| 1 | 21ST Century Investment Co | Tulsa, OK 74114-4220 | Oil & Gas Operator | Oct 2025 |
| 2 | 3D Oil Company, LLC | Corpus Chrsti, TX 78406 | Oil & Gas Operator | Dec 2025 |
| 3 | 56 Oil & Gas LTD | Norman, OK 73070-4065 | Oil Operator | May 2018 |
| 4 | 7H Operating LLC | Konawa, OK 74894-6005 | Oil Operator | Oct 2025 |
| 5 | A H & L Operating Company Inc | Norman, OK 73070-4084 | Oil & Gas Operator | Apr 2015 |
| 6 | Aaa Oil & Gas Inc | Pauls Valley, OK 73075-0863 | Oil Operator | Mar 2000 |
| 7 | Aaron Oil Company Inc | Shawnee, OK 74801-2321 | Oil Operator | Oct 2022 |
| 8 | ABC Oil Company Inc | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2023 |
| 9 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Dec 2025 |
| 10 | Abundance Energy LLC | Bartlesville, OK 74005-1087 | Oil & Gas Operator | Jul 2018 |
| 11 | Acelco Inc | Norman, OK 73070 | Oil & Gas Operator | Oct 1996 |
| 12 | Ada Energy Exploration And Production LLC | Ada, OK 74820-0867 | Oil Operator | Oct 2025 |
| 13 | Adventure Properties Inc | Ada, OK 74820 | Oil & Gas Operator | Sep 2025 |
| 14 | Aei Corporation-Oklahoma | Oklahoma City, OK 73101-1945 | Oil & Gas Operator | Sep 2014 |
| 15 | Aei Production Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 2014 |
| 16 | Agate Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2015 |
| 17 | Aker Oil & Gas Company | Tulsa, OK 74105-2216 | Oil & Gas Operator | Aug 2013 |
| 18 | Alamo Resources Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 19 | Alda Oil & Gas Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Jan 2004 |
| 20 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 21 | Allen Oil & Gas LLC | Ardmore, OK 73401 | Oil Operator | Aug 2022 |
| 22 | Alpine Inc | Oklahoma City, OK 73134-2504 | Oil & Gas Operator | Feb 2024 |
| 23 | Altex Resources, Inc. | Carney, OK 74832 | Oil & Gas Operator | Mar 2015 |
| 24 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Dec 2025 |
| 25 | American Natural Resources LLC | Tulsa, OK 74145-1117 | Oil & Gas Operator | May 2020 |
| 26 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil & Gas Operator | Oct 2025 |
| 27 | American Petroleum & Mineral Co Inc | Seminole, OK 74868 | Oil & Gas Operator | Aug 2019 |
| 28 | American Trading & Prod Corp | Houston, TX 77040-6471 | Oil & Gas Operator | Nov 2014 |
| 29 | Americana Energy Inc | Byng, OK 74820 | Oil & Gas Operator | Oct 2025 |
| 30 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 31 | Ameritech Oil & Gas Corporation | Dallas, TX 75248 | Oil & Gas Operator | May 1996 |
| 32 | Amerroyal Energy LLC | Shawnee, OK 74804-4163 | Oil & Gas Operator | Dec 2022 |
| 33 | Andress Bill O | Tulsa, OK 74135-3553 | Oil & Gas Operator | Sep 2003 |
| 34 | Anson Charles Dba Anson Oil | Seminole, OK 74868 | Oil Operator | Oct 2025 |
| 35 | Anson J W | Seminole, OK 74818-1280 | Oil & Gas Operator | Oct 2020 |
| 36 | Anvil Oil Co., Inc. | Bartlesville, OK 74003-5030 | Oil & Gas Operator | Dec 2008 |
| 37 | Archibald Oil & Gas Operating Inc | Ada, OK 74820 | Oil & Gas Operator | Sep 2025 |
| 38 | Aries Exploration Co Inc | Maud, OK 74854-0160 | Oil & Gas Operator | May 2013 |
| 39 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 40 | Arnold Oil Properties, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2019 |
| 41 | Arnold Oil Properties, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 42 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | Nov 2025 |
| 43 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 2025 |
| 44 | Arrow Operating Company | Dallas, TX 75231 | Oil & Gas Operator | Nov 2025 |
| 45 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Nov 2025 |
| 46 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Dec 2025 |
| 47 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 48 | Atlas Oil Inc | Oklahoma City, OK 73154-0467 | Oil & Gas Operator | Aug 2008 |
| 49 | Autumn Exploration LTD | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2015 |
| 50 | Avatar Energy LLC | Dallas, TX 75220-2230 | Oil & Gas Operator | Jul 2016 |
| 51 | Ayers Energy, Inc. | Oklahoma City, OK 73177 | Oil & Gas Operator | Dec 1995 |
| 52 | B & B Tool Company Inc | Lindsay, OK 73052 | Oil & Gas Operator | Oct 2025 |
| 53 | B & C Drilling Company Inc | Holdenville, OK 74848-0961 | Oil & Gas Operator | Mar 2000 |
| 54 | B & O Drilling Inc | Ada, OK 74820-8065 | Oil & Gas Operator | Sep 2014 |
| 55 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 56 | B B R Oil Corporation | Norman, OK 73069 | Oil & Gas Operator | Oct 2025 |
| 57 | Bacon Fred Estate Of | Glenpool, OK 74033-9802 | Oil & Gas Operator | Apr 2020 |
| 58 | Bargo Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 59 | Barrett Oil Co. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2023 |
| 60 | Baxter And Associates Inc | Ada, OK 74820 | Oil & Gas Operator | Oct 2025 |
| 61 | Bear Petroleum Inc | Haysville, KS 67060-0438 | Oil & Gas Operator | Mar 2015 |
| 62 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Sep 2025 |
| 63 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 64 | Becsul Energy Inc | Oklahoma City, OK 73127-4249 | Oil & Gas Operator | Oct 2025 |
| 65 | Belcher James A | Piedmont, OK 73078-7821 | Oil & Gas Operator | Jun 2018 |
| 66 | Bentley & Laing | Wichita Falls, TX 76302 | Oil & Gas Operator | Feb 2002 |
| 67 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 68 | Berry, Thomas N. & Co. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2012 |
| 69 | Bertschinger Oil Company | Oklahoma City, OK 73116-6534 | Oil & Gas Operator | Nov 2015 |
| 70 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 71 | Bill Weems Oil LLC | Seminole, OK 74868 | Oil & Gas Operator | Sep 2025 |
| 72 | Billy Jack Sharber Operating LLC | Seminole, OK 74868 | Oil & Gas Operator | Nov 2025 |
| 73 | Birks Robert L Dba Birks Production | Asher, OK 74826-9633 | Oil & Gas Operator | Oct 2025 |
| 74 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 75 | Black Jewel Resources LTD Co | Berryville, AR 72616-0538 | Oil & Gas Operator | Dec 2014 |
| 76 | Black Lava Operating LLC | | Oil & Gas Operator | Oct 2025 |
| 77 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 78 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 79 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 80 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Dec 2025 |
| 81 | Bo-MC Operating Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Mar 2018 |
| 82 | Bo-MC Resources Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Apr 2005 |
| 83 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | Sep 2025 |
| 84 | Bolen Russell Dba Teresa Energy | Konawa, OK 74849 | Oil Operator | Oct 2025 |
| 85 | Boone Operating LLC | Oklahoma City, OK 73118-6014 | Oil & Gas Operator | Oct 2025 |
| 86 | Boswell Energy Corporation | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 87 | Box Energy Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2003 |
| 88 | Boxie Oil Co | Asher, OK 74826-0243 | Oil & Gas Operator | Feb 2008 |
| 89 | Boyce Producing Corporation | Edmond, OK 73012-4323 | Oil & Gas Operator | Mar 2015 |
| 90 | Brady Oil Company Inc | Sasakwa, OK 74867-9723 | Oil Operator | Jun 2017 |
| 91 | Brady Production | Saskawa, OK 74867-9723 | Oil & Gas Operator | Aug 2019 |
| 92 | Brady Warnie E | Sasakwa, OK 74867 | Oil Operator | Mar 2004 |
| 93 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 94 | Branson Production Company | Oklahoma City, OK 73123-1323 | Oil & Gas Operator | Aug 2002 |
| 95 | Breitburn Operating LP | Keithville, LA 71047 | Oil & Gas Operator | Dec 2025 |
| 96 | Brewer Carroll L | Edmond, OK 73003-0010 | Oil & Gas Operator | Oct 2025 |
| 97 | Brewer J E | Seminole, OK 74818-0863 | Oil & Gas Operator | Mar 2014 |
| 98 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 99 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 100 | Britt Oil Company LLC | Shawnee, OK 74801-9613 | Oil & Gas Operator | Oct 2025 |