| 4001 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 4002 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 4003 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 4004 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |
| 4005 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 4006 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Feb 2024 |
| 4007 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Dec 2023 |
| 4008 | Sun Oil Company | Arlington, TX 76006 | Oil & Gas Operator | Dec 2021 |
| 4009 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 4010 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 4011 | Sunburst Explora | | Oil Operator | May 1990 |
| 4012 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 4013 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 4014 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 4015 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2023 |
| 4016 | Sunfire Energy | | Oil & Gas Operator | Nov 2023 |
| 4017 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 4018 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Dec 2023 |
| 4019 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Oct 2023 |
| 4020 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 4021 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 4022 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 4023 | Sunswept Operating LLC | Oklahoma City, OK 73162 | Oil Operator | Nov 2023 |
| 4024 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 4025 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Dec 2023 |
| 4026 | Superior Oil Com | | Oil & Gas Operator | Dec 1994 |
| 4027 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | Nov 2023 |
| 4028 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 4029 | Supra Energy, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | May 1997 |
| 4030 | Sutton Investmen | | Oil Operator | Mar 1987 |
| 4031 | SW Gas Stge | | Gas Operator | Oct 2015 |
| 4032 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 4033 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 4034 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2024 |
| 4035 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 4036 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 4037 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 4038 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 4039 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 4040 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 4041 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 4042 | T & L Production | | Oil Operator | May 1987 |
| 4043 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 4044 | T & R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 4045 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 4046 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Jan 2024 |
| 4047 | T C Production | | Oil Operator | May 1994 |
| 4048 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 4049 | T-Bar Exploration, Inc. | Sterling, KS 67579 | Oil Operator | Apr 1998 |
| 4050 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 4051 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Apr 2024 |
| 4052 | T.C.G. Oil Co. | Iola, KS 66749 | Oil Operator | Sep 2009 |
| 4053 | T.C.G. Oil Co., A General Partnership | Laharpe, KS 66755 | Oil Operator | Aug 2009 |
| 4054 | T.J. Oil | | Oil Operator | Nov 2023 |
| 4055 | Taft Oil And Gas LLC | Bonham, TX 75418 | Oil & Gas Operator | Dec 2018 |
| 4056 | Tailwater, Inc. | Oklahoma City, OK 73154 | Oil Operator | Aug 2023 |
| 4057 | Talley Resources | | Oil Operator | Jun 1994 |
| 4058 | Tallgrass Explor | | Oil Operator | Sep 1987 |
| 4059 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Dec 2023 |
| 4060 | Tamoil | | Oil Operator | May 2017 |
| 4061 | Tanner, M.B. | Moline, KS 67353 | Oil Operator | Apr 1986 |
| 4062 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 4063 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2024 |
| 4064 | Targa Pipeline Mid-Continent Westok LLC | Sulphur, LA 70665 | Gas Operator | Dec 2023 |
| 4065 | Taurus Oil Compa | | Oil Operator | Oct 1994 |
| 4066 | Tauy Oil, Inc | Baldwin City, KS 66006 | Oil Operator | Dec 2023 |
| 4067 | Taylor Explorati | | Oil & Gas Operator | Jun 1985 |
| 4068 | Taylor Florence | | Oil Operator | Mar 1995 |
| 4069 | Taylor Oil Co. | Edmond, OK 73034 | Oil & Gas Operator | Dec 2023 |
| 4070 | Taylor-Brown Ope | | Oil Operator | Sep 1988 |
| 4071 | Taylor-Cranor Oi | | Oil Operator | Dec 1987 |
| 4072 | Tdi, Inc. | Hays, KS 67601 | Oil Operator | Dec 2023 |
| 4073 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | Dec 2023 |
| 4074 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | Dec 2023 |
| 4075 | Te-Pe Oil & Gas | | Oil & Gas Operator | Dec 2023 |
| 4076 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2024 |
| 4077 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 4078 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 4079 | Tec Resources, L.L.C. | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 4080 | Tech American Re | | Oil Operator | Sep 1985 |
| 4081 | Teg Midcontinent, Inc. | Aurora, CO 80014 | Oil Operator | Jul 2013 |
| 4082 | Tehi Illinois, LLC | Olney, IL 62450 | Oil & Gas Operator | Apr 2022 |
| 4083 | Teichgraeber Oil | | Oil Operator | Nov 1995 |
| 4084 | Teichgraeber Oil Co. | | Oil Operator | Dec 1994 |
| 4085 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Jul 2023 |
| 4086 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 4087 | Teko Oil & Gas I | | Oil Operator | Aug 1992 |
| 4088 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 4089 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 4090 | Tenex Oil Corpor | | Oil Operator | May 1991 |
| 4091 | Tengasco, Inc. | Houston, TX 77063 | Oil & Gas Operator | Dec 2023 |
| 4092 | Tenison Oil Comp | | Oil Operator | Jan 1993 |
| 4093 | Tenk, Lawrence O. | Ottawa, KS 66067 | Oil & Gas Operator | Oct 1998 |
| 4094 | Tenneco Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 4095 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Nov 2023 |
| 4096 | Terra Max Energy | | Oil Operator | Mar 1986 |
| 4097 | Terra Resc Incor | | Oil Operator | Mar 1986 |
| 4098 | Terrol Energy In | | Oil Operator | Feb 1993 |
| 4099 | Terrol Energy, Inc. | Hygiene, CO 80533 | Oil & Gas Operator | Dec 2006 |
| 4100 | Tesoro Petroleum | | Oil Operator | Mar 1982 |