| 1 | C & B Exploration Company, Inc. | | Oil & Gas Operator | Oct 2008 |
| 2 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Feb 2026 |
| 3 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | Feb 2026 |
| 4 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 5 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | Feb 2026 |
| 6 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Nov 2025 |
| 7 | C & N Royalties, L.L.C. | | Oil & Gas Operator | Oct 2015 |
| 8 | C & S Properties | | Oil & Gas Operator | Jun 1996 |
| 9 | C G Davis, Et Al | | Oil & Gas Operator | Mar 1986 |
| 10 | C N Operating Co | Drumright, OK 74030 | Oil & Gas Operator | Nov 1998 |
| 11 | C. H. C. Gerard | | Oil & Gas Operator | Jan 2025 |
| 12 | C. J. Broome Oil Company | | Oil & Gas Operator | Jan 2020 |
| 13 | C. L. Morris | | Oil Operator | Feb 2004 |
| 14 | C. L. Morris, Inc. | | Oil & Gas Operator | Feb 2004 |
| 15 | C. M. Frizzell | | Oil & Gas Operator | Mar 2014 |
| 16 | C. W. Brumley | | Oil & Gas Operator | Jun 2006 |
| 17 | C. Wayland Brooks | | Oil & Gas Operator | Dec 1987 |
| 18 | C.J. Oil Company | Iowa Park, TX 76367 | Oil Operator | Jan 2025 |
| 19 | C.P.I. | | Oil & Gas Operator | Oct 2007 |
| 20 | Caddeaux Gathering, LLC | | Oil Operator | Dec 2024 |
| 21 | Caddo Gas Processing L.L.C. | | Oil Operator | Aug 2012 |
| 22 | Caddo Oil & Gas Co., Inc. | | Oil Operator | Jul 1990 |
| 23 | Caddo Oil Co.,Inc. | | Oil & Gas Operator | Apr 1987 |
| 24 | Caddo Parish Holdings LLC | | Oil & Gas Operator | Jul 2020 |
| 25 | Caddo Petroleum Dev., Inc. | | Oil Operator | Aug 1986 |
| 26 | Caddo Pine Island Corp. | | Oil & Gas Operator | Sep 1997 |
| 27 | Caddo Pine Island Operating Co | | Oil & Gas Operator | Aug 1998 |
| 28 | Caddo Resources Inc | | Oil & Gas Operator | Dec 1986 |
| 29 | Caddo Western Development, Inc | | Oil & Gas Operator | Aug 1984 |
| 30 | Cadillac Operating Company, LLC | | Oil Operator | Jan 2025 |
| 31 | Caldwell & Self | | Oil Operator | Dec 2024 |
| 32 | Caldwell & Trahan | | Oil Operator | Dec 2024 |
| 33 | Caldwell Oil Company | | Oil Operator | Jul 2012 |
| 34 | Caldwell Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 35 | Caldwell Production | | Oil Operator | Dec 2024 |
| 36 | Caldwell-Bayou State | | Oil Operator | Dec 2024 |
| 37 | Calumet Lubricants Company | | Oil Operator | Dec 1993 |
| 38 | Calumet Refining Co. | | Oil Operator | May 1991 |
| 39 | Camar Exploration | | Oil Operator | Jan 1989 |
| 40 | Camco Resources, Inc. | | Oil Operator | Aug 1991 |
| 41 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Feb 2026 |
| 42 | Cannon Operating Company LLC | Garland, TX 75043 | Oil Operator | Feb 2026 |
| 43 | Canstar Oil & Gas, Inc. | | Oil & Gas Operator | Dec 1994 |
| 44 | Cap Production | | Oil Operator | Dec 2024 |
| 45 | Carder Oil Company | | Oil & Gas Operator | Dec 2024 |
| 46 | Carmel Petroleum | | Gas Operator | Dec 1990 |
| 47 | Carter & Rorex | | Oil Operator | Dec 1991 |
| 48 | Caruthers Producing Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2019 |
| 49 | Cathey Oil, Inc. | | Oil & Gas Operator | Aug 2009 |
| 50 | Cecil Brand | | Oil & Gas Operator | Mar 2002 |
| 51 | Centerpoint Energy FLD Ser Inc | | Oil Operator | Feb 2011 |
| 52 | Century Energy, Inc. | | Oil & Gas Operator | Aug 1989 |
| 53 | Century Oil, Inc. | | Oil Operator | Apr 2022 |
| 54 | Chanse Energy Corporation | Shreveport, LA 71165-1572 | Oil & Gas Operator | Sep 2021 |
| 55 | Chaparral Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2009 |
| 56 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2026 |
| 57 | Chaparral Expl & C L Morris In | | Oil & Gas Operator | Nov 1994 |
| 58 | Chaparral Exploration, Inc. | | Oil & Gas Operator | Jun 2000 |
| 59 | Chaparral Operating, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Feb 2026 |
| 60 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 61 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 62 | Chiles Oil Field Supply | | Oil & Gas Operator | Jan 2025 |
| 63 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 64 | Cimic Energy, LLC | | Oil Operator | Jan 2025 |
| 65 | Cinder Production Company | | Oil & Gas Operator | Apr 2014 |
| 66 | Cities Service Company | | Oil & Gas Operator | Mar 1983 |
| 67 | Cities Service Oil & Gas Corp | | Oil & Gas Operator | Mar 1988 |
| 68 | Cities Service Oil Co. | | Oil & Gas Operator | Dec 1986 |
| 69 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 70 | Claude Debeaux, Jr. Et Al | | Oil Operator | Dec 1999 |
| 71 | Clear Lake Oil Co. | | Oil Operator | Jan 2025 |
| 72 | Clements Energy, Inc. | | Oil & Gas Operator | Oct 1987 |
| 73 | CM Oil Co., L.L.C. | | Oil Operator | Jan 2025 |
| 74 | Cohen & Kosovitz | | Oil & Gas Operator | May 1998 |
| 75 | Compass Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 76 | Comstock Oil & Gas -- La, Inc. | | Oil & Gas Operator | Mar 2005 |
| 77 | Comstock Oil & Gas--La, LLC | | Oil & Gas Operator | Dec 2024 |
| 78 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 79 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 80 | Conquest Petroleum Inc | | Oil & Gas Operator | Nov 2014 |
| 81 | Consolidated Energy Inv., Inc. | | Oil & Gas Operator | Oct 2013 |
| 82 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 83 | Cook Production LLC | | Oil Operator | Jan 2025 |
| 84 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 85 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 86 | Courtney Oil Co. | | Oil Operator | Dec 1998 |
| 87 | Covey Park Gas LLC | | Oil & Gas Operator | Aug 2019 |
| 88 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 89 | Coy W. Hale | | Oil Operator | Nov 2024 |
| 90 | Cpi 5, L.L.C | | Oil Operator | Dec 2023 |
| 91 | Cpi Operating Co. | | Oil & Gas Operator | Mar 2003 |
| 92 | Cpi Operating Company, LLC | | Oil Operator | Jan 2025 |
| 93 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Feb 2026 |
| 94 | Creslenn Oil Co | | Oil & Gas Operator | Nov 1998 |
| 95 | Crestmont Operating LLC | New York, NY 10151 | Oil Operator | Feb 2026 |
| 96 | Crow-Eason | | Oil & Gas Operator | Feb 1984 |
| 97 | Crow-Pittman | | Oil Operator | Aug 1993 |
| 98 | Crowder Oil Co. | | Oil Operator | Sep 2008 |
| 99 | Crowder Oil L.L.C. | | Oil Operator | Apr 2015 |
| 100 | Crumpler Oil | | Oil & Gas Operator | Nov 2024 |