| 29401 | Two Oaks Operating Company, LLC. | Flower Mound, TX 75028 | Oil & Gas Operator | Mar 2008 |
| 29402 | Two P Partners, LLC | Golden, CO 80401 | Oil & Gas Operator | Apr 2024 |
| 29403 | Two Pines | Drumright, OK 74030-5502 | Oil & Gas Operator | Feb 2012 |
| 29404 | Twojo, Inc. | Longview, TX 75601 | Oil & Gas Operator | Nov 1996 |
| 29405 | TX Heat Of The Permian Basin Inc | Odessa, TX 79768 | Oil & Gas Operator | Dec 2021 |
| 29406 | TX Lone Star Operating Co, LLC | Sulphur SPGS, TX 75483 | Oil & Gas Operator | Apr 2024 |
| 29407 | TX Petroleum Company | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Apr 1996 |
| 29408 | Txco Resources Inc. | San Antonio, TX 78280 | Oil & Gas Operator | Apr 2024 |
| 29409 | Txla Energy, Inc. | Houston, TX 77018 | Oil & Gas Operator | Apr 2024 |
| 29410 | Txo Prod Corp.-Arkla Expl. Co. | | Oil & Gas Operator | Dec 1990 |
| 29411 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 29412 | Txo Production Corp/Amh O&G Co | | Oil & Gas Operator | Dec 1990 |
| 29413 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 29414 | Txok Texas Energy Resources,L.P. | Dallas, TX 75251 | Oil & Gas Operator | Apr 2008 |
| 29415 | Txon Partners, LLC | Houston, TX 77057 | Oil & Gas Operator | Jun 2017 |
| 29416 | TXP Operating Company | | Oil & Gas Operator | Jul 1992 |
| 29417 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | Apr 2024 |
| 29418 | Txu Fuel Company | Dallas, TX 75201 | Oil & Gas Operator | May 2004 |
| 29419 | Txu Gas Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2004 |
| 29420 | Txu Lone Star Pipeline | Dallas, TX 75201 | Oil & Gas Operator | Oct 2003 |
| 29421 | TXX Operating LLC | Shreveport, LA 71133 | Oil & Gas Operator | Apr 2024 |
| 29422 | Ty-Tex Exploration, Inc. | Tyler, TX 75711 | Oil Operator | Dec 2000 |
| 29423 | Tyco Incorporate | | Oil & Gas Operator | Oct 1995 |
| 29424 | Tyco Oil Co. | | Oil Operator | Oct 2023 |
| 29425 | Tyco Operating Co. | Throckmorton, TX 76483 | Oil & Gas Operator | Apr 2024 |
| 29426 | Tygr Operating Company, LLC | | Oil & Gas Operator | Nov 2023 |
| 29427 | Tyl Oil | Canon City, CO 81212 | Gas Operator | May 1994 |
| 29428 | Tyler Enterprises Inc | Bristow, OK 74010-3192 | Oil & Gas Operator | Feb 2004 |
| 29429 | Tyler Oil & Gas Inc. | Tyler, TX 75702 | Oil & Gas Operator | Sep 2004 |
| 29430 | Tyler Oil Company | Billings, MT 59104-3203 | Oil & Gas Operator | Nov 2019 |
| 29431 | Tyler Production, LLC | | Oil & Gas Operator | Jul 2013 |
| 29432 | Tyler Rockies Exploration LTD | Tyler, TX 75710-0119 | Oil & Gas Operator | Feb 2024 |
| 29433 | Tyluka Operations, LLC | Hays, KS 67601 | Oil Operator | Nov 2023 |
| 29434 | Tyner Texas Operating Company | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 29435 | Tyrex Oil Company | Casper, WY 82602 | Oil & Gas Operator | May 1997 |
| 29436 | Tyro Oil Develop | | Oil Operator | Jul 1991 |
| 29437 | Tyrok | | Oil & Gas Operator | Nov 2010 |
| 29438 | Tysco Oil And Gas Corp. | | Oil & Gas Operator | Jan 2024 |
| 29439 | Tyson Gary | Hobart, OK 73651-6413 | Oil & Gas Operator | Mar 2018 |
| 29440 | Tyson Oil Co. | | Oil Operator | Jan 2024 |
| 29441 | Tyson Olan | Hobart, OK 73651-6413 | Oil & Gas Operator | Apr 2015 |
| 29442 | U Bee Tea Production LLC | Culbertson, MT 59218 | Oil & Gas Operator | Feb 2024 |
| 29443 | U R C C | | Oil & Gas Operator | Jun 1991 |
| 29444 | U S Department Of Energy | | Oil & Gas Operator | Apr 1999 |
| 29445 | U S Drilling Company Inc | Holdenville, OK 74848-0913 | Oil & Gas Operator | Mar 2017 |
| 29446 | U S Energy Corp. Of Amer. Inc. | Ranger, TX 76470 | Oil & Gas Operator | Apr 2024 |
| 29447 | U S Exploraton Liq Trust | | Oil & Gas Operator | Oct 1994 |
| 29448 | U S Liquids Of La., L.P. | | Oil Operator | Apr 2014 |
| 29449 | U S Oil Reclaimers LLC | Drumright, OK 74030-1155 | Oil Operator | Jun 2023 |
| 29450 | U V Industries | | Oil & Gas Operator | Jan 1993 |
| 29451 | U-N-I Exploration & Development, Inc. | Yates Center, KS 66783 | Oil & Gas Operator | Jan 2003 |
| 29452 | U. D. Man, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2024 |
| 29453 | U. O. C., Inc. | | Oil Operator | Jun 2019 |
| 29454 | U. S. Operating, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Apr 2024 |
| 29455 | U.S. Capital Corp Of Am, Inc. | | Oil & Gas Operator | Aug 1998 |
| 29456 | U.S. Enercorp, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2004 |
| 29457 | U.S. Enercorp, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2019 |
| 29458 | U.S. Energy Development Corp | Arlington, TX 76011 | Oil & Gas Operator | Apr 2024 |
| 29459 | U.S. Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 29460 | U.S. Sovereign Oil And Gas, Inc. | Dallas, TX 75355 | Oil & Gas Operator | Apr 2024 |
| 29461 | U.S. Steel Mining Co., Inc. | | Gas Operator | Jan 2000 |
| 29462 | U.S. Steel Mining Co., LLC | | Gas Operator | Oct 2002 |
| 29463 | U.S.A. Plugging Company | Pearsall, TX 78061 | Oil & Gas Operator | Apr 2024 |
| 29464 | U1 Ranch Oil | Weesatche, TX 77993 | Oil & Gas Operator | Apr 2024 |
| 29465 | Uae Investco 1 (Estill), LLC | Ravenna, KY 40472 | Oil Operator | Dec 2022 |
| 29466 | Uae Investco 2 (Lee), LLC | Ravenna, KY 40472 | Oil Operator | Dec 2021 |
| 29467 | Ubetco, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Apr 2024 |
| 29468 | Uhc New Mexico Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2007 |
| 29469 | Uhc Petroleum Corporation | Rocksprings, TX 78880 | Oil & Gas Operator | Apr 2024 |
| 29470 | Uhl Oil Co., Inc. | Bradford, PA 16701 | Oil & Gas Operator | Dec 2022 |
| 29471 | Uhl, Robert | Bradford, PA 16701 | Oil & Gas Operator | Dec 2022 |
| 29472 | Uhls, Jimmie J. | Sedan, KS 67361 | Oil Operator | Sep 2019 |
| 29473 | Uinta Oil & Gas | Roosevelt, UT 84066 | Oil & Gas Operator | Nov 1997 |
| 29474 | Uinta Wax Operating, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Jan 2024 |
| 29475 | Uinta-Taylor Fund, LTD | Roosevelt, UT 84066 | Oil & Gas Operator | Nov 2018 |
| 29476 | Uintah Investors LLC | Orem, UT 84097 | Oil & Gas Operator | Feb 2024 |
| 29477 | Ulatex Oil & Gas Inc. | Nocona, TX 76255 | Oil & Gas Operator | Dec 1998 |
| 29478 | Ullrich Sandy J | | Oil Operator | Dec 2023 |
| 29479 | Ullum Oil And Gas Development Corporation, Inc. | Grantsville, WV 26147-0000 | Oil & Gas Operator | Dec 2021 |
| 29480 | Ulrich, William J. Jr.& Connie | | Gas Operator | Dec 2022 |
| 29481 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | Apr 2024 |
| 29482 | Ultra Petroleum (U.S.A.), Inc. | Granbury, TX 76048 | Oil & Gas Operator | Sep 2003 |
| 29483 | Ultra Production Company, LLC | Cedar Bluff, VA 24609 | Gas Operator | Oct 2014 |
| 29484 | Ultra Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Jan 2024 |
| 29485 | Ultramar Oil & Gas LTD | Houston, TX 77060 | Oil & Gas Operator | Jul 1995 |
| 29486 | Ultramar Production Company | | Oil & Gas Operator | Dec 1991 |
| 29487 | Ulysses, City Of | Ulysses, KS 67880 | Gas Operator | Dec 2023 |
| 29488 | Umberham Oil Company Inc | Oklahoma City, OK 73151-4000 | Oil & Gas Operator | Jan 2024 |
| 29489 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 29490 | Ummel'S Tank Ser | | Oil Operator | Sep 1994 |
| 29491 | Unbridled Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 29492 | Underground Energy Inc. | | Oil & Gas Operator | Nov 2023 |
| 29493 | Underwood Oil & Gas | Casper, WY 82602 | Oil & Gas Operator | Jan 2024 |
| 29494 | Underwood Oil And Gas LLC | | Oil & Gas Operator | Jan 2024 |
| 29495 | Underwood, Donald D. Dba Mustang Oil Co | Salem, WV 26426 | Oil & Gas Operator | Dec 2020 |
| 29496 | Underwood, Jim | Graham, TX 76450 | Oil & Gas Operator | Mar 2018 |
| 29497 | Uni Production Company, Inc. | | Oil & Gas Operator | Apr 1988 |
| 29498 | Unicorn Drilling Inc | Cody, WY 82414 | Oil Operator | Dec 1998 |
| 29499 | Unicorn Energy, Inc. | Elgin, TX 78621 | Oil & Gas Operator | Apr 2024 |
| 29500 | Unicorn Oil & Gas Co Inc | Dorset, OH 44032 | Oil & Gas Operator | Dec 1993 |