| 18701 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 18702 | McDonald, R. A. Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Oct 2002 |
| 18703 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | May 2025 |
| 18704 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 18705 | McDowell And Cook, Inc. | | Oil Operator | Jan 1987 |
| 18706 | McDowell Ranch | Shamrock, TX 79079 | Gas Operator | May 2025 |
| 18707 | McElroy Drilling Co., Inc. | | Gas Operator | Dec 1987 |
| 18708 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Feb 2025 |
| 18709 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 18710 | McElvain Oil & Gas Properties Inc | Denver, CO 80265-2080 | Oil & Gas Operator | Jul 2011 |
| 18711 | McEn 1996 Partnership | | Oil & Gas Operator | Sep 1999 |
| 18712 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 18713 | McEuen, Billy Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 18714 | McEver Oil Company Inc. | Austin, TX 78789 | Oil & Gas Operator | Mar 2008 |
| 18715 | MCF Co. | | Oil & Gas Operator | Dec 2011 |
| 18716 | McFadden Energy TX, LLC | Lakewood, NY 14750 | Oil Operator | May 2025 |
| 18717 | McFadden Oil Co. | | Oil Operator | Jan 2025 |
| 18718 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | May 2025 |
| 18719 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 18720 | McFerran Operating LLC | Seminole, OK 74868-6202 | Oil & Gas Operator | Mar 2025 |
| 18721 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 18722 | McGee Drilling Corporation | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 18723 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Feb 2025 |
| 18724 | McGehee, George T. Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 1997 |
| 18725 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 18726 | McGill, Dennis M. | Sherman, NY 14781 | Gas Operator | Dec 2023 |
| 18727 | McGinley Jr, John R | | Gas Operator | Nov 1998 |
| 18728 | McGinley P A | Tulsa, OK 74101 | Oil & Gas Operator | Dec 1996 |
| 18729 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Feb 2025 |
| 18730 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 18731 | McGinness Oil Company Of Kansas, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Nov 2019 |
| 18732 | McGinnis Oil | | Oil & Gas Operator | Dec 2002 |
| 18733 | McGoldrick & Watson | | Oil & Gas Operator | Jul 1987 |
| 18734 | McGoldrick & Watson - Alagood | | Oil Operator | Oct 1995 |
| 18735 | McGoldrick & Watson DRLG., Co. | | Oil & Gas Operator | Jul 1987 |
| 18736 | McGoldrick & Watson, Et Al | | Oil Operator | Jul 1987 |
| 18737 | McGoldrick & Watson-Walker | | Oil Operator | Jul 1987 |
| 18738 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 18739 | McGonagill J W | MT Gilead, OH 43338 | Oil Operator | Dec 1984 |
| 18740 | McGonigal Dan L | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2024 |
| 18741 | McGonigal Donald T | Tulsa, OK 74114-2145 | Oil & Gas Operator | Jul 2004 |
| 18742 | McGonigal Ted W | Norman, OK 73072 | Oil & Gas Operator | Mar 2025 |
| 18743 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 18744 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | May 2025 |
| 18745 | McGowen Resources Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 18746 | McGown Drilling | | Oil Operator | Apr 1993 |
| 18747 | McGown Drilling, Inc. | Mound City, KS 66056 | Oil Operator | Jan 2025 |
| 18748 | McGrath, Rollie | Lake City, KS 67071 | Gas Operator | Jan 2025 |
| 18749 | McGriff Craig Exploration Inc | Oklahoma City, OK 73172-0364 | Oil & Gas Operator | Mar 2023 |
| 18750 | McGuffin, Joe Jr. | Christoval, TX 76935 | Oil & Gas Operator | May 2025 |
| 18751 | McGuffin, Joe S. Inc. | Mathis, TX 78368 | Gas Operator | May 2025 |
| 18752 | McGuire Brothers | Phoenix, AZ 85045 | Oil & Gas Operator | May 2025 |
| 18753 | McGuire John C | Gillette, WY 82717 | Oil & Gas Operator | Oct 2005 |
| 18754 | McGuire Tom Oil Company | Depew, OK 74028 | Oil Operator | Apr 2011 |
| 18755 | McIlhenny-Powell Operating Co | | Gas Operator | Aug 1983 |
| 18756 | McIlvain Oil LLC | Madison, KS 66860 | Oil Operator | Dec 2017 |
| 18757 | McIntosh Oil & Gas, Inc. | Coalton, WV 26257 | Oil & Gas Operator | Dec 2021 |
| 18758 | McIntyre M L | Oklahoma City, OK 73154-0523 | Oil & Gas Operator | Jul 1996 |
| 18759 | McIntyre Oil Company | | Oil & Gas Operator | Jan 1992 |
| 18760 | McIver, Inc | San Angelo, TX 76903 | Oil & Gas Operator | May 2025 |
| 18761 | McIver, Terry L. | Santa Anna, TX 76878 | Oil & Gas Operator | Aug 2003 |
| 18762 | McKay Oil | Portales, NM 88130 | Oil & Gas Operator | Apr 1996 |
| 18763 | McKay Oil & Gas LLC | Albuquerque, NM 87191 | Gas Operator | Mar 2020 |
| 18764 | McKay Oil Company | Perry, OK 73077 | Oil Operator | Nov 2008 |
| 18765 | McKay Oil Corp | Roswell, NM 88202 | Oil & Gas Operator | Aug 2017 |
| 18766 | McKay Operating LLC | Lubbock, TX 79416 | Oil & Gas Operator | Oct 2023 |
| 18767 | McKean Bros. | | Oil & Gas Operator | Dec 1997 |
| 18768 | McKee Don Drill Co Inc | Newark, OH 43058 | Oil & Gas Operator | Dec 2012 |
| 18769 | McKee Energy Comapny Inc | | Oil & Gas Operator | Apr 2011 |
| 18770 | McKee, Kenneth W. Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 18771 | McKeever, Tyra, Swenson Venture | Stamford, TX 79553 | Oil & Gas Operator | Apr 1996 |
| 18772 | McKellpee Energy Corp. | Olean, NY 14760 | Oil & Gas Operator | Dec 2023 |
| 18773 | McKelvy A D Oil | | Gas Operator | Feb 1995 |
| 18774 | McKenna Oil Co | Kane, PA 16735-9711 | Oil & Gas Operator | Dec 2004 |
| 18775 | McKenney & Chambers Oil Company | Westbrook, TX 79565 | Oil & Gas Operator | Oct 2003 |
| 18776 | McKenzie & Assoc. | | Gas Operator | Dec 1990 |
| 18777 | McKenzie Management Inc. | | Oil & Gas Operator | Aug 1989 |
| 18778 | McKenzie Methane | Houston, TX BAD ADDR | Gas Operator | Apr 1994 |
| 18779 | McKenzie Operating Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 18780 | McKenzie Petroleum Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 18781 | McKenzie Production Company | Houston, TX 77063 | Oil & Gas Operator | May 1995 |
| 18782 | McKinney Kenneth R | Okmulgee, OK 74447-6932 | Oil Operator | Aug 2000 |
| 18783 | McKinney Operating Company | Canadian, TX 79014 | Gas Operator | May 2002 |
| 18784 | McKinney, Jason G. | | Oil Operator | Dec 2021 |
| 18785 | McKinney, M. H. | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 18786 | McKnight, C. L. | McLeod, TX 75565 | Oil & Gas Operator | May 2025 |
| 18787 | McKnight, C. L. Oil Co. LLP | McLeod, TX 75565 | Oil & Gas Operator | May 2025 |
| 18788 | McKnight, J. C. | Jefferson, TX 75657 | Oil & Gas Operator | Nov 2019 |
| 18789 | MCL 1 Oil & Gas Wyoming LLC | Minneapolis, MN 55402 | Oil & Gas Operator | Jul 2018 |
| 18790 | McLain Exploration, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Mar 2008 |
| 18791 | McLain J. Forman | | Oil & Gas Operator | Mar 1988 |
| 18792 | McLane Trust* Dixie | | Gas Operator | Mar 2025 |
| 18793 | McLaurin Oil Co. | | Oil Operator | Jan 2025 |
| 18794 | McLelland Engineering & MGMT. | Houston, TX 77042 | Oil & Gas Operator | Mar 1999 |
| 18795 | McLemore, Laurence | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 18796 | McLennan Family Properties LLP | | Oil & Gas Operator | Dec 2021 |
| 18797 | McLeod Gas Gath & Proc Co. L.L.C. | | Oil Operator | Jul 2012 |
| 18798 | McLeod, George L. Inc. | Houston, TX 77079 | Oil & Gas Operator | Sep 2002 |
| 18799 | McLester Oil & G | | Oil & Gas Operator | Jun 1992 |
| 18800 | McLish & Luff | Denver, CO 80202 | Gas Operator | Nov 1972 |