| 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 | Sep 2025 |
| 4 | 5H Oil Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 5 | 801 LLC | Artesia, NM 88211 | Oil & Gas Operator | Oct 2023 |
| 6 | A & C Oil Company, LLC | Stockdale, TX 78160 | Oil Operator | Sep 2025 |
| 7 | Aberlour Operating Inc. | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 8 | Adams, R. W. & Son | Amarillo, TX 79109 | Oil & Gas Operator | Oct 1996 |
| 9 | Aikman Oil Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | Sep 2025 |
| 10 | Aladdin Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2021 |
| 11 | Alfaro Oil & Gas | Burkburnett, TX 76354 | Oil & Gas Operator | Sep 2025 |
| 12 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 13 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 14 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 15 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 16 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 17 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 18 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 19 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 20 | Apc Operating Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Oct 1996 |
| 21 | Arcadia Energy Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 22 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 23 | Arrowhead Resources, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 24 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 25 | Athena Energy, Inc. | Gallatin, TN 37066 | Oil & Gas Operator | Sep 2025 |
| 26 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2025 |
| 27 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Sep 2025 |
| 28 | B & B Farm Industries, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2002 |
| 29 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Sep 2025 |
| 30 | Baker, Brent Oil & Gas, Inc. | Oklahoma City, OK 73149 | Oil & Gas Operator | Sep 2025 |
| 31 | Barker Production Co. | Shamrock, TX 79079 | Oil & Gas Operator | Mar 2010 |
| 32 | Barker Production Co., LP | San Angelo, TX 76904 | Oil & Gas Operator | Sep 2025 |
| 33 | Barker, Rodney | Shamrock, TX 79079 | Oil & Gas Operator | Aug 2012 |
| 34 | Barrett Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 35 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Sep 2025 |
| 36 | Batton Oil & Gas, LLC | Spearman, TX 79081 | Oil & Gas Operator | Sep 2025 |
| 37 | Baytide Petr. Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 1997 |
| 38 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 39 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2025 |
| 40 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2025 |
| 41 | Beaver Oil Company Inc | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2020 |
| 42 | Benson-McCown & Company | Amarillo, TX 79114 | Oil & Gas Operator | Jul 2016 |
| 43 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 44 | Bison Petroleum Corporation | Amarillo, TX 79121 | Oil & Gas Operator | Mar 1996 |
| 45 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 46 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Sep 2025 |
| 47 | Blakemore, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Dec 2012 |
| 48 | Blue Dolphin Production LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2025 |
| 49 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | May 2025 |
| 50 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 51 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 52 | Bracken Energy Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2015 |
| 53 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2025 |
| 54 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 55 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 56 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 57 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 58 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 59 | Bronco Oil Company | San Angelo, TX 76904 | Oil & Gas Operator | Dec 2024 |
| 60 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 61 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 62 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 63 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Sep 2025 |
| 64 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 65 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 66 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Sep 2025 |
| 67 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 68 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Sep 2025 |
| 69 | Cambridge Production, Inc. | Amarillo, TX 79120 | Oil & Gas Operator | Nov 2020 |
| 70 | Caprock Engineering, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2018 |
| 71 | Cascade Resources LLC | Edmond, OK 73083 | Oil & Gas Operator | Jul 2025 |
| 72 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Jun 2025 |
| 73 | Caspen Oil, Inc. | Denver, CO 80226 | Oil & Gas Operator | Jul 1993 |
| 74 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 75 | Castle Operating LLC | Oklahoma City, OK 73114-7444 | Oil & Gas Operator | May 2025 |
| 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 2025 |
| 78 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 79 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 80 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 81 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 82 | Cimarex Energy Co. | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 83 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 84 | Circle W Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 85 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 86 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 87 | Close, Bryan H. | Shamrock, TX 79079 | Gas Operator | Sep 2025 |
| 88 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 89 | Cofer & Crawford | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 90 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 91 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | Sep 2025 |
| 92 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 93 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 94 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 95 | Cordillera Energy Partners LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 96 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 97 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 98 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 99 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 100 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | May 2025 |