| 1 | 9K Investments LLC | Cisco, TX 76437 | Oil & Gas Operator | Apr 2024 |
| 2 | Ac Exploration, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 3 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 4 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2024 |
| 5 | Arp Barnett, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 6 | Arrington Oil & Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 7 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 8 | Aruba Petroleum Inc | Dallas, TX 75379 | Oil & Gas Operator | Dec 2023 |
| 9 | Aspect Energy, LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 10 | Atlas Barnett, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2019 |
| 11 | Ausanka Oil Operations | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 12 | Bandera Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2017 |
| 13 | Basal Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Apr 2024 |
| 14 | Bedrock Production, LLC | Katy, TX 77449 | Oil & Gas Operator | Apr 2024 |
| 15 | Big State Industries, Inc. | Houston, TX 77010 | Oil & Gas Operator | Apr 2024 |
| 16 | BKV North Texas, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2024 |
| 17 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 18 | Blackwater Oil & Gas Corporation | Colleyville, TX 76034 | Oil & Gas Operator | May 2018 |
| 19 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 20 | Braka Operating, L.L.C. | Ranger, TX 76470 | Oil & Gas Operator | Apr 2024 |
| 21 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 22 | Brazos Operating LLC | Midland, TX 79710 | Gas Operator | Apr 2024 |
| 23 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2023 |
| 24 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Apr 2024 |
| 25 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 26 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 27 | Casteel, Hoyt F. | Graham, TX 76450 | Oil & Gas Operator | Nov 2001 |
| 28 | Certified Petroleum Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | May 2006 |
| 29 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 30 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2024 |
| 31 | Chief Oil & Gas LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2022 |
| 32 | Chief Operating LLC | Dallas, TX 75225 | Gas Operator | Mar 2009 |
| 33 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Apr 2024 |
| 34 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2024 |
| 35 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 36 | Colo Exploration Company, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Apr 2024 |
| 37 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 38 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2024 |
| 39 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 40 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 41 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 42 | Devon Gas Services LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2023 |
| 43 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2024 |
| 44 | Diversified Production LLC | Minden, LA 71055 | Oil & Gas Operator | Apr 2024 |
| 45 | Double Diamond Energy Corp. | Granbury, TX 76048 | Gas Operator | Apr 2013 |
| 46 | Dte Gas Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2014 |
| 47 | E.G. Operating | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 48 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 49 | Eagleridge Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2024 |
| 50 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 51 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 52 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 53 | Evarado Oil Company | Strawn, TX 76475 | Oil & Gas Operator | Apr 2024 |
| 54 | Expanding Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 55 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Apr 2024 |
| 56 | Fossil Fuels Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2000 |
| 57 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Apr 2024 |
| 58 | Giant Energy Corp. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2019 |
| 59 | Giant NRG Co., LP | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 60 | Grynberg, Jack J. | Denver, CO 80237 | Oil & Gas Operator | Jun 2021 |
| 61 | Hanks, Christopher Glenn | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2024 |
| 62 | Hep Oil Company LTD | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 63 | Hill Operating LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 2023 |
| 64 | Initial Energy Services, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 65 | Javelin Energy Partners Management, LLC | Frisco, TX 75033 | Oil & Gas Operator | Apr 2024 |
| 66 | Jericho Energy, Inc | Lipan, TX 76462 | Gas Operator | Apr 2024 |
| 67 | JJB Operating Co. | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2024 |
| 68 | K & S Oil & Gas Company, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Apr 2024 |
| 69 | Kasle Energy Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Mar 2017 |
| 70 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 71 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 72 | Lincoln Energy Partners, LLC | Graham, TX 76450 | Oil Operator | Apr 2024 |
| 73 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 74 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 75 | Lyon Energy, Inc. | Plano, TX 75075 | Oil & Gas Operator | Feb 2000 |
| 76 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | Apr 2024 |
| 77 | Marshall, Sam | Granbury, TX 76048 | Oil & Gas Operator | Aug 2010 |
| 78 | Marshall, Samuel Meek, Estate Of | Granbury, TX 76048 | Oil & Gas Operator | Apr 2024 |
| 79 | Meeker & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 80 | Meeker, Dan Management, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 2007 |
| 81 | Merimac Investments, Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Jan 1997 |
| 82 | Mississippi Ventures, Inc. | Granbury, TX 76048 | Gas Operator | Jul 1997 |
| 83 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 84 | MKS Consulting Corporation | Weatherford, TX 76086 | Oil & Gas Operator | Jul 2005 |
| 85 | MKS Natural Gas Company | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2016 |
| 86 | Mosaic Texas LLC | Dallas, TX 75205 | Oil & Gas Operator | Apr 2024 |
| 87 | Nichols Oil & Gas Corporation | Shreveport, LA 71135 | Oil & Gas Operator | Aug 2003 |
| 88 | Nichols,Edwin S Explorations Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 89 | Oakridge Oil And Gas, LP | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2024 |
| 90 | Odegard Energy, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2020 |
| 91 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 92 | Pack-Man Energy Company | Ranger, TX 76470 | Oil & Gas Operator | Nov 2005 |
| 93 | Peak Energy Operating #2, LLC | Durango, CO 81301 | Oil & Gas Operator | Jun 2006 |
| 94 | Peak Operating Of Texas, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 95 | Phillips, Bob | Weatherford, TX 76086 | Oil & Gas Operator | Nov 2019 |
| 96 | Precision Operating Inc. | Richardson, TX 75080 | Oil & Gas Operator | Jul 2014 |
| 97 | Premier Natural Resources II,LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2015 |
| 98 | Premier Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2024 |
| 99 | Proco Operating Co., Inc. | Graford, TX 76449 | Oil & Gas Operator | Apr 2024 |
| 100 | Producers Engineering Company | Destin, FL 32541 | Oil & Gas Operator | Sep 1999 |