Sec Form 3 Filing - NGP XI US Holdings, L.P. @ INFINITY NATURAL RESOURCES, INC. - 2025-01-30

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person NGP XI US Holdings, L.P. 2. Issuer Name and Ticker or Trading Symbol INFINITY NATURAL RESOURCES, INC. [ INR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2850 N. HARWOOD STREET, 19TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 01/30/2025 (Street) DALLAS, TX75201 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Class B Common Stock ( 1 ) 9,631,441 D ( 2 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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 Common Units of Infinity Natural Resources, LLC ( 1 ) ( 1 ) ( 1 ) ( 1 ) Class A Common Stock 9,631,441 D ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other NGP XI US Holdings, L.P. 2850 N. HARWOOD STREET, 19TH FLOOR DALLAS, TX75201 X GFW XI, L.L.C. 2850 N. HARWOOD STREET, 19TH FLOOR DALLAS, TX75201 X NGP Energy Capital Management, L.L.C. 2850 N. HARWOOD STREET, 19TH FLOOR DALLAS, TX75201 X Signatures NGP XI US Holdings, L.P., By: NGP XI Holdings GP, L.L.C., its general partner, By: /s/ Chris Carter, Authorized Person 01/30/2025 Signature of Reporting Person Date GFW XI, L.L.C., By: /s/ Chris Carter, Authorized Person 01/30/2025 Signature of Reporting Person Date NGP Energy Capital Management, L.L.C., By: /s/ Chris Carter, Authorized Person 01/30/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Infinity Natural Resources, LLC ("INR LLC"), at the request of each holder, each Common Unit of INR LLC (together with the cancellation for no consideration of an equal number of shares of Class B Common Stock, par value $0.01 per share, of the Issuer) may be redeemed at INR LLC's election for (a) newly-issued shares of Class A Common Stock, par value $0.01 per share, of the Issuer on a one-for-one basis or (b) cash. The Common Units do not expire. Shares of Class B Common Stock do not represent economic interests in the Issuer. ( 2 )The reported securities are directly held by NGP XI US Holdings, L.P. NGP XI Holdings GP, L.L.C. is the sole general partner of the NGP XI US Holdings, L.P. and NGP Natural Resources XI, L.P. is the sole member of NGP XI Holdings GP, L.L.C. G.F.W. Energy XI, L.P. is the sole general partner of NGP Natural Resources XI, L.P. GFW XI, L.L.C. is the sole general partner of G.F.W. Energy XI, L.P. GFW XI, L.L.C. has delegated full power and authority to manage NGP XI US Holdings, L.P. to NGP Energy Capital Management, L.L.C. Chris Carter, Craig Glick, Philip Deutch and Jill Lampert serve on the Executive Committee of NGP Energy Capital Management, L.L.C.

Remarks: This filing shall not be deemed an admission that the Reporting Persons are beneficial owners of all securities covered by this filing for purposes of Section 16 of the Exchange Act or otherwise, and each Reporting Person disclaims beneficial ownership of these securities, except to the extent of such Reporting Person's pecuniary interest therein, if any.

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).

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