Mach Natural Resources LP (NYSE: MNR) (“Mach” or the “Company”) today announced that the Company’s 2023 Schedule K-3s, reflecting items of international tax relevance, are now available online. Unitholders requiring this information may access their Schedule K-3 online at www.taxpackagesupport.com/mnr.

A limited number of Mach investors—primarily foreign unitholders, those computing a foreign tax credit on their tax return and certain corporate and/or partnership unitholders—may need the detailed information disclosed on Schedule K-3 for specific reporting requirements. To the extent a Schedule K-3 is applicable to their federal income tax return filing needs, unitholders are encouraged to review the tax information contained on the form and refer to the appropriate federal laws or consult with their tax advisor.

The Company does not expect to mail the Schedule K-3 to investors. To receive an electronic copy of their Schedule K-3, Mach Natural Resources LP unitholders owning Mach Natural Resources LP Common Units in 2023 may call 833-609-4029 toll free for K-3 tax package support. Tax Package Support is available on weekdays between 8 a.m. Central Time and 5 p.m. Central Time.

About Mach Natural Resources LP

Mach Natural Resources LP is an independent upstream oil and gas Company focused on the acquisition, development and production of oil, natural gas and NGL reserves in the Anadarko Basin region of Western Oklahoma, Southern Kansas and the panhandle of Texas. For more information, please visit www.machnr.com.

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