Robert Ainscow - 06 Mar 2026 Form 4 Insider Report for ASP Isotopes Inc. (ASPI)

Role
COO
Signature
/s/ Donald Ainscow, as attorney-in-fact
Issuer symbol
ASPI
Transactions as of
06 Mar 2026
Net transactions value
-$45,894
Form type
4
Filing time
06 Mar 2026, 21:45:07 UTC
Previous filing
11 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Ainscow Robert COO C/O ASP ISOTOPES INC., 2200 ROSS AVENUE, SUITE 4575E, DALLAS /s/ Donald Ainscow, as attorney-in-fact 06 Mar 2026 0001951275

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ASPI Common Stock Sale $45,894 -8,438 -0.55% $5.44 1,537,817 06 Mar 2026 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Represents "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.
F2 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.00 to $5.65, 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 2.