| 1 | 306 Oil Investment Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2005 |
| 2 | A H & L Operating Company Inc | Norman, OK 73070-4084 | Oil & Gas Operator | Apr 2015 |
| 3 | Abarr Trust (The) | Oklahoma City, OK 73179 | Oil & Gas Operator | May 2025 |
| 4 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Jul 2025 |
| 5 | Aei Production Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 2014 |
| 6 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 7 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Apr 2025 |
| 8 | Aladdin Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2021 |
| 9 | All Exploration LLC | Oklahoma City, OK 73120-7829 | Oil & Gas Operator | Apr 2025 |
| 10 | Altex Oil Corp | Breckenridge, CO 80424-1057 | Oil & Gas Operator | Dec 1999 |
| 11 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2025 |
| 12 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Apr 2025 |
| 13 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jul 2020 |
| 14 | An-Son Corporation | Oklahoma City, OK 73124 | Oil & Gas Operator | Jan 2006 |
| 15 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 16 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 17 | Angel Exploration Company | Oklahoma City, OK 73102-8868 | Oil & Gas Operator | Jan 2019 |
| 18 | Angel Exploration LLC | Oklahoma City, OK 73116-3603 | Oil & Gas Operator | May 2025 |
| 19 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 20 | Antioch Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | May 2025 |
| 21 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 22 | Apc Operating Partnership LP | Tulsa, OK 74136-4224 | Oil & Gas Operator | Jun 2015 |
| 23 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | May 2025 |
| 24 | Aquila Energy Resources Corp. | Houston, TX 77042 | Oil & Gas Operator | Nov 2013 |
| 25 | Arbor Petroleum Corporation | Oklahoma City, OK 73102-4003 | Oil & Gas Operator | Mar 2011 |
| 26 | Arbuckle Enterprises, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Apr 2025 |
| 27 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 28 | Arrington Properties Inc | Edmond, OK 73034-3724 | Oil & Gas Operator | May 1996 |
| 29 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 30 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 31 | Atchley Resources, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 32 | Athena Energy, Inc. | Gallatin, TN 37066 | Oil & Gas Operator | Jul 2025 |
| 33 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 34 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2025 |
| 35 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 36 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Jul 2025 |
| 37 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 38 | B R Polk Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2025 |
| 39 | Bailey Oil Co., Inc. | Neodesha, KS 66757 | Oil & Gas Operator | Jan 2025 |
| 40 | Barby Energy Corporation | Woodward, OK 73802-1660 | Oil & Gas Operator | Apr 2025 |
| 41 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Jul 2025 |
| 42 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 43 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 44 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 45 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 46 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 47 | Belisle Pete H | Tulsa, OK 74133 | Oil & Gas Operator | Apr 2015 |
| 48 | Bell & Kinley Company LLC | Piedmont, OK 73078-8918 | Oil & Gas Operator | Jul 2021 |
| 49 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 50 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 51 | Berry, Thomas N. & Co. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2012 |
| 52 | Beta Oil Company Inc | Oklahoma City, OK 73157-2958 | Oil & Gas Operator | Dec 2022 |
| 53 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 54 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 55 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 56 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 57 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jul 2025 |
| 58 | Bluebonnet Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Apr 2025 |
| 59 | Bluebonnet Oil LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | May 2025 |
| 60 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 61 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | May 2025 |
| 62 | Boone Operating Inc | Oklahoma City, OK 73118-6014 | Oil & Gas Operator | Apr 2025 |
| 63 | Boosted Production LLC | Mooreland, OK 73852-0076 | Oil & Gas Operator | Apr 2025 |
| 64 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 65 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 66 | BP Explorationinc/Ofb See #17756 | | Oil & Gas Operator | Apr 2015 |
| 67 | Bracksieck Lloyd H | Boulder, CO 80303 | Oil & Gas Operator | Feb 2019 |
| 68 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 69 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 70 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 71 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 72 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | May 2025 |
| 73 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 74 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 75 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 76 | Brock Resources, Inc. | New Orleans, LA 70112 | Oil & Gas Operator | Nov 1998 |
| 77 | Bromar Oil Company | Fairview, OK 73737-0006 | Oil & Gas Operator | Apr 2014 |
| 78 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 79 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | Jul 2025 |
| 80 | Brown Jeff J Dba Brown Service Co | Enid, OK 73701 | Oil & Gas Operator | May 2025 |
| 81 | Bso Inc | Cleveland, OK 74020 | Oil & Gas Operator | May 2025 |
| 82 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 83 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 84 | Bulldog Disposal Inc | Laverne, OK 73848 | Oil Operator | Apr 2014 |
| 85 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 86 | C&D Supply | Cherokee, OK 73728-5817 | Oil & Gas Operator | Apr 2025 |
| 87 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 88 | Cabot Petroleum Corporation | Englewood, CO 80111-2529 | Oil & Gas Operator | Dec 2004 |
| 89 | Calebs Resources LLC | Edmond, OK 73012 | Oil & Gas Operator | Apr 2025 |
| 90 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 91 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | May 2025 |
| 92 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2025 |
| 93 | Carlin Oil And Gas Company | Tulsa, OK 74101-1019 | Oil & Gas Operator | May 1992 |
| 94 | Carney Mark C & Karen M | Dallas, TX 75206-4010 | Oil & Gas Operator | Oct 1994 |
| 95 | Carr Exploration Corp. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 96 | Cei Petroleum Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Jul 2016 |
| 97 | Centurion Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 98 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | May 2025 |
| 99 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | May 2025 |
| 100 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2025 |