Director at ASP Isotopes (ASPI) sells 100,000 company shares

Rhea-AI Filing Summary

ASP Isotopes Inc. director Todd Wider sold 100,000 shares of Common Stock in open-market transactions. The Form 4 shows two sales of 50,000 shares each, at reported prices of $6.12 and $6.25 per share, executed as multiple trades within stated price ranges.

Footnotes explain that each reported price is a weighted average, with actual trade prices between $6.21 and $6.31 for one block and between $6.10 and $6.25 for the other. Overall, the filing reflects a net sale of 100,000 shares by the director.

Insider Trade Summary

Net Seller: 100,000 shares ($618,500)

Net Sell 2 txns

Insider Wider Todd

Role null

Sold 100,000 shs ($619K)

Type	Security	Shares	Price	Value
Sale	Common Stock	50,000	$6.25	$313K
Sale	Common Stock	50,000	$6.12	$306K

Holdings After Transaction: Common Stock — 722,247 shares (Direct, null)

Footnotes (1)

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.21 to $6.31, 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 this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.10 to $6.25, inclusive. The reporting person undertakes to provide 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 this footnote.

Key Figures

Total shares sold: 100,000 shares First block sold: 50,000 shares at $6.12/share Second block sold: 50,000 shares at $6.25/share +3 more

6 metrics

Total shares sold 100,000 shares Net open-market sales reported on Form 4

First block sold 50,000 shares at $6.12/share Non-derivative Common Stock sale, weighted average price

Second block sold 50,000 shares at $6.25/share Non-derivative Common Stock sale, weighted average price

Price range block 1 $6.21–$6.31 Actual trade prices for one 50,000-share block

Price range block 2 $6.10–$6.25 Actual trade prices for other 50,000-share block

Net buy/sell shares -100,000 shares transactionSummary netBuySellShares (net-sell)

Key Terms

open-market sale, weighted average price, Common Stock, non-derivative

4 terms

open-market sale financial

"transaction_action: "open-market sale" for each Common Stock transaction"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Common Stock financial

"security_title: "Common Stock" for both non-derivative transactions"

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.

non-derivative financial

"transaction_type: "non-derivative" for each reported sale"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/01/2026 - 09:46 PM Accepted by SEC EDGAR 07/01/2026 - 09:45 PM Learn about SEC filing dates

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^*

Wider Todd

(Last) (First) (Middle)

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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/29/2026

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	06/29/2026		S		50,000	D	$6.25(1)	722,247	D
Common Stock	06/30/2026		S		50,000	D	$6.12(2)	672,247	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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.21 to $6.31, 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 this footnote.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.10 to $6.25, inclusive. The reporting person undertakes to provide 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 this footnote.

	/s/ Donald Ainscow, as attorney-in-fact	07/01/2026
	** 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 insider transaction did ASP Isotopes (ASPI) report for director Todd Wider?

ASP Isotopes reported that director Todd Wider sold 100,000 shares of Common Stock. The Form 4 lists two open-market sales of 50,000 shares each, with reported weighted average sale prices of $6.12 and $6.25 per share.

At what prices did Todd Wider sell ASP Isotopes (ASPI) shares?

Todd Wider’s reported weighted average sale prices were $6.12 and $6.25 per share. Footnotes note actual trades occurred in ranges of $6.21–$6.31 for one block and $6.10–$6.25 for the other, across multiple transactions.

How many ASP Isotopes (ASPI) shares did Todd Wider sell in total?

The Form 4 shows Todd Wider sold a total of 100,000 ASP Isotopes Common Stock shares. This consists of two separate open-market sale entries of 50,000 shares each, both classified as non-derivative transactions in Common Stock.

What type of transaction is reported in the ASP Isotopes (ASPI) Form 4?

The filing reports open-market sales of ASP Isotopes Common Stock by director Todd Wider. Both entries use transaction code “S,” indicating sales in the open market or private transactions, and are categorized as non-derivative equity transactions.

Does the ASP Isotopes (ASPI) Form 4 mention weighted average prices?

Yes. The Form 4 footnotes state each column 4 price is a weighted average. They explain the 50,000-share blocks were sold through multiple trades at prices within specified ranges, and detailed trade breakdowns are available upon request.