| 4001 | Schierling Eldon | | Oil & Gas Operator | Aug 1986 |
| 4002 | Schierling, Eldon J. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 4003 | Schindler Oil | | Oil Operator | Dec 2009 |
| 4004 | Schindler Oil, LLC | Madison, KS 66860 | Oil Operator | Sep 2025 |
| 4005 | Schindler, Joe | Madison, KS 66860 | Oil Operator | Jun 2025 |
| 4006 | Schippers Oilfield Services, LLC | Hoxie, KS 67740 | Oil Operator | Jun 2025 |
| 4007 | Schlobohm Starr | | Oil Operator | Dec 1996 |
| 4008 | Schlobohm, Starr F. | Wolfeboro, NH 03894 | Oil Operator | Jul 2004 |
| 4009 | Schlotterbeck Ir | | Oil Operator | Nov 1990 |
| 4010 | Schmeid Ranch, LLC | Hays, KS 67601 | Oil Operator | Jun 2024 |
| 4011 | Schmidt Construction Services LLC | | Oil Operator | Aug 2025 |
| 4012 | Schmidt Kermit O | | Oil & Gas Operator | Sep 1995 |
| 4013 | Schmidt, Kermit | | Oil & Gas Operator | Dec 2009 |
| 4014 | Schmidt, Norman D. | Galva, KS 67443 | Gas Operator | Oct 1997 |
| 4015 | Schmidt, Terry D. | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 4016 | Schmidt, Tracy | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 4017 | Schmitt Carmen I | | Oil Operator | Dec 1996 |
| 4018 | Schneider Oil Co | | Oil Operator | Oct 1988 |
| 4019 | Schneltz Oil Com | | Oil Operator | May 1992 |
| 4020 | School Creek Corporation | Winfield, KS 67156 | Oil Operator | Jan 2000 |
| 4021 | Schrag Herman | | Oil & Gas Operator | Oct 1990 |
| 4022 | Schrag Oil Co | | Oil & Gas Operator | Jun 2004 |
| 4023 | Schreiber Oil Co. | | Oil Operator | Dec 2009 |
| 4024 | Schuetz, Edna, Ed & Ronald(Deceased) | Coffeyville, KS 67337 | Oil Operator | Nov 2011 |
| 4025 | Schulein Company LLC | Denver, CO 80246 | Oil & Gas Operator | Aug 2025 |
| 4026 | Schulein Robert | | Oil & Gas Operator | Dec 1995 |
| 4027 | Schulte Oil | Garnett, KS 66032 | Oil Operator | Mar 2022 |
| 4028 | Schulte Oil - C | | Oil Operator | Dec 1989 |
| 4029 | Schulz Oil & Gas, Inc. | Canton, KS 67428 | Oil & Gas Operator | Dec 2024 |
| 4030 | Schulz Roger A | | Oil & Gas Operator | Dec 1996 |
| 4031 | Schwertfeger, Donald E. Oil | Preston, KS 67569 | Oil Operator | Jan 1999 |
| 4032 | Schwien Tank & Lease Service Inc | Bazine, KS 67516 | Oil Operator | May 2000 |
| 4033 | Scimitar Resc Li | | Oil Operator | Oct 1982 |
| 4034 | Scott Services LLC | Plainville, KS 67663 | Oil Operator | Sep 2025 |
| 4035 | Scott'S Production, LLC | Roxbury, KS 67476 | Oil Operator | Sep 2025 |
| 4036 | Scott'S Well Service Inc | Roxbury, KS 67476 | Oil Operator | Nov 2012 |
| 4037 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 4038 | SCZ Resources, LLC | Houston, TX 77055 | Oil Operator | Sep 2025 |
| 4039 | Sdoco, LLC | Highlands Ranch, CO 80129 | Oil Operator | Oct 2025 |
| 4040 | Seagull Operatin | | Oil & Gas Operator | Jul 1995 |
| 4041 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 4042 | Secure Exploration And Production, LLC | | Oil Operator | Aug 2025 |
| 4043 | Sedona Oil & Gas Corporation | Dallas, TX 75231 | Oil & Gas Operator | Feb 2026 |
| 4044 | See Oil | | Oil Operator | Sep 2025 |
| 4045 | Seed Group/Aa Drilling | | Oil Operator | Oct 2009 |
| 4046 | Seeker, LLC | Newkirk, OK 74647 | Oil & Gas Operator | Nov 2019 |
| 4047 | Seelig Oil Corpo | | Oil Operator | Apr 1985 |
| 4048 | Seewald, Hughes | Amarillo, TX 79105 | Gas Operator | Jan 1997 |
| 4049 | Seibert Oil, LLC | Macksville, KS 67557 | Oil & Gas Operator | Jul 2025 |
| 4050 | Sek Energy, LLC | Benedict, KS 66714 | Oil & Gas Operator | Sep 2025 |
| 4051 | Sek Oil Incorpor | | Oil Operator | Jun 1985 |
| 4052 | Semgas Gathering LLC | Tulsa, OK 74136 | Gas Operator | Jul 2009 |
| 4053 | Seminole Senora Sand Unit #1, LLC | Rogers, AR 72758 | Gas Operator | Sep 2010 |
| 4054 | Sensor Oil & Gas, Inc. | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 4055 | Sentinel Petroleum Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2020 |
| 4056 | Serendipity Production Company LC | Guthrie, OK 73044 | Oil & Gas Operator | Apr 2020 |
| 4057 | Servco Productio | | Oil Operator | Dec 1992 |
| 4058 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 4059 | Ses Oil | | Oil Operator | Jun 2004 |
| 4060 | Seydell, E. Morris | Wichita Falls, TX 76307 | Oil Operator | Feb 1993 |
| 4061 | Seymour Oil Co Inc | Edmond, OK 73025 | Oil & Gas Operator | Jul 2011 |
| 4062 | SH Oil Operations LLC | Wichita, KS 67277 | Oil & Gas Operator | Sep 2025 |
| 4063 | Shade Tree Oil C | | Oil Operator | Oct 1987 |
| 4064 | Shaffer Oil Co., Inc. | Burlington, KS 66839 | Oil & Gas Operator | Jul 2001 |
| 4065 | Shaffer Oil Leas | | Oil Operator | May 1993 |
| 4066 | Shaida, John H. | Wichita, KS 67226 | Oil & Gas Operator | Feb 2026 |
| 4067 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Dec 2025 |
| 4068 | Sharon Resources | | Oil Operator | Sep 1995 |
| 4069 | Sharon Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 2010 |
| 4070 | Sharp Engineerin | | Oil Operator | Aug 1995 |
| 4071 | Sharp, Harry D. | Leawood, KS 66209 | Oil Operator | May 1997 |
| 4072 | Sharp, Robert L. &/Or Cindy | | Oil Operator | Nov 2019 |
| 4073 | Shaw George R | | Oil & Gas Operator | Mar 1992 |
| 4074 | Shaw Robert Lesl | | Oil Operator | Oct 1989 |
| 4075 | Shaw, George R. (Deceased) | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 4076 | Shawmar Oil & Gas | | Gas Operator | Nov 2018 |
| 4077 | Shawmar Oil & Gas Co., Inc. | Sunnyvale, TX 75182 | Oil & Gas Operator | Dec 2023 |
| 4078 | Shawmar Oil Comp | | Oil & Gas Operator | Feb 1995 |
| 4079 | Shawnee Investment Company, Inc. | Council Grove, KS 66846 | Oil Operator | Apr 2002 |
| 4080 | Shearhart, Gary L. | Havana, KS 67347 | Oil Operator | Oct 2001 |
| 4081 | Sheedy Energy Production Company | | Oil Operator | Sep 2025 |
| 4082 | Sheel Oil Compan | | Oil Operator | Jan 1985 |
| 4083 | Sheffler Industries | Phoenix, AZ 85013 | Oil Operator | Aug 1999 |
| 4084 | Shelby Resources LLC | Denver, CO 80207 | Oil & Gas Operator | Sep 2025 |
| 4085 | Sheldon Brothers Agency | Salina, KS 67402 | Oil Operator | May 1998 |
| 4086 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 4087 | Shelley, Randall D. | Wichita, KS 67202 | Oil Operator | Sep 2025 |
| 4088 | Shelton, Robert | Lacygne, KS 66040 | Oil Operator | Sep 2025 |
| 4089 | Shepler & Thomas | | Oil & Gas Operator | Oct 1992 |
| 4090 | Shepler & Thomas, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 4091 | Sher-Lon Corpora | | Oil Operator | Apr 1994 |
| 4092 | Sheri-Di Product | | Oil Operator | Apr 1994 |
| 4093 | Shields Oil Prod | | Oil & Gas Operator | Aug 1995 |
| 4094 | Shields Oil Producers Inc. | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 4095 | Sho-Bar Energy I | | Oil & Gas Operator | Jan 1991 |
| 4096 | Sho-Bar Energy Inc | Harper, KS 67058 | Oil & Gas Operator | Oct 2025 |
| 4097 | Shofner Oil Company | Chushing,, OK 74023 | Oil & Gas Operator | Feb 2003 |
| 4098 | Shoreline Energy Partners, LLC | Chandler, AZ 85249 | Oil Operator | May 2011 |
| 4099 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Nov 2025 |
| 4100 | Short W D Oil Co | | Oil Operator | Mar 1996 |