X0609 4 2026-04-08 1 0001980088 MACH NATURAL RESOURCES LP MNR 0000949615 KAYNE ANDERSON CAPITAL ADVISORS LP false 2121 AVENUE OF THE STARS 9TH FLOOR LOS ANGELES CA 90067 0 0 0 1 Former 10% Owner 0002083178 Sabinal Energy Operating, LLC false 717 TEXAS AVENUE, SUITE 2200 HOUSTON TX 77002 0 0 0 1 Former 10% Owner 0 Common Units 2026-04-08 4 J 0 3442321 12.81 D 15517713 I Sabinal Energy Operating, LLC On April 6, 2026, Mach Natural Resources LP (the "Company") entered into an underwriting agreement (the "Underwriting Agreement"), by and among the Company, Mach Natural Resources GP LLC, the general partner of the Company, the selling unitholders party thereto (the "Selling Unitholders", of which Sabinal Energy Operating, LLC is one) and Morgan Stanley & Co. LLC (the "Underwriter"), pursuant to which the Selling Unitholders agreed to sell to the Underwriter, and the Underwriter agreed to purchase from the Selling Unitholders, an aggregate of 9,000,000 common units representing limited partner interests ("Common Units") in the Company (such offering, the "Offering"). The reported units are held by Sabinal Energy Operating, LLC, a portfolio company of a private investment fund managed by Kayne Anderson Capital Advisors, L.P. /s/ Michael O'Neil 2026-04-08 /s/ Oren Marouni 2026-04-08