Donald George Ainscow - 01 Aug 2025 Form 4 Insider Report for ASP Isotopes Inc. (ASPI)

Role: EVP, Gen Counsel, Secretary
Signature: /s/ Donald Ainscow
Issuer symbol: ASPI
Transactions as of: 01 Aug 2025
Net transactions value: $0
Form type: 4
Filing time: 28 Nov 2025, 21:49:49 UTC
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Ainscow Donald George	EVP, Gen Counsel, Secretary	C/O ASP ISOTOPES INC., 601 PENNSYLVANIA AVENUE NW, STE 900, WASHINGTON, DC	/s/ Donald Ainscow	28 Nov 2025	0002079961

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ASPI	Common Stock	Award		+400,000	+400%		500,000	01 Aug 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This award of common stock was made in connection with the appointment of Mr. Ainscow as Executive Vice President, General Counsel and Secretary effective August 1, 2025, and shall vest (subject to compliance with applicable vesting conditions) in eight equal semi-annual installments over a four-year period beginning on the six-month anniversary of the grant date.