| 28101 | Spring Tree Management LC | Abilene, TX 79604 | Oil Operator | May 2013 |
| 28102 | Spring Valley Development Co LLC | Centennial, CO 80014 | Oil & Gas Operator | Feb 2025 |
| 28103 | Spring Valley Oil & Gas Inc | Drummond, OK 73735 | Oil & Gas Operator | Feb 2025 |
| 28104 | Spring, Harry A. | Ardmore, OK 73401 | Oil Operator | Jul 2012 |
| 28105 | Springer Energy Company, LLC | Akron, OH 44313 | Oil & Gas Operator | Dec 2023 |
| 28106 | Springer, Lee A. | Independence, KS 67301 | Oil Operator | May 2014 |
| 28107 | Springfield Oil Services, Inc. | Mamaroneck, NY 10543 | Oil & Gas Operator | Apr 2025 |
| 28108 | Springs, Jesse | Luling, TX 78648 | Oil & Gas Operator | Jun 1998 |
| 28109 | Springville-Griffith Institute Central School Dist | Springville, NY 14141 | Gas Operator | Dec 2023 |
| 28110 | Sproul, C. R. Inc. | Eldorado, TX 76936 | Oil & Gas Operator | Aug 2000 |
| 28111 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Apr 2025 |
| 28112 | SPS, Inc. | Cheney, KS 67025 | Oil & Gas Operator | Dec 2024 |
| 28113 | Spur Energy | Midland, TX 79708 | Oil & Gas Operator | Mar 1996 |
| 28114 | Spur Energy Partners LLC | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 28115 | Spur Operating Co. | Austin, TX 78701 | Oil & Gas Operator | Apr 2025 |
| 28116 | Spurgeon William Allan | Nowata, OK 74048-9713 | Oil Operator | Feb 2010 |
| 28117 | Spurgeon William C & Tammy D | Hominy, OK 74035 | Oil & Gas Operator | Jan 2025 |
| 28118 | Spyglass Cedar Creek, LP | | Gas Operator | Jul 2012 |
| 28119 | Spyglass Oil & Gas LLC | | Oil & Gas Operator | Dec 2024 |
| 28120 | Square Mile Energy, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 28121 | Square One Corporation | Giddings, TX 78942 | Oil & Gas Operator | Dec 2012 |
| 28122 | Square One Energy, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Oct 2015 |
| 28123 | Squaw Mountain Oil, LLC | Jacksboro, TX 76458 | Oil Operator | Apr 2025 |
| 28124 | Squirrel Oil & Gas Inc | Tonkawa, OK 74653 | Oil & Gas Operator | Mar 2022 |
| 28125 | Squyres Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 28126 | SR Production Corp. | Liberty, TX 77575 | Oil & Gas Operator | Mar 2010 |
| 28127 | Sram Oil Incorporated | Winfield, KS 67156 | Oil & Gas Operator | Aug 2005 |
| 28128 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 28129 | SRP Production Corp. | | Oil & Gas Operator | Nov 1997 |
| 28130 | SRS Properties, LLC | Whitehouse, TX 75791 | Oil & Gas Operator | Apr 2025 |
| 28131 | SRV Oil Co | Coleman, TX 76834 | Oil Operator | Apr 2025 |
| 28132 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 28133 | SS Operating LLC | Water Valley, TX 76958 | Oil Operator | Apr 2025 |
| 28134 | SSB Production LC | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2025 |
| 28135 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2025 |
| 28136 | Ssi Energy LLC | | Oil & Gas Operator | Jul 2021 |
| 28137 | SSM Partnership-PV79 | | Oil Operator | Jun 1989 |
| 28138 | Ssouri Oil Ventures | | Oil Operator | Jan 2022 |
| 28139 | St Cleric Resources LLC | | Gas Operator | Jan 2025 |
| 28140 | St Croix LTD | Fairlawn, OH 44334 | Oil & Gas Operator | Dec 2022 |
| 28141 | St Croix Operating Inc | | Oil Operator | Jan 2025 |
| 28142 | St James Energy Operating Inc | | Oil & Gas Operator | Aug 2013 |
| 28143 | St Joe Petroleum U S Corp | | Oil & Gas Operator | Aug 2000 |
| 28144 | St Joseph Min Co | | Oil Operator | Dec 2023 |
| 28145 | St Michael Exploration | | Oil & Gas Operator | Jun 1987 |
| 28146 | St Oil Company | Denver, CO 80264-2101 | Oil & Gas Operator | Dec 2010 |
| 28147 | St Oil Company LLC | New York, NY 10005-4016 | Oil Operator | Jan 2025 |
| 28148 | St Petroleum, Inc. | Edgerton, KS 66021 | Oil Operator | Dec 2024 |
| 28149 | St. Cajetan Oil Company, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2025 |
| 28150 | St. Clair Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Mar 2008 |
| 28151 | St. Clair Oil Co. | St Clairsville, OH 43950 | Oil & Gas Operator | Dec 1997 |
| 28152 | St. Columban'S On The Lake, Inc. | Silver Creek, NY 14136 | Gas Operator | Dec 2023 |
| 28153 | St. Croix Corporation | | Oil & Gas Operator | Apr 1990 |
| 28154 | St. James Oil Corporation | | Oil & Gas Operator | Dec 2009 |
| 28155 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 28156 | St. Mary Energy Company | Houston, TX 77079 | Oil & Gas Operator | Aug 2008 |
| 28157 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 28158 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 28159 | St. Paul Oil And Gas Corp. | | Oil & Gas Operator | Aug 1991 |
| 28160 | Sta-Kel Incorporated | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 28161 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 28162 | Staab Energy & Leasing | | Oil Operator | May 2024 |
| 28163 | Staab Oil Co., A General Partnership | Hays, KS 67601 | Oil Operator | Dec 2024 |
| 28164 | Staats & Martin | | Oil Operator | Aug 2013 |
| 28165 | Staats, William N | | Oil & Gas Operator | Jan 2025 |
| 28166 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Apr 2025 |
| 28167 | Stach Enterprises LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2021 |
| 28168 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Apr 2025 |
| 28169 | Stachler William L | Danville, OH 43014 | Oil & Gas Operator | Dec 1989 |
| 28170 | Stack Production | Dewey, OK 74029 | Oil & Gas Operator | Mar 2002 |
| 28171 | Stackhouse Construction Inc | Orwell, OH 44076 | Oil & Gas Operator | Dec 2023 |
| 28172 | Stacy Operating LLC | Cushing, OK 74023 | Oil & Gas Operator | Feb 2025 |
| 28173 | Stacy Reamy | Purdon, TX 76679 | Oil Operator | Apr 2025 |
| 28174 | Stafford, A C | | Oil Operator | Dec 2003 |
| 28175 | Stag Oil Producers Inc | Midland, TX 79701 | Oil & Gas Operator | Jan 1998 |
| 28176 | Stagecoach Pipeline & Storage Company LLC | | Gas Operator | Dec 2005 |
| 28177 | Stagg Investment Group, Inc. | Midland, TX 79701 | Oil Operator | May 2013 |
| 28178 | Staggered T Oil LLC | Quanah, TX 79252 | Oil Operator | Apr 2025 |
| 28179 | Staggs Richard | | Oil & Gas Operator | Oct 2011 |
| 28180 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 28181 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Feb 2025 |
| 28182 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jan 2025 |
| 28183 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 28184 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 28185 | Stal Oil Production, L.L.C. | Argyle, TX 76226 | Oil Operator | Apr 2025 |
| 28186 | Stalcup Oil Comp | | Oil Operator | Dec 1992 |
| 28187 | Stalcup Oil Company | | Oil Operator | Oct 2009 |
| 28188 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 28189 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 28190 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 28191 | Stalica, Donald E. | Pavilion, NY 14525 | Gas Operator | Dec 2023 |
| 28192 | Stalking Horse Energy, Limited Liability Company | Houston, TX 77084 | Oil & Gas Operator | Apr 2025 |
| 28193 | Stalking Horse Energy, LLC | Denver, CO 80246 | Oil Operator | Jan 2025 |
| 28194 | Stallings Eugene | | Oil Operator | Jul 1994 |
| 28195 | Stallion Energy LLC | Houston, TX 77090 | Oil & Gas Operator | Oct 2009 |
| 28196 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 28197 | Stallion Inc. | Hurricane, WV 25526 | Oil & Gas Operator | Dec 2021 |
| 28198 | Stallion Oil Company | Lafayette, LA 70505 | Oil & Gas Operator | Jun 2004 |
| 28199 | Stallion Oil Corporation | | Oil & Gas Operator | Nov 1987 |
| 28200 | Stallion Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |