| 1 | 4D'S Operating Co LLC (The) | Ratliff City, OK 73481 | Oil & Gas Operator | Apr 2025 |
| 2 | 56 Oil & Gas LTD | Norman, OK 73070-4065 | Oil Operator | May 2018 |
| 3 | 7C Land & Minerals Co | Ada, OK 74820 | Oil & Gas Operator | May 2025 |
| 4 | A H & L Operating Company Inc | Norman, OK 73070-4084 | Oil & Gas Operator | Apr 2015 |
| 5 | Abercrombie, A. L., Inc | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 6 | Ackley Earl H & Glenora Trust | Cushing, OK 74023-5230 | Oil & Gas Operator | Mar 2015 |
| 7 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 8 | Alford Paul | Ada, OK 74820 | Oil Operator | Jan 2020 |
| 9 | Americana Energy Inc | Byng, OK 74820 | Oil & Gas Operator | Apr 2025 |
| 10 | Americana Petroleum Corp | Waco, TX 76710 | Oil Operator | Aug 1992 |
| 11 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 12 | Archibald Oil & Gas Operating Inc | Ada, OK 74820 | Oil & Gas Operator | May 2025 |
| 13 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | Apr 2025 |
| 14 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Jul 2025 |
| 15 | Arrow Operating Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2024 |
| 16 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Jul 2025 |
| 17 | Atlanko Oil & Gas Inc | Tulsa, OK 74135-7846 | Oil & Gas Operator | Apr 2025 |
| 18 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 19 | B & B Operating Company | Odessa, TX 79760 | Oil & Gas Operator | Jul 2025 |
| 20 | B & B Tool Company Inc | Lindsay, OK 73052 | Oil & Gas Operator | Apr 2025 |
| 21 | B & C Drilling Company Inc | Holdenville, OK 74848-0961 | Oil & Gas Operator | Mar 2000 |
| 22 | B & F Enterprises | Ada, OK 74820 | Oil & Gas Operator | Feb 2002 |
| 23 | B & S Oil Company | Kermit, TX 79745 | Oil & Gas Operator | May 2025 |
| 24 | B B R Oil Corporation | Norman, OK 73069 | Oil & Gas Operator | Apr 2025 |
| 25 | Balco Energy Inc | Duncan, OK 73533 | Oil & Gas Operator | May 2025 |
| 26 | Bale Corporation (The) | Edmond, OK 73083-6863 | Oil & Gas Operator | Dec 2019 |
| 27 | Barrett Oil Co. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2023 |
| 28 | Baruch-Foster Corporation | Oklahoma City, OK 73126-6770 | Oil & Gas Operator | Feb 2001 |
| 29 | Baulch Enterprises | Ada, OK 74820-8623 | Oil Operator | Dec 1999 |
| 30 | Baxter And Associates Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2025 |
| 31 | Bee Cee Inc | Denton, TX 76206-0689 | Oil & Gas Operator | May 2013 |
| 32 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 33 | Benfer Theodore M | Tupelo, OK 74572-5096 | Oil Operator | Apr 2025 |
| 34 | Bergen Floyd | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 35 | Bertschinger Oil Company | Oklahoma City, OK 73116-6534 | Oil & Gas Operator | Nov 2015 |
| 36 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 37 | Bickham G C Inc | Ada, OK 74820-8304 | Oil Operator | Jun 2017 |
| 38 | Billy Jack Sharber Operating LLC | Seminole, OK 74868 | Oil & Gas Operator | Apr 2025 |
| 39 | Boje Oil Company LLC | | Oil & Gas Operator | Apr 2025 |
| 40 | Bolen Russell Dba Teresa Energy | Konawa, OK 74849 | Oil Operator | Apr 2025 |
| 41 | Bonita Hydrocarbons Company | Dallas, TX 75229 | Oil & Gas Operator | Jun 2008 |
| 42 | Boyle Philip Inc | Norman, OK 73072-6913 | Oil & Gas Operator | Jun 1999 |
| 43 | Boyle Phillip Inc | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 44 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 45 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 46 | Brown L C Company | Ada, OK 74820-7916 | Oil & Gas Operator | Nov 2021 |
| 47 | Bud Oil, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2025 |
| 48 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 49 | Byng Operating LLC | Ada, OK 74820-0677 | Oil & Gas Operator | Apr 2025 |
| 50 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 51 | C & L Drilling Company | Ada, OK 74821-1252 | Oil & Gas Operator | Jan 2014 |
| 52 | C & L Enterprises Inc | Lindsay, OK 73052 | Oil & Gas Operator | Apr 2025 |
| 53 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | Jul 2025 |
| 54 | C.J. Oil Company | Iowa Park, TX 76367 | Oil Operator | Dec 2024 |
| 55 | Cactus Oil & Gas LLC | Seminole, OK 74868-2430 | Oil & Gas Operator | Mar 2018 |
| 56 | Cajeza Energy | Drumright, OK 74030 | Oil & Gas Operator | May 2013 |
| 57 | Callie Oil Company LLC | Perry, OK 73077 | Oil & Gas Operator | May 2025 |
| 58 | Calvert Exploration Co | | Oil & Gas Operator | Apr 1993 |
| 59 | Cantrell Energy Corporation | Ada, OK 74820-0835 | Oil & Gas Operator | Apr 2025 |
| 60 | Cantrell Robert R | Ada, OK 74820 | Oil & Gas Operator | Apr 2025 |
| 61 | Canyon Creek Energy Arkoma LLC | Tulsa, OK 74120-3017 | Oil & Gas Operator | Apr 2025 |
| 62 | Cap Oil Company | Ada, OK 74820 | Oil Operator | Apr 2025 |
| 63 | Carmichael Oil & Gas Company | Vallejo, CA 94591-5653 | Oil & Gas Operator | Apr 2014 |
| 64 | Carver Harry | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2000 |
| 65 | Cedar Oil Company | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 66 | Center Oil Company | Ada, OK 74821-0584 | Oil Operator | May 2003 |
| 67 | Center Production Company LLC | Ada, OK 74820 | Oil Operator | Apr 2025 |
| 68 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2025 |
| 69 | Cep Mid-Continent LLC | Skiatook, OK 74070 | Oil & Gas Operator | Apr 2025 |
| 70 | Chapel Operating LLC | Lone Grove, OK 73443 | Oil Operator | Apr 2025 |
| 71 | Cherokee Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 72 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | May 2025 |
| 73 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 74 | Chiles Jack Well Service | Atwood, OK 74827-0373 | Oil Operator | Apr 2014 |
| 75 | Chiles Robert Morris | Allen, OK 74825 | Oil Operator | Apr 2025 |
| 76 | Chisum G H | Duncan, OK 73533 | Oil & Gas Operator | Dec 2010 |
| 77 | Christian Bros Op Co Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2014 |
| 78 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Jul 2025 |
| 79 | Clarita Operating LLC | Ada, OK 74821 | Oil Operator | Jun 2022 |
| 80 | Clark Krista | Ada, OK 74820-8595 | Oil Operator | Sep 2001 |
| 81 | Clean Oil LLC | Ada, OK 74820 | Oil & Gas Operator | Mar 2025 |
| 82 | Clifford Resources Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2015 |
| 83 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 84 | Coho Oil & Gas Inc | Coppell, TX 75019-8288 | Oil & Gas Operator | Mar 2015 |
| 85 | Colpitt C H Drilling Co LLC | Collinsville, OK 74021-7107 | Oil Operator | Apr 2025 |
| 86 | Colpitt Chas H Drilling Co | Collinsville, OK 74021-7105 | Oil & Gas Operator | Mar 2012 |
| 87 | Columbus Oil Company | Seminole, OK 74868 | Oil & Gas Operator | May 2025 |
| 88 | Complete Energy Services LLC | Gainesville, TX 76240 | Oil Operator | Aug 2022 |
| 89 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 90 | Conner Production Co LLC | Seminole, OK 74868 | Oil & Gas Operator | Apr 2025 |
| 91 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 92 | Consolidated Production Inc. | Seminole, OK 74868 | Oil & Gas Operator | Apr 2025 |
| 93 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Jul 2025 |
| 94 | Cook Oil Company | Wewoka, OK 74884 | Oil & Gas Operator | Sep 2015 |
| 95 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Apr 2025 |
| 96 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 97 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 98 | D & E Oil Co | Perryton, TX 79070 | Oil & Gas Operator | Jul 2025 |
| 99 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Jul 2025 |
| 100 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Jul 2025 |