| 3901 | Rupe Oil Company Inc | Wichita, KS 67278 | Oil & Gas Operator | Sep 2025 |
| 3902 | Rush Oil & Gas C | | Oil Operator | Dec 1995 |
| 3903 | Rush, Terry L. | Wakeeney, KS 67672 | Oil Operator | Sep 2025 |
| 3904 | Rushmore & Tresn | | Oil Operator | Jan 1995 |
| 3905 | Russco Energy In | | Oil Operator | Jun 1994 |
| 3906 | Russco Energy, Inc. | Gladstone, MO 64118 | Oil Operator | Apr 2002 |
| 3907 | Russell Gas Co., LLC | Hugoton, KS 67451 | Gas Operator | Sep 2025 |
| 3908 | Russell James E | | Oil Operator | Apr 1994 |
| 3909 | Russell Oil, Inc. | Edmond, OK 73083 | Oil Operator | Sep 2025 |
| 3910 | Russell, Gerald W. | Tulsa, OK 74103 | Oil Operator | Feb 1986 |
| 3911 | Ryan, Daniel J. | Oklahoma City, OK 73139 | Oil Operator | Sep 2003 |
| 3912 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Feb 2026 |
| 3913 | S & B Oil Oper - | | Oil Operator | Dec 1996 |
| 3914 | S & B Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Feb 2026 |
| 3915 | S & C Construction, Inc. | Whitefish, MT 59937 | Oil & Gas Operator | Feb 2026 |
| 3916 | S & H Oilfield Enterprises | | Oil & Gas Operator | Sep 2023 |
| 3917 | S & J Oil | Hays, KS 67601 | Oil Operator | Feb 2002 |
| 3918 | S & J Oil Company | Ellinwood, KS 67526 | Oil Operator | Jun 2000 |
| 3919 | S & J Operating | | Oil Operator | May 1989 |
| 3920 | S & K Oil Compan | | Oil Operator | Sep 1989 |
| 3921 | S & K Oil Production, Inc. | Blue Mound, KS 66010 | Oil Operator | Sep 2025 |
| 3922 | S & M Oil | Hays, KS 67601 | Oil Operator | Aug 2003 |
| 3923 | S & M Oil - Craw | | Oil Operator | Dec 1995 |
| 3924 | S & S Oil | Ponca City, OK 74601 | Oil & Gas Operator | Dec 2009 |
| 3925 | S & S Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jul 2016 |
| 3926 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Feb 2026 |
| 3927 | S & S Oil Leasing | Chase, KS 67524 | Oil Operator | Sep 2025 |
| 3928 | S & S Oil, L.L.C. | Chase, KS 67524 | Oil Operator | Sep 2025 |
| 3929 | S & T Oil Compan | | Oil Operator | Feb 1984 |
| 3930 | S & V Oil Incorp | | Oil & Gas Operator | Apr 1990 |
| 3931 | S & W Drilling C | | Oil Operator | May 1985 |
| 3932 | S & W Oil & Gas, LLC | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 3933 | S & W Oil Compan | | Oil Operator | Dec 1986 |
| 3934 | S C B Oil Co. | Fredonia, KS 66736 | Gas Operator | Dec 2009 |
| 3935 | S C Z Oil Compan | | Oil & Gas Operator | Feb 1995 |
| 3936 | S-2 Oil Company | | Oil Operator | Mar 1994 |
| 3937 | S. R. Weilert Oil LLC | Wichita, KS 67208 | Oil Operator | Nov 2005 |
| 3938 | S.B. Oil Company, A General Partnership | Hays, KS 67601 | Oil Operator | Sep 2019 |
| 3939 | S.C.Z. Oil Company | Cherryvale, KS 67335 | Gas Operator | Dec 2003 |
| 3940 | S.J. Titan Co., A General Partnership | Hutchinson, KS 67502 | Oil & Gas Operator | May 2015 |
| 3941 | Saaw Operating LLC | Protection, KS 67127 | Oil & Gas Operator | Sep 2025 |
| 3942 | Sabine Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Jul 1996 |
| 3943 | Sabine Productio | | Oil & Gas Operator | Mar 1994 |
| 3944 | Sabre Exploratio | | Oil Operator | Oct 1988 |
| 3945 | Sabre Exploration, LLC | Wichita, KS 67205 | Oil Operator | Sep 2025 |
| 3946 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 3947 | Saco Oil Company | El Dorado, KS 67042 | Oil Operator | Jan 2001 |
| 3948 | Sag Oil Company LLC | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 3949 | Sage Drilling Co Inc | Wichita, KS 67202 | Oil & Gas Operator | Nov 1998 |
| 3950 | Sage NR Ok LLC | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2025 |
| 3951 | Sage, Larry George | Virgil, KS 66870 | Oil Operator | Dec 2019 |
| 3952 | Sagebrush Operating LLC | Denver, CO 80203 | Oil & Gas Operator | Aug 2025 |
| 3953 | Salt Creek Production, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Feb 2026 |
| 3954 | Salt Creek Resources, LLC | Caney, KS 67333 | Oil Operator | Oct 2019 |
| 3955 | Salt Fork Produc | | Oil Operator | Oct 1987 |
| 3956 | Sam W Mays Jr LLC | Eureka, KS 67045 | Oil & Gas Operator | Apr 2018 |
| 3957 | Samco Investments | | Oil Operator | Jul 2025 |
| 3958 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 3959 | Samson Properties, Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2008 |
| 3960 | Samson Resources | | Oil Operator | Jan 1994 |
| 3961 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 3962 | Samuel Gary Jr. & Assoc., Inc. | | Oil & Gas Operator | Mar 2023 |
| 3963 | Samuel Gary Jr. & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 3964 | Samuel Jackson Production Co | | Oil Operator | Sep 2025 |
| 3965 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Dec 2025 |
| 3966 | San Pet Inc | McPherson, KS 67460 | Oil Operator | May 1997 |
| 3967 | San Saba Energy | Hays, KS 67601 | Oil Operator | May 1998 |
| 3968 | Sananco Energy C | | Oil Operator | Aug 1987 |
| 3969 | Sand Bar Oil Com | | Oil Operator | Jun 1986 |
| 3970 | Sand Dollar Ener | | Oil Operator | Aug 1984 |
| 3971 | Sand Point LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Dec 2020 |
| 3972 | Sandefer Larry | | Oil Operator | Aug 1993 |
| 3973 | Sanders, Arthur J. | Wichita, KS 67217 | Oil Operator | Nov 1989 |
| 3974 | Sanders, Jack W | Wellsville, KS 66092 | Oil Operator | Feb 1996 |
| 3975 | Sandhill L.L.C. | Wichita, KS 67202 | Gas Operator | Jun 2003 |
| 3976 | Sandhills Oil Co. | Copan, OK 74022 | Oil Operator | Aug 1997 |
| 3977 | Sandlin Oil Corp | Dacono, CO 80514 | Oil & Gas Operator | Dec 2025 |
| 3978 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Feb 2026 |
| 3979 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 3980 | Santa Fe Mineral | | Gas Operator | Oct 1994 |
| 3981 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 3982 | Santa Fe Pipe & | | Oil & Gas Operator | Dec 1991 |
| 3983 | Satchell Creek Petroleum, LLC | Wichita, KS 67205 | Oil Operator | Jul 2024 |
| 3984 | Sauder Earl W | | Oil & Gas Operator | Jan 1992 |
| 3985 | Sauder George E | | Oil Operator | Nov 1996 |
| 3986 | Sauder Oil Co., LLC | Madison, KS 66860 | Oil Operator | Sep 2025 |
| 3987 | Sauder, Earl W. (Deceased) | Emporia, KS 66801 | Oil & Gas Operator | Nov 1997 |
| 3988 | Sauvage W W Inco | | Oil Operator | Nov 1989 |
| 3989 | Savage James F | | Oil Operator | Dec 1996 |
| 3990 | Sawdust Oil Comp | | Oil & Gas Operator | May 1987 |
| 3991 | Saxon Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Oct 2009 |
| 3992 | Saye, Doyal A. | Dennis, KS 67341 | Gas Operator | Aug 2016 |
| 3993 | Scavenger Oil Company Inc | Englewood, CO 80111 | Oil & Gas Operator | Mar 2000 |
| 3994 | Schaben Oil LLC | Hays, KS 67601 | Oil Operator | Aug 2025 |
| 3995 | Schankie & Sons, LLC | Madison, KS 66860 | Oil Operator | Sep 2025 |
| 3996 | Schankie Well Se | | Oil Operator | Mar 1995 |
| 3997 | Schankie Well Service, Inc. | Madison, KS 66860 | Oil Operator | Sep 2025 |
| 3998 | Scheck Oil Operation | | Oil & Gas Operator | Sep 2025 |
| 3999 | Scheibmeir, Daryl | Piqua, KS 66761 | Oil Operator | Aug 2025 |
| 4000 | Scheuneman, Lester | Ridgeway, MO 64481 | Oil Operator | May 2019 |