| 1 | 3-T Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2025 |
| 2 | 4P Energy Texas, LLC | Denver, CO 80206 | Oil & Gas Operator | Nov 2020 |
| 3 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Sep 2025 |
| 4 | Aladdin Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2021 |
| 5 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 6 | Amarillo Exploration, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Sep 2025 |
| 7 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 8 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 9 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 10 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 11 | Ammo Energy, LLC | Oklahoma City, OK 73160 | Oil & Gas Operator | Feb 2009 |
| 12 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 13 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2025 |
| 14 | Ananda Energy Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2021 |
| 15 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 16 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 17 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 18 | Athena Energy, Inc. | Gallatin, TN 37066 | Oil & Gas Operator | Sep 2025 |
| 19 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2025 |
| 20 | Axio Production Company, L.P. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2006 |
| 21 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Sep 2025 |
| 22 | B & B Farm Industries, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2002 |
| 23 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Sep 2025 |
| 24 | B J Resources, L.L.C. | Athens, TX 75751 | Oil & Gas Operator | Sep 2025 |
| 25 | Bannon Energy Inc | Houston, TX 77068 | Oil & Gas Operator | Jun 1998 |
| 26 | Barrett Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 27 | Batton Oil & Gas, LLC | Spearman, TX 79081 | Oil & Gas Operator | Sep 2025 |
| 28 | Baytide Petr. Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 1997 |
| 29 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2025 |
| 30 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2025 |
| 31 | Be Anadarko II, LLC | Austin, TX 78731 | Oil & Gas Operator | Sep 2025 |
| 32 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 33 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 34 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | May 2025 |
| 35 | Bison Petroleum Corporation | Amarillo, TX 79121 | Oil & Gas Operator | Mar 1996 |
| 36 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 37 | Blue Dolphin Production LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2025 |
| 38 | Blue Grass Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2025 |
| 39 | Borderline Operating Corp. | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 40 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 41 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 42 | BP Operating Company, LLC | Dallas, TX 75225 | Oil & Gas Operator | Jul 2022 |
| 43 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2025 |
| 44 | Bravo Natural Gas, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2012 |
| 45 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 46 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 47 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 48 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 49 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 50 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 2025 |
| 51 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Sep 2025 |
| 52 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 53 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 54 | Caldwell Production Co. Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2010 |
| 55 | Cambridge Production, Inc. | Amarillo, TX 79120 | Oil & Gas Operator | Nov 2020 |
| 56 | Canyon Creek Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 57 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | May 2025 |
| 58 | Cardwell Oil Corporation | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 59 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2025 |
| 60 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 61 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 62 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 63 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 64 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Sep 2025 |
| 65 | Cimarex Energy Co. | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 66 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 67 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Sep 2025 |
| 68 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Jun 2025 |
| 69 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 70 | Clements Exploration Co | Oklahoma City, OK 73132-5922 | Oil & Gas Operator | Jan 2006 |
| 71 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Sep 2025 |
| 72 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 73 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 74 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 75 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 76 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 77 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 78 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Sep 2025 |
| 79 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 80 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Sep 2025 |
| 81 | Cordillera Energy Partners LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 82 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 83 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 84 | Corgray Holdings, LLC | Fulshear, TX 77441 | Gas Operator | Mar 2016 |
| 85 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Sep 2025 |
| 86 | Costa Energy, LLC | Irving, TX 75063 | Oil & Gas Operator | Sep 2025 |
| 87 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 88 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2025 |
| 89 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 90 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | May 2025 |
| 91 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2025 |
| 92 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 93 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 94 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 95 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 96 | D.W.P. Production | Perryton, TX 79070 | Oil & Gas Operator | Nov 2020 |
| 97 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Sep 2025 |
| 98 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 99 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Sep 2025 |
| 100 | Davis, William H. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |