| 19801 | Mosbacher Production Co. | Houston, TX 77001 | Oil & Gas Operator | Aug 1984 |
| 19802 | Mosbacher, Robert-Pruet, Chesley | | Oil & Gas Operator | Dec 1983 |
| 19803 | Moseley Petroleum Corp. | | Oil & Gas Operator | Apr 1988 |
| 19804 | Moseley, J. T. | Temple, TX 76502 | Oil & Gas Operator | Sep 2008 |
| 19805 | Moses Gas, Inc. | Indore, WV 25111-0100 | Gas Operator | Dec 2018 |
| 19806 | Moses, Tom | Beaumont, TX 77702 | Oil Operator | Oct 2025 |
| 19807 | Mosher Gas, LLC | Knoxville, PA 16928 | Gas Operator | Dec 2024 |
| 19808 | Moskowitz Charles J | | Oil Operator | Feb 2014 |
| 19809 | Moskowitz Oil & Gas LLC | | Oil Operator | Jul 2025 |
| 19810 | Mosley Oil &Gas Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 19811 | Mosman Operating, LLC | Dallas, TX 75204 | Oil Operator | Oct 2025 |
| 19812 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Oct 2025 |
| 19813 | Moss Properties Inc | | Oil & Gas Operator | Mar 1986 |
| 19814 | Moss SWD, LLC | Andrews, TX 79714 | Oil Operator | Oct 2025 |
| 19815 | Moss Ted A Operating Company | Oklahoma City, OK 73126-0187 | Oil & Gas Operator | Jun 1997 |
| 19816 | Moss William Properties Inc | Dallas, TX 75219 | Oil & Gas Operator | Apr 2014 |
| 19817 | Moss, William Corp. | Dallas, TX 75219 | Oil & Gas Operator | Oct 2002 |
| 19818 | Mossholder Drilling Co | Newark, OH 43055 | Oil Operator | Dec 1990 |
| 19819 | Mossholder Linda Dba | Newark, OH 43055 | Oil & Gas Operator | Dec 2015 |
| 19820 | Mossor, Kenneth Everett | Ellenboro, WV 26346-0057 | Oil & Gas Operator | Dec 2021 |
| 19821 | Mossor, L. E. | Harrisville, WV 26362-0000 | Oil & Gas Operator | Dec 2002 |
| 19822 | Mosthaf Edwin C And Mosthaf Levina M | | Oil Operator | Jul 2020 |
| 19823 | Mote Resources, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2004 |
| 19824 | Mott Energy LLC | Riverview, FL 33569-6702 | Oil & Gas Operator | Sep 2024 |
| 19825 | Mott Oil & Gas | Sugarland, TX 77478 | Oil & Gas Operator | May 2001 |
| 19826 | Mott Petroleum Corporation | Sugar Land, TX 77487 | Oil & Gas Operator | Aug 2024 |
| 19827 | Motto Energy Inc. | Normantown, WV 25267-8215 | Oil & Gas Operator | Dec 2021 |
| 19828 | Mount Chestnut Dev LLC | Butler, PA 16002-3940 | Gas Operator | Dec 2017 |
| 19829 | Mount Richard | Newark, OH 43055 | Oil Operator | Dec 2005 |
| 19830 | Mount, Thomas | North East, PA 16428 | Gas Operator | Dec 2024 |
| 19831 | Mountain Creek Energy Inc | Georgetown, TX 78633 | Oil & Gas Operator | Jun 2025 |
| 19832 | Mountain Creek Oil Company, Inc. | Saint Jo, TX 76265 | Oil & Gas Operator | Oct 2025 |
| 19833 | Mountain Divide, LLC | | Oil & Gas Operator | Mar 2017 |
| 19834 | Mountain DRLG, Inc | Hindman, KY 41822 | Oil & Gas Operator | Dec 2023 |
| 19835 | Mountain Fuel Supply Co | Salt Lake City, UT 84139 | Oil & Gas Operator | May 1984 |
| 19836 | Mountain Hawk Energy LLC | Athens, TX 75751 | Gas Operator | Jan 2015 |
| 19837 | Mountain Oil And Gas Inc | Roosevelt, UT 84066 | Oil & Gas Operator | Jul 2025 |
| 19838 | Mountain Pacific General Inc. | Cut Bank, MT 59427 | Oil & Gas Operator | Jun 2022 |
| 19839 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 19840 | Mountain Resource Corporation | Salt Lake City, UT 84124 | Oil & Gas Operator | Dec 1988 |
| 19841 | Mountain State Oil Company, L..L.C. | Pennsboro, WV 26415-0014 | Oil & Gas Operator | Dec 2021 |
| 19842 | Mountain State Well Tending | Hurricane, WV 25526-0000 | Oil & Gas Operator | Dec 2021 |
| 19843 | Mountain States Petroleum Corp | Midland, TX 79702 | Oil & Gas Operator | Apr 2008 |
| 19844 | Mountain States Resources Inc | Cut Bank, MT 59427 | Oil & Gas Operator | Oct 2000 |
| 19845 | Mountain V Oil & Gas, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 19846 | Mountain V, LLC | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 19847 | Mountain VIew Resources LLC | | Oil & Gas Operator | Aug 2025 |
| 19848 | Mountaineer Gas Transmission, Inc. | Fort Worth, TX 76185-0000 | Oil & Gas Operator | Dec 2021 |
| 19849 | Mountaineer State Energy, Inc. | Dallas, TX 75234 | Oil & Gas Operator | Dec 2021 |
| 19850 | Mountaineer State Operations, LLC | Sandyville, WV 25275 | Oil & Gas Operator | Dec 2024 |
| 19851 | Mountaineer Trading Company, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2016 |
| 19852 | Mourning James & Carol | Middleport, OH 45760-1214 | Gas Operator | Dec 2024 |
| 19853 | Mowata Oil Company | Victoria, TX 77903 | Oil & Gas Operator | Oct 1996 |
| 19854 | Mowdy Robert F | Coalgate, OK 74538 | Oil & Gas Operator | May 2001 |
| 19855 | Moxy Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Aug 2003 |
| 19856 | Moy, Gary | Falls City, TX 78113 | Oil & Gas Operator | Nov 1998 |
| 19857 | Moylan, Jimmie C. | Eastland, TX 76448 | Oil & Gas Operator | Oct 2025 |
| 19858 | Moylan, Thomas F. | Lacygne, KS 66040 | Oil & Gas Operator | Dec 1993 |
| 19859 | Mozark Corporation | Spring, TX 77379-8049 | Oil & Gas Operator | Jan 2011 |
| 19860 | Moze Inc | Ochelata, OK 74051 | Oil & Gas Operator | Jan 2001 |
| 19861 | MPG Petroleum | San Antonio, TX 78217 | Oil & Gas Operator | Aug 2003 |
| 19862 | MPG Petroleum, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 19863 | Mr NM Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Aug 2025 |
| 19864 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 19865 | MRD Nowata LLC | Woodstock, GA 30189 | Oil Operator | Aug 2017 |
| 19866 | MRD Operating LLC | | Oil & Gas Operator | Dec 2016 |
| 19867 | MRD Operating LLC (Delaware) | Houston, TX 77010 | Oil & Gas Operator | Jul 2015 |
| 19868 | Mri Ventures, Inc. | | Oil Operator | Dec 1993 |
| 19869 | Mroz Baier, Christine | Memphis, TN 38120 | Gas Operator | Dec 2024 |
| 19870 | MRR Oil Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2002 |
| 19871 | Mrs. C. M. Roberson | | Oil Operator | Mar 1989 |
| 19872 | Mrs. Cecile Andries & Sons | | Oil Operator | Dec 2006 |
| 19873 | Mrs. Clara B. Guthrie | | Gas Operator | Jun 1996 |
| 19874 | MRT Exploration Co | | Oil & Gas Operator | Feb 1983 |
| 19875 | MS Producing LLC | Creston, OH 44217 | Oil & Gas Operator | Dec 2024 |
| 19876 | MS United, LLC | | Oil & Gas Operator | Apr 2025 |
| 19877 | MSB Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 19878 | MSB Operating Company | Enid, OK 73703 | Oil & Gas Operator | Jan 2005 |
| 19879 | MSD Energy, Inc | Rapid City, SD 57702 | Oil & Gas Operator | Dec 2020 |
| 19880 | MSD Operating, LLC | Big Spring, TX 79721 | Oil & Gas Operator | Oct 2025 |
| 19881 | Mse Operating Corp. | Beaverton, OR 97008 | Oil & Gas Operator | Oct 2025 |
| 19882 | MSG Resources Inc. | Iola, KS 66749 | Oil Operator | Jun 2025 |
| 19883 | MSL Oil & Gas Corp | Bradford, PA 16701-0151 | Oil & Gas Operator | Dec 2024 |
| 19884 | MSN Oil, Inc. | Avoca, TX 79503 | Oil Operator | Oct 2025 |
| 19885 | MSR Exploration, Inc. | Winters, TX 79567 | Oil & Gas Operator | Mar 2000 |
| 19886 | MSSK Consulting LLC | San Antonio, TX 78253 | Oil Operator | Oct 2025 |
| 19887 | MT Dora Energy Corporation | Duncan, OK 73533-1829 | Oil & Gas Operator | Apr 2014 |
| 19888 | MT Dora Energy LLC | Houston, OK 77056-1940 | Oil & Gas Operator | Jun 2019 |
| 19889 | MT Energy LLC | Waskom, TX 75692 | Oil & Gas Operator | Oct 2025 |
| 19890 | MT Savage Refractories | Pittsburgh, PA 15206-0171 | Gas Operator | Dec 2021 |
| 19891 | MT. Crescent Operating Company, LLC | | Oil & Gas Operator | Jul 2025 |
| 19892 | MTBB Acquisition Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2022 |
| 19893 | MTG Operating Inc | Ridgeland, MS 39158 | Gas Operator | Apr 2011 |
| 19894 | MTM Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Jun 2025 |
| 19895 | MTN Energy | Aleppo, PA 15310 | Oil & Gas Operator | Jul 2025 |
| 19896 | MTN V Oil & Gas Inc | Indiana, PA 15701-8914 | Oil & Gas Operator | Dec 2024 |
| 19897 | Mto Oil Company | Okay, OK 74446-0354 | Oil Operator | Jul 2019 |
| 19898 | Muckleroy Gas | San Antonio, TX 78247 | Gas Operator | Oct 2025 |
| 19899 | Mud Creek Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Oct 2025 |
| 19900 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Jul 2025 |