| 1 | Boland Investment Company | Turpin, OK 73950-0375 | Oil & Gas Operator | Jan 2013 |
| 2 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 3 | Cannon Energy Inc | Tulsa, OK 74101-3105 | Gas Operator | Dec 2004 |
| 4 | Coon Creek Gas Inc | | Oil & Gas Operator | Mar 2014 |
| 5 | Exploration Professionals Inc | Chelsea, OK 74016-0066 | Oil Operator | Dec 2023 |
| 6 | Fairway Resources Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Aug 2022 |
| 7 | Harper Joe Howard Dba J H Field Service | Nowata, OK 74048-9704 | Oil & Gas Operator | Sep 2025 |
| 8 | Hendrickson Lester | Delaware, OK 74027-9715 | Oil Operator | Mar 2015 |
| 9 | Highfill Bob W | Claremore, OK 74018-2595 | Oil Operator | Jun 2005 |
| 10 | Jackson L B Production Co | Tulsa, OK 74193-0001 | Oil & Gas Operator | Aug 2013 |
| 11 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Feb 2026 |
| 12 | Lakeland Pipeline Inc | Hominy, OK 74035-1006 | Oil & Gas Operator | Jun 2023 |
| 13 | Neok Production Company LLC | Nowata, OK 74048 | Oil & Gas Operator | Nov 2025 |
| 14 | Omega Mid-Continent, LLC | Tulsa, OK 74170 | Oil Operator | Nov 2025 |
| 15 | Oswego Arbuckle Enterprise Inc | S Coffeyville, OK 74072-9702 | Oil & Gas Operator | Mar 2015 |
| 16 | Postrock Midcontinent Production LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2025 |
| 17 | Premier Gas Company LLC | Durant, OK 74701 | Oil Operator | Sep 2025 |
| 18 | Quest Cherokee LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 19 | Redbud Oil & Gas | Nowata, OK 74048-0026 | Oil & Gas Operator | Dec 2000 |
| 20 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 21 | Sellmeyer Frank | San Rafael, CA 94901-1339 | Oil Operator | Dec 2014 |
| 22 | Seminole Oil Productions LLC | Surprise, AZ 85387-2015 | Oil Operator | Apr 2020 |
| 23 | Shideler Enterprises Inc | Drumright, OK 74030 | Oil & Gas Operator | Feb 2019 |
| 24 | Shidler Well Service | Vinita, OK 74301-5468 | Oil Operator | Dec 2000 |
| 25 | Smith Shirley C | Claremore, OK 74017-0060 | Oil & Gas Operator | Mar 2015 |
| 26 | STP Cherokee Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 27 | Tarwater Oil & Gas LLC | San Jose, CA 95128-4219 | Oil & Gas Operator | Dec 2023 |
| 28 | Tri-Unity Inc | Sand Springs, OK 74063-4401 | Oil & Gas Operator | Jun 2009 |
| 29 | Wce Corporation | Billings, MT 59102 | Oil Operator | Jul 1997 |
| 30 | Zeiders Bros. Oil & Gas Company, L.L.C. | Edmond, OK 73003 | Oil & Gas Operator | Nov 2025 |