Insider sells 33,438 shares at ASP Isotopes Inc. (NASDAQ: ASPI) — Form 144

Rhea-AI Filing Summary

ASP Isotopes Inc. reported proposed and recent sales of Common Stock by an affiliate via a Form 144 disclosure. The filing shows a 400,000-share Restricted Stock Award acquired 04/14/2025 and two recent dispositions: 8,438 shares sold on 03/06/2026 for $45,894.28 and 25,000 shares sold on 04/13/2026 for $112,775.00.

The record lists these trades as equity compensation and brokered sales; the filing names Robert Ainscow as the selling contact. Timing and amounts are shown explicitly in the disclosure.

Insights

Securities Compliance Analyst

Form 144 shows recent insider dispositions and an earlier restricted award.

The filing documents two cash dispositions totaling $158,669.28 across March and April 2026 and a prior 400,000-share Restricted Stock Award granted 04/14/2025. The entries are typical Form 144 reporting for sales under Rule 144.

Confirmatory items to watch in subsequent filings include whether additional sales are reported against the 400,000 award and any footnotes about Rule 144 holding periods or broker arrangements; timing and further activity must be read from future filings.

Key Figures

Restricted Stock Award: 400,000 shares Sale on 03/06/2026: 8,438 shares Sale on 04/13/2026: 25,000 shares

3 metrics

Restricted Stock Award 400,000 shares acquired as compensation on 04/14/2025

Sale on 03/06/2026 8,438 shares sold on 03/06/2026 for $45,894.28

Sale on 04/13/2026 25,000 shares sold on 04/13/2026 for $112,775.00

Key Terms

Form 144, Restricted Stock Award, Equity Compensation

3 terms

Form 144 regulatory

"Securities Sold During The Past 3 Months"

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

"Acquired as compensation --Restricted Stock Award"

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.

Equity Compensation financial

"400000 | 04/14/2025 | Equity Compensation"

Equity compensation is pay given to employees, executives or contractors in the form of company ownership—such as stock, stock options or restricted shares—rather than just cash. It matters to investors because it can align workers' incentives with shareholders (like paying someone in slices of the same pie they help grow), but it also increases the number of shares outstanding and company expenses, affecting ownership percentages and earnings per share.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	22500	121050.00	125903447	04/16/2026	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	04/14/2025	Acquired as compensation --Restricted Stock Award	Issuer			400000	04/14/2025	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	03/06/2026	8438	45894.28
Ainscow Robert c/o ASP Isotopes Inc. 2200 Ross Avenue, Suite 4575E Dallas TX 75201	Common Stock	04/13/2026	25000	112775.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does ASPI's Form 144 disclose about insider sales?

It discloses two recent insider sales: 8,438 shares sold on 03/06/2026 for $45,894.28 and 25,000 shares sold on 04/13/2026 for $112,775.00. The filing lists these as equity compensation dispositions.

Did ASPI report any equity grants in the Form 144?

Yes: the filing shows a 400,000-share Restricted Stock Award acquired as compensation on 04/14/2025. That award is listed under securities to be sold and marked as equity compensation.

Who is listed as the selling contact on ASPI's Form 144?

The filing lists Robert Ainscow (c/o ASP Isotopes Inc.) with an address in Dallas, TX as the contact for the reported sales. The two sale transactions cite that individual for the reported dispositions.

How much cash did the reported ASPI sales generate?

The two reported sales together generated $158,669.28 in gross proceeds: $45,894.28 from 8,438 shares and $112,775.00 from 25,000 shares, as shown in the filing.

Does the Form 144 indicate future sales or restrictions for ASPI shares?

The filing records the 400,000-share Restricted Stock Award acquired on 04/14/2025, but it does not specify future sale schedules; any planned dispositions or holding-period details would appear in subsequent filings.