| 28001 | TB Properties | | Oil & Gas Operator | Feb 2024 |
| 28002 | TBC Petroleum | Cuero, TX 77954 | Oil & Gas Operator | Sep 2023 |
| 28003 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 28004 | Tbi Production Company | Lakewood, CO 80228 | Oil & Gas Operator | Oct 2004 |
| 28005 | TBM Catarina, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2024 |
| 28006 | TBR Operating Company Inc. | | Gas Operator | Dec 2023 |
| 28007 | TC Energy LLC | Covington, OK 73730-2116 | Oil & Gas Operator | Sep 2014 |
| 28008 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | May 2024 |
| 28009 | TC Oil LLC | | Oil Operator | Feb 2024 |
| 28010 | TC3 Energy Company | Dallas, TX 75248 | Oil & Gas Operator | May 2024 |
| 28011 | TC3 Energy Services Company | Bryan, TX 77805 | Oil & Gas Operator | Jan 2005 |
| 28012 | TC3 Operating Co. | Dallas, TX 75248 | Oil & Gas Operator | Jul 1996 |
| 28013 | TCF Energy, Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 28014 | TCF Inc | | Gas Operator | Dec 1993 |
| 28015 | Tchefuncte Natural Resources, L.L.C. | | Oil & Gas Operator | Aug 2011 |
| 28016 | Tcina Inc | Seminole, OK 74818-0470 | Oil & Gas Operator | May 2023 |
| 28017 | TCS Petroleum Co., LLC | Abilene, TX 79608 | Oil & Gas Operator | May 2024 |
| 28018 | TCT Operating Company, Inc. | Johnson City, TX 78636 | Oil & Gas Operator | Feb 2017 |
| 28019 | TD & Associates, Inc. | | Oil & Gas Operator | Jun 1998 |
| 28020 | TD Oil & Gas LLC | Duncan, OK 73533-1851 | Oil Operator | Apr 2023 |
| 28021 | TD Operating Inc | El Reno, OK 73036-1035 | Oil & Gas Operator | Feb 2024 |
| 28022 | TDC Energy Corporation | | Oil & Gas Operator | Dec 2001 |
| 28023 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2024 |
| 28024 | Tdi, Inc. | Hays, KS 67601 | Oil Operator | Jan 2024 |
| 28025 | Tdoc, Inc | Evansville, IN 47716 | Oil Operator | Dec 2022 |
| 28026 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | Jan 2024 |
| 28027 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | Jan 2024 |
| 28028 | TDT Production, Inc. | Capitola, CA 95010 | Oil & Gas Operator | Aug 2003 |
| 28029 | TDX Energy, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2023 |
| 28030 | Te-Pe Oil & Gas | | Oil & Gas Operator | Jan 2024 |
| 28031 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2024 |
| 28032 | Te-Ray Resources, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Mar 2015 |
| 28033 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2024 |
| 28034 | Teaco | Snyder, TX 79550 | Oil & Gas Operator | Jan 1998 |
| 28035 | Teafatiller Limuel & Rita | Marietta, OK 73448-0321 | Oil & Gas Operator | Feb 2002 |
| 28036 | Teagarden David W | Glenford, OH 43739 | Oil & Gas Operator | Dec 2020 |
| 28037 | Teague Operating Co. | Mabank, TX 75147 | Oil & Gas Operator | Jul 1995 |
| 28038 | Teague, J. V. & Robinson, E. W. | Olney, TX 76374 | Oil & Gas Operator | May 1996 |
| 28039 | Teakwood Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2019 |
| 28040 | Teal Energy USA, Inc. | Houston, TX 77057 | Oil & Gas Operator | May 2024 |
| 28041 | Teal Exploration, LLC | Abilene, TX 79602 | Oil Operator | May 2024 |
| 28042 | Teal Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Oct 2021 |
| 28043 | Teal Petroleum Co. | | Oil & Gas Operator | Sep 1978 |
| 28044 | Teale F William | Tulsa, OK 74136-1017 | Oil & Gas Operator | Jun 2000 |
| 28045 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | May 2024 |
| 28046 | Teamco Operating LLC | Houston, TX 77042 | Oil & Gas Operator | Oct 2002 |
| 28047 | Teapot Oil & Refining Company | Billings, MT 59101 | Oil & Gas Operator | Mar 2012 |
| 28048 | Teavee Oil & Gas, Inc. | Charleston, WV 25301-0000 | Oil & Gas Operator | Dec 2021 |
| 28049 | Tebco Oil & Gas | | Oil & Gas Operator | Sep 1996 |
| 28050 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 28051 | Tec Pipeline LLC | Tulsa, OK 74128 | Oil & Gas Operator | Mar 2015 |
| 28052 | Tec Resources, L.L.C. | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 28053 | Tech American Re | | Oil Operator | Sep 1985 |
| 28054 | Tech Resources, Inc. | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2001 |
| 28055 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jan 2024 |
| 28056 | Technology & Engr. Careers Inc. | Houston, TX 77063 | Oil Operator | Dec 2017 |
| 28057 | Teco Oil & Gas, Inc. | Tampa, FL 33601 | Oil & Gas Operator | Nov 1997 |
| 28058 | Teco Operating Company | Athens, TX 75751 | Oil & Gas Operator | Jun 2001 |
| 28059 | Tecolote Energy Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 28060 | Tecolote Petroleum Corp.,Inc. | Friendswood, TX 77546 | Oil & Gas Operator | Mar 2011 |
| 28061 | Tecpetrol Operating LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2015 |
| 28062 | Tecton Energy Operating LLC | | Oil Operator | Apr 2009 |
| 28063 | Ted Koble Operator | | Oil & Gas Operator | Nov 2007 |
| 28064 | Tedco | | Gas Operator | Nov 1988 |
| 28065 | Tedik Limited Partnership | Williamson, WV 25661-0000 | Gas Operator | Dec 2021 |
| 28066 | Tee Cee'S Inc | Drumright, OK 74030-3855 | Oil & Gas Operator | Jan 2024 |
| 28067 | Tee Operating Company | | Oil & Gas Operator | Jun 1989 |
| 28068 | Teepee Oil & Gas Inc | Yukon, OK 73085-0557 | Oil Operator | Dec 2006 |
| 28069 | Teg Midcontinent, Inc. | Aurora, CO 80014 | Oil Operator | Jul 2013 |
| 28070 | Tega Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2012 |
| 28071 | Tehi Illinois, LLC | Olney, IL 62450 | Oil & Gas Operator | Apr 2022 |
| 28072 | Teichgraeber Oil | | Oil Operator | Nov 1995 |
| 28073 | Teichgraeber Oil Co. | | Oil Operator | Dec 1994 |
| 28074 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Jan 2024 |
| 28075 | Tej Ventures | | Oil & Gas Operator | Dec 2002 |
| 28076 | Tejas Gas Pipeline Company | Houston, TX 77010 | Oil & Gas Operator | Apr 1998 |
| 28077 | Tejas Gas Pipeline, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2002 |
| 28078 | Tejas Jack Sales, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | May 2024 |
| 28079 | Tejas Operating Company, Inc. | Houston, TX 77257 | Oil & Gas Operator | May 1995 |
| 28080 | Tejas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | May 2024 |
| 28081 | Tejas Operators, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 28082 | Tejas Petroleum Resources, LLC | Aubrey, TX 76227 | Oil & Gas Operator | May 2024 |
| 28083 | Tejas Production Company | | Oil Operator | Nov 1979 |
| 28084 | Tejas Trucking, Inc. | Andrews, TX 79714 | Oil & Gas Operator | May 2024 |
| 28085 | Tejas Western Corp. | Granbury, TX 76048 | Oil & Gas Operator | Jul 2018 |
| 28086 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | May 2024 |
| 28087 | Teke Production LLC | Austin, TX 78746 | Oil Operator | May 2024 |
| 28088 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 28089 | Tekna Synergy Corporation | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 28090 | Teko Oil & Gas I | | Oil Operator | Aug 1992 |
| 28091 | Teleo Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2009 |
| 28092 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2024 |
| 28093 | Telico Minerals, L.L.C. | | Oil & Gas Operator | Sep 2019 |
| 28094 | Tellurian Operating LLC | | Oil & Gas Operator | Dec 2023 |
| 28095 | Tellus Energy, LLC | | Oil & Gas Operator | Dec 2023 |
| 28096 | Tellus Operating Group, LLC | | Oil & Gas Operator | Jan 2024 |
| 28097 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | May 2024 |
| 28098 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 28099 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 28100 | Temagami Oil & Gas LTD | | Oil & Gas Operator | May 2007 |