Form 4: ASPI Interim CEO Sells Shares for Tax Obligations

ASP Isotopes Inc.'s Interim CEO and COO, Robert Ainscow, sold 8,438 shares of common stock at a weighted average price of $6.203 to cover tax withholding obligations.

Summary

• Robert Ainscow, Interim CEO and COO of ASP Isotopes Inc. (ASPI), reported a sale of common stock.
• The transaction involved 8,438 shares sold on December 8, 2025.
• The shares were sold at a weighted average price of $6.203 per share, with individual transaction prices ranging from $6.03 to $6.525.
• This sale was a "sell to cover" transaction, executed under a Rule 10b5-1 trading plan adopted on June 9, 2025, to satisfy tax withholding obligations related to the vesting of restricted stock awards.
• Following the transaction, Ainscow directly beneficially owns 1,546,255 shares of common stock.

Sentiment

Score: 5

Explanation: The sale of shares by the Interim CEO and COO was a non-discretionary "sell to cover" transaction to satisfy tax withholding obligations upon the vesting of restricted stock awards, executed under a pre-arranged 10b5-1 plan. This is a common and expected event for executives receiving equity compensation and does not indicate a change in sentiment towards the company's prospects.

Negatives

• Robert Ainscow's direct beneficial ownership of common stock decreased by 8,438 shares following the transaction.

Future Outlook

NA

Management Comments

• The sales represent "sell to cover" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on June 9, 2025, to cover tax withholding obligations in connection with the vesting of restricted stock awards.

Industry Context

NA

Stakeholder Impact

• Shareholders: A minor reduction in direct insider ownership, but the non-discretionary nature of the sale (for tax purposes under a 10b5-1 plan) generally mitigates negative sentiment.

Key Dates

Recommendation

This Form 4 reports a routine "sell to cover" transaction by an executive to satisfy tax obligations related to restricted stock vesting, executed under a pre-arranged 10b5-1 plan. Such transactions are common and non-discretionary, and typically do not signal a change in the executive's outlook on the company or warrant a change in investment recommendation based solely on this filing. The filing provides no new information regarding the company's operational performance or strategic direction.

Keywords

ASP Isotopes Inc., ASPI, Robert Ainscow, Insider Trading, Form 4, Stock Sale, CEO, COO, Restricted Stock, Tax Obligations, 10b5-1 Plan