Major ASP Isotopes (ASPI) holder Paul Mann reports 7.0% stake

Rhea-AI Filing Summary

ASP Isotopes Inc. received an updated ownership report on its common stock from shareholder Paul E. Mann. Mann reported beneficial ownership of 7,759,538 shares of common stock, representing 7.0% of the class, as of 12/31/2025. He has sole voting and dispositive power over all reported shares, with no shared voting or investment power disclosed.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

ASP Isotopes Inc.

(Name of Issuer)

Common Stock, $0.01 par value

(Title of Class of Securities)

00218A105

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 00218A105

1

Names of Reporting Persons

Mann Paul Elliot

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED KINGDOM

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 7,759,538.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 7,759,538.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,759,538.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.0 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: ASP Isotopes Inc.
(b)	Address of issuer's principal executive offices: 2200 Ross Avenue, Suite 4575E, Dallas, TX 75201
Item 2.
(a)	Name of person filing: Paul E. Mann
(b)	Address or principal business office or, if none, residence: 2200 Ross Avenue, Suite 4575E, Dallas, TX 75201
(c)	Citizenship: United Kingdom
(d)	Title of class of securities: Common Stock, $0.01 par value
(e)	CUSIP No.: 00218A105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 7,759,538 shares
(b)	Percent of class: 7.0%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 7,759,538 shares
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 7,759,538 shares
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Mann Paul Elliot

Signature:	/s/ Paul E. Mann
Name/Title:	Paul E. Mann
Date:	02/17/2026

FAQ

What ownership stake in ASP Isotopes Inc. (ASPI) does Paul E. Mann report?

Paul E. Mann reports beneficial ownership of 7,759,538 ASP Isotopes shares, or 7.0% of the common stock. This ownership reflects his reported influence as a significant shareholder based on his holdings as of December 31, 2025.

Does Paul E. Mann have sole or shared voting power over ASPI shares?

Paul E. Mann reports sole voting power over 7,759,538 ASP Isotopes shares and no shared voting power. He also has sole dispositive power over the same number of shares, indicating individual control over voting and disposition decisions.

What SEC form did Paul E. Mann file regarding ASP Isotopes Inc. (ASPI)?

Paul E. Mann filed Amendment No. 3 to a Schedule 13G for ASP Isotopes Inc. A Schedule 13G is used to report ownership of more than 5% of a company’s stock when held without pursuing control.

As of what date is Paul E. Mann’s 7.0% ownership in ASPI measured?

Paul E. Mann’s 7.0% beneficial ownership in ASP Isotopes is measured as of December 31, 2025. That date is the event date requiring the updated ownership disclosure in the Schedule 13G/A filing.

Is Paul E. Mann’s ASP Isotopes (ASPI) ownership held on behalf of others?

The filing states that ownership of more than 5% on behalf of another person is not applicable. This indicates the reported 7,759,538 shares and 7.0% stake are not disclosed as being held for other beneficial owners.

What class of ASP Isotopes Inc. (ASPI) securities is reported in this Schedule 13G/A?

The filing reports ownership of ASP Isotopes Inc. common stock with a par value of $0.01 per share. All figures, including the 7,759,538 shares and 7.0% stake, relate specifically to this common stock class.