| 1 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Oct 2025 |
| 2 | Jab Operating, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2008 |
| 3 | Javelin Energy Partners Management, LLC | Irving, TX 75038 | Oil & Gas Operator | Oct 2025 |
| 4 | Jay-Dee Operating Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Aug 2000 |
| 5 | JB Oil & Gas Well Service | Dilley, TX 78017 | Oil & Gas Operator | Oct 2025 |
| 6 | Jena Operating Company, Inc. | Dallas, TX 75367 | Oil & Gas Operator | May 2007 |
| 7 | Jenco Petroleum Corporation | The Woodlands, TX 77380 | Oil Operator | Oct 2025 |
| 8 | Jenex Operating Company Of Texas | Denver, CO 80209 | Oil & Gas Operator | Aug 2003 |
| 9 | Jenex Petroleum Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 10 | Jenkins Oil Corporation | Hankamer, TX 77560 | Oil & Gas Operator | Mar 2008 |
| 11 | Jil Oil Corp. | San Antonio, TX 78279 | Oil & Gas Operator | Oct 2025 |
| 12 | Jin Petroleum LLC | New Braunfels, TX 78130 | Oil Operator | Oct 2025 |
| 13 | JM Calk Operating, LLC | Lytle, TX 78052 | Oil Operator | Oct 2025 |
| 14 | Johnson Sanford Op Co., LTD | Leander, TX 78641 | Oil & Gas Operator | Oct 2025 |