| 1 | 1978 Investments LLC | Cushing, OK 74023 | Oil & Gas Operator | Apr 2025 |
| 2 | 3D Oil Company, LLC | Corpus Chrsti, TX 78406 | Oil & Gas Operator | Jul 2025 |
| 3 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 4 | 4D'S Operating Co LLC (The) | Ratliff City, OK 73481 | Oil & Gas Operator | Apr 2025 |
| 5 | Aaron Oil Company Inc | Shawnee, OK 74801-2321 | Oil Operator | Oct 2022 |
| 6 | ABC Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2023 |
| 7 | Abundance Energy LLC | Bartlesville, OK 74005-1087 | Oil & Gas Operator | Jul 2018 |
| 8 | Aei Corporation-Oklahoma | Oklahoma City, OK 73101-1945 | Oil & Gas Operator | Sep 2014 |
| 9 | Aei Production Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 2014 |
| 10 | Akin Jr Verna M & Emsley F | Maud, OK 74854 | Oil & Gas Operator | Apr 2002 |
| 11 | Aleco Production Company | | Oil & Gas Operator | Nov 1997 |
| 12 | Allied Petroleum Inc. | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Jun 2014 |
| 13 | Alpine Inc | Oklahoma City, OK 73134-2504 | Oil & Gas Operator | Feb 2024 |
| 14 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2025 |
| 15 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 16 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2013 |
| 17 | Amerex Corporation | Edmond, OK 73013-1044 | Oil & Gas Operator | Apr 2020 |
| 18 | American Capital Corporation | San Marcos, CA 92069 | Oil & Gas Operator | Sep 2014 |
| 19 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil & Gas Operator | Apr 2025 |
| 20 | American Petroleum & Mineral Co Inc | Seminole, OK 74868 | Oil & Gas Operator | Aug 2019 |
| 21 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 22 | An-Son Corporation | Oklahoma City, OK 73124 | Oil & Gas Operator | Jan 2006 |
| 23 | Anadarko Basin Oil& Gas Lease Inc | Sayre, OK 73662 | Oil & Gas Operator | Jan 1997 |
| 24 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 25 | Anderson Floyd Melton Revocable Trust | Yukon, OK 73099 | Oil & Gas Operator | Oct 2024 |
| 26 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 27 | Anson Charles Dba Anson Oil | Seminole, OK 74868 | Oil Operator | Apr 2025 |
| 28 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 29 | Anson J W | Seminole, OK 74818-1280 | Oil & Gas Operator | Oct 2020 |
| 30 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 31 | Apexco, Inc. | Sand Springs, OK 74063 | Oil & Gas Operator | Mar 2025 |
| 32 | Arapahoe Resources LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2025 |
| 33 | Archibald Oil & Gas Operating Inc | Ada, OK 74820 | Oil & Gas Operator | May 2025 |
| 34 | Aries Exploration Co Inc | Maud, OK 74854-0160 | Oil & Gas Operator | May 2013 |
| 35 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 36 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 37 | Armor SWD Inc | Oklahoma City, OK 73112 | Oil Operator | May 2020 |
| 38 | Arpel, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2014 |
| 39 | Arrington David Oil & Gas Inc | Midland, TX 79702-2071 | Oil & Gas Operator | Dec 2014 |
| 40 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Jul 2025 |
| 41 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 42 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Jul 2025 |
| 43 | Astro Energy Corporation | Edmond, OK 73083-3607 | Oil & Gas Operator | Sep 2014 |
| 44 | Atchley Resources, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 45 | Athabasca Energy Corporation | Simonton, TX 77476 | Oil & Gas Operator | Dec 2017 |
| 46 | Atlanko Oil & Gas Inc | Tulsa, OK 74135-7846 | Oil & Gas Operator | Apr 2025 |
| 47 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 48 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 49 | Aw Hembree Co | Shawnee, OK 74802-1725 | Oil & Gas Operator | Apr 2025 |
| 50 | B & B Operating Company | Odessa, TX 79760 | Oil & Gas Operator | Jul 2025 |
| 51 | B & B Tool Company Inc | Lindsay, OK 73052 | Oil & Gas Operator | Apr 2025 |
| 52 | B & S Oil Company | Kermit, TX 79745 | Oil & Gas Operator | May 2025 |
| 53 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Jul 2025 |
| 54 | B B R Oil Corporation | Norman, OK 73069 | Oil & Gas Operator | Apr 2025 |
| 55 | Bacon Fred Estate Of | Glenpool, OK 74033-9802 | Oil & Gas Operator | Apr 2020 |
| 56 | Bale Corporation (The) | Edmond, OK 73083-6863 | Oil & Gas Operator | Dec 2019 |
| 57 | Barbour Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jul 2025 |
| 58 | Barta Enterprises | Oklahoma City, OK 73162-1728 | Oil & Gas Operator | Apr 2025 |
| 59 | Basis Resources Group LLC | Oklahoma, OK 73116-1516 | Oil & Gas Operator | Apr 2025 |
| 60 | Baxter And Associates Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2025 |
| 61 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Apr 2025 |
| 62 | Becsul Energy | Oklahoma City, OK 73127 | Oil Operator | Jan 1992 |
| 63 | Becsul Energy Inc | Oklahoma City, OK 73127-4249 | Oil & Gas Operator | Apr 2025 |
| 64 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 65 | Bent Tree Energy Resource Inc | Shawnee, OK 74802 | Oil & Gas Operator | Sep 2014 |
| 66 | Bentley & Laing | Wichita Falls, TX 76302 | Oil & Gas Operator | Feb 2002 |
| 67 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 68 | Berry, Thomas N. & Co. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2012 |
| 69 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 70 | Bill Weems Oil LLC | Seminole, OK 74868 | Oil & Gas Operator | Apr 2025 |
| 71 | Billy Jack Sharber Operating LLC | Seminole, OK 74868 | Oil & Gas Operator | Apr 2025 |
| 72 | Bird Oil & Gas Inc | Yukon, OK 73099-2827 | Oil & Gas Operator | Jan 2023 |
| 73 | Birks Robert L Dba Birks Production | Asher, OK 74826-9633 | Oil & Gas Operator | Apr 2025 |
| 74 | Black Lava Operating LLC | | Oil & Gas Operator | Apr 2025 |
| 75 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Jul 2025 |
| 76 | Bluebonnet Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Apr 2025 |
| 77 | Bluebonnet Oil LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | May 2025 |
| 78 | Boone Operating Inc | Oklahoma City, OK 73118-6014 | Oil & Gas Operator | Apr 2025 |
| 79 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 80 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 81 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Jul 2025 |
| 82 | Brand Oil & Gas Inc | Oklahoma City, OK 73165-8911 | Oil & Gas Operator | May 2013 |
| 83 | Branson Production Company | Oklahoma City, OK 73123-1323 | Oil & Gas Operator | Aug 2002 |
| 84 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 85 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | May 2025 |
| 86 | Bridon Energy LLC | Yukon, OK 73099 | Oil & Gas Operator | Apr 2025 |
| 87 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 88 | Britt Oil Company LLC | Shawnee, OK 74801-9613 | Oil & Gas Operator | May 2025 |
| 89 | Bronco Petroleum Company | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2014 |
| 90 | Brown Gary E | Tecumseh, OK 74873-0355 | Oil & Gas Operator | Aug 2015 |
| 91 | Brown L C Company | Ada, OK 74820-7916 | Oil & Gas Operator | Nov 2021 |
| 92 | Buccaneer Petroleum Inc | Tonkawa, OK 74653-2513 | Oil & Gas Operator | Jan 2013 |
| 93 | Bud Oil, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2025 |
| 94 | Bulldog Production Inc | Seminole, OK 74868 | Oil Operator | Nov 2024 |
| 95 | Buxton Fred M | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Feb 2007 |
| 96 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | May 2025 |
| 97 | C & W Oil Inc | | Oil & Gas Operator | Aug 2016 |
| 98 | C E L Inc | Bartlesville, OK 74006 | Oil & Gas Operator | Jan 2020 |
| 99 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 100 | Cactus Oil & Gas LLC | Seminole, OK 74868-2430 | Oil & Gas Operator | Mar 2018 |