Todd Wider - 14 Sep 2025 Form 4 Insider Report for ASP Isotopes Inc. (ASPI)

Reporting relationship: Director
Issuer ticker: ASPI
Reported as of: 14 Sep 2025
Net transaction value: -$648,816
SEC form: 4
Accepted by SEC: 03 Oct 2025, 20:25:54 UTC
Prior SEC filing: 21 Nov 2024
Next SEC filing: 14 Nov 2025
Source filing: View source filing
Reporting owner signature: /s/ Donald Ainscow, as attorney-in-fact

Key filing fact

Todd Wider filed Form 4 for ASP Isotopes Inc. (ASPI) on 03 Oct 2025.

Key facts

This page summarizes Todd Wider's Form 4 filing for ASP Isotopes Inc. (ASPI).
4 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 03 Oct 2025, 20:25.

Change

Previous filing in this sequence was filed on 21 Nov 2024.
Current net transaction value: -$648,816.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001642715 Primary reporting owner

Wider Todd

Relationship: Director
Address: 601 PENNSYLVANIA AVENUE NW,, SOUTH BUILDING, SUITE 900, WASHINGTON
Signature: /s/ Donald Ainscow, as attorney-in-fact
Signature date: 03 Oct 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ASPI transaction

Common Stock

Options Exercise

Transaction value: $192,000
Shares: +96,000
Change %: +14%
Price: $2.00
Shares after: 806,230
Date: 14 Sep 2025
Ownership: Direct

ASPI transaction

Common Stock

Tax liability

Transaction value: $191,993
Shares: -21,892
Change %: -2.7%
Price: $8.77
Shares after: 784,338
Date: 14 Sep 2025
Ownership: Direct
Footnotes: F1

ASPI transaction

Common Stock

Sale

Transaction value: $648,823
Shares: -74,108
Change %: -9.4%
Price: $8.76
Shares after: 710,230
Date: 15 Sep 2025
Ownership: Direct
Footnotes: F2, F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ASPI transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -96,000
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 14 Sep 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 96,000
Exercise price: $2.00
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Represents shares withheld by the Company in connection with net share settlement to satisfy the exercise price associated with the reporting person's exercise of a stock option.

Footnote F2

The sale of shares reported in this Form 4 includes an amount for the purpose of satisfying the reporting person's income tax liabilities resulting from the vesting of a previously granted restricted stock award and the exercise of a stock option issued pursuant to an issuer equity incentive plan.

Footnote F3

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.37 to $9.40, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. (the "Company"), any stockholder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote 3.

Footnote F4

These options vested in a single installment 12 months after the grant date. The option was granted on April 4, 2022.