| 1 | 4P Energy Texas, LLC | Denver, CO 80206 | Oil & Gas Operator | Nov 2020 |
| 2 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 3 | Amarillo Exploration, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Sep 2026 |
| 4 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 5 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 6 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 7 | Anadarko Minerals, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 8 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2026 |
| 9 | Arbol Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | Sep 2026 |
| 10 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 11 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 12 | Arrington Production Company | Pampa, TX 79066 | Oil & Gas Operator | Sep 2026 |
| 13 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 14 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 15 | Athena Energy, Inc. | Gallatin, TN 37066 | Oil & Gas Operator | Sep 2026 |
| 16 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 17 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Sep 2026 |
| 18 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Sep 2026 |
| 19 | B&E Exploration, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2009 |
| 20 | Balcones Production Company | Houston, TX 77002 | Oil & Gas Operator | Feb 1996 |
| 21 | Bannon Energy Inc | Houston, TX 77068 | Oil & Gas Operator | Jun 1998 |
| 22 | Barbour Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Sep 2026 |
| 23 | Batton Oil & Gas, LLC | Spearman, TX 79081 | Oil & Gas Operator | Sep 2026 |
| 24 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 25 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2026 |
| 26 | Be Anadarko II, LLC | Austin, TX 78731 | Oil & Gas Operator | Sep 2026 |
| 27 | Benson-McCown & Company | Amarillo, TX 79114 | Oil & Gas Operator | Jul 2016 |
| 28 | Berexco Inc. | Wichita, KS 67208 | Oil & Gas Operator | Oct 2009 |
| 29 | Black'S Oil & Gas | Borger, TX 79008 | Oil & Gas Operator | Sep 2026 |
| 30 | Bo-MC Resources Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Apr 2005 |
| 31 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | Feb 2026 |
| 32 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2026 |
| 33 | Bracken Energy Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2015 |
| 34 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 35 | Bradmar Petroleum Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 36 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 37 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 38 | Breitburn Operating LP | Keithville, LA 71047 | Oil & Gas Operator | Sep 2026 |
| 39 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2026 |
| 40 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 41 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 42 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 43 | Brighton Energy, L.L.C. | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 44 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 45 | Brown & Borelli, Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Sep 2026 |
| 46 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 47 | Buck Production Co LLC | Bristow, OK 74010 | Oil & Gas Operator | Sep 2023 |
| 48 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 49 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 50 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | May 2026 |
| 51 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Sep 2026 |
| 52 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Oct 2025 |
| 53 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | Sep 2026 |
| 54 | Carson Buckles Exploration LLC | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2026 |
| 55 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 56 | Castle Operating LLC | Oklahoma City, OK 73114-7444 | Oil & Gas Operator | May 2026 |
| 57 | Central Texas Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 58 | Chalker Operating Inc. | Richmond, TX 77406 | Oil & Gas Operator | Jul 2016 |
| 59 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 60 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 61 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2026 |
| 62 | Chesapeake Exploration LLC | Oklahoma City, OK 731540496 | Oil & Gas Operator | Jul 2020 |
| 63 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2026 |
| 64 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2026 |
| 65 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2026 |
| 66 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 67 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 68 | Cimarex Energy Co Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jun 2026 |
| 69 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Jun 2026 |
| 70 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Dec 2025 |
| 71 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 72 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 73 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 74 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 75 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 76 | Colemanite, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Sep 2026 |
| 77 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 78 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 79 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Jul 2026 |
| 80 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 81 | Continental Exploration LLC | Richardson, TX 75080 | Oil & Gas Operator | Sep 2026 |
| 82 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Sep 2026 |
| 83 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Sep 2026 |
| 84 | Coop Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 85 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 86 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 87 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Sep 2026 |
| 88 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 89 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 90 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 91 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 92 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 93 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 94 | Credo Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jan 2013 |
| 95 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | May 2026 |
| 96 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2026 |
| 97 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 98 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 99 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 100 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |