| 1 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 2 | 4P Energy Texas, LLC | Denver, CO 80206 | Oil & Gas Operator | Nov 2020 |
| 3 | 5 G Resources, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 4 | 6a Production | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 5 | A & B Well Service Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Nov 2006 |
| 6 | Adams & McGahey | Amarillo, TX 79114 | Oil & Gas Operator | Nov 1998 |
| 7 | Adams, K. S. Jr. | Houston, TX 77001 | Gas Operator | Sep 2013 |
| 8 | Adams, R. W. & Son | Amarillo, TX 79109 | Oil & Gas Operator | Oct 1996 |
| 9 | Adobe Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 10 | Amarillo Natural Gas, Inc. | Amarillo, TX 79119 | Gas Operator | Jul 1996 |
| 11 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 12 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 13 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 14 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 15 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 16 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 17 | Arrington Production Company | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 18 | Audrey Oil & Gas LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 19 | B & B Farm Industries, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2002 |
| 20 | Back, Neville | McLean, TX 79057 | Gas Operator | Jan 1999 |
| 21 | Bar L Producers | Fritch, TX 79036 | Oil & Gas Operator | Feb 2025 |
| 22 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 23 | Barker Production Co. | Shamrock, TX 79079 | Oil & Gas Operator | Mar 2010 |
| 24 | Barker Production Co., LP | San Angelo, TX 76904 | Oil & Gas Operator | Jul 2025 |
| 25 | Batton Oil & Gas, LLC | Spearman, TX 79081 | Oil & Gas Operator | Jul 2025 |
| 26 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 27 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2025 |
| 28 | Benson-McCown & Company | Amarillo, TX 79114 | Oil & Gas Operator | Jul 2016 |
| 29 | Beta-Tex, An Oklahoma Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | Aug 2024 |
| 30 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 31 | BHB Operating Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Jul 2025 |
| 32 | Black Resources | Borger, TX 79008 | Oil & Gas Operator | Jul 2025 |
| 33 | Black Sheep Operating, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Jul 2025 |
| 34 | Black'S Oil & Gas | Borger, TX 79008 | Oil & Gas Operator | Jul 2025 |
| 35 | Blue Dolphin Production LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2025 |
| 36 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 37 | Borger Resources 2 LLC | Borger, TX 79007 | Oil & Gas Operator | Jul 2025 |
| 38 | Borger Resources 4 LLC | Borger, TX 79007 | Oil & Gas Operator | Jul 2025 |
| 39 | Bowers Oil & Gas, Inc. | Grand Junction, CO 81505-1097 | Oil & Gas Operator | Nov 2022 |
| 40 | Bradley Operating Co. | Pampa, TX 79065 | Oil & Gas Operator | Jul 2025 |
| 41 | Bronco Oil Company | San Angelo, TX 76904 | Oil & Gas Operator | Dec 2024 |
| 42 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 43 | Broyles, Charles R. | Pampa, TX 79065 | Gas Operator | Mar 2016 |
| 44 | Bryan Exploration Company | Panhandle, TX 79068 | Gas Operator | Aug 1993 |
| 45 | Buffalo Raider Consulting, LLC | Amarillo, TX 79119 | Oil & Gas Operator | Jul 2025 |
| 46 | Burger, Ken | Pampa, TX 79065 | Oil & Gas Operator | Jul 2025 |
| 47 | Burnett Corp. | Amarillo, TX 79105 | Oil & Gas Operator | May 1998 |
| 48 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 49 | C. O. Oil And Gas, LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 50 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 51 | Cal-T Oil Company, Incorporated | Borger, TX 79008 | Oil & Gas Operator | Feb 2008 |
| 52 | Caldwell Production Co. Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2010 |
| 53 | Cambridge Production, Inc. | Amarillo, TX 79120 | Oil & Gas Operator | Nov 2020 |
| 54 | Caprock Engineering, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2018 |
| 55 | Chance Energy Co. Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Sep 1999 |
| 56 | Chapter Petroleum | Borger, TX 79008 | Oil & Gas Operator | Mar 1997 |
| 57 | Chase Operating Company | Abilene, TX 79608 | Oil & Gas Operator | Feb 2016 |
| 58 | Chase Production Company | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 59 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2025 |
| 60 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 61 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 62 | Childers, J. C. | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 63 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 64 | Circle W Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 65 | City Of McLean | McLean, TX 79057 | Gas Operator | Jul 2025 |
| 66 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 67 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Jul 2025 |
| 68 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2025 |
| 69 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 70 | Cochise Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 71 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 72 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 73 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 74 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jul 2025 |
| 75 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2025 |
| 76 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 77 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Apr 2025 |
| 78 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 79 | Crow Creek Operating Co II LLC | Houston, TX 77252 | Oil & Gas Operator | Jul 2011 |
| 80 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 81 | Crude Operators, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 82 | Culebra Oil & Gas LLC | Kerrville, TX 78028 | Oil & Gas Operator | Jul 2025 |
| 83 | Curzac Oil And Gas, LLC | Plano, TX 75075 | Oil & Gas Operator | Jul 2025 |
| 84 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 85 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Jul 2025 |
| 86 | Dakar Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 87 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 88 | Danco Oil & Gas | White Deer, TX 79097 | Oil & Gas Operator | Aug 2013 |
| 89 | Daniels Energy | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 90 | Daniels, J.C. Energy | Pampa, TX 79066 | Oil & Gas Operator | Apr 2001 |
| 91 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Jul 2025 |
| 92 | Davenport, Vernon | Shamrock, TX 79079 | Oil & Gas Operator | Mar 2008 |
| 93 | Davenport, Vernon Prod. Co. | Dumas, TX 79029 | Oil & Gas Operator | Jan 2002 |
| 94 | Dawn Oil & Gas Operators Inc. | Borger, TX 79007 | Oil & Gas Operator | Jul 2025 |
| 95 | Dawson, B G Oil & Gas LTD | Dallas, TX 75205 | Oil & Gas Operator | Jul 2024 |
| 96 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 97 | Den Cal, Inc. | Borger, TX 79007 | Oil & Gas Operator | Jul 2025 |
| 98 | Denny'S Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2000 |
| 99 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 100 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |