| 18601 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 18602 | Medina Res Dev Co LLC | Cambridge Springs, PA 16403-3447 | Oil & Gas Operator | Sep 2024 |
| 18603 | Medina-Pierce Oil & Gas Co | | Oil & Gas Operator | Feb 2012 |
| 18604 | Medlen, Dean S. | Rantoul, KS 66079 | Oil Operator | Aug 1993 |
| 18605 | Medora Minerals, LLC | | Oil & Gas Operator | Sep 2024 |
| 18606 | Meeder, Curt N. | Ripley, NY 14775 | Gas Operator | Dec 2023 |
| 18607 | Meek Joe E | | Oil Operator | Jul 2010 |
| 18608 | Meeker & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |
| 18609 | Meeker, Dan Management, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 2007 |
| 18610 | Meeks, Mike | El Dorado, AR 71730 | Oil Operator | Jul 2024 |
| 18611 | Meerkat Logistics And Operations LLC | Tuscaloosa, AL 35401 | Oil Operator | Sep 2024 |
| 18612 | Mega Drilling Company | | Oil Operator | Feb 1984 |
| 18613 | Mega Energy LLC | Gillette, WY 82718 | Gas Operator | Sep 2024 |
| 18614 | Mega Natural Gas Co | Tulsa, OK 74133 | Oil & Gas Operator | Jul 1996 |
| 18615 | Mega Petroleum C | | Oil Operator | Jun 1990 |
| 18616 | Mega Resources Inc | Dallas, TX 75225-0186 | Oil & Gas Operator | Jan 2001 |
| 18617 | Megadon Enterprises, Inc | Salt Lake City, UT 84121 | Oil Operator | Sep 2019 |
| 18618 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 18619 | Megan Oil & Gas Co., Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 18620 | Megas Corp | North Ridgevill, OH 44039 | Oil & Gas Operator | Dec 1984 |
| 18621 | Megg, L.P. | Borger, TX 79007 | Oil & Gas Operator | Nov 2024 |
| 18622 | Mego Resources, LLC | Taft, TX 78390 | Oil & Gas Operator | Nov 2024 |
| 18623 | Mehaffey Investments, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Nov 2024 |
| 18624 | Mei Operating Company | Lafayette, LA 70598 | Oil & Gas Operator | Aug 1997 |
| 18625 | Meier Joe Oil Op | | Oil Operator | Jul 1983 |
| 18626 | Mel Cox Transports Inc | Comanche, OK 73529-7640 | Oil & Gas Operator | Jul 2022 |
| 18627 | Mel-Ray Oil Company | Nowata, OK 74048-0149 | Oil & Gas Operator | Mar 2004 |
| 18628 | Melanie Oil Dril USA Inc | Millersburg, OH 44654 | Oil & Gas Operator | Dec 1989 |
| 18629 | Melcar Production | Tuscola, TX 79562 | Oil & Gas Operator | Nov 2024 |
| 18630 | Meleen, Catherine M. & Ruch, Jerry E. | Westfield, NY 14787 | Gas Operator | Dec 2023 |
| 18631 | Melland Drilling | | Oil Operator | Nov 1992 |
| 18632 | Mellenco Inc | Scottsdale, AZ 85253 | Oil & Gas Operator | Dec 1990 |
| 18633 | Mello-Dy Resources, LLC | Devine, TX 78016 | Oil Operator | Nov 2024 |
| 18634 | Mellon Creek Operating Co. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1993 |
| 18635 | Mellon Oil Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 18636 | Melren Oil & Gas Expl., Inc. | | Gas Operator | Dec 1989 |
| 18637 | Melrose Group In | | Oil Operator | Feb 1994 |
| 18638 | Melrose Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2011 |
| 18639 | Mels Water Service Inc | Lysite, WY 82642 | Oil Operator | Mar 2013 |
| 18640 | Melson Oil & Gas Inc | Broken Arrow, OK 74014 | Oil & Gas Operator | Sep 2024 |
| 18641 | Melton Operating Co. | Friendswood, TX 77546 | Oil & Gas Operator | Jul 2005 |
| 18642 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 18643 | Melton, Kenneth | Wann, OK 74083 | Oil Operator | Jun 2024 |
| 18644 | Meltzer Oil Comp | | Oil Operator | Dec 1983 |
| 18645 | Melvin Or Kathleen Turnbow | Portales, NM 88130 | Oil & Gas Operator | Mar 2006 |
| 18646 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 18647 | Mem Partnership LP, A General Partnership | Spring, TX 77393 | Oil Operator | Jul 2024 |
| 18648 | Memaca Petroleum Corporation | | Oil & Gas Operator | Jan 1990 |
| 18649 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 18650 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 18651 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 18652 | Mendell Davis Gas Partners LLC | | Oil & Gas Operator | Dec 2013 |
| 18653 | Mendell Finisterre II LLC | | Oil & Gas Operator | Jun 2017 |
| 18654 | Mendell Niobrara LLC | | Oil & Gas Operator | Apr 2017 |
| 18655 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 18656 | Meng Oper. & Expl. Co. | | Oil & Gas Operator | Dec 1989 |
| 18657 | Meng, Charles H | Lexington, KY 40502 | Gas Operator | Dec 2022 |
| 18658 | Menoah Petroleum Inc | | Oil & Gas Operator | Jun 2024 |
| 18659 | Mentren Corporation | | Gas Operator | Sep 2024 |
| 18660 | Mep Operating LLC | Houston, TX 77056-2733 | Oil & Gas Operator | Aug 2024 |
| 18661 | Mer Resources | Edmond, OK 73013 | Oil & Gas Operator | Nov 2024 |
| 18662 | Mer Resources Inc | Edmond, OK 73013-7662 | Oil & Gas Operator | Mar 2015 |
| 18663 | Mercantile Oil & Gas Prod. Corp. | Galena Park, TX 77547 | Oil & Gas Operator | Jun 2016 |
| 18664 | Mercer Oil & Gas Co. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 18665 | Mercer Oil Co | Stratford, OK 74872-7426 | Oil & Gas Operator | Aug 2024 |
| 18666 | Mercer Pet Management Inc | Edmond, OK 73013-6677 | Oil & Gas Operator | Jan 2011 |
| 18667 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 18668 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Nov 2024 |
| 18669 | Mercury Petroleum Company, Inc | | Oil Operator | Dec 2018 |
| 18670 | Mercury Resources LLC | | Oil & Gas Operator | Sep 2024 |
| 18671 | Meredith Enterprises | | Oil Operator | Jun 1988 |
| 18672 | Mereken Energy Corp. | Fort Worth, TX 76102 | Gas Operator | Feb 2006 |
| 18673 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 18674 | Merenco | Midland, TX 79702 | Oil & Gas Operator | Dec 1996 |
| 18675 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 18676 | Merica Oil Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Sep 2024 |
| 18677 | Meridian Energy Company | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2010 |
| 18678 | Meridian Energy Inc. | | Oil Operator | Jul 2024 |
| 18679 | Meridian Exploration Inc | Oklahoma City, OK 73128 | Oil & Gas Operator | Aug 2013 |
| 18680 | Meridian Exploration Corp. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2021 |
| 18681 | Meridian Interests, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Aug 2003 |
| 18682 | Meridian Oil & Gas Enter | Blairsville, PA 15717-0337-0337 | Oil & Gas Operator | Dec 2004 |
| 18683 | Meridian Oil & Gas Enterprises Inc | Blairsville, PA 15717-0337 | Oil & Gas Operator | Dec 2003 |
| 18684 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 18685 | Meridian Oil Inc.-Midland | Midland, TX 79702 | Oil & Gas Operator | Jul 1996 |
| 18686 | Meridian Oil Offshore Inc. | | Oil & Gas Operator | Aug 1996 |
| 18687 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 18688 | Meridian Production Services LLC | | Oil & Gas Operator | Aug 2024 |
| 18689 | Meridian Resource & Expl Co, The | Houston, TX 77077 | Oil & Gas Operator | Dec 2000 |
| 18690 | Meridian Resource & Expl LLC,The | Houston, TX 77094 | Oil & Gas Operator | Nov 2012 |
| 18691 | Meridian Resources (USA) Inc. | | Oil & Gas Operator | Jul 2023 |
| 18692 | Meridian Resources, LLC | Evansville, IN 47715 | Oil Operator | Jul 2024 |
| 18693 | Merimac Investments, Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Jan 1997 |
| 18694 | Merit Energy Co. Dba Alabama Merit Energy Co., Inc. | | Oil & Gas Operator | Aug 2005 |
| 18695 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Nov 2024 |
| 18696 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Jul 2024 |
| 18697 | Merit Field LLC | | Oil & Gas Operator | Dec 2001 |
| 18698 | Merit Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | May 1994 |
| 18699 | Merit Productions | | Oil Operator | Sep 1996 |
| 18700 | Meritage Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | May 2013 |