| 1 | C & B Oil Company | Drumright, OK 74030 | Oil & Gas Operator | May 2025 |
| 2 | C & C Productions LLC | Muskogeee, OK 74402 | Oil & Gas Operator | Jun 2025 |
| 3 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 4 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | Sep 2025 |
| 5 | C E L Inc | Bartlesville, OK 74006 | Oil & Gas Operator | Jan 2020 |
| 6 | C Rose Oil Co. | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 7 | Cajeza Energy | Drumright, OK 74030 | Oil & Gas Operator | May 2013 |
| 8 | Caldwell Engineering & Construction Inc | Chandler, OK 74834-5420 | Oil & Gas Operator | Jan 2025 |
| 9 | Calumet Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2019 |
| 10 | Calvert Operating LLC | Oklahoma City, OK 73118 | Oil Operator | Jun 2025 |
| 11 | Calyx Energy LLC | Tulsa, OK 74146-3807 | Oil & Gas Operator | Feb 2020 |
| 12 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 13 | Camo Oil LLC | Stillwater, OK 74074 | Oil & Gas Operator | Jun 2025 |
| 14 | Candy Oil Production | Sand Springs, OK 74063-3410 | Oil Operator | Feb 2017 |
| 15 | Cane Creek Energy Partners Inc | Morris, OK 74445 | Oil & Gas Operator | May 2025 |
| 16 | Cannuck Resources Inc | Nowata, OK 74048 | Oil & Gas Operator | Aug 2000 |
| 17 | Canok International Inc | Okmulgee, OK 74447 | Oil & Gas Operator | May 2025 |
| 18 | Cantrell Energy Corporation | Ada, OK 74820-0835 | Oil & Gas Operator | Jun 2025 |
| 19 | Cantrell Robert R | Ada, OK 74820 | Oil & Gas Operator | May 2025 |
| 20 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Jun 2025 |
| 21 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 22 | Cardinal Oil LLC | Drumright, OK 74030 | Oil & Gas Operator | Apr 2025 |
| 23 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 24 | Carman Robert W | Bristow, OK 74010-3454 | Oil & Gas Operator | May 2025 |
| 25 | Carpenter Luther | Skiatook, OK 74070-9124 | Oil & Gas Operator | May 2025 |
| 26 | Carpenter R L | Sapulpa, OK 74067-0452 | Oil Operator | Mar 2007 |
| 27 | Carroll M R Dba Carroll Production Company | Sapulpa, OK 74066 | Oil & Gas Operator | Jun 2025 |
| 28 | Cartledge & Cartledge Oil Company Inc | Kiefer, OK 74041 | Oil & Gas Operator | Jun 2025 |
| 29 | Cartledge Energy LLC | Sapulpa, OK 74066-6623 | Oil & Gas Operator | May 2025 |
| 30 | Casey Musgrove Oil Company Inc | Ponca City, OK 74602 | Oil & Gas Operator | May 2025 |
| 31 | Cassidy Jr John | Stroud, OK 74079-0200 | Oil & Gas Operator | Nov 2014 |
| 32 | Castella Inc | Bartlesville, OK 74003-3712 | Oil & Gas Operator | Jun 2025 |
| 33 | Cayman Resources Corporation | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 34 | CBL Resources LLC | Tulsa, OK 74136-6308 | Oil & Gas Operator | Jun 2025 |
| 35 | CDG Inc | Sapulpa, OK 74066-6339 | Oil Operator | Oct 2020 |
| 36 | CDS Oil Company | Tulsa, OK 74147-1514 | Oil & Gas Operator | Mar 2015 |
| 37 | Centennial Resources Inc | Drumright, OK 74030-1234 | Oil & Gas Operator | Dec 2007 |
| 38 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | May 2025 |
| 39 | Cewell Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 40 | Chambers & Hendrix Oil & Gas | Skiatook, OK 74070-0726 | Oil & Gas Operator | Aug 2022 |
| 41 | Chanse Energy Corporation | Shreveport, LA 71165-1572 | Oil & Gas Operator | Sep 2021 |
| 42 | Chanse Petroleum Corporation | New York, NY 10165-1134 | Oil & Gas Operator | Feb 2015 |
| 43 | Chapman Jim | Bristow, OK 74010-1173 | Oil Operator | Apr 2021 |
| 44 | Chapman Oil Company | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 45 | Cherokee Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 46 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | May 2025 |
| 47 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 48 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 49 | Chief Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 1995 |
| 50 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | May 2025 |
| 51 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 52 | Cimarron River Operating Co | Mannford, OK 74044 | Oil & Gas Operator | May 2025 |
| 53 | Circle 9 Resources LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jun 2025 |
| 54 | Circle K Oil & Gas Inc | Sand Springs, OK 74063 | Oil & Gas Operator | May 2025 |
| 55 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Sep 2025 |
| 56 | Civic Energy Corporation | Colony, OK 73021 | Oil & Gas Operator | Jun 2025 |
| 57 | CK Resources | Cleveland, OK 74020-0772 | Oil Operator | Aug 2013 |
| 58 | Claborn Julia | Okmulgee, OK 74447-9781 | Oil & Gas Operator | Mar 2022 |
| 59 | Claremont Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2017 |
| 60 | Clark Operating Services, Inc. | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 61 | Clark Well Service | Depew, OK 74028-0296 | Oil & Gas Operator | Aug 2013 |
| 62 | Claybrook Drilling Co Inc | | Oil & Gas Operator | Sep 2014 |
| 63 | Clear Creek Royalty LLC | Tulsa, OK 74137 | Oil & Gas Operator | Jul 2023 |
| 64 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 65 | Clemishire Don | Hominy, OK 74035 | Oil & Gas Operator | May 2025 |
| 66 | Click Betty | Stigler, OK 74462-0081 | Oil & Gas Operator | Feb 2016 |
| 67 | Cliffwood Production Co. | Houston, TX 77090 | Oil & Gas Operator | Aug 2013 |
| 68 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 69 | Cmo LLC | Cleveland, OK 74020 | Oil & Gas Operator | May 2025 |
| 70 | CMT Oil & Gas Company Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | May 2025 |
| 71 | CMT Operating LLC | Cleveland, OK 74020-0113 | Oil & Gas Operator | Mar 2015 |
| 72 | CN Operating Company | Drumright, OK 74030 | Oil & Gas Operator | Nov 1998 |
| 73 | Colorado Gas Compression Inc | Longmont, CO 80501-5868 | Oil & Gas Operator | Aug 2013 |
| 74 | Colpitt Brothers Oil | Collinsville, OK 74021 | Oil & Gas Operator | Apr 2020 |
| 75 | Colpitt C H Drilling Co LLC | Collinsville, OK 74021-7107 | Oil Operator | May 2025 |
| 76 | Colpitt Chas H Drilling Co | Collinsville, OK 74021-7105 | Oil & Gas Operator | Mar 2012 |
| 77 | Colt Oil LLC | Sapulpa, OK 74066-1010 | Oil Operator | May 2025 |
| 78 | Combs Production LLC | Depew, OK 74028-0483 | Oil & Gas Operator | May 2025 |
| 79 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 80 | Confederate Bay LLC | Okemah, OK 74859 | Oil & Gas Operator | Jun 2025 |
| 81 | Conn-Okla Producing Co Inc | | Oil & Gas Operator | Nov 1992 |
| 82 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 83 | Consolidated Peto Equity LTD | La Crescenta, CA 91214 | Oil & Gas Operator | Dec 1996 |
| 84 | Consolidated Properties | Tulsa, OK 74129 | Oil & Gas Operator | Jan 2017 |
| 85 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Sep 2025 |
| 86 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Sep 2025 |
| 87 | Contreras Al Consultants Inc | Oklahoma City, OK 73113-0762 | Oil & Gas Operator | Oct 2020 |
| 88 | Cooke County Production Company | Shawnee, OK 74801-1800 | Oil & Gas Operator | Jan 2022 |
| 89 | Cornelius Oil Company | Kellyville, OK 74039-0459 | Oil & Gas Operator | Jul 2015 |
| 90 | Cornelius Oil Inc | Kellyville, OK 74039 | Oil & Gas Operator | May 2025 |
| 91 | Cornelius Petroleum Inc | | Oil & Gas Operator | May 2025 |
| 92 | Cornelius Phillip J & Connie | Kellyville, OK 74039 | Oil & Gas Operator | Dec 2000 |
| 93 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Apr 2025 |
| 94 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | May 2025 |
| 95 | Corwin, B. V. | Enid, OK 73701 | Oil & Gas Operator | Apr 2017 |
| 96 | Coterra Energy Operating Co. | Midland, TX 79706 | Oil & Gas Operator | Jun 2025 |
| 97 | Covenant Oil Corp | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 98 | Covington Oil Company Inc | Nichols Hills, OK 73116 | Oil & Gas Operator | Jun 2025 |
| 99 | Cox Linda | Bristow, OK 74010-0808 | Oil & Gas Operator | Jan 2018 |
| 100 | Cox P D Inc | Bristow, OK 74010 | Oil & Gas Operator | May 1993 |