| 1 | C & A Enterprises | Ballinger, TX 76821 | Oil & Gas Operator | Jul 2025 |
| 2 | C & B Exploration, LLC | Fort Worth, TX 76179 | Oil Operator | Jul 2025 |
| 3 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Jul 2025 |
| 4 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | Jul 2025 |
| 5 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Apr 2025 |
| 6 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Jul 2025 |
| 7 | C & C Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Jul 2025 |
| 8 | C & C Petroleum Management, LLC | Abilene, TX 79601 | Oil & Gas Operator | Jul 2025 |
| 9 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 10 | C & E Oil Company | Corpus Christi, TX 78418 | Oil Operator | Jan 1989 |
| 11 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Jul 2025 |
| 12 | C & F Energy, Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 1996 |
| 13 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 14 | C & G Operating, LLC | San Antonio, TX 78209 | Oil Operator | Jul 2025 |
| 15 | C & G Petroleum, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Aug 2004 |
| 16 | C & G Transports, Inc. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2025 |
| 17 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 18 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | Jul 2025 |
| 19 | C & L Operating, Inc. | Valera, TX 76884 | Oil & Gas Operator | Jul 2025 |
| 20 | C & M Exploration LLC | Tulsa, OK 74159-1331 | Oil & Gas Operator | Jun 2014 |
| 21 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 22 | C & M Operating, Inc. (A) | Alleyton, TX 78935 | Gas Operator | Aug 2011 |
| 23 | C & N Oil Co | Monahans, TX 79756 | Oil Operator | Jul 2025 |
| 24 | C & O Production | Nocona, TX 76255 | Oil & Gas Operator | Feb 2020 |
| 25 | C & P Land Services Limited Liability Company | Los Angeles, CA 90035 | Oil Operator | Jul 2025 |
| 26 | C & R Oil Co. | Abilene, TX 79605 | Oil & Gas Operator | Jul 2025 |
| 27 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |
| 28 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | Jul 2025 |
| 29 | C And S Oil & Gas | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1998 |
| 30 | C Bar Petroleum Company | Lubbock, TX 79413 | Oil & Gas Operator | May 2018 |
| 31 | C E Energy LLC | Katy, TX 77449 | Oil Operator | Jul 2025 |
| 32 | C E L Inc | Bartlesville, OK 74006 | Oil & Gas Operator | Jan 2020 |
| 33 | C O G Company | Bangs, TX 76823 | Oil & Gas Operator | Jul 2025 |
| 34 | C Oil Co. | New Braunfels, TX 78132 | Oil & Gas Operator | Feb 2017 |
| 35 | C R I Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 1993 |
| 36 | C Rose Oil Co. | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 37 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Jul 2025 |
| 38 | C S Petroleum Inc | Norman, OK 73070 | Oil & Gas Operator | Dec 2024 |
| 39 | C&C II | Pleasanton, TX 78064 | Oil & Gas Operator | Mar 1998 |
| 40 | C&P Resources Operating Co,LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 41 | C-D Oil Company, Inc. | Cameron, TX 76520 | Oil Operator | Jul 2025 |
| 42 | C. M. Oil Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2016 |
| 43 | C. O. Oil And Gas, LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 44 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Jul 2025 |
| 45 | C.C.O. & G. Company Inc. | Austin, TX 78765 | Oil & Gas Operator | Sep 1995 |
| 46 | C.F.O., Inc. | Liberty, TX 77575 | Oil Operator | Jul 2025 |
| 47 | C.J. Oil Company | Iowa Park, TX 76367 | Oil Operator | Dec 2024 |
| 48 | C.O.W. Operating Company | Graham, TX 76450 | Oil Operator | Jul 2025 |
| 49 | C.W. Pickering, Inc. | Victoria, TX 77904 | Gas Operator | Sep 2022 |
| 50 | C5 Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2019 |
| 51 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Jul 2025 |
| 52 | Cab Resources, LLC | Odessa, TX 79762 | Oil Operator | Jul 2025 |
| 53 | Cabal Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 54 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 55 | Cabeza Oil And Gas, LLC | Austin, CO 81410 | Oil & Gas Operator | Mar 2022 |
| 56 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 57 | Cabot Oil & Gas Production Corp. | Houston, TX 77060 | Oil & Gas Operator | Jun 1996 |
| 58 | Cactus Gas & Oil, Inc. | San Antonio, TX 78259 | Oil & Gas Operator | Jul 2025 |
| 59 | Cactus Jack Operating Company | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Aug 2003 |
| 60 | Cactus Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Aug 2000 |
| 61 | Cactus Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Jul 2025 |
| 62 | Cada Operating, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2004 |
| 63 | Caddell Well Service, Inc. | Prairie Lea, TX 78661 | Oil & Gas Operator | Jul 2025 |
| 64 | Caddo Corporation | Austin, TX 78731 | Oil & Gas Operator | Jul 2025 |
| 65 | Caddo Creek Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1994 |
| 66 | Caddo Management, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 67 | Caddo Operating Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jul 2025 |
| 68 | Cadence Energy Partners, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Jun 2010 |
| 69 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Jul 2025 |
| 70 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Jul 2025 |
| 71 | Cain, L. L. & White, Wayne R. | Lubbock, TX 79407 | Oil & Gas Operator | Apr 2005 |
| 72 | Caird Operating, LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Jul 2025 |
| 73 | Cal Oil Company | Missouri City, TX 77459 | Oil Operator | May 2022 |
| 74 | Cal-Mon Oil Company | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 75 | Cal-T Oil Company, Incorporated | Borger, TX 79008 | Oil & Gas Operator | Feb 2008 |
| 76 | Cal-Tex Exploration & Production Company LLC | San Antonio, TX 78228 | Oil & Gas Operator | Jul 2025 |
| 77 | Cal-Tex Fossil, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 78 | Cal-Tex Gas Transmission Co,Inc. | Mabank, TX 75147 | Oil & Gas Operator | Nov 1999 |
| 79 | Cal-Tex Operating Co. | Manchaca, TX 78652 | Oil & Gas Operator | May 2020 |
| 80 | Calame, Richard | Devine, TX 78016 | Oil Operator | Jul 2025 |
| 81 | Caldera Operating Company LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2021 |
| 82 | Caldwell Production Co. Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2010 |
| 83 | Caldwell, J. A. | San Antonio, TX 78223 | Oil & Gas Operator | Jun 2000 |
| 84 | Calfas Cattle & Oil, LLC | San Antonio, TX 78205 | Oil & Gas Operator | Jul 2025 |
| 85 | Calfas Oil, LLC | San Antonio, TX 78205 | Oil Operator | Jul 2025 |
| 86 | Calhoun & Ellison Oil Co. | San Antonio, TX 78248 | Oil & Gas Operator | Dec 1997 |
| 87 | Cali Crude LLC | Austin, TX 78738 | Oil Operator | Jul 2025 |
| 88 | Calico Operating Co., Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2002 |
| 89 | Caliente Oil LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Jul 2025 |
| 90 | Calima Energy LLC | Electra, TX 76360 | Oil Operator | Jul 2025 |
| 91 | Calistoga Energy Reserves, LLC | Houston, TX 77063 | Oil & Gas Operator | Jul 2025 |
| 92 | Calk Oil Company | Lytle, TX 78052 | Oil Operator | Jul 2025 |
| 93 | Calk Operating, LLC | Lytle, TX 78052 | Oil Operator | Jul 2025 |
| 94 | Calk, Roger D. | Lytle, TX 78052 | Oil & Gas Operator | Jul 2025 |
| 95 | Callahan Land Company | Richardson, TX 75081 | Oil & Gas Operator | Sep 2020 |
| 96 | Callarman, David | Cisco, TX 76437 | Oil & Gas Operator | Jul 2025 |
| 97 | Callaway Production Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 98 | Calley, Bob | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 99 | Callon (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2023 |
| 100 | Callon (Permian) LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |