Kiessling Heather 4

What Happened
Heather Kiessling, Chief Financial Officer of ASP Isotopes Inc. (ASPI), sold 23,124 shares on July 1, 2026. The sales generated approximately $145,219 based on a reported weighted-average price of $6.28 per share (individual trade prices ranged $6.13–$6.52). This was a sale (not a purchase) and was executed as a "sell-to-cover" transaction tied to tax withholding for vested restricted stock.

Key Details

• Transaction date: July 1, 2026. Filing date: July 2, 2026 (timely filed).
• Reported price: weighted average $6.28; individual sale prices ranged from $6.13 to $6.52.
• Shares sold: 23,124; gross proceeds ≈ $145,219.
• Shares owned after the transaction: not specified in the provided filing.
• Footnotes: (F1) Sale effected pursuant to a Rule 10b5-1 trading plan adopted Dec 19, 2025 to cover tax withholding on quarterly restricted stock vesting; (F2) price is a weighted average across multiple transactions, with breakdown available on request.
• Transaction code: S (sale) — described as "open market or private sale."

Context
This appears to be a routine sell-to-cover tied to vesting and tax obligations rather than an opportunistic cashing-out or an increased bearish signal. Sales under a pre-established Rule 10b5-1 plan are common for covering withholding and do not, by themselves, indicate a change in insider sentiment.