SEC Form SC 13G filed by ASP Isotopes Inc.

11/14/24 3:01:19 PM ET

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SC 13G 1 ASPIsotopes13g093024t.txt ASPI 13G THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* ASP Isotopes, Inc. (Name of Issuer) Common Stock, No Par Value $0.01 (Title of Class of Securities) 00218A105 (CUSIP Number) September 30,2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule 13G is filed: [X] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person?s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be filed for the purpose of Section 18 of the Securities Exchange Act of 1934 (Act) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). CUSIP No. 00218A105 (1) Names of Reporting Persons. I.R.S. Identification Nos. of Above Persons (entities only): AWM Investment Company, Inc. (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: Delaware, United States Number of Shares Beneficially Owned by Each Reporting Person With (5) Sole Voting Power: 3,659,586** (6) Shared Voting Power: 0** (7) Sole Dispositive Power: 3,659,586** (8) Shared Dispositive Power: 0** (9) Aggregate Amount Beneficially Owned by Each Reporting Person: 3,659,586** (10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions): (11) Percent of Class Represented by Amount in Row (9): 5.1%** (12) Type of Reporting Person (See Instructions): IA **AWM Investment Company, Inc., a Delaware corporation (AWM), is the investment adviser to Special Situations Cayman Fund, L.P. (CAYMAN), Special Situations Fund III QP, L.P. (SSFQP), Special Situations Private Equity Fund, L.P. (SSPE), Special Situations Technology Fund, L.P. (TECH) and Special Situations Technology Fund II, L.P. (TECH II) (CAYMAN, SSFQP, SSPE, TECH and TECH II will hereafter be referred to as the Funds). As the investment adviser to the Funds, AWM holds sole voting and investment power over 468,494 shares of Common Stock of the Issuer (the Shares) held by CAYMAN, 1,671,479 Shares held by SSFQP, 268,236 Shares held by SSPE, 209,547 Shares held by TECH and 1,041,830 Shares held by TECH II. See Items 2 and 4 of this Schedule for additional information. Item 1(a). Name Of Issuer: ASP Isotopes, Inc. Item 1(b). Address of Issuer?s Principal Executive Offices: 1101 Pennsylvania Avenue NW ? Suite 300 Washington, District of Columbia 20004 Item 2(a). Name of Person Filing: The person filing this report is AWM Investment Company, Inc., a Delaware corporation (AWM), which is the investment adviser to Special Situations Cayman Fund, L.P., a Cayman Island limited partnership (CAYMAN), Special Situations Fund III QP, L.P., a Delaware limited partnership (SSFQP) Special Situations Private Equity Fund, L.P., a Delaware limited partnership (SSPE), Special Situations Technology Fund, L.P., a Delaware limited partnership (TECH) and Special Situations Technology Fund II, L.P., a Delaware limited partnership (TECH II), (CAYMAN, SSFQP, SSPE, TECH and TECH II, will hereafter be referred to as the Funds). The principal business of each Fund is to invest in equity and equity-related securities and other securities of any kind or nature. David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner) are members of SSCayman, L.L.C., a Delaware limited liability company (SSCAY), the general partner of CAYMAN. Greenhouse and Stettner are members of: MGP Advisers Limited Partnership, a Delaware limited partnership (MGP), the general partner of SSFQP; MG Advisers, L.L.C., a New York limited liability company (MG), the general partner of SSPE; and SST Advisers, L.L.C., a Delaware limited liability company (SSTA), the general partner of TECH and TECH II. Greenhouse and Stettner are also controlling principals of AWM. Item 2(b). Address of Principal Business Office or, if None, Residence: The principal business address for AWM is c/o Special Situations Funds, 527 Madison Avenue, Suite 2600, New York, NY 10022. Item 2(c). Citizenship: AWM is a Delaware Corporation. Item 2(d). Title of Class of Securities: Common Stock, No Par Value $0.01 Item 2(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: Not Applicable. Item 4. Ownership (a) Amount Beneficially Owned: 3,659,586** (b) Percent of Class: 5.1%** (c) Number of Shares as to which the person has: (i) sole power to vote or to direct the vote: 3,659,586** (ii) shared power to vote or to direct the vote: 0** (iii) sole power to dispose or to direct the disposition of: 3,659,586** (iv) shared power to dispose or to direct the disposition of: 0** ______________________________________________________________________ ** AWM is the investment adviser to each of the Funds. As the investment adviser to the Funds, AWM holds sole voting and investment power over 468,494 shares of Common Stock of the Issuer (the Shares) held by CAYMAN, 1,671,479 Shares held by SSFQP, 268,236 Shares held by SSPE, 209,547 Shares held by TECH and 1,041,830 Shares held by TECH II. Greenhouse and Stettner are members of SSCAY, the general partner of CAYMAN. Greenhouse and Stettner are members of: MGP, the general partner of SSFQP; MG, the general partner of SSPE and SSTA, the general partner of TECH and TECH II. Greenhouse and Stettner are also controlling principals of AWM. Item 5. Ownership of Five Percent or Less of a Class If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following. ___ Item 6. Ownership of More Than Five 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. Certification By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. 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. Dated: November 14, 2024 AWM INVESTMENT COMPANY, INC. By: /s/ Adam Stettner Name: Adam Stettner Title: Executive Vice President Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001) -1-

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Date	Price Target	Rating	Analyst
10/4/2024	$4.50	Buy	Canaccord Genuity
12/5/2023	$3.25	Buy	H.C. Wainwright

SEC Form SC 13G filed by ASP Isotopes Inc.

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