share restricted stock award represents ~3.5% dilution at current share count, though already disclosed
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 6 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (ASPI) — Batch item 1 | 0001477932-26-005388 |
| Document: 0001477932-26-005388-index.html | 0001477932-26-005388 |
| Document: 0001477932-26-005388.txt | 0001477932-26-005388 |
| 144 Filing (ASPI) — Batch item 4 | 0001477932-26-005388 |
| Document: 0001477932-26-005388-index.html | 0001477932-26-005388 |
| Document: 0001477932-26-005388.txt | 0001477932-26-005388 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 26, 2026 today | 8-K | $2.07 | awaiting T+5 | — | $2.03 (−2.18%) |
Oct 15, 2026 11d ago | 8-K | $2.21 $2.09 | ▼ −5.43% | ▼ −4.42% | $2.03 (−8.34%) |
Oct 2, 2026 24d ago | 8-K | $2.91 $2.65 | ▼ −8.93% | ▼ −10.10% | $2.03 (−30.39%) |
Sep 25, 2026 4w ago | 144 | $2.60 $2.93 | ▲ +12.69% | ▲ +11.49% | $2.03 (−22.09%) |
Sep 9, 2026 6w ago | 425 | $3.82 $3.15 | ▼ −17.54% | ▼ −16.44% | $2.03 (−46.97%) |
Sep 2, 2026 7w ago | 144 | $3.90 $3.31 | ▼ −15.13% | ▼ −13.98% | $2.03 (−48.06%) |
Aug 20, 2026 9w ago | 425 / 8-K | $3.95 $4.04 | ▲ +2.41% | ▲ +1.29% | $2.03 (−48.65%) |
Aug 18, 2026 9w ago | 8-K | $3.86 $4.00 | ▲ +3.63% | ▲ +3.83% | $2.03 (−47.52%) |
Aug 16, 2026 10w ago | Institutional Cluster | $4.02 $3.89 | ▼ −3.23% | ▼ −2.04% | $2.03 (−49.61%) |
Aug 5, 2026 11w ago | 425 | $4.10 $4.28 | ▲ +4.39% | ▲ +3.18% | $2.03 (−50.60%) |
US Market Status
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