ASPI Form 144: Proposed sale of Common Stock listed

ASPI filed a Form 144 notice reporting proposed sales of Common Stock.

Rhea-AI Filing Summary

ASPI filed a Form 144 notice reporting proposed sales of Common Stock. The excerpt lists quantities including 231,240 and 23,124 tied to restricted stock awards and a larger figure 125,903,447 in the securities information row with date 04/15/2026.

Key Figures

Listed quantity: 231,240 shares Restricted stock award quantity: 23,124 shares Larger figure in row: 125,903,447 +1 more

4 metrics

Listed quantity 231,240 shares appears in the securities information row

Restricted stock award quantity 23,124 shares listed twice under 'Restricted Stock Award' with dates 04/14/2026 and 04/15/2026

Larger figure in row 125,903,447 numeric entry in the securities information line dated 04/15/2026

Broker-dealer listed J.P. Morgan Securities LLC named in the securities information row

Key Terms

Form 144, Restricted Stock Award, Common Stock, J.P. Morgan Securities LLC

4 terms

Form 144 regulatory

"144: Filer Information"

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.

Restricted Stock Award financial

"Restricted Stock Award | Issuer | 23124 | 04/14/2026"

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.

Common Stock financial

"Common Stock | J.P. Morgan Securities LLC"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

J.P. Morgan Securities LLC other

"J.P. Morgan Securities LLC 270 Park Avenue, 10th Floor"

FAQ

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

What does ASPI's Form 144 filing mean?

It notifies the SEC of proposed sales of ASPI common stock by an affiliate or control person. The filing lists quantities and dates, signaling planned dispositions of restricted stock awards and other common shares disclosed on 04/15/2026.

How many shares does ASPI list for potential sale in this excerpt?

The excerpt displays 231,240 and 23,124 as listed quantities. These numbers appear alongside restricted stock award entries dated 04/14/2026 and 04/15/2026 in the filing excerpt.

Does the Form 144 excerpt show who will broker the sales?

Yes. The excerpt names J.P. Morgan Securities LLC at 270 Park Avenue, New York. That broker-dealer is listed in the securities information row of the excerpt dated 04/15/2026.

Is the filing an indication of completed sales for ASPI?

No. A Form 144 is a notice of proposed sales; it does not confirm completed transactions. The excerpt lists proposed quantities and dates but does not report final sale proceeds or execution details.

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

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Accepted by SEC EDGAR 04/15/2026 - 05:43 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	0002026548
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	214-432-8219
Name of Person for Whose Account the Securities are To Be Sold	Heather Kiessling
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	J.P. Morgan Securities LLC 270 Park Avenue, 10th Floor New York NY 10017	46248	231240	125903447	04/15/2026	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	04/14/2026	Restricted Stock Award	Issuer			23124	04/14/2026	N/A
Common Stock	04/15/2026	Restricted Stock Award	Issuer			23124	04/15/2026	N/A

* 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

Nothing to Report

144: Remarks and Signature

Remarks	Represents sale of shares to satisfy tax withholding obligations incident to the vesting of an award of restricted stock at the rate identified by the Seller as her expected effective tax rate. Of the shares filed today, 23,124 shares are Restricted Stock that will vest within three months from the date of this filing.
Date of Notice	04/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/19/2025
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/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Heather Kiessling
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)