ASP Isotopes (ASPI) COO granted 800K common shares in equity award

Rhea-AI Filing Summary

Ainscow Robert reported acquisition or exercise transactions in this Form 4 filing.

ASP Isotopes Inc. Chief Operating Officer Robert Ainscow received an equity grant of 800,000 shares of common stock, awarded at a stated price of $0.0000 per share as compensation. Following this grant, he directly holds 2,290,317 common shares. The award will vest in semi-annual installments over four years, subject to applicable vesting conditions.

Insights

Equity compensation analyst

Routine equity grant increases COO’s direct share holdings.

Chief Operating Officer Robert Ainscow received a grant of 800,000 common shares in ASP Isotopes Inc. at a stated price of $0.0000 per share, indicating a compensation-related award rather than a market purchase.

The filing shows he now holds 2,290,317 shares directly after the grant. The footnote states the award vests in semi-annual installments over a four-year period, which helps align incentives with longer-term company performance.

This is classified as a grant/award acquisition (code A) with no related sales, gifts, or derivative exercises in this filing. As a standard equity compensation event, it is generally viewed as administrative, with impact depending on broader company performance and future disclosures.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Ainscow Robert

Role Chief Operating Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	800,000	$0.00	--

Holdings After Transaction: Common Stock — 2,290,317 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares granted: 800,000 shares Grant price: $0.0000 per share Shares held after grant: 2,290,317 shares +1 more

4 metrics

Shares granted 800,000 shares Common stock grant to COO, code A

Grant price $0.0000 per share Stated price for awarded common stock

Shares held after grant 2,290,317 shares Total direct common shares held by COO post-transaction

Vesting period Four years Semi-annual vesting schedule starting on grant date

Key Terms

Grant, award, or other acquisition, semi-annual installments, vesting conditions

3 terms

Grant, award, or other acquisition financial

"transaction_code_description: "Grant, award, or other acquisition""

semi-annual installments financial

"shall vest ... in semi-annual installments over a four-year period"

vesting conditions financial

"shall vest (subject to compliance with applicable vesting conditions)"

Vesting conditions are the rules that determine when someone earning company stock or stock options actually gains the right to keep or sell them, typically based on staying with the company for a set time or meeting performance targets. Think of it like keys that unlock gradually — some unlock by calendar date, others only after agreed milestones. Investors care because vesting shapes management incentives, the timing of share sales, and the number of shares that can enter the market, which can affect a company's valuation and ownership mix.

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Ainscow Robert

(Last) (First) (Middle)

C/O ASP ISOTOPES INC.

2200 ROSS AVENUE, SUITE 4575E

(Street)

DALLAS TEXAS 75201

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ASP Isotopes Inc. [ ASPI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Operating Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/28/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/28/2026(1)		A		800,000	A	(1)	2,290,317	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This award of common stock shall vest (subject to compliance with applicable vesting conditions) in semi-annual installments over a four-year period beginning on the grant date.

	/s/ Donald Ainscow, as attorney-in-fact	06/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did ASP Isotopes (ASPI) disclose about COO Robert Ainscow’s recent share grant?

ASP Isotopes disclosed that COO Robert Ainscow received a grant of 800,000 shares of common stock at a stated price of $0.0000 per share. This is a compensation-related award, increasing his direct holdings to 2,290,317 common shares after the transaction.

How many ASP Isotopes (ASPI) shares does the COO hold after this Form 4 transaction?

After the reported grant, COO Robert Ainscow directly holds 2,290,317 shares of ASP Isotopes common stock. This total reflects his position following the 800,000-share award disclosed in the Form 4 insider transaction filing with the SEC.

What is the vesting schedule for the ASP Isotopes (ASPI) COO’s 800,000-share award?

The 800,000-share common stock award to ASP Isotopes’ COO vests in semi-annual installments over a four-year period, beginning on the grant date. Vesting is subject to compliance with applicable vesting conditions described in the equity award’s governing terms.

Was the ASP Isotopes (ASPI) COO’s 800,000-share grant a market purchase?

No. The filing classifies the transaction with code A as a grant, award, or other acquisition, with a reported price of $0.0000 per share. This indicates an equity compensation grant rather than an open-market purchase of ASP Isotopes stock by the COO.

Does the ASP Isotopes (ASPI) Form 4 show any stock sales or derivative exercises by the COO?

The Form 4 shows only an acquisition via grant (code A) of 800,000 common shares for the COO. The transaction summary reports no sales, no derivative exercises, no gifts, and no tax-withholding dispositions associated with this particular insider filing.