Form: 10-K

Annual report [Section 13 and 15(d), not S-K Item 405]

March 12, 2026

Exhibit 21.1

SUBSIDIARIES OF MACH NATURAL RESOURCES LP


Name of Subsidiary
Jurisdiction of Organization
Mach Natural Resources Intermediate LLCDelaware
Mach Natural Resources Holdco LLCDelaware
BCE-Mach LLCDelaware
BCE-Mach II LLCDelaware
BCE-Mach III LLCDelaware
BCE-Mach III Midstream Holdings LLCDelaware
Simcoe LLCDelaware
Simlog LLCDelaware
SJ Investment Opps LLCDelaware
Ringwood Gathering Company, LLCDelaware
Timberland Gathering & Processing Company, LLCDelaware