Moore Duncan 4

What Happened

• Moore Duncan, an independent director of ASP Isotopes Inc. (ASPI) and member of the QLE Structuring and Strategic Transactions Committee, reported multiple equity transactions. He received two restricted stock awards (25,469 shares on 2025-11-12 and 36,548 shares on 2025-12-18) and later sold 11,642 shares in an open-market/private sale on 2026-04-16 for total proceeds of $60,597 (weighted average price $5.21).
• The sale was executed under a Rule 10b5-1 trading plan adopted by the reporting person on December 31, 2025, and the disposition includes shares sold to satisfy income tax liabilities related to the vesting of a previously granted restricted stock award.

Key Details

• Transaction dates: awards on 2025-11-12 (25,469 shares) and 2025-12-18 (36,548 shares); sale on 2026-04-16 (11,642 shares).
• Sale price: weighted average $5.21; individual sale prices ranged from $5.055 to $5.52. Total proceeds reported: $60,597.
• Share ownership after the transactions: not specified in the data provided in this summary (not disclosed here).
• Notable footnotes: F1/F2 = restricted stock awards tied to director service; F3 = sale under a Rule 10b5-1 plan and includes shares sold to cover tax withholding from vesting; F4 = weighted-average price with available range and offer to provide per-price breakdown on request.
• Timeliness: the open-market sale (4/16/2026) was filed the next day (4/17/2026). The awards dated 11/12/2025 and 12/18/2025 were reported in this Form 4 filed on 2026-04-17 and therefore appear to be reported well after the grant dates.

Context

• Awards (A) are compensation-related restricted stock grants and do not indicate an out-of-pocket purchase decision by the insider; they reflect director compensation.
• The sale (S) was made under a pre-established 10b5-1 trading plan and includes shares sold to meet tax obligations from vesting—common and typically routine for insiders after grants vest.
• For a precise breakdown of how many shares were sold at each price within the reported range, the filing notes the reporting person will provide that information to the company, any shareholder, or the SEC staff upon request.