| 29401 | Trans Atlantic Ener Corp | Caldwell, OH 43724 | Oil & Gas Operator | Dec 1993 |
| 29402 | Trans Atlantic Resource Corp | Tulsa, OK 74136-5709 | Oil & Gas Operator | Nov 1998 |
| 29403 | Trans Energy, Inc. | St. Marys, WV 26170 | Oil & Gas Operator | Dec 2017 |
| 29404 | Trans Ocean Oil, Inc. | | Oil & Gas Operator | Sep 1980 |
| 29405 | Trans Pacific Oi | | Oil & Gas Operator | May 1995 |
| 29406 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | May 2026 |
| 29407 | Trans Resource D | | Oil Operator | May 1991 |
| 29408 | Trans Terra Corp., International | Amarillo, TX 79159 | Oil & Gas Operator | Feb 2009 |
| 29409 | Trans Texas Minerals Company | Austin, TX 78714 | Oil & Gas Operator | Aug 1999 |
| 29410 | Trans-Gulf Petroleum Corp | | Oil & Gas Operator | Sep 1999 |
| 29411 | Trans-Pacific Oil & Gas Inc. | | Oil & Gas Operator | Mar 1982 |
| 29412 | Trans-Pecos Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jul 2026 |
| 29413 | Trans-Sabine Pipeline Corp | | Oil Operator | Mar 2009 |
| 29414 | Trans-Tex Operating LLC | Dallas, TX 75367 | Oil & Gas Operator | Jul 2026 |
| 29415 | Trans-Texas Energy Group LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2015 |
| 29416 | Trans-Western Exploration Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 1993 |
| 29417 | Trans-Western Operating Company | Golden, CO 80402 | Oil Operator | Nov 2025 |
| 29418 | Transamer Petro Corp | Pittsburgh, PA 15222-3510 | Gas Operator | Dec 1985 |
| 29419 | Transamerica Energy Corp. | Atlanta, GA 30356 | Oil & Gas Operator | Jul 2026 |
| 29420 | Transamerica Oil | | Oil & Gas Operator | Sep 1992 |
| 29421 | Transamerica Oil Corporation | Hutchinson, KS 67504 | Gas Operator | Mar 2025 |
| 29422 | Transamerican Energy/Toce Oil | | Oil & Gas Operator | Dec 1994 |
| 29423 | Transamerican Natural Gas Corp. | Houston, TX 77032 | Oil & Gas Operator | Aug 2000 |
| 29424 | Transamerican-Swepi-Toce Oil | | Oil & Gas Operator | Apr 1990 |
| 29425 | Transatlantic Expl LTD Dba Ravenna Oil | Beattyville, KY 41311 | Oil Operator | Dec 2023 |
| 29426 | Transatlantic Petr (USA) Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jul 2026 |
| 29427 | Transco Exploration Company | | Oil & Gas Operator | Jul 1989 |
| 29428 | Transco Oil & Gas Inc. | | Gas Operator | Dec 1992 |
| 29429 | Transcoastal Operating LLC | Dallas, TX 75252-5646 | Oil & Gas Operator | Mar 2015 |
| 29430 | Transcontinental Company | Haltom City, TX 76148-4122 | Oil & Gas Operator | May 2026 |
| 29431 | Transcontinental Gas P/L Corp. | | Oil & Gas Operator | Dec 2009 |
| 29432 | Transcontinental Gas Pipeline Co LLC | | Oil Operator | Jan 2025 |
| 29433 | Transcontinental Minerals Corp. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2008 |
| 29434 | Transcontinental Oil & Gas Inc | Aurora, OH 44202 | Oil & Gas Operator | Dec 2025 |
| 29435 | Transcontinental Oil Corp. | | Oil & Gas Operator | Sep 1985 |
| 29436 | Transcontinental Shale L.L.C. | Austin, TX 78717 | Oil & Gas Operator | Feb 2016 |
| 29437 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 29438 | Transglobe Oil & Gas Corporation | Littleton, CO 801222710 | Oil & Gas Operator | Dec 1999 |
| 29439 | Transhorizon Energy Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2023 |
| 29440 | Transit Energy Inc | North Lawrence, OH 44666 | Oil & Gas Operator | Dec 2025 |
| 29441 | Transoil, Inc. | Oklahoma City, OK 73129 | Oil & Gas Operator | Jul 2026 |
| 29442 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 29443 | Transpac Petroleum Inc. | | Oil & Gas Operator | Dec 1995 |
| 29444 | Transpacific Energy, LLC | Katy, TX 77450 | Oil & Gas Operator | Jul 2026 |
| 29445 | Transpetco I | Shreveport, LA 71101 | Oil & Gas Operator | May 2009 |
| 29446 | Transpetco Transport Company | Shreveport, LA 71101-5370 | Oil Operator | Jun 2008 |
| 29447 | Transtexas Gas Corporation | Houston, TX 77265 | Oil & Gas Operator | Aug 2005 |
| 29448 | Transworld Expl. & Prod., Inc. | | Oil & Gas Operator | Mar 2004 |
| 29449 | Transworld Systems Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 29450 | Trap Rock Oil Company | Cambridge, MA 02138 | Oil & Gas Operator | Nov 2005 |
| 29451 | Trap Rock Oil, LTD. | Houston, TX 77005 | Oil & Gas Operator | Jul 2026 |
| 29452 | Trapp Oil Oper - | | Oil Operator | Aug 1989 |
| 29453 | Traton Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Mar 2019 |
| 29454 | Travco Well Servicing LLC | Okmulgee, OK 74447 | Oil Operator | Apr 2026 |
| 29455 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Jul 2026 |
| 29456 | Travell Energy, Inc | | Oil Operator | Dec 2023 |
| 29457 | Traver Oil & Gas Corporation | | Oil & Gas Operator | Sep 2000 |
| 29458 | Traver Oil Company | | Oil & Gas Operator | Sep 2000 |
| 29459 | Traver-Patterson Petroleum Inc | | Oil & Gas Operator | May 1990 |
| 29460 | Travers Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jul 2026 |
| 29461 | Traverse Oil Co And Federal Oil Co | | Oil & Gas Operator | Nov 1983 |
| 29462 | Traverse Oil Co. | | Oil & Gas Operator | Nov 1983 |
| 29463 | Travis E. Duren | | Oil Operator | Jul 1995 |
| 29464 | Travis Oil Co | Los Angeles, CA 90024 | Oil Operator | Jan 1990 |
| 29465 | Travis Operating, LLC | Kingwood, TX 77345 | Oil & Gas Operator | Jul 2026 |
| 29466 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2026 |
| 29467 | Travis, J. J., Trustee | Rockport, TX 78382 | Oil & Gas Operator | Dec 1996 |
| 29468 | Traxler, Joyce | Le Roy, NY 14482 | Gas Operator | Dec 2025 |
| 29469 | Traynor Oil & Gas Inc | Claremont, CA 91711-2837 | Oil & Gas Operator | Jan 2024 |
| 29470 | TRC Cypress Group LLC | | Oil & Gas Operator | Dec 2025 |
| 29471 | TRC Operating Company Inc. | | Oil & Gas Operator | May 2026 |
| 29472 | Tre'J Exploration, Inc. | | Gas Operator | Dec 1991 |
| 29473 | Treadaway Oil Co. | Balmorhea, TX 79718 | Oil & Gas Operator | Jul 2026 |
| 29474 | Treadstone Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2016 |
| 29475 | Treadstone Energy PRTNR Op, LLC | Katy, TX 77494 | Oil & Gas Operator | Jul 2026 |
| 29476 | Treat Howard | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2014 |
| 29477 | Trebole Operating Company | | Oil Operator | Jul 1979 |
| 29478 | Treco Oil Company | Albany, TX 76430 | Oil & Gas Operator | Jul 2026 |
| 29479 | Tredegar Properties, Inc. | | Oil Operator | Jun 1990 |
| 29480 | Tree Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2026 |
| 29481 | Trees Oil Compan | | Oil Operator | Jan 1995 |
| 29482 | Treichler, Terry A. | Sanburn, NY 14132 | Gas Operator | Dec 2025 |
| 29483 | Trejim Operators, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jul 2026 |
| 29484 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Mar 2026 |
| 29485 | Trek Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jul 2026 |
| 29486 | Trek Oil & Gas, Inc | Houston, TX 77002 | Oil Operator | Mar 1998 |
| 29487 | Trek Operating, LLC | Tulsa, OK 741520098 | Oil & Gas Operator | Mar 2021 |
| 29488 | Trek Petroleum Company, Inc. | Midland, TX 79707 | Oil & Gas Operator | Jul 2026 |
| 29489 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Jul 2026 |
| 29490 | Tremo Corporation | Toronto, KS 66777 | Oil Operator | May 1998 |
| 29491 | Tren Energy LLC | El Paso, TX 79912 | Oil & Gas Operator | Jul 2026 |
| 29492 | Trenchco Inc | Shawnee, OK 74802-3577 | Oil & Gas Operator | Apr 2015 |
| 29493 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 29494 | Trend Exploration I LLC | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 29495 | Trend Gas & Oil Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2000 |
| 29496 | Trend Oil Co | Petaluma, CA 94954 | Oil & Gas Operator | Feb 2017 |
| 29497 | Trendsetter Production Co | | Oil & Gas Operator | Jul 2008 |
| 29498 | Trendwell Energy Corporation | | Oil & Gas Operator | Jun 2026 |
| 29499 | Trenmor Gas & Oil Co LLC | Frazeysburg, OH 43822 | Oil Operator | Dec 2023 |
| 29500 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |