| 1 | C & A Enterprises | Ballinger, TX 76821 | Oil & Gas Operator | May 2025 |
| 2 | C & A Oil Company | Edmond, OK 73013-9413 | Oil & Gas Operator | Mar 2015 |
| 3 | C & B Energy Resources | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 4 | C & B Exploration Company, Inc. | | Oil & Gas Operator | Oct 2008 |
| 5 | C & B Exploration, LLC | Fort Worth, TX 76179 | Oil Operator | May 2025 |
| 6 | C & B Oil Company | Drumright, OK 74030 | Oil & Gas Operator | Mar 2025 |
| 7 | C & B Operating Inc. | St John, KS 67576 | Oil & Gas Operator | Jan 2025 |
| 8 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | May 2025 |
| 9 | C & C Downhole, LLC | Richmond, KY 40475 | Oil & Gas Operator | Dec 2023 |
| 10 | C & C Minerals LTD | | Oil & Gas Operator | Dec 2019 |
| 11 | C & C Oil | | Oil & Gas Operator | Jan 2004 |
| 12 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | May 2025 |
| 13 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Feb 2025 |
| 14 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | May 2025 |
| 15 | C & C Operating, Inc. | | Oil Operator | Dec 2024 |
| 16 | C & C Operating, LLC | Iowa Park, TX 76367 | Oil Operator | May 2025 |
| 17 | C & C Petroleum Management, LLC | Abilene, TX 79601 | Oil & Gas Operator | May 2025 |
| 18 | C & C Producing LLC | Creston, OH 44217 | Oil & Gas Operator | Dec 2024 |
| 19 | C & C Productions LLC | Muskogeee, OK 74402 | Oil & Gas Operator | Feb 2025 |
| 20 | C & C Tank Service LLC | | Oil & Gas Operator | Sep 2022 |
| 21 | C & C Tank Service, Inc. | Sterling, KS 67579 | Oil Operator | Oct 2020 |
| 22 | C & C Tank Truck Service Inc | Holdenville, OK 74848 | Oil Operator | Feb 2012 |
| 23 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 24 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 25 | C & D Gas Co | Apollo, PA 15613-9714 | Oil & Gas Operator | Dec 2024 |
| 26 | C & D Oil & Gas LLC | Dorset, OH 44032 | Oil & Gas Operator | Dec 2024 |
| 27 | C & D Resources, Inc. | | Oil & Gas Operator | Nov 2001 |
| 28 | C & D Supply LLC | Cherokee, OK 73728-5817 | Oil & Gas Operator | Mar 2025 |
| 29 | C & E Oil Company | Corpus Christi, TX 78418 | Oil Operator | Jan 1989 |
| 30 | C & E Oil, LLC | Grenola, KS 67346 | Oil Operator | Nov 2021 |
| 31 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | May 2025 |
| 32 | C & E Prod Incor | | Oil Operator | Nov 1996 |
| 33 | C & F Energy, Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 1996 |
| 34 | C & F Oil Company, Inc. | | Oil Operator | Jan 2025 |
| 35 | C & F Petroleum | | Oil & Gas Operator | Apr 1991 |
| 36 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 37 | C & F Ranch LLC | Iola, KS 66749 | Oil Operator | Dec 2024 |
| 38 | C & G Drilling, Inc. | Eureka, KS 67045 | Oil Operator | Jan 2025 |
| 39 | C & G Energy Inc | | Oil & Gas Operator | Jun 1996 |
| 40 | C & G Oil Compan | | Oil & Gas Operator | Dec 1989 |
| 41 | C & G Operating, LLC | San Antonio, TX 78209 | Oil Operator | May 2025 |
| 42 | C & G Petroleum, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Aug 2004 |
| 43 | C & G Transports, Inc. | Woodson, TX 76491 | Oil & Gas Operator | May 2025 |
| 44 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 45 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 46 | C & H Oil LLC | Greensburg, KY 42743 | Oil Operator | Dec 2023 |
| 47 | C & H Well Servicing Inc | Gillette, WY 82717 | Oil & Gas Operator | Apr 2025 |
| 48 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 49 | C & J Field Services | | Oil & Gas Operator | Mar 2025 |
| 50 | C & J Oil | | Oil & Gas Operator | Feb 2025 |
| 51 | C & J Production LLC | Marion, KS 66861 | Oil & Gas Operator | Jan 2025 |
| 52 | C & J Pumping, Inc. | Sylvia, KS 67581 | Oil & Gas Operator | Dec 2009 |
| 53 | C & J Trucks LLC | Seminole, OK 74868-5406 | Oil & Gas Operator | Apr 2025 |
| 54 | C & J Well No 1 And C & J Well No 2 | Philippi, WV 26416 | Gas Operator | Dec 2021 |
| 55 | C & K Offshore Company | | Oil & Gas Operator | Oct 1980 |
| 56 | C & K Operating LLC | Kingman, KS 67068 | Oil & Gas Operator | Jan 2025 |
| 57 | C & K Petroleum | | Oil & Gas Operator | Jan 1984 |
| 58 | C & K Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 1984 |
| 59 | C & L Drilling Company | Ada, OK 74821-1252 | Oil & Gas Operator | Jan 2014 |
| 60 | C & L Enterprise Of Wagoner | Coweta, OK 74429-9657 | Oil Operator | Mar 2001 |
| 61 | C & L Enterprises Inc | Lindsay, OK 73052 | Oil & Gas Operator | Feb 2025 |
| 62 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Mar 2025 |
| 63 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | May 2025 |
| 64 | C & L Operating, Inc. | Valera, TX 76884 | Oil & Gas Operator | May 2025 |
| 65 | C & M Exploration LLC | Tulsa, OK 74159-1331 | Oil & Gas Operator | Jun 2014 |
| 66 | C & M Oil Co. & Investments | | Oil & Gas Operator | Feb 2025 |
| 67 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Feb 2025 |
| 68 | C & M Operating, Inc. (A) | Alleyton, TX 78935 | Gas Operator | Aug 2011 |
| 69 | C & N Oil & Gas Company | Albany, OH 45710 | Oil & Gas Operator | Dec 2012 |
| 70 | C & N Oil Co | Monahans, TX 79756 | Oil Operator | May 2025 |
| 71 | C & N Royalties, L.L.C. | | Oil & Gas Operator | Oct 2015 |
| 72 | C & O Production | Nocona, TX 76255 | Oil & Gas Operator | Feb 2020 |
| 73 | C & P Energy Inc | Hampton, AR 71744 | Oil Operator | Dec 2014 |
| 74 | C & P Land Services Limited Liability Company | Los Angeles, CA 90035 | Oil Operator | May 2025 |
| 75 | C & P Oil & Gas Company, Inc. | Clarksburg, WV 26301-0000 | Oil & Gas Operator | Dec 2021 |
| 76 | C & R Drilling C | | Oil Operator | Aug 1994 |
| 77 | C & R Oil | | Oil Operator | Jan 2025 |
| 78 | C & R Oil Co. | Abilene, TX 79605 | Oil & Gas Operator | May 2025 |
| 79 | C & R Petroleum Co. | Duncan, OK 73533-1341 | Oil & Gas Operator | Feb 2025 |
| 80 | C & R Well Servi | | Oil Operator | Sep 1996 |
| 81 | C & R Well Service, A General Partnership | Garnett, KS 66032 | Oil Operator | Dec 2009 |
| 82 | C & S Energy Corp | Liverpool, NY 13088 | Oil & Gas Operator | Dec 1986 |
| 83 | C & S Oil | | Oil Operator | Dec 2019 |
| 84 | C & S Oil Compan | | Oil & Gas Operator | Jun 1992 |
| 85 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |
| 86 | C & S Oil Company, LLC | Russell, KS 67665 | Oil Operator | Jan 2025 |
| 87 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | May 2025 |
| 88 | C & S Properties | | Oil & Gas Operator | Jun 1996 |
| 89 | C & S Well Servi | | Oil & Gas Operator | Nov 1995 |
| 90 | C & S Well Servicing Co. | Lyons, KS 67554 | Oil & Gas Operator | Jul 2000 |
| 91 | C & T Energy Co | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2004 |
| 92 | C & T Energy LLC | Morris, OK 74445-2667 | Oil & Gas Operator | Feb 2025 |
| 93 | C & T Energy Of East Canton Inc | East Canton, OH 44730 | Oil & Gas Operator | Dec 2024 |
| 94 | C & V Oil And Gas | Marietta, OH 45750 | Oil & Gas Operator | Dec 2011 |
| 95 | C & VC, Inc. | | Oil & Gas Operator | Sep 1991 |
| 96 | C & W Oil Inc | | Oil & Gas Operator | Aug 2016 |
| 97 | C & W Operating LLC | Tulsa, OK 74145-7627 | Oil Operator | May 2020 |
| 98 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 99 | C A P Operating | | Oil Operator | Sep 1992 |
| 100 | C And D Explorations LLC | | Oil Operator | Apr 2025 |