| 1 | 4P Energy Texas, LLC | Denver, CO 80206 | Oil & Gas Operator | Nov 2020 |
| 2 | 5H Oil Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 3 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Sep 2026 |
| 4 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | May 2026 |
| 5 | Aikman Oil Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | Sep 2026 |
| 6 | Aladdin Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2021 |
| 7 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 8 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2026 |
| 9 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 10 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 11 | Amarillo Exploration, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Sep 2026 |
| 12 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 13 | Amedan Resources, Inc. | Chickasha, OK 73023 | Oil & Gas Operator | Mar 2008 |
| 14 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 15 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 16 | Anadarko Minerals, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 17 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 18 | Ananda Energy Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2021 |
| 19 | Anderman/Smith Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1995 |
| 20 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 21 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2026 |
| 22 | Aquila Energy Resources Corp. | Houston, TX 77042 | Oil & Gas Operator | Nov 2013 |
| 23 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 24 | Arnold Oil Properties, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2019 |
| 25 | Arnold Oil Properties, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Sep 2026 |
| 26 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 27 | Arrowhead Resources, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 28 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 29 | Athena Energy, Inc. | Gallatin, TN 37066 | Oil & Gas Operator | Sep 2026 |
| 30 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 31 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Sep 2026 |
| 32 | B & B Farm Industries, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2002 |
| 33 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 34 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Sep 2026 |
| 35 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 36 | Bannon Energy Inc | Houston, TX 77068 | Oil & Gas Operator | Jun 1998 |
| 37 | Barbee, Bill J. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 1994 |
| 38 | Barbour Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Sep 2026 |
| 39 | Barrett Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Aug 2003 |
| 40 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Sep 2026 |
| 41 | Batton Oil & Gas, LLC | Spearman, TX 79081 | Oil & Gas Operator | Sep 2026 |
| 42 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2026 |
| 43 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2026 |
| 44 | Be Anadarko II, LLC | Austin, TX 78731 | Oil & Gas Operator | Sep 2026 |
| 45 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | May 2026 |
| 46 | Benn Oil & Gas | Perryton, TX 79070 | Oil & Gas Operator | Jun 2005 |
| 47 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 48 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 49 | Black Boar Operating LLC | Canadian, TX 79014 | Oil & Gas Operator | Sep 2026 |
| 50 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 51 | Blackrock Energy LLC | Wagoner, OK 74467 | Oil Operator | Apr 2025 |
| 52 | Bo-MC Resources Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Apr 2005 |
| 53 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 54 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2026 |
| 55 | Bracken Energy Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2015 |
| 56 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 57 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 58 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 59 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 60 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 61 | Brighton Energy, L.L.C. | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 62 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 63 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 64 | Burgess, W. E. | Fort Worth, TX 76147 | Oil & Gas Operator | Sep 2026 |
| 65 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Sep 2026 |
| 66 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 67 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 68 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | May 2026 |
| 69 | Cambridge Production, Inc. | Amarillo, TX 79120 | Oil & Gas Operator | Nov 2020 |
| 70 | Campbell Energy LLC | Carmi, IL 62821 | Oil Operator | Apr 2026 |
| 71 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Oct 2025 |
| 72 | Capstone Cactus Operating Comp. | Hennessey, OK 73742 | Oil & Gas Operator | Sep 2026 |
| 73 | Castle Operating LLC | Oklahoma City, OK 73114-7444 | Oil & Gas Operator | May 2026 |
| 74 | Centurion Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 75 | CH-Seon Inc. | Dallas, TX 75251 | Oil & Gas Operator | Sep 2026 |
| 76 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 77 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 78 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2026 |
| 79 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2026 |
| 80 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2026 |
| 81 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2026 |
| 82 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 83 | Cimarex Energy Co Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jun 2026 |
| 84 | Cimrod, LLC | Houston, TX 77269 | Gas Operator | Sep 2026 |
| 85 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Dec 2025 |
| 86 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 87 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 88 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 89 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 90 | Comanche Operating Co. | Oklahoma City, OK 73120 | Oil & Gas Operator | Aug 2002 |
| 91 | Commonwealth Resources, LLC | Fort Collins, CO 80524 | Oil Operator | Dec 2008 |
| 92 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 93 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 94 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Sep 2026 |
| 95 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Sep 2026 |
| 96 | Coop Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 97 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 98 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 99 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 100 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Sep 2026 |