| 1 | M & A Oil Company, LTD. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 2 | M & B Oil Company | Holliday, TX 76366 | Oil & Gas Operator | Sep 2025 |
| 3 | M & B Operating, LLC | Gonzales, TX 78629 | Oil Operator | Dec 2025 |
| 4 | M & C Operating, LLC | Poteet, TX 78065 | Oil Operator | Dec 2025 |
| 5 | M & D Oil & Gas | Levelland, TX 79336 | Oil & Gas Operator | Aug 2000 |
| 6 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | Dec 2025 |
| 7 | M & J Energy, Inc. | Breckenridge, CO 80424 | Oil & Gas Operator | Dec 2025 |
| 8 | M & J Production Company | Austwell, TX 77950 | Oil & Gas Operator | Jun 2020 |
| 9 | M & K Operating LLC | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 10 | M & M Construction Co. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 1996 |
| 11 | M & M General Contractors, Inc. | Big Spring, TX 79720 | Oil & Gas Operator | Dec 2025 |
| 12 | M & M Oil & Gas Exploration Inc | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 13 | M & M Oil Co., LLC | Oil City, LA 71061 | Oil & Gas Operator | Dec 2025 |
| 14 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Jun 2025 |
| 15 | M & M Production LTD. | Midland, TX 79704 | Oil & Gas Operator | Dec 2025 |
| 16 | M & M Resources Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 17 | M & R Exploration Company | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 18 | M & S Exploration | El Campo, TX 77437 | Oil & Gas Operator | Dec 2025 |
| 19 | M A S Operators | Kilgore, TX 75663 | Oil & Gas Operator | Jul 1999 |
| 20 | M E G G , Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 2003 |
| 21 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jun 2025 |
| 22 | M H W, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Jul 1996 |
| 23 | M IV Ops., Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 1998 |
| 24 | M R Ventures LLC | Dallas, TX 75367 | Oil & Gas Operator | Sep 2025 |
| 25 | M S B Company | Slaton, TX 79364 | Oil & Gas Operator | Dec 2016 |
| 26 | M T M Oil | Monahans, TX 79756 | Oil & Gas Operator | Dec 2025 |
| 27 | M W Production Co. | New Braunfels, TX 78130 | Oil & Gas Operator | Aug 2003 |
| 28 | M'Red Petroleum, LLC | Pampa, TX 79065 | Oil & Gas Operator | Dec 2010 |
| 29 | M-2 Oil Company | Wichita Falls, TX 76306 | Oil & Gas Operator | May 2006 |
| 30 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Dec 2025 |
| 31 | M-C Production & Drilling Co,Inc | Longview, TX 75608 | Oil & Gas Operator | Dec 2025 |
| 32 | M-Five Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Apr 2002 |
| 33 | M-G Gas Company, Inc. | Plano, TX 75086 | Oil & Gas Operator | Jun 1999 |
| 34 | M-J Oil Company Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 35 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 36 | M-Tex Resources, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Dec 2025 |
| 37 | M-V Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 38 | M-W-D Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jul 1999 |
| 39 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2025 |
| 40 | M. Grace, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Dec 2025 |
| 41 | M. J. G., Inc. | Alice, TX 78333 | Oil & Gas Operator | Jul 2010 |
| 42 | M. K. Production | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 43 | M. M. Miller & Sons, LTD. | Alice, TX 78333 | Oil & Gas Operator | Jan 2023 |
| 44 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 45 | M. S. Productions, Inc. | Pittsburg, KS 66762 | Oil & Gas Operator | Nov 2019 |
| 46 | M.A.R.S. Energy | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 47 | M.B. Properties, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 1995 |
| 48 | M.B.J. Operating | Argyle, TX 76226 | Oil & Gas Operator | Jun 2022 |
| 49 | M.D. Skroopka Operating, LLC | Oakland, CA 94611 | Oil & Gas Operator | Dec 2025 |
| 50 | M.J.O.G., Inc. | Fort Smith, AR 72903 | Oil Operator | Mar 2015 |
| 51 | M.R.M. Operating, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 2003 |
| 52 | M2 Squared Operating, LLC | Rockwall, TX 75032 | Oil Operator | Dec 2025 |
| 53 | M3V Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Dec 2025 |
| 54 | M5 Standing Energy, LLC | Decatur, TX 76234 | Oil & Gas Operator | Dec 2025 |
| 55 | M5oexit, LLC | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 56 | Mac 5 Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Feb 2021 |
| 57 | Mac Operating | Graham, TX 76450 | Oil & Gas Operator | Jun 2023 |
| 58 | Mace, T. A. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2008 |
| 59 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Dec 2025 |
| 60 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 61 | Macina, P.T. | Shamrock, TX 79079 | Gas Operator | Dec 2025 |
| 62 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Sep 2025 |
| 63 | Mack Energy Corporation | Artesia, NM 88211 | Oil & Gas Operator | Sep 2025 |
| 64 | Maclane Gas Company L.P. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Mar 1994 |
| 65 | Maddox Operating | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 66 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | Dec 2025 |
| 67 | Maddux, Elizabeth H. | San Antonio, TX 78217 | Oil & Gas Operator | Nov 1995 |
| 68 | Madera, R. F. | Palm Desert, CA 92210 | Oil & Gas Operator | Sep 2000 |
| 69 | Madison And Wright LLC | The Colony, TX 75056 | Oil & Gas Operator | Dec 2025 |
| 70 | Madison Oil Co.-Halbouty, M. T. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 71 | Madison Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 72 | Maersk Energy Inc. | Houston, TX 77042 | Oil & Gas Operator | Oct 1994 |
| 73 | Maertins Production, LLC | Queen City, TX 75572 | Oil Operator | Dec 2025 |
| 74 | Magellan E&P Holdings, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2021 |
| 75 | Maggert Energy Corp. | Spring, TX 77387 | Gas Operator | Jun 1998 |
| 76 | Magic Circle Energy | Oklahoma City, OK 73185 | Oil & Gas Operator | Dec 1983 |
| 77 | Magic City Oil & Gas | Amarillo, TX 79109 | Oil & Gas Operator | Dec 2025 |
| 78 | Magic Oil & Gas Inc. | Houston, TX 77079 | Oil & Gas Operator | Jan 2001 |
| 79 | Magna Diversified Group, Inc. | Jacksonville, TX 75766 | Oil & Gas Operator | Oct 2013 |
| 80 | Magna Oil & Gas Corporation | Irving, TX 75017 | Oil & Gas Operator | Feb 2016 |
| 81 | Magna Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 82 | Magnatex Corp | Midland, TX 79702-1311 | Oil & Gas Operator | Feb 1995 |
| 83 | Magnet Oil LP | Bronte, TX 76933 | Oil & Gas Operator | Dec 2025 |
| 84 | Magnolia Oil & Gas Operating LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 85 | Magnolia Production Co | Atlanta, TX 75551 | Oil & Gas Operator | Dec 2025 |
| 86 | Magnum Energy Inc | Norman, OK 73072-2403 | Oil & Gas Operator | Aug 2025 |
| 87 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 88 | Magnum Hunter Production, Inc. | Irving, TX 75014 | Oil & Gas Operator | Dec 2019 |
| 89 | Magnum Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2000 |
| 90 | Magnum Oilfield Services LLC | Bakersfield, CA 93309 | Oil Operator | Dec 2025 |
| 91 | Magnum Operating, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 92 | Magnum Petroleum, Inc. | Palm Desert, CA 92260 | Oil & Gas Operator | Nov 2013 |
| 93 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 94 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 95 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2025 |
| 96 | Magruder '81, LTD. | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 97 | Magruder, Edwin H., Jr. | Midland, TX 79701 | Oil & Gas Operator | Oct 2019 |
| 98 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 99 | Mahfouz Energy Company | Houston, TX 77255 | Oil & Gas Operator | Nov 2020 |
| 100 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |