| 6601 | M A S Operators | Kilgore, TX 75663 | Oil & Gas Operator | Jul 1999 |
| 6602 | M E G G , Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 2003 |
| 6603 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Mar 2025 |
| 6604 | M H W, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Jul 1996 |
| 6605 | M IV Ops., Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 1998 |
| 6606 | M R Ventures LLC | Dallas, TX 75367 | Oil & Gas Operator | May 2025 |
| 6607 | M S B Company | Slaton, TX 79364 | Oil & Gas Operator | Dec 2016 |
| 6608 | M T M Oil | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 6609 | M W Production Co. | New Braunfels, TX 78130 | Oil & Gas Operator | Aug 2003 |
| 6610 | M'Red Petroleum, LLC | Pampa, TX 79065 | Oil & Gas Operator | Dec 2010 |
| 6611 | M-2 Oil Company | Wichita Falls, TX 76306 | Oil & Gas Operator | May 2006 |
| 6612 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Jul 2025 |
| 6613 | M-C Production & Drilling Co,Inc | Longview, TX 75608 | Oil & Gas Operator | Jul 2025 |
| 6614 | M-Five Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Apr 2002 |
| 6615 | M-G Gas Company, Inc. | Plano, TX 75086 | Oil & Gas Operator | Jun 1999 |
| 6616 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 6617 | M-Tex Resources, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Jul 2025 |
| 6618 | M-V Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6619 | M-W-D Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jul 1999 |
| 6620 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Jul 2025 |
| 6621 | M. Grace, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Jul 2025 |
| 6622 | M. J. G., Inc. | Alice, TX 78333 | Oil & Gas Operator | Jul 2010 |
| 6623 | M. K. Production | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 6624 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 6625 | M. S. Productions, Inc. | Pittsburg, KS 66762 | Oil & Gas Operator | Nov 2019 |
| 6626 | M.A.R.S. Energy | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 6627 | M.B. Properties, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 1995 |
| 6628 | M.B.J. Operating | Argyle, TX 76226 | Oil & Gas Operator | Jun 2022 |
| 6629 | M.D. Skroopka Operating, LLC | Oakland, CA 94611 | Oil & Gas Operator | Jul 2025 |
| 6630 | M.J.O.G., Inc. | Fort Smith, AR 72903 | Oil Operator | Mar 2015 |
| 6631 | M.R.M. Operating, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 2003 |
| 6632 | M2 Squared Operating, LLC | Rockwall, TX 75032 | Oil Operator | Jul 2025 |
| 6633 | M3V Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Jul 2025 |
| 6634 | M5 Standing Energy, LLC | Decatur, TX 76234 | Oil & Gas Operator | Jul 2025 |
| 6635 | M5oexit, LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 6636 | Mac 5 Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Feb 2021 |
| 6637 | Mac Operating | Graham, TX 76450 | Oil & Gas Operator | Jun 2023 |
| 6638 | Mace, T. A. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2008 |
| 6639 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Jul 2025 |
| 6640 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 6641 | Macina, P.T. | Shamrock, TX 79079 | Gas Operator | Jul 2025 |
| 6642 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | May 2025 |
| 6643 | Mack Energy Corporation | Artesia, NM 88211 | Oil & Gas Operator | May 2025 |
| 6644 | Maclane Gas Company L.P. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Mar 1994 |
| 6645 | Maddox Operating | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2025 |
| 6646 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | Jul 2025 |
| 6647 | Maddux, Elizabeth H. | San Antonio, TX 78217 | Oil & Gas Operator | Nov 1995 |
| 6648 | Madera, R. F. | Palm Desert, CA 92210 | Oil & Gas Operator | Sep 2000 |
| 6649 | Madison And Wright LLC | The Colony, TX 75056 | Oil & Gas Operator | Jul 2025 |
| 6650 | Madison Oil Co.-Halbouty, M. T. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 6651 | Madison Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 6652 | Maersk Energy Inc. | Houston, TX 77042 | Oil & Gas Operator | Oct 1994 |
| 6653 | Maertins Production, LLC | Queen City, TX 75572 | Oil Operator | Jul 2025 |
| 6654 | Magellan E&P Holdings, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2021 |
| 6655 | Maggert Energy Corp. | Spring, TX 77387 | Gas Operator | Jun 1998 |
| 6656 | Magic Circle Energy | Oklahoma City, OK 73185 | Oil & Gas Operator | Dec 1983 |
| 6657 | Magic City Oil & Gas | Amarillo, TX 79109 | Oil & Gas Operator | Jul 2025 |
| 6658 | Magic Oil & Gas Inc. | Houston, TX 77079 | Oil & Gas Operator | Jan 2001 |
| 6659 | Magna Diversified Group, Inc. | Jacksonville, TX 75766 | Oil & Gas Operator | Oct 2013 |
| 6660 | Magna Oil & Gas Corporation | Irving, TX 75017 | Oil & Gas Operator | Feb 2016 |
| 6661 | Magna Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 6662 | Magnatex Corp | Midland, TX 79702-1311 | Oil & Gas Operator | Feb 1995 |
| 6663 | Magnet Oil LP | Bronte, TX 76933 | Oil & Gas Operator | Jul 2025 |
| 6664 | Magnolia Oil & Gas Operating LLC | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 6665 | Magnolia Production Co | Atlanta, TX 75551 | Oil & Gas Operator | Jul 2025 |
| 6666 | Magnum Energy Inc | Norman, OK 73072-2403 | Oil & Gas Operator | May 2025 |
| 6667 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 6668 | Magnum Hunter Production, Inc. | Irving, TX 75014 | Oil & Gas Operator | Dec 2019 |
| 6669 | Magnum Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2000 |
| 6670 | Magnum Oilfield Services LLC | Bakersfield, CA 93309 | Oil Operator | Jul 2025 |
| 6671 | Magnum Operating, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 6672 | Magnum Petroleum, Inc. | Palm Desert, CA 92260 | Oil & Gas Operator | Nov 2013 |
| 6673 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 6674 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 6675 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | Jul 2025 |
| 6676 | Magruder '81, LTD. | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 6677 | Magruder, Edwin H., Jr. | Midland, TX 79701 | Oil & Gas Operator | Oct 2019 |
| 6678 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 6679 | Mahfouz Energy Company | Houston, TX 77255 | Oil & Gas Operator | Nov 2020 |
| 6680 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |
| 6681 | Mahler, Kelly Operating | Graham, TX 76450 | Oil & Gas Operator | Mar 2017 |
| 6682 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Mar 2025 |
| 6683 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 6684 | Main Street Royalty, Inc. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 1999 |
| 6685 | Majestic Oil & Gas Holding Co. | Midland, TX 79705 | Oil Operator | Jul 2025 |
| 6686 | Majestic Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2007 |
| 6687 | Majestic Petroleum Corporation | Dallas, TX 75230 | Oil & Gas Operator | Oct 1996 |
| 6688 | Majestic Resources, Inc. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Nov 2007 |
| 6689 | Mak-J Energy Partners(TX),LTD. | Denver, CO 80206 | Oil & Gas Operator | Sep 2013 |
| 6690 | Makar Production Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 6691 | Makk Oil Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 6692 | Mako Exploration Management, LLC | Shreveport, LA 71105 | Oil & Gas Operator | Jul 2025 |
| 6693 | Makoil, Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | Jul 2007 |
| 6694 | Maledon Enterprises | Austin, TX 78738 | Oil & Gas Operator | Feb 1996 |
| 6695 | Mallon Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2005 |
| 6696 | Mallory, Meredith, Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2002 |
| 6697 | Malone Oil Production | La Vernia, TX 78121 | Oil & Gas Operator | Jul 2025 |
| 6698 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 6699 | Mamerow Energy Corp | Ganado, TX 77962 | Oil & Gas Operator | Jul 2025 |
| 6700 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |