| 1 | J J B Oil & Gas Inc | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 1996 |
| 2 | J L Hajek Enterprises LLC | Ames, OK 73718 | Oil & Gas Operator | May 2025 |
| 3 | Jack Oil Company L.L.C. | Duncan, OK 73533 | Oil & Gas Operator | Jun 2025 |
| 4 | Jackson Petroleum Consult Inc | Dallas, TX 75287 | Oil & Gas Operator | Aug 1994 |
| 5 | January Investments LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2025 |
| 6 | Jebito Farm LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Jun 2025 |
| 7 | Jec Operating LLC | Oklahoma City, OK 73114-2717 | Oil & Gas Operator | Jun 2025 |
| 8 | Jeda Kini Production Co LLC | Hays, KS 67601-3659 | Oil & Gas Operator | Mar 2008 |
| 9 | Jico Exploration Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 2004 |
| 10 | JKB Resources LLC | Stigler, OK 74462 | Oil & Gas Operator | Jun 2025 |
| 11 | Jma Energy Company, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 12 | Johnson Exploration Company | Oklahoma City, OK 73102-7008 | Oil & Gas Operator | Jun 2015 |
| 13 | Jones Energy LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2025 |
| 14 | Jones Oil Company LLC (The) | Duncan, OK 73533-4995 | Oil & Gas Operator | Mar 2025 |
| 15 | Jordan Development Company LLC | Traverse City, MI 49686 | Oil & Gas Operator | Jul 2025 |