Results of Operations and Financial Condition. On August 10, 2026 , Infinity Natural Resources, Inc. (the “Company”) issued a press release announcing its financial and operating results for the quarter ended June 30, 2026. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated herein by reference. On August 10, 2026 , the Company posted an investor presentation related to the financial and operating results for the quarter ended June 30, 2026 to its website at ir.in…

CFO — Cary Baetz: The filing announces the appointment of a new external CFO, not the departure of an existing executive.

Results of Operations and Financial Condition. On July 17, 2026 , Infinity Natural Resources, Inc. (the “Company”) issued a press release that includes preliminary financial and operating results for the second quarter of 2026. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated herein by reference. The information furnished in this Current Report on Form 8-K pursuant to Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for any purpose, including for…

Director — Timothy Dugan: The company appointed Timothy Dugan to the Board, bringing extensive executive leadership experience in the oil and gas industry.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under “

Entry into a Material Definitive Agreement. On June 22, 2026, Infinity Natural Resources, LLC, a Delaware limited liability company (“INR Holdings”), a subsidiary of Infinity Natural Resources, Inc. (the “Company”), entered into that certain Fifth Amendment to Credit Agreement (the “Amendment”), which amends that certain Credit Agreement, dated as of September 25, 2024, by and among INR Holdings, the lenders from time to time party thereto and Citibank, N.A., as the administrative agent, coll…

Results of Operations and Financial Condition. On May 12, 2026, Infinity Natural Resources, Inc. (the “Company”) issued a press release announcing its financial and operating results for the quarter ended March 31, 2026. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated herein by reference. On May 12, 2026, the Company posted an investor presentation related to the financial and operating results for the quarter ended March 31, 2026 to its website at ir.infinity…

Results of Operations and Financial Condition. On April 17, 2026, Infinity Natural Resources, Inc. (the “Company”) issued a press release that includes preliminary financial and operating results for the first quarter of 2026. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated herein by reference. The information furnished in this Current Report on Form 8-K pursuant to Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for any purpose, including for p…

Director — Scott McNeill: Scott McNeill was appointed to the Board of Directors and joined the Audit Committee.

Other Events. Notes Offering Pricing On March 17, 2026, Infinity Natural Resources, Inc. (the “Company”) issued a press release in accordance with Rule 135c under the Securities Act of 1933, as amended (the “Securities Act”), announcing that the Issuer priced the offering of the Notes. A copy of the press release is attached hereto as Exhibit 99.1 and incorporated herein by reference. Purchase Agreement On March 17, 2026, the Issuer, the Company and the Guarantors entered into a purchase agre…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information required by

Entry into a Material Definitive Agreement. Indenture and Notes On March 20, 2026 (the “Closing Date”), Infinity Natural Resources, LLC (the “Issuer”) closed the previously announced private offering of $550.0 million aggregate principal amount of 7.625% senior notes due 2031 (the “Notes”). The Notes were issued under the Indenture, dated as of March 20, 2026 (the “Indenture”), by and among the Issuer, the guarantors party thereto (the “Guarantors”) and U.S. Bank Trust Company, National Assoc…

Other Events. Notes Offering On March 17, 2026, Infinity Natural Resources, Inc. (the “Company”) issued a press release in accordance with Rule 135c under the Securities Act of 1933, as amended (the “Securities Act”), announcing that its subsidiary, Infinity Natural Resources, LLC (the “Issuer”), intends to offer for sale, subject to market conditions and other factors, $500 million in aggregate principal amount of senior notes due 2031 (the “Notes”) in a private placement (the “Offering”) to…

Results of Operations and Financial Condition. On March 10, 2026, Infinity Natural Resources, Inc. (the “Company”) issued a press release announcing its financial and operating results for the quarter and year ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated herein by reference. On March 10, 2026, the Company posted an investor presentation related to the financial and operating results for the quarter and year ended December 31, 2025 t…

Entry into a Material Definitive Agreement. Antero Upstream Purchase Agreement Amendment Under the Upstream Purchase Agreement, INR Holdings was to acquire an undivided 51% interest, and Northern was to acquire an undivided 49% interest, in the Upstream Assets. On February 22, 2026, the Buyers and Upstream Sellers entered into an amendment to the Upstream Purchase Agreement (the “Upstream Amendment”), pursuant to which, among other amendments, INR Holdings will acquire an undivided 60% intere…

Director — Matthew Kelly: Carnelian Energy Capital Management, L.P. appointed Matthew Kelly to the Board as part of a Preferred Investment.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of the Registrant. The information set forth under

Material Modifications to Rights of Security Holders. The information set forth in Items 1.01 and 5.03 of this Current Report on Form 8-K is incorporated herein by reference.

Completion of Acquisition or Disposition of Assets The information set forth in the Introductory Note and

Unregistered Sales of Equity Securities. The information contained in

Unregistered Sales of Equity Securities. On January 20, 2026, Infinity Natural Resources, Inc. (the “Company”) (solely for certain limited purposes) and Infinity Natural Resources, LLC entered into a purchase and sale agreement (the “Purchase Agreement”) with Chase Oil Corporation, a New Mexico corporation, and certain other sellers (each a “Seller” and, collectively, “Sellers”) for the acquisition of certain non-operated rights, title and interests in oil and gas properties, rights and relat…

Entry Into a Material Definitive Agreement. Upstream Purchase Agreement On December 5, 2025, Infinity Natural Resources, LLC (“INR Holdings”) and Northern Oil and Gas Inc. (“Northern” and, together with INR Holdings, the “Upstream Buyers”) entered into a purchase and sale agreement (the “Upstream Purchase Agreement”) with Antero Resources Corporation, a Delaware corporation, Antero Minerals LLC, a Delaware limited liability company and Monroe Pipeline LLC, a Delaware limited liability company…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under “

Results of Operations and Financial Condition. On November 10, 2025, Infinity Natural Resources, Inc. (the “Company”) issued a press release announcing its financial and operating results for the quarter ended September 30, 2025, as well as a $75 million share repurchase program. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated herein by reference. On November 10, 2025, the Company posted an investor presentation related to the financial and operating results f…

Results of Operations and Financial Condition. On August 11, 2025, Infinity Natural Resources, Inc. (the “Company”) issued a press release announcing its financial and operating results for the quarter ended June 30, 2025. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated herein by reference. On August 11, 2025, the Company posted an investor presentation related to the financial and operating results for the quarter ended June 30, 2025 to its website at ir.infi…