| 3901 | Sheldon Brothers Agency | Salina, KS 67402 | Oil Operator | May 1998 |
| 3902 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 3903 | Shelley, Randall D. | Wichita, KS 67202 | Oil Operator | Mar 2026 |
| 3904 | Shelton, Robert | Lacygne, KS 66040 | Oil Operator | Mar 2026 |
| 3905 | Shepler & Thomas | | Oil & Gas Operator | Oct 1992 |
| 3906 | Shepler & Thomas, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Apr 2026 |
| 3907 | Sher-Lon Corpora | | Oil Operator | Apr 1994 |
| 3908 | Sheri-Di Product | | Oil Operator | Apr 1994 |
| 3909 | Shields Oil Prod | | Oil & Gas Operator | Aug 1995 |
| 3910 | Shields Oil Producers Inc. | Russell, KS 67665 | Oil Operator | Apr 2026 |
| 3911 | Sho-Bar Energy I | | Oil & Gas Operator | Jan 1991 |
| 3912 | Sho-Bar Energy Inc | Harper, KS 67058 | Oil & Gas Operator | Apr 2026 |
| 3913 | Shoreline Energy Partners, LLC | Chandler, AZ 85249 | Oil Operator | May 2011 |
| 3914 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | May 2026 |
| 3915 | Short W D Oil Co | | Oil Operator | Mar 1996 |
| 3916 | Shorts Production LLC | Havana, KS 67347 | Oil Operator | Mar 2026 |
| 3917 | Shouse, Micheal C. | Liberty, MO 64068 | Oil & Gas Operator | Jan 1996 |
| 3918 | Shultz, Melvin W. | Parsons, KS 67357 | Oil Operator | Nov 1995 |
| 3919 | Sidwell Oil & Ga | | Oil & Gas Operator | May 1993 |
| 3920 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 3921 | Sieg Energy, Inc. | Ottawa, KS 66067 | Oil Operator | Nov 2025 |
| 3922 | Siegfried R H In | | Oil Operator | Apr 1985 |
| 3923 | Siemsen Operating, LLC | Holyrood, KS 67450 | Oil Operator | Mar 2026 |
| 3924 | Sierra Drilling | | Oil Operator | Sep 1988 |
| 3925 | Sierra Madre LLC | Greensburg, KS 67054 | Oil & Gas Operator | May 2015 |
| 3926 | Sierra Petroleum | | Oil & Gas Operator | Sep 1986 |
| 3927 | Silhan, Terry | Marion, KS 66861 | Oil & Gas Operator | Dec 2009 |
| 3928 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 3929 | Silver Creek Oil & Gas, Inc. | Wichita, KS 67203 | Oil Operator | Dec 1997 |
| 3930 | Simasko Producti | | Oil Operator | Dec 1986 |
| 3931 | Simco Petroleum | Cheyenne, WY 82003 | Oil & Gas Operator | Oct 2009 |
| 3932 | Simminger, Robert John Jr | | Oil Operator | Dec 2025 |
| 3933 | Simmons Oil Corp | | Oil Operator | Jan 1989 |
| 3934 | Simmons Robert Z | | Oil Operator | Dec 1990 |
| 3935 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Sep 2026 |
| 3936 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 3937 | Siroky Oil Management | Pratt, KS 67124 | Oil & Gas Operator | Apr 2026 |
| 3938 | Six-D Exploration, LLC | Hutchinson, KS 67502 | Oil Operator | Apr 2025 |
| 3939 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 3940 | SKKM Oil Company | | Oil Operator | Dec 1992 |
| 3941 | Sky Oil, L.L.C. | St. Paul, KS 66771 | Oil Operator | Dec 2004 |
| 3942 | Slawson Donald C | Wichita, KS 67202 | Oil & Gas Operator | Apr 2026 |
| 3943 | Slawson Explorat | | Oil & Gas Operator | Dec 1996 |
| 3944 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 3945 | SLMW Energy Comp | | Oil Operator | Jan 1989 |
| 3946 | Slo Oil, LLC | El Dorado, KS 67042 | Oil Operator | Dec 2025 |
| 3947 | Sloan Operations | | Oil Operator | Feb 2026 |
| 3948 | SM Oil & Gas Inc | Skiatook, OK 74070 | Oil & Gas Operator | May 2026 |
| 3949 | SMG Resources LLC | | Oil & Gas Operator | Apr 2026 |
| 3950 | Smith Oil & Gas LLC | Livermore, CO 80536 | Gas Operator | Apr 2026 |
| 3951 | Smith Oil Co. | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 3952 | Smith Oil Compan | | Oil Operator | Sep 1994 |
| 3953 | Smith Oil Operations | | Oil & Gas Operator | Apr 2026 |
| 3954 | Smith Ranch Company | Sharon Springs, KS 67758 | Gas Operator | May 2002 |
| 3955 | Smith Richard F | | Oil Operator | Jun 1995 |
| 3956 | Smith Todd W Oil | | Oil Operator | Jan 1994 |
| 3957 | Smith, Darrin R | Wilson, KS 67490 | Oil Operator | Jan 2026 |
| 3958 | Smith, David | Wichita Falls, TX 76310 | Oil Operator | Sep 2026 |
| 3959 | Smith, Edward J. | Clifton, NJ 07013 | Oil & Gas Operator | Dec 1995 |
| 3960 | Smith, Gordon R. | Madison, KS 66860 | Oil Operator | Nov 1998 |
| 3961 | Smith, Loren L. | Oswego, KS 67356 | Oil & Gas Operator | Sep 2009 |
| 3962 | Smitherman, Leon C., Jr. | Andover, KS 67002 | Oil Operator | Dec 2019 |
| 3963 | Smokey Valley Resources | Lyons, KS 67554 | Oil Operator | Jun 1998 |
| 3964 | Smokey Valley Resources, Inc. | Geneseo, KS 67444 | Oil Operator | Nov 2008 |
| 3965 | Smoky Valley Res | | Oil & Gas Operator | Dec 1995 |
| 3966 | Snedco, Inc. | Chickasha, OK 73023 | Oil Operator | Apr 2026 |
| 3967 | Snow Oil Company | Nocona, TX 76255 | Oil Operator | Sep 2026 |
| 3968 | SNR Kansas Operating, LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 2019 |
| 3969 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Sep 2026 |
| 3970 | Snyder K E Compa | | Oil Operator | Jul 1987 |
| 3971 | Snyder Partners, General Partnership | Cody, WY 82414 | Oil & Gas Operator | Jul 2019 |
| 3972 | Snyder, Jim Estate (Deceased) | Hamilton, KS 66853 | Oil Operator | Dec 2009 |
| 3973 | Snyder, K. Lance | Hamilton, KS 66853 | Oil Operator | Nov 2004 |
| 3974 | So & Jo, LLC | Kansas City, MO 64158 | Oil Operator | Dec 2021 |
| 3975 | So-I , A General Partnership | Kansas City, MO 64106 | Oil & Gas Operator | Jun 2025 |
| 3976 | Sokan Operating, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2026 |
| 3977 | Soles Larry - Fe | | Oil Operator | Nov 1986 |
| 3978 | Somerset Energy | | Oil Operator | Feb 1986 |
| 3979 | Somerset Energy, Inc. | Louisburg, KS 66053 | Oil Operator | Dec 2023 |
| 3980 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 3981 | Sonoma Resources LLC | Andover, KS 67002 | Oil & Gas Operator | Apr 2026 |
| 3982 | Sorensen, Kim A. | Abbyville, KS 67510 | Oil Operator | Mar 2026 |
| 3983 | Sotta, Donald E. | McCune, KS 66753 | Oil Operator | Nov 2025 |
| 3984 | Soule, Gilbert A. | Madison, KS 66860 | Oil Operator | Jan 2002 |
| 3985 | Soule, Richard A. | Eureka, KS 67045 | Oil Operator | Sep 2019 |
| 3986 | Source Energy Midcon LLC | Highlands Ranch, CO 80129 | Oil Operator | Jul 2015 |
| 3987 | Source Petroleum | Wichita, KS 67202 | Oil & Gas Operator | Oct 1993 |
| 3988 | South Bay Oil Corporation | Wichita, KS 67202 | Oil Operator | Dec 2019 |
| 3989 | South Central Oil And Gas | | Oil & Gas Operator | Feb 2014 |
| 3990 | South Forty Inc (The) | Laverne, OK 73848 | Oil & Gas Operator | Mar 2015 |
| 3991 | South Of Briles | | Oil Operator | Aug 1989 |
| 3992 | South Ranch Oil | | Gas Operator | Dec 1990 |
| 3993 | Southern Gas Inc | | Gas Operator | Jan 1987 |
| 3994 | Southern Hills Gas Co. | | Oil Operator | Mar 2026 |
| 3995 | Southern Sky Energy, LLC | | Oil Operator | Apr 2026 |
| 3996 | Southern Star Central Gas Pipeline Inc | Owensboro, KY 42301 | Oil & Gas Operator | Mar 2026 |
| 3997 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 3998 | Southland Royalt | | Oil & Gas Operator | Nov 1993 |
| 3999 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 4000 | Southwest Gas St | | Oil & Gas Operator | Dec 1981 |