SCHEDULE 13G 0001691879 XXXXXXXX LIVE Class A Common Stock, par value $0.01 per share 01/30/2025 0002029118 Infinity Natural Resources, Inc. 456941103 2605 Cranberry Square Morgantown WV 26508 Rule 13d-1(d) NGP XI US Holdings, L.P. DE 0 9631441 0 9631441 9631441 N 38.7 PN (1) Represents 9,631,441 shares of Class A common stock, par value $0.01 per share ("Class A common stock"), of the Issuer issuable in exchange for of an equivalent number of common units ("Common Units") of Infinity Natural Resources, LLC, a Delaware limited liability company and subsidiary of the Issuer ("INR HOldings") held by the Reporting Persons on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock, par value $0.01 per share ("Class B common stock"), of the Issuer held by the Reporting Persons). (2) Calculated assuming 24,868,941 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 9,631,441 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held by the Reporting Persons. GFW XI, L.L.C. DE 0 9631441 0 9631441 9631441 N 38.7 OO (1) Represents 9,631,441 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 24,868,941 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 9,631,441 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held by the Reporting Persons. NGP Energy Capital Management, L.L.C. TX 0 9631441 0 9631441 9631441 N 38.7 OO (1) Represents 9,631,441 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 24,868,941 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 9,631,441 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held by the Reporting Persons. Infinity Natural Resources, Inc. 2605 Cranberry Square, Morgantown, West Virginia 26508 This statement is filed by the entities and persons listed below, all of whom together are referred to herein as the "Reporting Persons" and each, a "Reporting Person": (i) NGP XI US Holdings, L.P., a Delaware limited partnership ("NGP XI US Holdings"); (ii) GFW XI, L.L.C., a Delaware limited liability company ("GFW XI"); (iii) NGP Energy Capital Management, L.L.C., a Texas limited liability company ("NGP ECM"). The address of the principal business office of each Reporting Person is: c/o NGP Energy Capital Management, L.L.C. 2850 N. Harwood Street 19th Floor Dallas, Texas 75201 See responses to Item 4 on each of the cover pages. Y See responses to Item 9 on each of the cover pages. See responses to Item 11 on each of the cover pages. See responses to Item 5 on each of the cover pages. See responses to Item 6 on each of the cover pages. See responses to Item 7 on each of the cover pages. See responses to Item 8 on each of the cover pages. The shares reported herein are directly held by NGP XI US Holdings. NGP XI Holdings GP L.L.C., a Delaware limited liability company ("NGP XI GP") is the sole general partner of NGP XI US Holdings. NGP Natural Resources XI, L.P., a Delaware limited partnership ("NGP Natural Resources XI"), is the sole member of NGP XI GP. GFW Energy XI, L.P., a Delaware limited partnership ("GFW Energy XI"), is the sole general partner of NGP Natural Resources XI. GFW XI is the sole general partner of GFW Energy XI and has delegated full power and authority to manage GFW Energy XI to NGP ECM. Information with respect to each Reporting Person is given solely by such Reporting Person, and no Reporting Person assumes responsibility for the accuracy or completeness of the information furnished by another Reporting Person. Pursuant to Rule 13d-4 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Reporting Persons expressly declare that the filing of this schedule shall not be construed as an admission that any such person is, for the purposes of Section 13(d) and/or Section 13(g) of the Exchange Act or otherwise, the beneficial owner of any securities covered by this schedule held by any other person, and such beneficial ownership is expressly disclaimed. Y Y Y Y Y Y EXHIBIT LIST Exhibit 1 Joint Filing Agreement, dated as of March 6, 2025, by and among the Reporting Persons (filed herewith). NGP XI US Holdings, L.P. /s/ Chris Carter 03/14/2025 /s/ Chris Carter 03/14/2025 GFW XI, L.L.C. /s/ Chris Carter 03/14/2025 NGP Energy Capital Management, L.L.C. /s/ Chris Carter 03/14/2025