| 1 | Adams Affiliates, Inc. | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2026 |
| 2 | Adams, K. S. Jr. | Houston, TX 77001 | Gas Operator | Sep 2013 |
| 3 | Adexco Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 4 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Jul 2026 |
| 5 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 6 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 7 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 8 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 9 | Bayou Oil Co. | Los Angeles, CA 90036 | Gas Operator | Nov 1996 |
| 10 | Benson-McCown & Company | Amarillo, TX 79114 | Oil & Gas Operator | Jul 2016 |
| 11 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 12 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Jul 2026 |
| 13 | Bryan Exploration Company | Panhandle, TX 79068 | Gas Operator | Aug 1993 |
| 14 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2026 |
| 15 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 16 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Apr 2026 |
| 17 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Jul 2026 |
| 18 | Cambridge Production, Inc. | Amarillo, TX 79120 | Oil & Gas Operator | Nov 2020 |
| 19 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Oct 2025 |
| 20 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 21 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 22 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 23 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 24 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Jul 2026 |
| 25 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Jul 2026 |
| 26 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jul 2026 |
| 27 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Apr 2026 |
| 28 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 29 | D.W.P. Production | Perryton, TX 79070 | Oil & Gas Operator | Nov 2020 |
| 30 | D10 Energy LLC | Stinnett, TX 79083 | Oil & Gas Operator | Jul 2026 |
| 31 | DDD Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Jul 2026 |
| 32 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Jul 2026 |
| 33 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | Jul 2026 |
| 34 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Jul 2026 |
| 35 | Energy 2000, Inc. | Reno, NV 89501 | Oil & Gas Operator | Jul 2026 |
| 36 | Estacado Energy, Inc. | Austin, TX 78716 | Oil & Gas Operator | Jul 1999 |
| 37 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jan 2026 |
| 38 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2026 |
| 39 | Fortay Inc. | Sunray, TX 79086 | Oil & Gas Operator | Jul 2026 |
| 40 | Frantz Resource Management, LLC | Hartley, TX 79044 | Oil Operator | Jul 2026 |
| 41 | Future Petroleum Company LLC | Houston, TX 77027 | Oil & Gas Operator | Jun 2013 |
| 42 | FX Energy Operating, LLC | Canadian, TX 79014 | Oil & Gas Operator | Jul 2026 |
| 43 | Gaea Services, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2021 |
| 44 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2026 |
| 45 | H & L Exploration Company, LLC | Amarillo, TX 79114 | Oil & Gas Operator | Jul 2026 |
| 46 | H-S Exploration | Gunnison, CO 81230 | Oil & Gas Operator | Jul 2026 |
| 47 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 48 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 49 | High River Res Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jul 2026 |
| 50 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 51 | Le Norman Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2019 |
| 52 | Luxor Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2017 |
| 53 | Lyric Energy, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 1996 |
| 54 | M E G G , Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 2003 |
| 55 | Makoil, Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | Jul 2007 |
| 56 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 57 | McKinney Operating Company | Canadian, TX 79014 | Gas Operator | May 2002 |
| 58 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 59 | Mesa Operating LTD Partnership | Amarillo, TX 79189 | Oil & Gas Operator | May 1994 |
| 60 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Mar 2026 |
| 61 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 62 | Midwestern Exploration Company | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 63 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 64 | Mitchell Ehrlich Oil & Gas, LLC | Austin, TX 78746 | Oil & Gas Operator | Jul 2026 |
| 65 | Mortimer Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2003 |
| 66 | MRR Oil Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2002 |
| 67 | Nec Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Jul 2026 |
| 68 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2026 |
| 69 | O'Ryan Oil And Gas | Odessa, TX 79768 | Oil & Gas Operator | Jul 2026 |
| 70 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2026 |
| 71 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Jul 2026 |
| 72 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 73 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 74 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 75 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Jul 2026 |
| 76 | Presidio Petroleum LLC | Canadian, TX 79014 | Oil & Gas Operator | Jul 2026 |
| 77 | Producers Operating Co Inc | Amarillo, TX 79105 | Oil & Gas Operator | Jul 2026 |
| 78 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Jul 2026 |
| 79 | Questa Energy Corporation | Amarillo, TX 79159 | Oil & Gas Operator | Jul 2026 |
| 80 | Quinque Operating Company | Liberal, KS 67905 | Oil & Gas Operator | Mar 2026 |
| 81 | R.E.D. Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2004 |
| 82 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2026 |
| 83 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Jul 2026 |
| 84 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Jul 2026 |
| 85 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 86 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 87 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2026 |
| 88 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 89 | Sandlot Oil & Gas LLC | Gruver, TX 79040 | Oil & Gas Operator | Jul 2026 |
| 90 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Jul 2026 |
| 91 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2026 |
| 92 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2026 |
| 93 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 94 | Sunlight Exploration, Inc. | Canyon, TX 79015 | Oil & Gas Operator | Jul 2026 |
| 95 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 96 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 97 | Tess Oil Company | Borger, TX 79008 | Oil & Gas Operator | Mar 2008 |
| 98 | Toreador Exploration & Prod Inc | Dallas, TX 75240 | Oil & Gas Operator | Feb 2008 |
| 99 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Jul 2026 |
| 100 | Valpoint Operating, LLC | Amarillo, TX 79101 | Oil & Gas Operator | Jul 2026 |