Mach Natural Resources LP Reports 2023 Results and Year-End Reserves OKLAHOMA CITY, Oklahoma, April 1, 2024 — Mach Natural Resources LP (NYSE: MNR) ("Mach" or the "Company") today reported financial and operating results for the year-ended December 31, 2023. In addition, the Company reaffirmed its guidance for 2024. Exhibit 99.1 Recent Highlights Tom L. Ward, Mach's Chief Executive Officer, noted, "2023 was a transformative year for Mach. We successfully completed the largest IPO for an E&P company since 20 ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______ to ______ Commission file number 001-41849 Mach Natural Resources LP (Exact name of registrant as specified in its charter) Delaw ...