| 19501 | Mountain Front Pipeline Co Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 19502 | Mountain Fuel Supply Co | Salt Lake City, UT 84139 | Oil & Gas Operator | May 1984 |
| 19503 | Mountain Hawk Energy LLC | Athens, TX 75751 | Gas Operator | Jan 2015 |
| 19504 | Mountain Oil And Gas Inc | Roosevelt, UT 84066 | Oil & Gas Operator | Jun 2024 |
| 19505 | Mountain Pacific General Inc. | Cut Bank, MT 59427 | Oil & Gas Operator | Jun 2022 |
| 19506 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 19507 | Mountain Resource Corporation | Salt Lake City, UT 84124 | Oil & Gas Operator | Dec 1988 |
| 19508 | Mountain State Oil Company, L..L.C. | Pennsboro, WV 26415-0014 | Oil & Gas Operator | Dec 2021 |
| 19509 | Mountain State Production, Inc | | Gas Operator | Dec 2022 |
| 19510 | Mountain State Well Tending | Hurricane, WV 25526-0000 | Oil & Gas Operator | Dec 2021 |
| 19511 | Mountain States Petroleum Corp | Midland, TX 79702 | Oil & Gas Operator | Apr 2008 |
| 19512 | Mountain States Resources Inc | Cut Bank, MT 59427 | Oil & Gas Operator | Oct 2000 |
| 19513 | Mountain V Oil & Gas, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 19514 | Mountain V, LLC | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 19515 | Mountain VIew Resources LLC | | Oil & Gas Operator | Jul 2024 |
| 19516 | Mountaineer Gas Transmission, Inc. | Fort Worth, TX 76185-0000 | Oil & Gas Operator | Dec 2021 |
| 19517 | Mountaineer State Energy, Inc. | Dallas, TX 75234 | Oil & Gas Operator | Dec 2021 |
| 19518 | Mountaineer State Operations, LLC | Sandyville, WV 25275 | Oil & Gas Operator | Dec 2023 |
| 19519 | Mountaineer Trading Company, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2016 |
| 19520 | Mountaintop Baking Co | Kimper, KY 41539 | Gas Operator | Dec 2022 |
| 19521 | Mowata Oil Company | Victoria, TX 77903 | Oil & Gas Operator | Oct 1996 |
| 19522 | Moxy Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Aug 2003 |
| 19523 | Moy, Gary | Falls City, TX 78113 | Oil & Gas Operator | Nov 1998 |
| 19524 | Moylan, Jimmie C. | Eastland, TX 76448 | Oil & Gas Operator | Sep 2024 |
| 19525 | Moylan, Thomas F. | Lacygne, KS 66040 | Oil & Gas Operator | Dec 1993 |
| 19526 | Mozark Corporation | Spring, TX 77379-8049 | Oil & Gas Operator | Jan 2011 |
| 19527 | Moze Inc | Ochelata, OK 74051 | Oil & Gas Operator | Jan 2001 |
| 19528 | MPG Petroleum | San Antonio, TX 78217 | Oil & Gas Operator | Aug 2003 |
| 19529 | MPG Petroleum, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2024 |
| 19530 | Mr NM Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Jul 2024 |
| 19531 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 19532 | MRD Nowata LLC | Woodstock, GA 30189 | Oil Operator | Aug 2017 |
| 19533 | MRD Operating LLC | | Oil & Gas Operator | Dec 2016 |
| 19534 | MRD Operating LLC (Delaware) | Houston, TX 77010 | Oil & Gas Operator | Jul 2015 |
| 19535 | Mri Ventures, Inc. | | Oil Operator | Dec 1993 |
| 19536 | Mroz Baier, Christine | Memphis, TN 38120 | Gas Operator | Dec 2023 |
| 19537 | MRR Oil Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2002 |
| 19538 | Mrs. C. M. Roberson | | Oil Operator | Mar 1989 |
| 19539 | Mrs. Cecile Andries & Sons | | Oil Operator | Dec 2006 |
| 19540 | MRT Exploration Co | | Oil & Gas Operator | Feb 1983 |
| 19541 | MS Producing LLC | Creston, OH 44217 | Oil & Gas Operator | Dec 2023 |
| 19542 | MS United, LLC | | Oil & Gas Operator | Jul 2024 |
| 19543 | MSB Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2024 |
| 19544 | MSB Operating Company | Enid, OK 73703 | Oil & Gas Operator | Jan 2005 |
| 19545 | MSD Energy, Inc | Rapid City, SD 57702 | Oil & Gas Operator | Dec 2020 |
| 19546 | MSD Operating, LLC | Big Spring, TX 79721 | Oil & Gas Operator | Sep 2024 |
| 19547 | Mse Operating Corp. | Beaverton, OR 97008 | Oil & Gas Operator | Sep 2024 |
| 19548 | MSG Resources Inc. | Iola, KS 66749 | Oil Operator | May 2024 |
| 19549 | MSL Oil & Gas Corp | Bradford, PA 16701-0151 | Oil & Gas Operator | Dec 2023 |
| 19550 | MSN Oil, Inc. | Avoca, TX 79503 | Oil Operator | Sep 2024 |
| 19551 | MSR Exploration, Inc. | Winters, TX 79567 | Oil & Gas Operator | Mar 2000 |
| 19552 | MSSK Consulting LLC | San Antonio, TX 78253 | Oil Operator | Sep 2024 |
| 19553 | MT Dora Energy Corporation | Duncan, OK 73533-1829 | Oil & Gas Operator | Apr 2014 |
| 19554 | MT Dora Energy LLC | Houston, OK 77056-1940 | Oil & Gas Operator | Jun 2019 |
| 19555 | MT Energy LLC | Waskom, TX 75692 | Oil & Gas Operator | Sep 2024 |
| 19556 | MT. Crescent Operating Company, LLC | | Oil & Gas Operator | Jun 2024 |
| 19557 | MTBB Acquisition Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2022 |
| 19558 | MTG Operating Inc | Ridgeland, MS 39158 | Gas Operator | Apr 2011 |
| 19559 | MTM Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | May 2024 |
| 19560 | MTN Energy | Aleppo, PA 15310 | Oil & Gas Operator | Dec 2023 |
| 19561 | MTN V Oil & Gas Inc | Indiana, PA 15701-8914 | Oil & Gas Operator | Jan 2024 |
| 19562 | Mto Oil Company | Okay, OK 74446-0354 | Oil Operator | Jul 2019 |
| 19563 | Mud Creek Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Sep 2024 |
| 19564 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Aug 2024 |
| 19565 | Mud River Gas Co | | Gas Operator | Dec 2021 |
| 19566 | Mud River Oil & Gas, LLC | Rochester, KY 42273 | Oil Operator | Dec 2021 |
| 19567 | Mudslinger Oil, L.L.C. | Abilene, TX 79601 | Oil Operator | Sep 2024 |
| 19568 | Muegge Don E | Lamont, OK 74643-5010 | Oil & Gas Operator | Dec 1996 |
| 19569 | Muegge, Clay A. | Lamont, OK 74643 | Oil & Gas Operator | Jul 2024 |
| 19570 | Mueggenborg Derrick R Dba DRM Oil & Gas | Yale, OK 74085 | Oil Operator | Jul 2024 |
| 19571 | Mueller Engineering Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Feb 2002 |
| 19572 | Mueller Exploration, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2024 |
| 19573 | Mueller Fred W | | Oil & Gas Operator | Dec 1995 |
| 19574 | Mueller Oil | | Oil Operator | May 2024 |
| 19575 | Mueller Thomas C | Fort Smith, AR 72913 | Gas Operator | Aug 2008 |
| 19576 | Mueller Thomas C LTD | Oklahoma City, OK 73102-5683 | Gas Operator | Aug 2008 |
| 19577 | Mueller, Thomas C Inc | | Gas Operator | Dec 2004 |
| 19578 | Mueller, Thomas C, Of Crawford County Inc | | Gas Operator | Dec 2004 |
| 19579 | Muenster Drilling Co. Inc. | Muenster, TX 76252 | Oil & Gas Operator | Sep 2024 |
| 19580 | Muffoletto, Michael R. | Brant, NY 14027 | Gas Operator | Dec 2023 |
| 19581 | Mugg, John D. Jr. | San Antonio, TX 78216 | Oil & Gas Operator | Nov 1997 |
| 19582 | Muirfield Exploration, LTD. | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2024 |
| 19583 | Muirfield Resources Company | Tulsa, OK 74101-3166 | Oil & Gas Operator | Jun 2024 |
| 19584 | Mulberry Oil & Gas, LLC | Mulberry, AR 72947 | Gas Operator | Jun 2024 |
| 19585 | Muldowney Development, Inc. | Dunkirk, NY 14048 | Gas Operator | Dec 2023 |
| 19586 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Jun 2024 |
| 19587 | Mullen Exploration Inc | | Oil & Gas Operator | Dec 2002 |
| 19588 | Mullen Jr J S | | Oil & Gas Operator | Feb 1992 |
| 19589 | Mullen Resources LLC | Reedy, WV 25270 | Oil & Gas Operator | Dec 2021 |
| 19590 | Mullen William Company | Edmond, OK 73083-1372 | Oil & Gas Operator | May 1999 |
| 19591 | Mullen-Hathorn-Bass | | Oil & Gas Operator | Mar 1985 |
| 19592 | Muller Oil & Gas | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2024 |
| 19593 | Mullin, W. B. | Graham, TX 76450 | Oil & Gas Operator | Sep 1998 |
| 19594 | Mullins & Prichard | | Oil & Gas Operator | May 1992 |
| 19595 | Mullins Jimmy R Dba Southcreek Petroleum Co | Dibble, OK 73031 | Oil & Gas Operator | Jan 2021 |
| 19596 | Mullins John S | Hominy, OK 74035 | Oil Operator | Nov 2014 |
| 19597 | Mullins Well Service | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 2018 |
| 19598 | Mullins, Manuel | Olney, TX 76374 | Oil & Gas Operator | Sep 2024 |
| 19599 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2024 |
| 19600 | Mulloy, J. W. Associates, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2003 |