| 10101 | Sizemore, James | Hardin, TX 77561 | Oil & Gas Operator | Jun 2003 |
| 10102 | Skaar, K. M. Oil & Gas Co. | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 10103 | Skeeter Oil L.L.C. | Big Spring, TX 79720 | Oil Operator | Jun 2026 |
| 10104 | Skewes Operating Company | Bluefield, VA 24605 | Oil & Gas Operator | Jun 2026 |
| 10105 | Ski Production, LLC | Muenster, TX 76252 | Oil Operator | Jun 2026 |
| 10106 | Skidmore Energy,Inc. | Salado, TX 76571 | Oil & Gas Operator | Jun 1999 |
| 10107 | Skidmore Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jul 1997 |
| 10108 | Skidmore, James E. | Nocona, TX 76255 | Oil & Gas Operator | Nov 2008 |
| 10109 | Skinner Cattle, Inc. | Nocona, TX 76255 | Oil Operator | Jun 2026 |
| 10110 | Skinner Energy Management, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jan 2011 |
| 10111 | Skinner, Robert V. | Spearman, TX 79081 | Oil & Gas Operator | Aug 2008 |
| 10112 | Skinner, W. E. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2026 |
| 10113 | Skinnergy Co. | Spearman, TX 79081 | Oil & Gas Operator | Jun 2026 |
| 10114 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 10115 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2026 |
| 10116 | Sklar-Tex L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 10117 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 10118 | SKS Oil | Olney, TX 76374 | Oil & Gas Operator | Jun 2026 |
| 10119 | Sky Development Corporation | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 10120 | Sky Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 10121 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2026 |
| 10122 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2026 |
| 10123 | Skytop Oil & Gas | Giddings, TX 78942 | Oil & Gas Operator | Jun 2026 |
| 10124 | Skyway Energy LLC | Leesburg, OH 34748 | Oil & Gas Operator | Dec 2020 |
| 10125 | Slack Oil & Gas | Refugio, TX 78377 | Oil & Gas Operator | Dec 2012 |
| 10126 | Slack, R. C. | Pecos, TX 79772 | Oil & Gas Operator | Jul 2000 |
| 10127 | Slagel, H. P. Prod. Co. | Snyder, TX 79550 | Oil & Gas Operator | Dec 2006 |
| 10128 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Jun 2026 |
| 10129 | Slape Oil Company, Inc. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 10130 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Jun 2026 |
| 10131 | Slatex Well Service, Inc. | Batson, TX 77519 | Oil Operator | Jun 2026 |
| 10132 | Slaughter J M Oil Company | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2001 |
| 10133 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 10134 | Sledge Bros. Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Mar 2016 |
| 10135 | Sledge, H. G., Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2016 |
| 10136 | Slick Inc. | MC Gregor, TX 76657 | Oil Operator | Jun 2026 |
| 10137 | Slick Production, LLC | Muenster, TX 76252 | Oil & Gas Operator | Nov 2025 |
| 10138 | Slingshot Oil & Gas | Houston, TX 77019 | Oil Operator | Jun 2026 |
| 10139 | Sloan Oil Corporation | Humble, TX 77347 | Oil & Gas Operator | Mar 2015 |
| 10140 | Sloan Petroleum Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 10141 | SLT Dakota Operating, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jun 2026 |
| 10142 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Jun 2026 |
| 10143 | SM Operating Company LLC | Austin, TX 78709 | Oil & Gas Operator | Jun 2026 |
| 10144 | Smackover Oil Treaters, LTD. | Odessa, TX 79768 | Oil & Gas Operator | Jun 2026 |
| 10145 | Smackover Shell LTD. Partnership | Houston, TX 77001 | Gas Operator | Apr 2000 |
| 10146 | Smail, James R. | Big Prairie, OH 44611 | Oil & Gas Operator | Dec 1998 |
| 10147 | Smal Energy Corp | Tyler, TX 75710 | Oil & Gas Operator | Oct 1995 |
| 10148 | Small, R.P. Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2026 |
| 10149 | Smalley, Bill | Albany, TX 76430 | Oil & Gas Operator | Jul 2001 |
| 10150 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 10151 | Smith & Marrs Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2021 |
| 10152 | Smith & Spragins | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 1995 |
| 10153 | Smith Brothers Oil & Gas, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 10154 | Smith Energy 1986a Partnership | Alvin, TX 77511 | Oil & Gas Operator | Feb 2010 |
| 10155 | Smith Energy Operating Company | Lubbock, TX 79423 | Oil & Gas Operator | Mar 2026 |
| 10156 | Smith Family LTD Partnership | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2004 |
| 10157 | Smith Oil Co. | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 10158 | Smith Operating & Management Co. | Shreveport, LA 71161 | Oil & Gas Operator | Feb 2005 |
| 10159 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 10160 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Jun 2026 |
| 10161 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Jun 2026 |
| 10162 | Smith Production Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2026 |
| 10163 | Smith Production Inc. | The Woodlands, TX 77381 | Oil & Gas Operator | Jun 2026 |
| 10164 | Smith Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jun 2026 |
| 10165 | Smith Resources, L.L.C. | Marshall, TX 75671 | Oil & Gas Operator | Jun 2026 |
| 10166 | Smith Vacuum Service | Snyder, TX 79550 | Oil & Gas Operator | Jun 2026 |
| 10167 | Smith, David | Wichita Falls, TX 76310 | Oil Operator | Jun 2026 |
| 10168 | Smith, E. J. | Fort Worth, TX 76137 | Oil & Gas Operator | Jun 2026 |
| 10169 | Smith, E.N. III Energy Corp. | Marshall, TX 75671 | Oil & Gas Operator | Sep 2006 |
| 10170 | Smith, Joe H. | Argyle, TX 76226 | Oil & Gas Operator | Nov 1998 |
| 10171 | Smith, John A. | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 10172 | Smith, L C Production | Jacksonville, TX 75766 | Oil Operator | Jun 2026 |
| 10173 | Smith, L. C. | Jacksonville, TX 75766 | Oil & Gas Operator | Jun 2026 |
| 10174 | Smith, O. Dale & Smith, A. C. | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2000 |
| 10175 | Smith, R. E. Interests, Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 1998 |
| 10176 | Smith, Ted H. | Wichita Falls, TX 76310 | Oil & Gas Operator | Sep 1998 |
| 10177 | Smith, W. Don | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2001 |
| 10178 | Smith, W.T. | Panhandle, TX 79068 | Oil & Gas Operator | Nov 2005 |
| 10179 | SMR Natural Gas Ventures Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 1999 |
| 10180 | Smulcer, Jimmy A. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2002 |
| 10181 | Smyth Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2003 |
| 10182 | Smyth Oil LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 10183 | SN Ef Maverick, LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2023 |
| 10184 | SN Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 10185 | Snappy Services, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 10186 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 10187 | Snow Oil & Gas Inc. | Andrews, TX 79714 | Oil & Gas Operator | Jun 2026 |
| 10188 | Snow Oil Company | Nocona, TX 76255 | Oil Operator | Jun 2026 |
| 10189 | Snow Operating Co., Inc. | Haltom City, TX 76117 | Oil & Gas Operator | Feb 2024 |
| 10190 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 10191 | Snuggs Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Jan 2024 |
| 10192 | SNW Operating Company | Borger, TX 79008 | Oil & Gas Operator | Jun 2026 |
| 10193 | Snyder Drilling Corp. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 10194 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 10195 | Snyder Partners | Cody, WY 82414 | Oil & Gas Operator | Feb 2026 |
| 10196 | So Operating Company | Cisco, TX 76437 | Oil & Gas Operator | Jun 2026 |
| 10197 | Socorro Exploration, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Jun 2026 |
| 10198 | Sogc, Inc. | Salt Lake Cty, UT 84131 | Oil & Gas Operator | Apr 2026 |
| 10199 | Sogc, LLC | Salt Lake Cty, UT 84131 | Oil & Gas Operator | Jun 2026 |
| 10200 | Sogo III LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2017 |