| 8201 | Osr Oil & Gas Corp | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 8202 | Ostrich Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 8203 | Oswego, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Jun 2004 |
| 8204 | Osyka Oil & Gas, Inc. | Metairie, LA 70004 | Oil & Gas Operator | Feb 2026 |
| 8205 | Osyka Permian, LLC | Houston, TX 77079 | Oil & Gas Operator | Feb 2026 |
| 8206 | Osyka Producing Company, Inc. | Houston, TX 77242 | Oil & Gas Operator | Feb 2026 |
| 8207 | Otb Operating, LLC | Stanton, TX 79782 | Oil & Gas Operator | Feb 2026 |
| 8208 | Otc Petroleum Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2015 |
| 8209 | Otex LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Feb 2026 |
| 8210 | Otex Resources LLC | Baytown, TX 77520 | Oil & Gas Operator | Feb 2026 |
| 8211 | Oto, Co. | Woodward, OK 73802 | Oil & Gas Operator | Jun 1998 |
| 8212 | Ouachita Exploration Inc | Chickasha, OK 73018 | Oil & Gas Operator | Dec 2025 |
| 8213 | Ouida Oil | Rowlett, TX 75030 | Oil & Gas Operator | Mar 2008 |
| 8214 | Outlaw Oil LLC | Caldwell, TX 77836 | Oil & Gas Operator | Feb 2026 |
| 8215 | Outline Oil Company LLC | Beeville, TX 78104 | Oil Operator | Feb 2026 |
| 8216 | Outline Oil Corp. | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 8217 | Ouut Investing LLC | Mineral Wells, TX 76068 | Oil Operator | Mar 2020 |
| 8218 | Ovation Energy II, LP | Houston, TX 77279 | Oil & Gas Operator | Jun 2011 |
| 8219 | Ovation Energy, LP | N Richlnd HLS, TX 76180 | Oil & Gas Operator | Sep 2004 |
| 8220 | Overflow Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 8221 | Overland Operating Company, LLC | Abilene, TX 79601 | Oil Operator | Feb 2026 |
| 8222 | Overly Operating Co. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2013 |
| 8223 | Overstreet, Jamie L | Hondo, TX 78861 | Oil & Gas Operator | Feb 2026 |
| 8224 | Overton Park Oil & Gas LP | Fort Worth, TX 76109 | Oil & Gas Operator | Feb 2026 |
| 8225 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 8226 | Owens Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2008 |
| 8227 | Owens Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 8228 | Owl Creek Operating Co., Inc. | Denver, CO 80206 | Oil & Gas Operator | Feb 2026 |
| 8229 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |
| 8230 | Owl Creek Production Co., LLC | Denver, CO 80265 | Oil & Gas Operator | Jan 2006 |
| 8231 | Owl Operating Ventures L.L.C. | Midland, TX 79708 | Oil & Gas Operator | Dec 2022 |
| 8232 | Owl Ops II LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 8233 | Owl Ops LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 8234 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2025 |
| 8235 | Ows Energy, Inc. | Montgomery, TX 77356 | Oil & Gas Operator | Feb 2026 |
| 8236 | Oxbow EP LLC | Mathis, TX 78368 | Oil Operator | Feb 2026 |
| 8237 | Oxbow Petroleum, LLC | Midland, TX 79703 | Oil & Gas Operator | May 2025 |
| 8238 | Oxenergy Incorporated | Flower Mound, TX 75022 | Oil & Gas Operator | Feb 2026 |
| 8239 | Oxford Exploration Company | Denver, CO 80237 | Oil & Gas Operator | Aug 1995 |
| 8240 | Oxford Oil Co. | Rockdale, TX 76567 | Oil & Gas Operator | Aug 2004 |
| 8241 | Oxson Co. | Uvalde, TX 78802 | Gas Operator | Feb 2026 |
| 8242 | Oxxn | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2023 |
| 8243 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 8244 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 8245 | Oxyrock Operating, LLC | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 8246 | Oz Gas Corporation | Tomball, TX 77377 | Gas Operator | Feb 2026 |
| 8247 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Feb 2026 |
| 8248 | Oztx Oil & Gas, L.L.C. | Ozona, TX 76943 | Oil & Gas Operator | Feb 2026 |
| 8249 | Ozzo Corporation, The | Bedford, TX 76021 | Oil Operator | Feb 2026 |
| 8250 | P & A Operating, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Feb 2026 |
| 8251 | P & C Oil Company | Leona, TX 75850 | Oil & Gas Operator | Nov 2025 |
| 8252 | P & F Operating, LLC | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 8253 | P & M Construction | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 8254 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 8255 | P & P Petroleum | Midland, TX 79706 | Oil & Gas Operator | Oct 2002 |
| 8256 | P & R Oil Company | Post, TX 79356 | Oil & Gas Operator | Feb 2026 |
| 8257 | P & W Well Service Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 8258 | P & WG Resources L.L.C. | Batson, TX 77519 | Oil & Gas Operator | Jan 2011 |
| 8259 | P&F Operations, LLC | Thrall, TX 76578 | Oil Operator | Feb 2026 |
| 8260 | P&P Industries, Inc. | Austin, TX 78737 | Oil & Gas Operator | Dec 2002 |
| 8261 | P,B&B Operating Inc. | Coleman, TX 76834 | Oil & Gas Operator | Feb 2026 |
| 8262 | P-2 Exploration Co. | Amarillo, TX 79124 | Oil & Gas Operator | Feb 2005 |
| 8263 | P-K Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
| 8264 | P-R-O Management, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 8265 | P-Tex Petroleum, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Nov 1999 |
| 8266 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 8267 | P. R. L. Oil Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2008 |
| 8268 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | Feb 2026 |
| 8269 | P.I.D. Drilling Inc | Clyde, TX 79510 | Oil & Gas Operator | Feb 2026 |
| 8270 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 8271 | P.O.S. Energy, Inc. | Buna, TX 77612 | Oil & Gas Operator | Feb 2026 |
| 8272 | P.S.N. Petroleum, Inc. | San Antonio, TX 78233 | Oil & Gas Operator | Feb 2026 |
| 8273 | P1 Energy, LLC | Judson, TX 75660 | Oil & Gas Operator | Feb 2026 |
| 8274 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 8275 | Pa Prospect LLC | Columbus, MT 59019 | Oil & Gas Operator | Jul 2020 |
| 8276 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Nov 2025 |
| 8277 | Pablo Energy, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2005 |
| 8278 | Pace And Ray Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Feb 2026 |
| 8279 | Pace Oil And Gas Company | Austin, TX 78715 | Oil & Gas Operator | Feb 2026 |
| 8280 | Pace Operating | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 8281 | Pace Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 8282 | Pace Production Co. | San Angelo, TX 76902 | Oil & Gas Operator | Feb 2026 |
| 8283 | Pace Royalty Trust Fund, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Nov 2001 |
| 8284 | Pace West Production LC | San Angelo, TX 76904 | Oil & Gas Operator | Sep 1995 |
| 8285 | Pacesetter Energy, Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | May 2008 |
| 8286 | Pacesetter Energy, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2020 |
| 8287 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 8288 | Pacific Enterprises Royalty Co | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 8289 | Pacific Exploration Oper Co, LLC | Houston, TX 77057 | Oil Operator | Feb 2026 |
| 8290 | Pacific Operators, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 1999 |
| 8291 | Pack-Man Energy Company | Ranger, TX 76470 | Oil & Gas Operator | Nov 2005 |
| 8292 | Packard Gas Company | Irving, TX 75063 | Oil & Gas Operator | Nov 2006 |
| 8293 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 8294 | Padon, Frank B. Oil Oper., Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1998 |
| 8295 | Page Energy | Eldorado, TX 76936 | Oil & Gas Operator | Mar 1997 |
| 8296 | Page Exploration | Midland, TX 79701 | Oil & Gas Operator | Apr 2007 |
| 8297 | Page Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 8298 | Page Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2010 |
| 8299 | Paint Rock Operating, LLC | San Angelo, TX 76904 | Oil & Gas Operator | Feb 2026 |
| 8300 | Pairadice Oil And Gas Company LLC | Caldwell, TX 77836 | Oil Operator | Feb 2026 |