| 18701 | MHM Oil Co. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2002 |
| 18702 | MHM Pipeline Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Sep 2024 |
| 18703 | Mi-Co Oil & Gas LLC | Caddo, TX 76429 | Oil Operator | Sep 2024 |
| 18704 | Miami Oil Producers Inc | Reno, NV 89501 | Oil & Gas Operator | Dec 2012 |
| 18705 | Mica Energy Corp. | Lincoln, NE 68516 | Oil & Gas Operator | Dec 2010 |
| 18706 | Mich Geosearch/Eagle O&G | Wichita Falls, TX 76308-1061-1061 | Oil & Gas Operator | Dec 2001 |
| 18707 | Mich-La Oil & Gas Exploration | | Oil & Gas Operator | Jan 1992 |
| 18708 | Michael D Brown | | Oil Operator | Jul 1993 |
| 18709 | Michael D. Traylor LLC | El Dorado, KS 67042 | Oil Operator | May 2024 |
| 18710 | Michael D. Weilert Oil Company | | Oil Operator | May 2024 |
| 18711 | Michael Goodnight Operating LLC | St Louis, OK 74866 | Oil & Gas Operator | Jun 2024 |
| 18712 | Michael Petr. & Hurd Ent., LTD. | Houston, TX 77056 | Oil & Gas Operator | Oct 1993 |
| 18713 | Michael Petroleum Corporation | Houston, TX 77040 | Oil & Gas Operator | Dec 2001 |
| 18714 | Michael W Mills | | Oil Operator | Jul 2007 |
| 18715 | Michaelis Leo Oi | | Oil Operator | Aug 1991 |
| 18716 | Michaels, Bobby W | | Oil Operator | Nov 1998 |
| 18717 | Michaelson Producing Company | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2024 |
| 18718 | Michel T. Halbouty | | Oil & Gas Operator | Dec 1996 |
| 18719 | Michel T. Halbouty Energy Co. | | Oil & Gas Operator | Nov 1986 |
| 18720 | Michigan Gas Utilities Co | | Oil & Gas Operator | Mar 2011 |
| 18721 | Michigan Geosearch Inc | Lansing, MI 48917 | Oil & Gas Operator | Jun 2024 |
| 18722 | Michigan Oil Co. | FT Worth, TX 76117 | Oil & Gas Operator | Feb 1998 |
| 18723 | Michigan Petroleum Exploration Inc | | Oil & Gas Operator | Oct 2005 |
| 18724 | Michigan Production Co LLC | | Oil & Gas Operator | Oct 2002 |
| 18725 | Michigan-Wisconsin Pipe Line Co | | Oil & Gas Operator | Dec 1983 |
| 18726 | Mickalson Operating Company | Cleveland, OK 74020 | Oil & Gas Operator | Jul 2024 |
| 18727 | Mickalson Petroleum Company | | Oil & Gas Operator | Mar 1993 |
| 18728 | Mico Oil & Gas | Paola, KS 66071 | Oil Operator | Aug 1995 |
| 18729 | Micro Oil, LLC | Casa Grande, AZ 85193 | Oil Operator | May 2024 |
| 18730 | Micro Operating, Inc. | Bryan, TX 77807 | Oil & Gas Operator | Sep 2024 |
| 18731 | Micron Minerals Company | | Oil & Gas Operator | Sep 1988 |
| 18732 | Mid Amer Natural Resources Inc | Erie, PA 16505-4760 | Gas Operator | Dec 1994 |
| 18733 | Mid America Ener | | Oil Operator | Nov 1993 |
| 18734 | Mid Atlantic Oil Co | Hillsdale, MI 49242 | Oil & Gas Operator | Dec 1999 |
| 18735 | Mid Center Oil Company | | Oil & Gas Operator | Mar 2014 |
| 18736 | Mid Central Production LLC | Evanston, WY 82930 | Oil Operator | Jun 2024 |
| 18737 | Mid Con Energy Corporation | Fort Scott, KS 66701 | Oil Operator | Dec 2009 |
| 18738 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Sep 2024 |
| 18739 | Mid East Oil Co | Indiana, PA 15701-5378 | Gas Operator | Dec 2006 |
| 18740 | Mid Field Oil Co. | | Oil & Gas Operator | Mar 1989 |
| 18741 | Mid Gulf Incorpo | | Oil & Gas Operator | Nov 1993 |
| 18742 | Mid Kansas Explo | | Oil Operator | Apr 1994 |
| 18743 | Mid Kansas Gas Gathering | | Gas Operator | May 2024 |
| 18744 | Mid Louisiana Gas Company | | Oil & Gas Operator | Oct 2002 |
| 18745 | Mid Michigan Gas Storage Co | | Oil & Gas Operator | Mar 2022 |
| 18746 | Mid South Oil & Gas Expl Inc | | Oil & Gas Operator | Jan 1992 |
| 18747 | Mid States Energ | | Oil Operator | Aug 1985 |
| 18748 | Mid States Gener | | Oil Operator | Apr 1988 |
| 18749 | Mid Texas Natural Gas | Kyle, TX 78640 | Oil & Gas Operator | May 2019 |
| 18750 | Mid Western Oil | | Oil Operator | Oct 1989 |
| 18751 | Mid-America Energy Company, Inc. | Lebanon, MO 65536 | Oil Operator | Jul 2003 |
| 18752 | Mid-America Resources Corporation | | Oil Operator | Jan 2019 |
| 18753 | Mid-America Resources, Inc. | | Oil & Gas Operator | Feb 2008 |
| 18754 | Mid-America/Hughes & Hughes | | Oil Operator | Jul 1984 |
| 18755 | Mid-American Hyd | | Oil & Gas Operator | Jan 1992 |
| 18756 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 18757 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 18758 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2024 |
| 18759 | Mid-Con Gas Corp | Yukon, OK 73099 | Oil & Gas Operator | Feb 2014 |
| 18760 | Mid-Con Petroleum Co Inc | Heath, OH 43056 | Oil & Gas Operator | Dec 2010 |
| 18761 | Mid-Continent En | | Oil & Gas Operator | Nov 1995 |
| 18762 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | May 2024 |
| 18763 | Mid-Continent Energy Operating | | Gas Operator | Aug 2007 |
| 18764 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2024 |
| 18765 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 18766 | Mid-Continent Petroleum Corp | | Oil & Gas Operator | Mar 2017 |
| 18767 | Mid-Continent Petroleum Management Inc | Cement, OK 73017 | Oil & Gas Operator | Jul 2024 |
| 18768 | Mid-Continent Re | | Oil & Gas Operator | Jan 1993 |
| 18769 | Mid-Continental Exploration,Inc. | Sanger, TX 76266 | Oil & Gas Operator | Sep 2024 |
| 18770 | Mid-Eastern Oil & Gas Co. | Burton, WV 26562-0000 | Oil & Gas Operator | Dec 2021 |
| 18771 | Mid-Gulf, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Mar 2008 |
| 18772 | Mid-National Resources Inc. | | Oil Operator | Feb 1999 |
| 18773 | Mid-Penn Energy Corporation | Harrisburg, PA 17101-1002 | Gas Operator | Dec 2021 |
| 18774 | Mid-South Trading, Inc. | | Oil & Gas Operator | Jan 2024 |
| 18775 | Mid-States Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2024 |
| 18776 | Mid-Tex Energy Inc. | Costa Mesa, CA 92626 | Oil & Gas Operator | Jan 1999 |
| 18777 | Mid-Tex Operating, Inc. | Austin, TX 78748 | Oil & Gas Operator | Sep 2024 |
| 18778 | Mid-Tex Resources | Merkel, TX 79536 | Oil & Gas Operator | Feb 2001 |
| 18779 | Mid-Way Environmental Services Inc | Stroud, OK 74079 | Oil Operator | Feb 2022 |
| 18780 | Midas Resources, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 2024 |
| 18781 | Midco Energy, Inc. | | Oil & Gas Operator | Dec 1992 |
| 18782 | Midco Exploration, Inc. | Westmont, IL 60559 | Oil & Gas Operator | May 2024 |
| 18783 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2024 |
| 18784 | Midcoast Resources Co | Tulsa, OK 74136 | Oil & Gas Operator | Dec 1992 |
| 18785 | Midcon Offshore, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 18786 | Midcontinent Acquisition Properties, Inc. | Oklahoma City, OK 73102 | Gas Operator | Jan 2000 |
| 18787 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 18788 | Middle Bay Oil Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 18789 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 18790 | Middle Fork Energy Uinta, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2024 |
| 18791 | Middleton Oil Company | Houston, TX 77006 | Oil & Gas Operator | Sep 2024 |
| 18792 | Mideast Gas Systems, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2005 |
| 18793 | Midenergy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2024 |
| 18794 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 18795 | Midkiff, John | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 18796 | Midla, LTD. | | Oil & Gas Operator | Jun 1990 |
| 18797 | Midland Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2024 |
| 18798 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Sep 2024 |
| 18799 | Midland Oil Co | Brownsville, OH 43721 | Oil & Gas Operator | Dec 2000 |
| 18800 | Midland Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2024 |