| 27101 | Shultz, Melvin W. | Parsons, KS 67357 | Oil Operator | Nov 1995 |
| 27102 | Shultz, Todd W. | Limestone, NY 14753 | Oil & Gas Operator | Dec 2024 |
| 27103 | Shumate, Jess | Brookesmith, TX 76827 | Oil Operator | Jun 2006 |
| 27104 | Shuping, Dona J. | Hamlin, TX 79520 | Gas Operator | Dec 2011 |
| 27105 | Shuteston Oil & Gas | | Oil & Gas Operator | Sep 1997 |
| 27106 | SHWJ Oil & Gas Co., Inc. | Oil City, LA 71061 | Oil Operator | Dec 2025 |
| 27107 | Siana Oil & Gas | Conroe, TX 77305 | Oil & Gas Operator | Dec 2025 |
| 27108 | Siana Oil & Gas., L.L.C | | Oil & Gas Operator | Dec 2021 |
| 27109 | Siana Operating LLC | Conroe, TX 77305224 | Oil & Gas Operator | May 2017 |
| 27110 | Sicko Jaquetta Len | Muldoon, TX 78949 | Oil Operator | Sep 2025 |
| 27111 | Sideline Oil & Gas, L.P. | Friendswood, TX 77549 | Oil Operator | Dec 2025 |
| 27112 | Sidney E. Pinkston, Jr, Trustee | | Oil & Gas Operator | Apr 1980 |
| 27113 | Sidney Lanier | Midland, TX BADADDR | Oil & Gas Operator | Jan 1996 |
| 27114 | Sidwell Oil & Ga | | Oil & Gas Operator | May 1993 |
| 27115 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 27116 | Sidwell Operating Company, L.P. | Amarillo, TX 79105 | Oil & Gas Operator | Dec 2025 |
| 27117 | Sidwell Theodore R Jr | Thornville, OH 43076 | Oil & Gas Operator | Dec 1988 |
| 27118 | Sieg Energy, Inc. | Ottawa, KS 66067 | Oil Operator | May 2025 |
| 27119 | Siegfried R H In | | Oil Operator | Apr 1985 |
| 27120 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 27121 | Siempre Energy Operating, LLC | Houston, TX 77094 | Oil Operator | Dec 2025 |
| 27122 | Siemsen Operating, LLC | Holyrood, KS 67450 | Oil Operator | Jun 2025 |
| 27123 | Sien Operating Company, LLC | San Antonio, TX 78209 | Oil Operator | May 2023 |
| 27124 | Sierra Blanca Operating Company | Cleburne, TX BADADDR | Oil & Gas Operator | May 1999 |
| 27125 | Sierra Drilling | | Oil Operator | Sep 1988 |
| 27126 | Sierra Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2008 |
| 27127 | Sierra Group, L.L.C. | San Angelo, TX 76904 | Oil & Gas Operator | Jan 2025 |
| 27128 | Sierra Industries, Inc. | | Oil & Gas Operator | Apr 1989 |
| 27129 | Sierra Lima Oil & Gas, LLC | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 27130 | Sierra Madre LLC | Greensburg, KS 67054 | Oil & Gas Operator | May 2015 |
| 27131 | Sierra Madre Natural Res., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 27132 | Sierra Madre Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 27133 | Sierra Minerals, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Dec 2025 |
| 27134 | Sierra Oil Company | Fort Worth, TX 76106 | Oil & Gas Operator | Dec 2025 |
| 27135 | Sierra Petroleum | | Oil & Gas Operator | Sep 1986 |
| 27136 | Sierra Production Company | | Oil & Gas Operator | May 1986 |
| 27137 | Sierra Reserve Company | | Oil Operator | Dec 1985 |
| 27138 | Sierra Resources, Inc. | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2025 |
| 27139 | Sierra Resources, LLC | Houston, TX 77219 | Oil & Gas Operator | Aug 2021 |
| 27140 | Sierra Trading Corporation | | Oil & Gas Operator | Sep 1978 |
| 27141 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 27142 | Sigma Corporation | Charleston, WV 25301-2644 | Gas Operator | Dec 2021 |
| 27143 | Sigma Energy & Explor., Co LLC | Ozona, TX 76943 | Oil & Gas Operator | Feb 2010 |
| 27144 | Sigma Energy, LLC | | Oil Operator | Jan 2025 |
| 27145 | Sigma Exploration Corp., The | Dallas, TX 75230 | Oil & Gas Operator | Sep 1998 |
| 27146 | Sigma Oper & Develop Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 27147 | Sigmon Construction Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 27148 | Sigmon Production Company, Inc. | Longview, TX 75608 | Oil & Gas Operator | Dec 2013 |
| 27149 | Signal Hill Company LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2024 |
| 27150 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 27151 | Signal Hill Operating LLC | | Oil & Gas Operator | Oct 2025 |
| 27152 | Signal Hill Petroleum Inc. | | Oil & Gas Operator | Nov 2025 |
| 27153 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Dec 2025 |
| 27154 | Signal Oil Company, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 27155 | Signal Operating L.L.C. | | Oil Operator | Jan 2025 |
| 27156 | Signal Petroleum | | Oil & Gas Operator | Jul 1980 |
| 27157 | Signal, LLC | | Oil & Gas Operator | Oct 2025 |
| 27158 | Signal, LLC Of Mississippi | | Oil & Gas Operator | Dec 2024 |
| 27159 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 27160 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 27161 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 27162 | Sikes, Arlas M. | Brownwood, TX 76801 | Oil & Gas Operator | May 2000 |
| 27163 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 27164 | Silent Stone Energy LLC | | Oil & Gas Operator | Sep 2025 |
| 27165 | Silhan, Terry | Marion, KS 66861 | Oil & Gas Operator | Dec 2009 |
| 27166 | Silleman, Drew C. | Cattaraugus, NY 14719 | Gas Operator | Dec 2024 |
| 27167 | Siltstone Resources Op II, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Dec 2025 |
| 27168 | Silvco Energy, LLC | | Oil Operator | Apr 2014 |
| 27169 | Silver Anchor Resources LLC | Azle, TX 76020 | Oil & Gas Operator | Dec 2025 |
| 27170 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 27171 | Silver Creek Oil & Gas, Inc. | Wichita, KS 67203 | Oil Operator | Dec 1997 |
| 27172 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Dec 2025 |
| 27173 | Silver Creek Permian Op Co, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2023 |
| 27174 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 27175 | Silver Cross Energy Partners LLC | Richmond, TX 77469 | Oil & Gas Operator | Dec 2025 |
| 27176 | Silver Eagle Oil Company | Ada, OK 74820 | Oil Operator | Dec 2004 |
| 27177 | Silver Exploration Company | | Oil & Gas Operator | Nov 2025 |
| 27178 | Silver Fox Oil & Gas LLC | McAllen, TX 78504 | Oil & Gas Operator | Dec 2025 |
| 27179 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 27180 | Silver Hill Energy Partners, LLC | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 27181 | Silver Mountain Energy LLC | | Gas Operator | Nov 2025 |
| 27182 | Silver Oak Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2016 |
| 27183 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 27184 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 27185 | Silver Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2025 |
| 27186 | Silver Petroleum Inc | | Gas Operator | Dec 2001 |
| 27187 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Sep 2025 |
| 27188 | Silver Rock Energy, LLC | Terrell, TX 75160 | Oil Operator | Dec 2025 |
| 27189 | Silver Spike Energy Oper, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2015 |
| 27190 | Silver Spike Energy Operating Of NM, LLC | Midland, TX 79701 | Oil Operator | Jul 2016 |
| 27191 | Silver Square Resources LLC | Cincinnati, OH 45219 | Oil Operator | Dec 2023 |
| 27192 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2025 |
| 27193 | Silver Star Operating Co., LLC | Nada, TX 77460 | Gas Operator | Dec 2025 |
| 27194 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Oct 2025 |
| 27195 | Silver Thread Oil & Gas, Inc. | | Oil & Gas Operator | Jul 2015 |
| 27196 | Silver Tusk Operating Co. LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2018 |
| 27197 | Silverado Oil Inc | Greeley, CO 80631 | Oil Operator | Apr 2000 |
| 27198 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 27199 | Silverback Operating II, LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2025 |
| 27200 | Silverback Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2016 |