| 29001 | Synergy Resources Corporation | | Oil & Gas Operator | Oct 2022 |
| 29002 | Syntax Energy Corporation | Denton, TX 76210 | Oil Operator | Apr 2025 |
| 29003 | Synthetic Energy Corporation | Houston, TX 77006 | Oil Operator | Apr 2025 |
| 29004 | Szumigala, Edward R. & Ruth A. | Dunkirk, NY 14048 | Gas Operator | Dec 2023 |
| 29005 | T & A Resources LLC | Salyersville, KY 41465 | Oil Operator | Dec 2023 |
| 29006 | T & B Oil Company Inc | Ardmore, OK 73401-3709 | Oil & Gas Operator | Apr 2015 |
| 29007 | T & B Resources | | Oil & Gas Operator | Jul 1990 |
| 29008 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 29009 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 29010 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 29011 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 29012 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 29013 | T & D Oil LLC | Sand Springs, OK 74063 | Oil & Gas Operator | Jan 2025 |
| 29014 | T & F Exploration, LP | Pittsburgh, PA 15241-1375 | Oil & Gas Operator | Oct 2024 |
| 29015 | T & F Oil Company | | Oil Operator | Jan 2025 |
| 29016 | T & F Oil Company, LLC | | Oil Operator | Oct 2011 |
| 29017 | T & G Energy LLC | Dallas, TX 75230 | Oil Operator | Nov 2010 |
| 29018 | T & G Holding LLC | Pauls Valley, OK 73075-8663 | Oil & Gas Operator | Mar 2015 |
| 29019 | T & G Oil, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2010 |
| 29020 | T & H Drilling | Middleport, OH 45760 | Oil & Gas Operator | Dec 2009 |
| 29021 | T & I Petroleum Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2005 |
| 29022 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | Jan 2025 |
| 29023 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 29024 | T & K Oil Inc | Stephens, AR 71764 | Oil Operator | Aug 2024 |
| 29025 | T & L Oil Production | | Oil Operator | Jan 2025 |
| 29026 | T & L Production | | Oil Operator | May 1987 |
| 29027 | T & L Production Company | | Oil Operator | Feb 1984 |
| 29028 | T & M Gauging | | Oil Operator | Oct 2006 |
| 29029 | T & M Oil & Royalty | Ada, OK 74820 | Oil Operator | Feb 2012 |
| 29030 | T & M Oil Company | Midlothian, TX 76065 | Oil & Gas Operator | Apr 2025 |
| 29031 | T & O Gas Co | | Oil Operator | May 2001 |
| 29032 | T & P Exploration | Addison, TX 75006 | Oil & Gas Operator | Aug 1993 |
| 29033 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 29034 | T & R Investments, Inc. | Borger, TX 79008 | Oil & Gas Operator | Nov 1995 |
| 29035 | T & R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 29036 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 29037 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 29038 | T & T Compression Inc | Clymer, PA 15728-1014 | Gas Operator | Dec 2024 |
| 29039 | T & T Contracting Dba Hulman Contracting, LLC | Rockfield, KY 42274 | Oil & Gas Operator | Dec 2023 |
| 29040 | T & T Oil Co. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2002 |
| 29041 | T & T Production Co. | Victoria, TX 77902 | Oil & Gas Operator | Feb 1995 |
| 29042 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Jan 2025 |
| 29043 | T - C Oil Company | Refugio, TX 78377 | Oil & Gas Operator | Jan 2012 |
| 29044 | T And L Oil Inc | Tonkawa, OK 74653-4530 | Oil & Gas Operator | Jan 2025 |
| 29045 | T B C Inc | Coweta, OK 74429 | Oil & Gas Operator | Apr 2020 |
| 29046 | T B Drilling Co | Moxahala, OH 43761 | Oil & Gas Operator | Dec 1998 |
| 29047 | T B K Energy Company | New Braunfels, TX 78130 | Oil & Gas Operator | Feb 2025 |
| 29048 | T Bar M Energy Resources LLC | Mounds, OK 74047 | Oil & Gas Operator | Jan 2025 |
| 29049 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 29050 | T C M LLC | | Gas Operator | Jun 2009 |
| 29051 | T C Production | | Oil Operator | May 1994 |
| 29052 | T D Energy Company Inc | Broken Arrow, OK 74011-3953 | Oil & Gas Operator | Feb 2015 |
| 29053 | T Dozer D Oil Co. | Goree, TX 76363 | Oil & Gas Operator | Apr 2025 |
| 29054 | T E F Inc | Madill, OK 73446-6656 | Oil & Gas Operator | Jul 2023 |
| 29055 | T E L Oil & Gas Corporation | Guymon, OK 73941 | Gas Operator | Jan 2025 |
| 29056 | T G & S Oil | Marietta, OK 73448 | Oil & Gas Operator | Dec 2024 |
| 29057 | T H Production Co. | | Oil & Gas Operator | Mar 1994 |
| 29058 | T I Energy Services Inc | | Oil & Gas Operator | Dec 2003 |
| 29059 | T Investments Inc | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Mar 2011 |
| 29060 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 29061 | T J Water Works, A Texas LLC | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2025 |
| 29062 | T JS Oil & Gas Inc | Fresno, OH 43824 | Oil & Gas Operator | Dec 2023 |
| 29063 | T L C Oil Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 29064 | T M Hopkins Operating Co | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 29065 | T P Operating LLC | | Oil & Gas Operator | Nov 1999 |
| 29066 | T P Production Co | Denver, CO 80202 | Oil & Gas Operator | Nov 1996 |
| 29067 | T S B T Oil & Gas Properties | Moore, OK 73160-8126 | Oil & Gas Operator | Jan 2018 |
| 29068 | T T & T Inc | Shawnee, OK 74802-3694 | Oil & Gas Operator | Jan 1994 |
| 29069 | T W Clemons Operating Co., LLC | Minden, LA 71055 | Oil & Gas Operator | Apr 2025 |
| 29070 | T W Law LLC | Muskogee, OK 74403-6736 | Oil Operator | Jan 2025 |
| 29071 | T X P Inc Formerly Petrotech Inc | | Oil & Gas Operator | Jul 1992 |
| 29072 | T&R Energy Services | Pampa, TX 79065 | Oil & Gas Operator | Apr 2025 |
| 29073 | T&T Energy LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 29074 | T, F & B Oil Company, LLC | | Oil Operator | Jan 2013 |
| 29075 | T-5 Leasing, LLC | | Oil Operator | Dec 2013 |
| 29076 | T-Bar Exploration, Inc. | Sterling, KS 67579 | Oil Operator | Apr 1998 |
| 29077 | T-Bar-X Limited Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2005 |
| 29078 | T-Boc Inc. | | Oil & Gas Operator | Apr 2016 |
| 29079 | T-C Oil Company, LLC | Refugio, TX 78377 | Oil & Gas Operator | Apr 2025 |
| 29080 | T-D Oil Inc | Cement, OK 73017-0065 | Oil & Gas Operator | May 2020 |
| 29081 | T-K Exploration Company | Oklahoma City, OK 73102-7029 | Oil & Gas Operator | Mar 2015 |
| 29082 | T-M Well Service | Jefferson, TX 75657 | Oil & Gas Operator | Sep 2004 |
| 29083 | T-M Well Service, L.L.C. | Jefferson, TX 75657 | Oil & Gas Operator | Dec 2024 |
| 29084 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 29085 | T-Rex Oil Inc | Broomfield, CO 80021 | Oil Operator | Feb 2011 |
| 29086 | T-Square Petroleum Co. | Rising Star, TX 76471 | Oil & Gas Operator | Apr 2025 |
| 29087 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 29088 | T. A. Atkinson Opr. | | Gas Operator | Dec 1997 |
| 29089 | T. A. W. Company | Kingsbury, TX 78638 | Oil & Gas Operator | Apr 2025 |
| 29090 | T. And M. Production | Oil City, LA 71061 | Oil & Gas Operator | Apr 2025 |
| 29091 | T. C. Morrow Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 29092 | T. D. Tedder | | Oil Operator | Dec 1991 |
| 29093 | T. E. Adams Petroleum Corp. | | Oil & Gas Operator | Dec 2024 |
| 29094 | T. J. Guido | | Oil & Gas Operator | Oct 1998 |
| 29095 | T. J. Lundy | | Oil Operator | Jan 2025 |
| 29096 | T. J. Oil And Gas, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 29097 | T. J. Operating Co., Inc. | | Oil & Gas Operator | Aug 1998 |
| 29098 | T. K. Stanley, Inc. | | Oil & Gas Operator | Jul 1982 |
| 29099 | T. L. J. Incorporated | Big Lake, TX 76932 | Oil & Gas Operator | Dec 1998 |
| 29100 | T. L. James & Co., Inc. | | Oil & Gas Operator | Oct 1992 |