Effective October 27, 2023, Mach Natural Resources LP announced that Edgar R. Giesinger, Stephen Perich and Francis A. Keating II were appointed as members of the Board. Mr. Giesinger, Mr. Perich and Mr. Keating were each appointed as a member of the Board's Audit Committee and Conflicts Committee. Mr. Giesinger, Mr. Perich and William McMullen were each appointed as a member of the Board's Compensation Committee.

Mr. Giesinger will serve as the chair of the Board's Audit Committee and Mr. Perich will serve as the chair of the Board's Compensation Committee. There are no familial relationships of Mr. Giesinger, Mr. Perich or Mr. Keating that would require disclosure pursuant to Item 401(d) of Regulation S-K. There are no arrangements or understandings between Mr. Giesinger, Mr. Perich or Mr. Keating, respectively, and any other persons pursuant to which either Mr. Giesinger, Mr. Perich or Mr. Keating was selected as a director. Mr. Giesinger, Mr. Perich and Mr. Keating have not had any direct or indirect material interest in any transaction or series of similar transactions contemplated by Item 404(a) of Regulation S-K.