ASP Isotopes files Rule 144 to resell 300,000 shares

ASP Isotopes Inc. filed a Rule 144 notice regarding proposed sales of Common Stock, listing 300,000 shares issued as a restricted stock award on 09/06/2024.

Rhea-AI Filing Summary

ASP Isotopes Inc. filed a Rule 144 notice regarding proposed sales of Common Stock, listing 300,000 shares issued as a restricted stock award on 09/06/2024.

The filing also records an actual sale of 22,500 shares on 04/16/2026 for $117,112.50. The securities are registered for resale and were acquired as compensation.

Insights

Securities Counsel

Rule 144 filing documents a resale by an issuer insider under restricted stock award rules.

Rule 144 notices provide notice of intended resale under resale safe-harbors and identify the class, acquisition date, and lock-up/holding-period triggers. This filing lists 300,000 shares from a 09/06/2024 restricted stock award and a prior sale of 22,500 shares on 04/16/2026.

Whether these shares are eligible for immediate public resale depends on satisfaction of Rule 144 conditions (holding period, current public information, volume limitations). Subsequent filings or broker reports will show actual resale activity and price realization.

Key Figures

Declared resale amount: 300,000 shares Shares sold (past 3 months): 22,500 shares Proceeds reported: $117,112.50 +2 more

5 metrics

Declared resale amount 300,000 shares Acquired as restricted stock award on <date>09/06/2024</date>

Shares sold (past 3 months) 22,500 shares Sale date <date>04/16/2026</date>

Proceeds reported <money>$117,112.50</money> Proceeds from 22,500-share sale on <date>04/16/2026</date>

Filing type Form 144 Rule 144 notice for resale of restricted shares

Exchange listing NASDAQ Security listed on <date>06/08/2026</date> entry line

Key Terms

Rule 144, Restricted Stock Award, Form 144

3 terms

Rule 144 regulatory

"filed a Rule 144 notice regarding proposed sales of Common Stock"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Award financial

"acquired as compensation -- restricted stock award dated 09/06/2024"

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

Form 144 regulatory

"the filing content is labeled as form type 144 and lists securities to be sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does ASP Isotopes (ASPI) disclose in this Rule 144 filing?

It discloses the proposed resale of 300,000 common shares acquired as a restricted stock award on 09/06/2024. The filing also records a prior sale of 22,500 shares on 04/16/2026 for $117,112.50.

Does the Rule 144 notice mean ASPI will immediately sell 300,000 shares?

No, the notice documents intent to resell under Rule 144; it does not confirm immediate liquidation. Actual sales depend on satisfying Rule 144 conditions and execution via brokers or market transactions.

How much cash did ASPI report from recent insider sales?

The filing shows a sale of 22,500 shares on 04/16/2026 for $117,112.50. The filing lists the larger 300,000-share resale notice separately as shares acquired as compensation.

What type of shares are included in the ASPI Rule 144 filing?

The filing refers to Common Stock acquired as an equity compensation restricted stock award on 09/06/2024. The notice identifies these shares as the subject of the resale filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/08/2026 - 09:45 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001951275
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ASP Isotopes Inc.
SEC File Number	001-41555
Address of Issuer	2200 ROSS AVENUE SUITE 4575E DALLAS TEXAS 75201
Phone	2144328219
Name of Person for Whose Account the Securities are To Be Sold	Ainscow Robert
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	OFFICER

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
COMMON STOCK	INDEPENDENT TRADING GROUP (ITG) INC. 33 YONGE STREET SUITE 420 TORONTO A6 M5E 1G4	8438	58137.82	125903447	06/08/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
COMMON STOCK	09/06/2024	ACQUIRED AS COMPENSATION -- RESTRICTED STOCK AWARD	ISSUER			300000	09/06/2024	EQUITY COMPENSATION

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Ainscow Robert C/O ASP ISOTOPES INC. 2200 ROSS AVENUE, SUITE 4575E DALLAS TX 75201	COMMON STOCK	04/16/2026	22500	117112.50

144: Remarks and Signature

Remarks	The sale of shares reported in this Form 144 includes an amount for the purpose of satisfying the Reporting Person's income tax liabilities resulting from the quarterly vesting of a previously granted restricted stock award for 300,000 shares pursuant to an issuer equity incentive plan. The Aggregate Market Value of the shares to be sold is based on the closing market price of $6.89 on June 8, 2026.
Date of Notice	06/08/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/09/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Robert Ainscow
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)