| 201 | Texas Keystone Inc | Oakmont, PA 15139-2072 | Oil & Gas Operator | Nov 2017 |
| 202 | The Gas & Oil Company LLC | Apollo, PA 15613 | Oil & Gas Operator | Dec 2025 |
| 203 | Tom A Leeper | Brush Valley, PA 15720-0206 | Oil & Gas Operator | Dec 2024 |
| 204 | True Oil LLC | Casper, WY 82602 | Oil & Gas Operator | May 2026 |
| 205 | Turm Oil Inc | | Oil & Gas Operator | Dec 2025 |
| 206 | TW Phillips Gas Supply Corp | Butler, PA 16001-4904 | Oil & Gas Operator | Dec 2011 |
| 207 | Us Energy Exploration Corp | Rural Valley, PA 16249 | Oil & Gas Operator | Mar 2026 |
| 208 | Vec Energy LLC | Kittanning, PA 16201-5022 | Oil & Gas Operator | Apr 2026 |
| 209 | Vernard L Shumaker | Apollo, PA 15613-0249 | Gas Operator | Dec 2025 |
| 210 | Victory Energy Corp | Indiana, PA 15701-8944 | Oil & Gas Operator | Dec 2021 |
| 211 | Viking Resources Corp | Deerfield, OH 44411-0160 | Oil & Gas Operator | Dec 2007 |
| 212 | Viking Resources LLC | Uniontown, OH 44685 | Oil & Gas Operator | Dec 2017 |
| 213 | Wagner & Wagner | Indiana, PA 15701-1273 | Gas Operator | Dec 2012 |
| 214 | WBM Enterprises | Creekside, PA 15732-8228 | Oil & Gas Operator | Dec 2025 |
| 215 | WGM Gas Co Inc | | Oil & Gas Operator | Dec 2025 |
| 216 | WHC Oper LLC | | Gas Operator | Dec 2025 |
| 217 | White Oak Farms Inc | Dayton, PA 16222-4325 | Gas Operator | Dec 2025 |
| 218 | William McIntire Coal Oil & Gas | Shelocta, PA 15774-0171 | Oil & Gas Operator | May 2022 |
| 219 | Wilmoth Clark Exploration & Prod LLC | Glen Campbell, PA 15742-0159 | Gas Operator | Dec 2008 |
| 220 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Dec 2025 |
| 221 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Mar 2026 |
| 222 | Windfall Oil & Gas Inc | Falls Creek, PA 15840-2617 | Gas Operator | Dec 2024 |
| 223 | Wood Drilling LLC | Kittanning, PA 16201 | Gas Operator | Dec 2025 |
| 224 | Wood William C | Kittanning, PA 16201-4328 | Oil & Gas Operator | Dec 2018 |
| 225 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jul 2026 |