| 1 | MADDOX | Tarrant County, TX | Gas Property | Jan 2025 |
| 2 | MADDOX-BADGER | Tarrant County, TX | Gas Property | Jan 2025 |
| 3 | MAHAFFEY UNIT | Tarrant County, TX | Gas Property | Dec 2008 |
| 4 | MAHVASH UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 5 | MALLICK UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 6 | MANNING TRWD | Tarrant County, TX | Oil & Gas Property | Oct 2024 |
| 7 | MANSFIELD | Tarrant County, TX | Gas Property | Jan 2025 |
| 8 | MANSFIELD PARTNERS | Tarrant County, TX | Gas Property | Jan 2025 |
| 9 | MANSFIELD SPORTS COMPLEX UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 10 | MAPLE TREE | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 11 | MAPLE TREE SOUTH UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 12 | MARINE CREEK | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 13 | MARINE CREEK OF TEXAS | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 14 | MARTIN | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 15 | MARTIN-FOREST HILLS | Tarrant County, TX | Gas Property | Jan 2025 |
| 16 | MASTODON | Tarrant County, TX | Gas Property | Jan 2025 |
| 17 | MATHIS COAL CAR | Tarrant County, TX | Gas Property | Jan 2025 |
| 18 | MATLOCK | Tarrant County, TX | Gas Property | Jan 2025 |
| 19 | MAVERICK 1H | Tarrant County, TX | Gas Property | Jan 2025 |
| 20 | MAYFAIR | Tarrant County, TX | Gas Property | Jul 2019 |
| 21 | MAYFLOWER | Tarrant County, TX | Gas Property | Jan 2025 |
| 22 | MB A UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 23 | MB B UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 24 | MCCULLAR | Tarrant County, TX | Gas Property | Jan 2025 |
| 25 | MCCULLAR RUDDER BOXER MIPA 2H | Tarrant County, TX | Gas Property | Jan 2025 |
| 26 | MCCULLEY | Tarrant County, TX | Gas Property | Jan 2025 |
| 27 | MCDANIEL | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 28 | MCKINNEY WILLIAM | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 29 | MCMAHON | Tarrant County, TX | Gas Property | Jan 2025 |
| 30 | MEACHAM | Tarrant County, TX | Gas Property | Jan 2025 |
| 31 | MEACHAM NORTH UNIT Q | Tarrant County, TX | Gas Property | Jan 2025 |
| 32 | MEACHAM SOUTH UNIT B | Tarrant County, TX | Gas Property | Jan 2025 |
| 33 | MEEKINS-MAYS | Tarrant County, TX | Gas Property | Jan 2025 |
| 34 | MEGALODON 1H | Tarrant County, TX | Gas Property | Jan 2025 |
| 35 | MERCADO | Tarrant County, TX | Gas Property | Jan 2025 |
| 36 | MERCANTILE | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 37 | MERCER RANCH | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 38 | MEREKEN | Tarrant County, TX | Gas Property | Jan 2025 |
| 39 | MILNE CARROLL UNIT A | Tarrant County, TX | Gas Property | Jan 2025 |
| 40 | MINERALS W.S | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 41 | MIRA LAGOS | Tarrant County, TX | Gas Property | Jan 2025 |
| 42 | MIRA VISTA UNIT A | Tarrant County, TX | Gas Property | Jan 2025 |
| 43 | MIRA VISTA UNIT C | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 44 | MISSION | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 45 | MITCHELL | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 46 | MITCHELL BNM 1H | Tarrant County, TX | Gas Property | Jan 2025 |
| 47 | MITX-CENTEX UNIT 1 1H | Tarrant County, TX | Gas Property | Jan 2025 |
| 48 | MOHO | Tarrant County, TX | Gas Property | Jan 2025 |
| 49 | MOORE | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 50 | MORITZ | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 51 | MORROW/STEVENS | Tarrant County, TX | Gas Property | Jan 2025 |
| 52 | MORTIMER | Tarrant County, TX | Gas Property | Jan 2025 |
| 53 | MOSS | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 54 | MOUNT TABOR | Tarrant County, TX | Gas Property | Jan 2025 |
| 55 | MOUNT TABOR BRAYLON MIPA UNIT 3H | Tarrant County, TX | Gas Property | Jan 2025 |
| 56 | MOUSER UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 57 | MS SOUTH | Tarrant County, TX | Gas Property | Jan 2025 |
| 58 | MS WEST | Tarrant County, TX | Gas Property | Jan 2025 |
| 59 | MT ACE UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 60 | MT BIRDIE UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 61 | MT. OLIVET | Tarrant County, TX | Gas Property | Apr 2023 |
| 62 | MULLIGAN | Tarrant County, TX | Gas Property | Jan 2025 |
| 63 | MURRIN BEAR CREEK | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 64 | MUSTANG 1H | Tarrant County, TX | Gas Property | Jan 2025 |