| 27001 | Stauffer Oil & G | | Oil Operator | Jun 1987 |
| 27002 | Stauros Operating Company | Edmond, OK 73083-2707 | Oil & Gas Operator | Mar 2001 |
| 27003 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 27004 | STD Steel | Latrobe, PA 15650-0071 | Oil & Gas Operator | Dec 2002 |
| 27005 | Steadfast Oil & Gas, LLC | Midland, TX 79707 | Oil & Gas Operator | Oct 2022 |
| 27006 | Stealth Energy Inc | Billings, MT 59101 | Oil Operator | Dec 2011 |
| 27007 | Stealth Energy USA Inc | Billings, MT 59104 | Oil Operator | Dec 2017 |
| 27008 | Stealth Onsite Solutions LLC | Pasadena, TX 77505 | Oil Operator | Apr 2024 |
| 27009 | Stealth, Inc. | Cross Plains, TX 76443 | Gas Operator | Mar 1997 |
| 27010 | Steamboat Oil And Gas LLC | Gillette, WY 82717 | Oil Operator | Mar 2024 |
| 27011 | Stearns | Crossroads, NM 88114 | Oil & Gas Operator | Jan 2024 |
| 27012 | Stearns Oil Company LLC | Willison, ND 58801 | Oil & Gas Operator | Feb 2024 |
| 27013 | Stearns Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 1993 |
| 27014 | Steaua Romana (Us) Inc. | | Oil & Gas Operator | Apr 1987 |
| 27015 | Stebell, Jean M. | Westfield, NY 14787 | Gas Operator | Dec 2022 |
| 27016 | Stebeth Gas Production, Inc. | Beaumont, KS 67012 | Oil Operator | May 1996 |
| 27017 | Steckel Oil, LLC | Russell, KS 67665 | Oil Operator | Dec 2023 |
| 27018 | Stecklein Oil Co | | Oil Operator | Jul 1993 |
| 27019 | Stecklein Oil Company, A General Partnership | Hays, KS 67601 | Oil Operator | Sep 2023 |
| 27020 | Stedman Energy Inc | Chautauqua, NY 14722 | Oil & Gas Operator | Dec 2023 |
| 27021 | Stedman Oil & Gas LLC | Hobart, OK 73651-1624 | Oil & Gas Operator | Mar 2015 |
| 27022 | Steele Jr Guy M Test Trust | Dallas, TX 75214-3756 | Gas Operator | Mar 2018 |
| 27023 | Steele VIctor Patterson | Wewoka, OK 74884-0560 | Oil & Gas Operator | Jan 2001 |
| 27024 | Steele, Mark E. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 27025 | Steffen Resource Development, LLC | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2023 |
| 27026 | Stehle Oil Company | | Oil Operator | Jun 2021 |
| 27027 | Steimle, Peter C. | Auburn, NY 13021 | Gas Operator | Dec 2022 |
| 27028 | Steinberger Bros., Inc. | Independence, KS 67301 | Oil Operator | Dec 2009 |
| 27029 | Steinberger Oil Company | Independence, KS 67301 | Oil & Gas Operator | May 2002 |
| 27030 | Steinberger, D. | Windthorst, TX 76389 | Oil & Gas Operator | Oct 1995 |
| 27031 | Steinberger, Gerald | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2007 |
| 27032 | Steindorf, Bert Oil & Gas Co. | Floresville, TX 78114 | Oil & Gas Operator | Apr 2024 |
| 27033 | Steiner Oil And Gas | Lincolnville, KS 66858 | Oil Operator | Jan 1999 |
| 27034 | Steinforth, Loren | Yates Center, KS 66783 | Oil Operator | Sep 2014 |
| 27035 | Steinle Oil | | Oil Operator | Aug 2021 |
| 27036 | Steinman, Frank C. | Electra, TX 76360 | Oil & Gas Operator | Apr 2024 |
| 27037 | Steinwachs SR, James M | Robards, KY 42452 | Oil Operator | Dec 2022 |
| 27038 | Stekoll Oil & Gas, LTD. | | Oil Operator | Jun 1963 |
| 27039 | Stekoll Petroleu | | Oil Operator | Oct 1985 |
| 27040 | Stelbar Oil Corp | Wichita, KS 67206 | Oil & Gas Operator | Aug 1995 |
| 27041 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2023 |
| 27042 | Stellar Oil Company | Arvada, CO 80006 | Oil & Gas Operator | Dec 1998 |
| 27043 | Steller Energy & Investment Corp | Plano, TX 75093 | Oil & Gas Operator | Feb 2021 |
| 27044 | Stellex | De Leon, TX 76444 | Oil & Gas Operator | Apr 2024 |
| 27045 | Stelucan Energy, LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2024 |
| 27046 | Stelzer Drilling Co. Inc. | Post, TX 79356 | Oil Operator | Apr 2024 |
| 27047 | Stelzer, E.A. Oil Company | Post, TX 79356 | Oil & Gas Operator | Feb 2002 |
| 27048 | Stelzer, J. C. | Post, TX 79356 | Oil & Gas Operator | Dec 1995 |
| 27049 | Stenco | | Oil & Gas Operator | Apr 1994 |
| 27050 | Stepco Incorpora | | Oil Operator | Nov 1994 |
| 27051 | Stepco Oil & Gas, LLC | Coyanosa, TX 79730 | Oil & Gas Operator | Apr 2024 |
| 27052 | Stepco Oil, Inc. | Ellinwood, KS 67526 | Oil Operator | Jan 2020 |
| 27053 | Stepco, Inc. | Ellinwood, KS 67526 | Oil Operator | Feb 2005 |
| 27054 | Stephen Debrular Dba Stephen Gas Company | Weston, WV 26452-7396 | Gas Operator | Dec 2021 |
| 27055 | Stephen L Satterfield Production Company | Grantsville, WV 26147-0757 | Oil & Gas Operator | Nov 2021 |
| 27056 | Stephen Michael Inc | Midwest City, OK 73130-5200 | Oil & Gas Operator | Oct 2015 |
| 27057 | Stephen W. Bradford | | Oil Operator | Dec 1996 |
| 27058 | Stephens & Johnson Op Co | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2024 |
| 27059 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 27060 | Stephens Energy Company LLC | | Oil & Gas Operator | Jun 2012 |
| 27061 | Stephens Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Feb 2022 |
| 27062 | Stephens Energy Group LLC | | Oil & Gas Operator | Jan 2024 |
| 27063 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Feb 2024 |
| 27064 | Stephens Oil Co. | | Oil Operator | Dec 2017 |
| 27065 | Stephens Oil Company, LLC | Stephens, AR 71764 | Oil Operator | Feb 2024 |
| 27066 | Stephens Operating Inc | Ardmore, OK 73401 | Oil & Gas Operator | Sep 2014 |
| 27067 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2024 |
| 27068 | Stephens Production Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2018 |
| 27069 | Stephens Williston, LLC Dba Seg Williston, LLC | | Oil & Gas Operator | Feb 2024 |
| 27070 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 27071 | Stephens, Clayton E. | Dallas, TX 75229 | Oil & Gas Operator | Nov 2011 |
| 27072 | Stephens, Glynn | Overton, TX 75684 | Oil & Gas Operator | Oct 2001 |
| 27073 | Stephens, Hayseed Oil Inc. | Weatherford, TX 76087 | Oil & Gas Operator | Mar 2008 |
| 27074 | Stephens, Mickie L. | MC Camey, TX 79752 | Oil & Gas Operator | Aug 1998 |
| 27075 | Stephens, Morris | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 27076 | Stephenson Group Natural Gas Co | Smicksburg, PA 16256-1710 | Gas Operator | Dec 2020 |
| 27077 | Stephenson John | | Oil Operator | Dec 1985 |
| 27078 | Stephenson L G & | | Oil Operator | Apr 1987 |
| 27079 | Stephenson Mark M | Smicksburg, PA 16256-1710 | Gas Operator | Dec 2009 |
| 27080 | Stephenson Oil & Gas, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Sep 1999 |
| 27081 | Stephenson W W Pet Corp | Edmond, OK 73003-0014 | Oil & Gas Operator | Jul 2017 |
| 27082 | Stephenson, Light | Whitsett, TX 78075 | Oil & Gas Operator | Nov 2000 |
| 27083 | Sterling Drillin | | Oil & Gas Operator | Mar 1992 |
| 27084 | Sterling Drilling Company | Pratt, KS 67124 | Oil & Gas Operator | Apr 2014 |
| 27085 | Sterling Energy Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 1995 |
| 27086 | Sterling Energy Resources, Inc. | Overland Park, KS 66212 | Oil Operator | May 2019 |
| 27087 | Sterling Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2015 |
| 27088 | Sterling Engine Service, Inc. | Alice, TX 78333 | Oil & Gas Operator | Apr 2024 |
| 27089 | Sterling Expl. & Prod. Co., LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 27090 | Sterling Explora | | Oil & Gas Operator | Jun 1994 |
| 27091 | Sterling Exploration | Lee'S Summit, MO 64082 | Gas Operator | Nov 1997 |
| 27092 | Sterling Inv. Group & Assc., Inc | Baytown, TX 77522 | Oil & Gas Operator | Apr 2024 |
| 27093 | Sterling Oil & G | | Oil Operator | May 1984 |
| 27094 | Sterling Oil And Gas | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2024 |
| 27095 | Sterling Oil Co. | Sterling, KS 67579 | Oil Operator | Feb 2000 |
| 27096 | Sterling Oil Of Okla Inc | Tulsa, OK 74170-2163 | Oil & Gas Operator | Nov 2006 |
| 27097 | Sterling Operators Inc | | Oil Operator | Feb 2024 |
| 27098 | Sterling Petrole | | Oil & Gas Operator | Sep 1992 |
| 27099 | Sterling Properties Inc | Lawton, OK 73501-9601 | Oil Operator | Feb 2024 |
| 27100 | Sterlynn Oil & Gas, Inc. | Harper, TX 78631 | Oil Operator | Apr 2024 |