Todd Wider - Sep 14, 2025 Form 4 Insider Report for ASP Isotopes Inc. (ASPI)

Role
Director
Signature
/s/ Donald Ainscow, as attorney-in-fact
Stock symbol
ASPI
Transactions as of
Sep 14, 2025
Transactions value $
-$648,816
Form type
4
Date filed
10/3/2025, 08:25 PM
Previous filing
Nov 21, 2024
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Wider Todd Director 601 PENNSYLVANIA AVENUE NW,, SOUTH BUILDING, SUITE 900, WASHINGTON /s/ Donald Ainscow, as attorney-in-fact 2025-10-03 0001642715

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ASPI Common Stock Options Exercise $192K +96K +13.52% $2.00 806K Sep 14, 2025 Direct
transaction ASPI Common Stock Tax liability -$192K -21.9K -2.72% $8.77 784K Sep 14, 2025 Direct F1
transaction ASPI Common Stock Sale -$649K -74.1K -9.45% $8.76 710K Sep 15, 2025 Direct F2, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction ASPI Stock Option (right to buy) Options Exercise $0 -96K -100% $0.00 0 Sep 14, 2025 Common Stock 96K $2.00 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents shares withheld by the Company in connection with net share settlement to satisfy the exercise price associated with the reporting person's exercise of a stock option.
F2 The sale of shares reported in this Form 4 includes an amount for the purpose of satisfying the reporting person's income tax liabilities resulting from the vesting of a previously granted restricted stock award and the exercise of a stock option issued pursuant to an issuer equity incentive plan.
F3 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.37 to $9.40, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. (the "Company"), any stockholder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote 3.
F4 These options vested in a single installment 12 months after the grant date. The option was granted on April 4, 2022.