| 28101 | Stroud Energy, LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2006 |
| 28102 | Stroud Oil Properties, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2013 |
| 28103 | Stroud Operating LLC | | Oil & Gas Operator | Dec 2012 |
| 28104 | Stroud Petroleum Company | Oklahoma City, OK 73156-0156 | Oil Operator | Jun 2014 |
| 28105 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Jul 2025 |
| 28106 | Stroud Production LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 28107 | Struck Rock Oil And Gas LLC | Geary, OK 73040 | Oil & Gas Operator | Apr 2025 |
| 28108 | Struthers Oil & Gas Corp | Tulsa, OK 74133 | Oil & Gas Operator | Jan 2013 |
| 28109 | Struthoff Energy, L.L.C. | San Antonio, TX 78216 | Oil Operator | Jul 2025 |
| 28110 | Stryker Energy Corp. | Mesquite, TX 75180 | Oil & Gas Operator | Jul 2025 |
| 28111 | Stryker Energy LLC | Mayfield VIllag, OH 44143 | Oil & Gas Operator | Dec 2018 |
| 28112 | STS Petroleum LLC | Houston, TX 77289 | Oil & Gas Operator | Jul 2025 |
| 28113 | Stuart & Barrett | San Angelo, TX 76904 | Gas Operator | Jan 2008 |
| 28114 | Stuart Oil | | Oil Operator | Jan 2025 |
| 28115 | Stuart Oil & Gas | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 28116 | Stuart Operating, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jul 2025 |
| 28117 | Stubblefield Energy Company | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 28118 | Stubbs & Fleming, A General Partnership | Wichita, KS 67202 | Oil Operator | Jul 2005 |
| 28119 | Stubbs Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Aug 1998 |
| 28120 | Stubbs, J. W. | Suwanee, GA 30024 | Oil & Gas Operator | Mar 2008 |
| 28121 | Stuber, VIrgil | Eureka, KS 67045 | Oil Operator | Dec 2019 |
| 28122 | Stucky Oil Compa | | Oil Operator | Mar 1988 |
| 28123 | Stucky Oil Company | Sedgwick, KS 67135 | Gas Operator | Aug 1999 |
| 28124 | Stucky, Edward P. | Sabetha, KS 66534 | Oil Operator | May 1992 |
| 28125 | Stucky, Kenneth R. Oil & Gas Operations | Burrton, KS 67020 | Oil & Gas Operator | Aug 2002 |
| 28126 | Studer Oil Co. | Pratt, KS 67124 | Oil Operator | Oct 2019 |
| 28127 | Studer Oil Compa | | Oil & Gas Operator | Feb 1993 |
| 28128 | Studley Resources Corporation | Humble, TX 77347 | Oil & Gas Operator | Dec 1996 |
| 28129 | Studley, Richard | Gowanda, NY 14070 | Gas Operator | Dec 2024 |
| 28130 | Studley, Robert SR. & Robert Jr. | Gowanda, NY 14070 | Gas Operator | Dec 2024 |
| 28131 | Stull Crude Co, LLC | | Oil Operator | Mar 2025 |
| 28132 | Stull Oil LLC | Natoma, KS 67651 | Oil Operator | Mar 2025 |
| 28133 | Stults, Joe K. | Archer City, TX 76351 | Oil & Gas Operator | Mar 2007 |
| 28134 | Stumpff Paul | Bartlesville, OK 74006-3426 | Oil & Gas Operator | Mar 2015 |
| 28135 | Sturgeon Point Development Co | | Gas Operator | Jun 2019 |
| 28136 | Sturman Jay R | Mounds, OK 74047 | Oil & Gas Operator | Apr 2024 |
| 28137 | Stuteville Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2004 |
| 28138 | Stuteville, Jack | Olney, TX 76374 | Oil Operator | Jul 2025 |
| 28139 | Stydahar Oil & Gas Co. | | Oil & Gas Operator | Dec 2021 |
| 28140 | STZ Petroleum Inc. | Houston, TX 77268 | Oil & Gas Operator | Dec 1997 |
| 28141 | Sub Surface Operations | Brownwood, TX 76804 | Oil & Gas Operator | Jul 2025 |
| 28142 | Sublette Feeders LLC | Sublette, KS 67877 | Gas Operator | Mar 2025 |
| 28143 | Suborp Energy, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Sep 2000 |
| 28144 | Subsea Operating Co. | Albany, TX 76430 | Oil & Gas Operator | Jul 2025 |
| 28145 | Subsurface Energy Corp. | Coleman, TX 76834 | Oil & Gas Operator | Jul 2025 |
| 28146 | Subsurface Energy, Inc. | | Oil & Gas Operator | Oct 2015 |
| 28147 | Subsurface Exploration | Coleman, TX 76834 | Oil & Gas Operator | Apr 2006 |
| 28148 | Subsurface Minerals Group LLC | Tulsa, OK 74119-1635 | Oil & Gas Operator | Jan 2013 |
| 28149 | Subsurface Production, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Jul 2025 |
| 28150 | Subsurface Resources Inc | Logan, UT 84321 | Oil & Gas Operator | Aug 1990 |
| 28151 | Subterranean Energy, LLC | Tyler, TX 75705 | Oil & Gas Operator | Jul 2025 |
| 28152 | Suburban Propane Expl Co, Inc. | | Oil & Gas Operator | Jun 1983 |
| 28153 | Suburban Propane Gas Corp. | | Oil & Gas Operator | Sep 1980 |
| 28154 | Success Oil Company, Inc. | Beverly Hills, CA 90211 | Oil & Gas Operator | Jul 2025 |
| 28155 | Sudberry Mark E Dba Gushing Oil Co | Trophy Club, TX 76262-5531 | Oil Operator | Jan 2020 |
| 28156 | Sue-Ann Operating, L.C. | Victoria, TX 77903 | Oil & Gas Operator | Jul 2025 |
| 28157 | Sue-Ann Production Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 28158 | Suemaur Expl. & Prod., LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 28159 | Suemaur Exploration, Inc. | Corpus Chrsti, TX 78470 | Oil & Gas Operator | Mar 2008 |
| 28160 | Suemaur Operating LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 28161 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Mar 2025 |
| 28162 | Suerte Oil Compa | | Oil & Gas Operator | Oct 1995 |
| 28163 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 28164 | Sugar Bowl Gas Corp. | | Oil Operator | Dec 1983 |
| 28165 | Sugar Bowl Industrial Gas Corp | | Oil Operator | Dec 1983 |
| 28166 | Sugar Creek Environmental, LLC | | Oil Operator | Jan 2025 |
| 28167 | Sugar Creek Producing Company | | Oil & Gas Operator | Dec 2010 |
| 28168 | Sugar Creek Producing Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 28169 | Sugar Enterprises, LLC | Tyler, TX 75713 | Oil & Gas Operator | Jul 2025 |
| 28170 | Sugar Oil Company | | Oil & Gas Operator | Feb 2011 |
| 28171 | Sugar Rock Incorporated | | Oil & Gas Operator | Dec 2021 |
| 28172 | Suits & Jeans, LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 28173 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 28174 | Sukay Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2003 |
| 28175 | Sullivan & Clark | Youngsville, PA 16371-0194 | Oil & Gas Operator | Dec 1998 |
| 28176 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 28177 | Sullivan - Wells | Amarillo, TX 79101 | Gas Operator | Jul 2025 |
| 28178 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2025 |
| 28179 | Sullivan Jesse G | Duncan, OK 73533 | Oil Operator | May 1998 |
| 28180 | Sullivan Nora M | Oklahoma City, OK 73139 | Oil Operator | Jan 1997 |
| 28181 | Sullivan Well Service | | Oil Operator | Mar 2010 |
| 28182 | Sullivan Wesley L | Duncan, OK 73533 | Oil & Gas Operator | Mar 2002 |
| 28183 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 28184 | Sullivant G W | Oklahoma City, OK 73172-1135 | Oil & Gas Operator | Aug 2001 |
| 28185 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Jul 2025 |
| 28186 | Sultex Oil & Gas Inc | Houston, TX 77059-3126 | Oil & Gas Operator | Aug 2002 |
| 28187 | Summa Engineering Inc | Oklahoma City, OK 73112-3624 | Oil & Gas Operator | Mar 2015 |
| 28188 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 28189 | Summers Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2002 |
| 28190 | Summers Petroleum Inc | | Oil & Gas Operator | Dec 2002 |
| 28191 | Summers, Esther B. | Midland, MI 48640 | Gas Operator | Dec 2024 |
| 28192 | Summit Appalachia Operating Company, LLC | | Gas Operator | Dec 2021 |
| 28193 | Summit Discovery Res II LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2019 |
| 28194 | Summit Energy Company | | Oil & Gas Operator | Mar 2009 |
| 28195 | Summit Energy LLC | | Oil & Gas Operator | Apr 2025 |
| 28196 | Summit Energy, Inc. | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 28197 | Summit Essexville Inc | | Oil Operator | Dec 2014 |
| 28198 | Summit Exploration (California) LLC | | Oil & Gas Operator | Feb 2018 |
| 28199 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 28200 | Summit Gas LLC | | Oil & Gas Operator | Oct 2011 |