Welcome to our dedicated page for ASP Isotopes SEC filings (Ticker: ASPI), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
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Robert Ainscow, Chief Operating Officer of ASP Isotopes Inc. (ASPI), reported multiple transactions on September 8-9, 2025. On 09/08/2025 he executed "sell to cover" sales under a Rule 10b5-1 plan totaling 8,438 shares at a weighted average price of $8.5263 to cover tax withholding from vested restricted stock. On 09/09/2025 he was granted or exercised employee stock options: option grants/exercises include 150,000 options at $0.25, 12,000 options at $2, and 135,000 options at $2, increasing beneficial ownership by option awards to positions listed. Net-share settlements of option exercises resulted in withholding of 4,396, 2,813, and 31,652 shares. After the reported transactions the filing person beneficially owned 1,669,693 shares.
Insider transactions by Paul Elliot Mann, CEO, director and 10% owner of ASP Isotopes Inc. (ASPI). The Form 4 reports multiple transactions on September 8-9, 2025. The filing shows sales totaling 447,263 shares disposed through Rule 10b5-1 "sell to cover" and net-share settlements at weighted-average prices reported around $8.14–$8.58. The reporting person also acquired or was issued stock/derivative awards: 216,000 and 1,000,000 employee stock options (exercise price $2) reported as acquired on 09/09/2025. Following these transactions, the reporting person beneficially owned 8,084,191 shares (direct).
The filing discloses that some dispositions were effected under a 10b5-1 trading plan adopted June 9, 2025 to cover tax withholding for vesting restricted stock and that other share withholdings satisfied option exercise obligations. No additional financial results or forward-looking statements are included.
Form 144 filing for ASP Isotopes Inc. (ASPI) reports a proposed sale of 8,438 shares of common stock through Independent Trading Group (ITG) on NASDAQ with an aggregate market value of $69,191.60. The filer acquired 300,000 shares on 09/06/2024 as a restricted stock award from the issuer and indicates the securities were granted as equity compensation. The filing shows 91,913,109 shares outstanding for the issuer and lists the approximate sale date as 09/08/2025. No securities were reported sold by the filer in the past three months. The notice includes the standard representation that the seller is not aware of undisclosed material adverse information.
Form 144 Notice: The filing discloses a proposed sale of 8,438 shares of common stock of ASP Isotopes Inc. (ASPI) with an aggregate market value of $69,191.60. The securities are to be sold through Independent Trading Group (ITG) Inc., and the sale is identified for 09/08/2025 on the NASDAQ. The filer acquired 300,000 shares on 09/06/2024 as a restricted stock award from the issuer and the acquisition was paid as equity compensation on the same date. The form states there were no sales by the filer in the prior three months and includes the standard signature representation regarding material nonpublic information.
Moore Duncan, a director of ASP Isotopes Inc. (ASPI), reported the sale of 75,000 shares on 08/29/2025 at a weighted average price of $9.2831. After the sale he beneficially owned 994,553 shares. The filing states the sale included shares sold to satisfy income tax liabilities arising from the vesting of a previously granted restricted stock award for 200,000 shares. The weighted-average price represents multiple trades executed between $8.95 and $10.20. The Form 4 was signed by an attorney-in-fact on 09/03/2025. This disclosure records an insider disposition tied to tax withholding for a stock award.
ASP Isotopes Inc. (ASPI) filed a Form 144 notifying the proposed sale of 75,000 shares of its common stock through Independent Trading Group (ITG) on the NASDAQ with an aggregate market value of $789,750. The filer acquired 200,000 shares as a restricted stock award on August 16, 2023, paid by equity compensation on that date. The approximate date of sale is listed as August 29, 2025. The filing reports no securities sold during the past three months and includes the standard representation that the seller is not aware of undisclosed material adverse information about the issuer.
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