| 30201 | Tribal Oil Company | | Oil & Gas Operator | Dec 1981 |
| 30202 | Tribar Resources LLC | | Oil & Gas Operator | Nov 2025 |
| 30203 | Tribune Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 30204 | Tricentrol Resources Inc | Englewood, CO 80111 | Oil & Gas Operator | Jun 1984 |
| 30205 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 30206 | Trichel Contracting Company | | Oil & Gas Operator | Sep 1987 |
| 30207 | Trickle Down Oil, Inc. | | Oil & Gas Operator | Feb 2016 |
| 30208 | Trico Energy Corporation | | Oil Operator | May 1984 |
| 30209 | Trico Energy LLC | Hager Hill, KY 41222 | Oil Operator | Dec 2018 |
| 30210 | Trico Oil & Gas Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Dec 2025 |
| 30211 | Trico Oil Co., Inc. | | Gas Operator | Nov 1978 |
| 30212 | Trico/Tiger Development LLC | | Gas Operator | Dec 2017 |
| 30213 | Trident Corporation | Woodsboro, TX 78393 | Oil & Gas Operator | Dec 2025 |
| 30214 | Trident Oil & Gas Corp. | | Oil & Gas Operator | Sep 2000 |
| 30215 | Tridon Oil Inc | Lafayette, LA 70505-2305 | Gas Operator | Dec 2013 |
| 30216 | Triesco, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1996 |
| 30217 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 30218 | Triforce Energy LLC | Littleton, CO 80122 | Oil & Gas Operator | Dec 2025 |
| 30219 | Trigeo Energy, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 30220 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 30221 | Trigg Exploratio | | Gas Operator | Feb 1992 |
| 30222 | Trigg Oil Mining Corporation | | Oil & Gas Operator | Dec 2007 |
| 30223 | Trigger'S Disposal LLC | Sayre, OK 73662-2913 | Oil Operator | Sep 2022 |
| 30224 | Trigo Oil And Gas, LLC | Amarillo, TX 79101 | Oil & Gas Operator | Mar 2022 |
| 30225 | Trigon Exploration, Inc. | | Oil & Gas Operator | Jan 1999 |
| 30226 | Triken Oil & Gas | | Oil & Gas Operator | Feb 1995 |
| 30227 | Trilliant Energy Texas LTD | Tulsa, OK 74135-0767 | Oil & Gas Operator | Jun 2020 |
| 30228 | Trilogy Natural Resources LLC | Edmond, OK 73025 | Oil Operator | Sep 2025 |
| 30229 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2025 |
| 30230 | Trimble & Maclaskey Oil LLC | Gridley, KS 66852 | Oil Operator | Jun 2025 |
| 30231 | Trimble, Don G Dba Trimble Production Company | Houston, TX 77066 | Oil Operator | Jan 2025 |
| 30232 | Trimble, IVal L. | Gridley, KS 66852 | Oil Operator | Dec 2019 |
| 30233 | Trimont Energy LLC | Pittsburgh, PA 15211-1205 | Oil & Gas Operator | Dec 2016 |
| 30234 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 30235 | Trinidad Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Dec 2025 |
| 30236 | Trinidad Exploration, Inc. | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 30237 | Trinidad Petroleum Corporation | | Oil & Gas Operator | Apr 1990 |
| 30238 | Trinidad Petroleum, Inc. | Austin, TX 78711 | Oil & Gas Operator | Dec 2025 |
| 30239 | Trinidad Resources, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 30240 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Dec 2025 |
| 30241 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 30242 | Trinity Eor, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2019 |
| 30243 | Trinity Exploration Co | | Oil Operator | Dec 1998 |
| 30244 | Trinity Gas Corporation | Edmond, OK 73003 | Oil & Gas Operator | Dec 2025 |
| 30245 | Trinity Gas Storage, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Dec 2025 |
| 30246 | Trinity Group LLC | | Oil Operator | Dec 1997 |
| 30247 | Trinity Minerals&Operating Corp. | Abilene, TX 79605 | Oil & Gas Operator | Dec 1995 |
| 30248 | Trinity Oil & Gas Dev Inc | | Oil & Gas Operator | Jun 1994 |
| 30249 | Trinity Oil & Gas Inc | Pauls Valley, OK 73075 | Oil Operator | Jul 2025 |
| 30250 | Trinity Oil & Gas Producers LLC | Allen, OK 74825 | Oil & Gas Operator | Oct 2025 |
| 30251 | Trinity Operating & Prod., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 30252 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 30253 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 30254 | Trinity River Energy Oper, LLC | Houston, TX 77008 | Oil & Gas Operator | May 2018 |
| 30255 | Trinity River Energy, LLC | Houston, TX 77094 | Oil & Gas Operator | Aug 2015 |
| 30256 | Trinity River Operating Company | Oklahoma City, OK 73147 | Oil & Gas Operator | Dec 2025 |
| 30257 | Trinity University & Closuit | Loco Hills, NM 88255 | Oil & Gas Operator | Dec 2002 |
| 30258 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 30259 | Trio Consulting & MGMT LLC | Wichita Falls, TX 76301 | Oil Operator | Oct 2025 |
| 30260 | Trio Oil And Gas Company | Salem, WV 26426 | Oil & Gas Operator | Nov 2021 |
| 30261 | Trio Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | Feb 2004 |
| 30262 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 30263 | Trio Petroleum Corp. | Glenville, WV 26351-0880 | Oil & Gas Operator | Jul 2016 |
| 30264 | Trio Petroleum LLC | | Oil & Gas Operator | Oct 2025 |
| 30265 | Trio Production Company, LLC | Stephens, AR 71764 | Oil Operator | Jan 2025 |
| 30266 | Triple "B" Production DRLG Inc | Poynor, TX 75782 | Oil & Gas Operator | Sep 2022 |
| 30267 | Triple "G" Oil Company | Clyde, TX 79510 | Oil & Gas Operator | Apr 1999 |
| 30268 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 30269 | Triple "S" Gas, Inc. | Louisville, KY 40255 | Oil & Gas Operator | Dec 2025 |
| 30270 | Triple "S" Resources Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Jun 1995 |
| 30271 | Triple "S" Well Service, Inc. | Eureka, KS 67045 | Oil Operator | Apr 2025 |
| 30272 | Triple "W" Oil Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 30273 | Triple 'A' Energy, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 30274 | Triple 'H' Oil O | | Oil Operator | Apr 1992 |
| 30275 | Triple - I, Inc. | Kansas City, MO 64114 | Gas Operator | Oct 2000 |
| 30276 | Triple 7 Energy Company Inc | Prague, OK 74864 | Oil Operator | Feb 1997 |
| 30277 | Triple B Crude, LLC | Colony, KS 66015 | Oil Operator | Jun 2025 |
| 30278 | Triple B Energy Inc | Gillette, WY 82716 | Oil Operator | Dec 1999 |
| 30279 | Triple B Energy LLC | Dorset, OH 44032 | Oil & Gas Operator | Dec 2024 |
| 30280 | Triple B Resources | Barnsdall, OK 74002-9759 | Oil & Gas Operator | May 2014 |
| 30281 | Triple C Oil Inc. | Lockhart, TX 78644 | Oil Operator | Aug 2019 |
| 30282 | Triple C Petroleum LLC | Colony, KS 66015 | Oil Operator | Nov 2019 |
| 30283 | Triple C Properties Inc | Seminole, OK 74818 | Oil & Gas Operator | Jul 2025 |
| 30284 | Triple Crown Operating LLC | Tulsa, OK 74114 | Oil Operator | Jun 2025 |
| 30285 | Triple Crown Resources, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 30286 | Triple D Oil & Gas Co., Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2025 |
| 30287 | Triple Diamond Energy Operating LLC | Dallas, TX 75254-8352 | Oil & Gas Operator | Jun 2014 |
| 30288 | Triple E Drillin | | Oil Operator | Jun 1992 |
| 30289 | Triple E Oil | Sterling, KS 67579 | Oil & Gas Operator | Mar 1999 |
| 30290 | Triple G Oil & Gas | Sonora, TX 76950 | Oil & Gas Operator | Oct 2022 |
| 30291 | Triple G Oilfiel | | Oil & Gas Operator | Dec 1985 |
| 30292 | Triple G Well Service, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 30293 | Triple Gas Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1984 |
| 30294 | Triple H Operating | Tryon, OK 74875-6235 | Oil Operator | Apr 2022 |
| 30295 | Triple H Production | Stockdale, TX 78160 | Oil Operator | Dec 2025 |
| 30296 | Triple J Investments Inc | Longview, TX 75606 | Oil & Gas Operator | Feb 2023 |
| 30297 | Triple J L.L.C. | Coffeyville, KS 67336 | Oil Operator | Mar 1999 |
| 30298 | Triple J Oil Co. | Pampa, TX 79065 | Oil & Gas Operator | Aug 1996 |
| 30299 | Triple J Prod In | | Oil Operator | Sep 1989 |
| 30300 | Triple K | | Oil Operator | Jun 2007 |