| 1 | 2-K Operating | Corsicana, TX 75109 | Oil & Gas Operator | Mar 2023 |
| 2 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 3 | Activa Resources, LLC | Houston, TX 77269 | Oil & Gas Operator | Apr 2026 |
| 4 | Activa Resources, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2008 |
| 5 | Adair Resources Inc. | Ennis, TX 75120 | Oil & Gas Operator | Apr 2018 |
| 6 | Aladdin Energy, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Feb 1999 |
| 7 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2026 |
| 8 | American Eagle Resources, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2026 |
| 9 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 10 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2026 |
| 11 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Apr 2026 |
| 12 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 13 | Atlantis Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Apr 2026 |
| 14 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Apr 2026 |
| 15 | Atoka Energy LLC | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2026 |
| 16 | Atoka Operating, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2026 |
| 17 | Aunix Operating, LLC | Tomball, TX 77377 | Oil Operator | Apr 2026 |
| 18 | Azteca Petroleum, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2026 |
| 19 | B & B Oil Company | Corsicana, TX 75110 | Oil & Gas Operator | Dec 2025 |
| 20 | B & T Operating Co. | Dawson, TX 76639 | Oil & Gas Operator | Apr 2026 |
| 21 | B J Oil Company | Corsicana, TX 75109 | Oil & Gas Operator | Apr 2026 |
| 22 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 23 | Bancroft Venture LLC | Kerens, TX 75144 | Oil Operator | Apr 2026 |
| 24 | Bar J-B Co., Inc. | Corsicana, TX 75151 | Oil Operator | Apr 2026 |
| 25 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 26 | Bayshore Exploration LLC | Bellville, TX 77418 | Oil & Gas Operator | Dec 2016 |
| 27 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 28 | Bledsoe Petro Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2000 |
| 29 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 30 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2026 |
| 31 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2026 |
| 32 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 33 | Bright Hawk Operating Company | Spring, TX 77388 | Oil & Gas Operator | Apr 2026 |
| 34 | Brothers Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jan 2004 |
| 35 | Brown, C. L. Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1999 |
| 36 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 37 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2026 |
| 38 | Bullitt Oil | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2016 |
| 39 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 40 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 41 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Apr 2026 |
| 42 | Cal-Tex Gas Transmission Co,Inc. | Mabank, TX 75147 | Oil & Gas Operator | Nov 1999 |
| 43 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Apr 2026 |
| 44 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 45 | Casey, W. J. | Fairfield, TX 75840 | Oil & Gas Operator | Apr 2026 |
| 46 | Cemco Oil | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2026 |
| 47 | Central Basin Oil Inv. Inc. | Southlake, TX 76092 | Oil & Gas Operator | Apr 2026 |
| 48 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2026 |
| 49 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 50 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 51 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 52 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 53 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 54 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 55 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 56 | Coley, H. B. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2000 |
| 57 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 58 | Conner-Marrs Company | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2026 |
| 59 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 60 | Contour Expl And Prod, LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2026 |
| 61 | Corsicana Crude Company, LLC | Denver, CO 80202 | Oil Operator | Apr 2026 |
| 62 | Corsicana Crude Holdings, LLC | Denver, CO 80202 | Oil Operator | Apr 2026 |
| 63 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 64 | Corsicana Oil & Gas | Corsicana, TX 75151 | Oil Operator | Apr 2026 |
| 65 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 66 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2026 |
| 67 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Apr 2026 |
| 68 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Apr 2026 |
| 69 | D90 Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2026 |
| 70 | Dallas Production Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2026 |
| 71 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 72 | Dan Texas Company | Waco, TX 76710 | Oil & Gas Operator | Sep 1998 |
| 73 | Decker Operating Co., L.L.C. | Houston, TX 77008 | Oil & Gas Operator | Apr 2026 |
| 74 | Dedica Energy Corporation | Mattoon, IL 61938 | Oil & Gas Operator | Mar 2008 |
| 75 | Delhi Gas Pipeline Corporation | Palestine, TX 75802 | Oil & Gas Operator | Feb 1998 |
| 76 | Denbury Resources Inc. | Plano, TX 75024 | Oil & Gas Operator | Dec 2003 |
| 77 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2026 |
| 78 | Diasu Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 79 | Dixieland Energy LLC | Nacogdoches, TX 75963 | Oil & Gas Operator | Apr 2026 |
| 80 | Dry Creek Operating, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2026 |
| 81 | Edp Management Company | Houston, TX 77056 | Oil & Gas Operator | Jul 2018 |
| 82 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 83 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 84 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 85 | Eqv Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Apr 2026 |
| 86 | Ernest Operating Company | Rockdale, TX 76567 | Oil & Gas Operator | Apr 2026 |
| 87 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jan 2026 |
| 88 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Apr 2026 |
| 89 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 90 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 91 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 92 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 93 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Apr 2026 |
| 94 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Apr 2026 |
| 95 | Fossil Operating, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Apr 2026 |
| 96 | Foxfire Productions, Inc. | Corsicana, TX 75110 | Oil Operator | Jul 2014 |
| 97 | Frances Oil Co. | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2026 |
| 98 | Fulcrum Energy Operating, LLC | Denver, CO 80206 | Oil & Gas Operator | Apr 2026 |
| 99 | Fullerton Energy Corporation | Dallas, TX 75230 | Oil & Gas Operator | Apr 2002 |
| 100 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Apr 2026 |