| 3901 | Sek Oil Incorpor | | Oil Operator | Jun 1985 |
| 3902 | Seminole Senora Sand Unit #1, LLC | Rogers, AR 72758 | Gas Operator | Sep 2010 |
| 3903 | Sensor Oil & Gas Inc | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 3904 | Sentinel Petroleum Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2020 |
| 3905 | Serendipity Production Company LC | Guthrie, OK 73044 | Oil & Gas Operator | Apr 2020 |
| 3906 | Servco Productio | | Oil Operator | Dec 1992 |
| 3907 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 3908 | Ses Oil | | Oil Operator | Jun 2004 |
| 3909 | Seydell, E. Morris | Wichita Falls, TX 76307 | Oil Operator | Feb 1993 |
| 3910 | Seymour Oil Co., Inc. | Edmond, OK 73025 | Oil & Gas Operator | Jul 2011 |
| 3911 | SH Oil Operations LLC | Wichita, KS 67277 | Oil & Gas Operator | Mar 2025 |
| 3912 | Shade Tree Oil C | | Oil Operator | Oct 1987 |
| 3913 | Shaffer Oil Co., Inc. | Burlington, KS 66839 | Oil & Gas Operator | Jul 2001 |
| 3914 | Shaffer Oil Leas | | Oil Operator | May 1993 |
| 3915 | Shaida, John H. | Wichita, KS 67226 | Oil & Gas Operator | Jul 2025 |
| 3916 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | May 2025 |
| 3917 | Sharon Resources | | Oil Operator | Sep 1995 |
| 3918 | Sharon Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 2010 |
| 3919 | Sharp Engineerin | | Oil Operator | Aug 1995 |
| 3920 | Sharp, Harry D. | Leawood, KS 66209 | Oil Operator | May 1997 |
| 3921 | Sharp, Robert L. &/Or Cindy | | Oil Operator | Nov 2019 |
| 3922 | Shaw George R | | Oil & Gas Operator | Mar 1992 |
| 3923 | Shaw Robert Lesl | | Oil Operator | Oct 1989 |
| 3924 | Shaw, George R. (Deceased) | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 3925 | Shawmar Oil & Gas Co., Inc. | Sunnyvale, TX 75182 | Oil & Gas Operator | Dec 2023 |
| 3926 | Shawmar Oil Comp | | Oil & Gas Operator | Feb 1995 |
| 3927 | Shawnee Investment Company, Inc. | Council Grove, KS 66846 | Oil Operator | Apr 2002 |
| 3928 | Shearhart, Gary L. | Havana, KS 67347 | Oil Operator | Oct 2001 |
| 3929 | Sheedy Energy Production Company | | Oil Operator | Jan 2025 |
| 3930 | Sheel Oil Compan | | Oil Operator | Jan 1985 |
| 3931 | Sheffler Industries | Phoenix, AZ 85013 | Oil Operator | Aug 1999 |
| 3932 | Shelby Resources LLC | Denver, CO 80207 | Oil & Gas Operator | Mar 2025 |
| 3933 | Sheldon Brothers Agency | Salina, KS 67402 | Oil Operator | May 1998 |
| 3934 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 3935 | Shelley, Randall D. | Wichita, KS 67202 | Oil Operator | Mar 2025 |
| 3936 | Shelton, Robert | Lacygne, KS 66040 | Oil Operator | Nov 2024 |
| 3937 | Shepler & Thomas | | Oil & Gas Operator | Oct 1992 |
| 3938 | Shepler & Thomas, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 3939 | Sher-Lon Corpora | | Oil Operator | Apr 1994 |
| 3940 | Sheri-Di Product | | Oil Operator | Apr 1994 |
| 3941 | Shields Oil Prod | | Oil & Gas Operator | Aug 1995 |
| 3942 | Shields Oil Producers Inc. | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 3943 | Sho-Bar Energy I | | Oil & Gas Operator | Jan 1991 |
| 3944 | Sho-Bar Energy, Inc. | Harper, KS 67058 | Oil & Gas Operator | Apr 2025 |
| 3945 | Shofner Oil Company | Chushing,, OK 74023 | Oil & Gas Operator | Feb 2003 |
| 3946 | Shoreline Energy Partners, LLC | Chandler, AZ 85249 | Oil Operator | May 2011 |
| 3947 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Apr 2025 |
| 3948 | Short W D Oil Co | | Oil Operator | Mar 1996 |
| 3949 | Shorts Production LLC | Havana, KS 67347 | Oil Operator | Mar 2025 |
| 3950 | Shouse, Micheal C. | Liberty, MO 64068 | Oil & Gas Operator | Jan 1996 |
| 3951 | Shultz, Melvin W. | Parsons, KS 67357 | Oil Operator | Nov 1995 |
| 3952 | Sidwell Oil & Ga | | Oil & Gas Operator | May 1993 |
| 3953 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 3954 | Sieg Energy, Inc. | Ottawa, KS 66067 | Oil Operator | Nov 2024 |
| 3955 | Siegfried R H In | | Oil Operator | Apr 1985 |
| 3956 | Siemsen Operating, LLC | Holyrood, KS 67450 | Oil Operator | Feb 2025 |
| 3957 | Sierra Drilling | | Oil Operator | Sep 1988 |
| 3958 | Sierra Madre LLC | Greensburg, KS 67054 | Oil & Gas Operator | May 2015 |
| 3959 | Sierra Petroleum | | Oil & Gas Operator | Sep 1986 |
| 3960 | Silhan, Terry | Marion, KS 66861 | Oil & Gas Operator | Dec 2009 |
| 3961 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 3962 | Silver Creek Oil & Gas, Inc. | Wichita, KS 67203 | Oil Operator | Dec 1997 |
| 3963 | Simasko Producti | | Oil Operator | Dec 1986 |
| 3964 | Simco Petroleum | Cheyenne, WY 82003 | Oil & Gas Operator | Oct 2009 |
| 3965 | Simminger, Robert John Jr | | Oil Operator | Mar 2025 |
| 3966 | Simmons Oil Corporation | | Oil Operator | Jan 1989 |
| 3967 | Simmons Robert Z | | Oil Operator | Dec 1990 |
| 3968 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Jul 2025 |
| 3969 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 3970 | Siroky Oil Management | Pratt, KS 67124 | Oil & Gas Operator | Mar 2025 |
| 3971 | Six-D Exploration, LLC | Hutchinson, KS 67502 | Oil Operator | Aug 2024 |
| 3972 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 3973 | SKKM Oil Company | | Oil Operator | Dec 1992 |
| 3974 | Sky Oil, L.L.C. | St. Paul, KS 66771 | Oil Operator | Dec 2004 |
| 3975 | Slawson Explorat | | Oil & Gas Operator | Dec 1996 |
| 3976 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 3977 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 3978 | SLMW Energy Comp | | Oil Operator | Jan 1989 |
| 3979 | Slo Oil, LLC | El Dorado, KS 67042 | Oil Operator | Nov 2024 |
| 3980 | Sloan Operations | | Oil Operator | Mar 2025 |
| 3981 | SM Oil & Gas Inc | Skiatook, OK 74070 | Oil & Gas Operator | Apr 2025 |
| 3982 | Smith Oil & Gas LLC | Livermore, CO 80536 | Gas Operator | Mar 2025 |
| 3983 | Smith Oil Compan | | Oil Operator | Sep 1994 |
| 3984 | Smith Oil Company | Smackover, AR 71762 | Oil Operator | Dec 2024 |
| 3985 | Smith Oil Operations | | Oil & Gas Operator | Mar 2025 |
| 3986 | Smith Ranch Company | Sharon Springs, KS 67758 | Gas Operator | May 2002 |
| 3987 | Smith Richard F | | Oil Operator | Jun 1995 |
| 3988 | Smith Todd W Oil | | Oil Operator | Jan 1994 |
| 3989 | Smith, Darrin R | Wilson, KS 67490 | Oil Operator | Feb 2025 |
| 3990 | Smith, David | Wichita Falls, TX 76310 | Oil Operator | Jul 2025 |
| 3991 | Smith, Edward J. | Clifton, NJ 07013 | Oil & Gas Operator | Dec 1995 |
| 3992 | Smith, Gordon R. | Madison, KS 66860 | Oil Operator | Nov 1998 |
| 3993 | Smith, Loren L. | Oswego, KS 67356 | Oil & Gas Operator | Sep 2009 |
| 3994 | Smitherman, Leon C., Jr. | Andover, KS 67002 | Oil Operator | Mar 2025 |
| 3995 | Smokey Valley Resources | Lyons, KS 67554 | Oil Operator | Jun 1998 |
| 3996 | Smokey Valley Resources, Inc. | Geneseo, KS 67444 | Oil Operator | Nov 2008 |
| 3997 | Smoky Valley Res | | Oil & Gas Operator | Dec 1995 |
| 3998 | Snedco, Inc. | Chickasha, OK 73023 | Oil Operator | Mar 2025 |
| 3999 | Snow Oil Company | Nocona, TX 76255 | Oil Operator | Jul 2025 |
| 4000 | SNR Kansas Operating, LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 2019 |