| 10001 | Shenandoah Petroleum Corporation | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 10002 | Shenandoah Resources LLC | Houston, TX 77086 | Oil & Gas Operator | Apr 2020 |
| 10003 | Sheneeda Energy, LLC | O Brien, TX 79539 | Oil Operator | Jun 2025 |
| 10004 | Shepperd, William M. | Houston, TX 77279 | Oil & Gas Operator | Sep 2012 |
| 10005 | Sheridan Energy,Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2000 |
| 10006 | Sheridan Production Co III, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 10007 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2026 |
| 10008 | Sherley, O. C. | Megargel, TX 76370 | Oil & Gas Operator | Aug 2003 |
| 10009 | Sherman Oil Company LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 10010 | Sherman, L. B. | Early, TX 76803 | Oil & Gas Operator | Jun 1998 |
| 10011 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 2026 |
| 10012 | Shield Operating Co. | Georgetown, TX 78627 | Oil & Gas Operator | Aug 2003 |
| 10013 | Shield Petroleum | College Sta, TX 77845 | Oil & Gas Operator | Apr 2026 |
| 10014 | Shifflett Operating Company | Snyder, TX 79550 | Oil & Gas Operator | Apr 2026 |
| 10015 | Shiloh Oil Company LLC | Williston, FL 32696 | Oil & Gas Operator | Apr 2026 |
| 10016 | Shiner Exploration, LLC | Houston, TX 77091 | Oil & Gas Operator | Apr 2026 |
| 10017 | Shines'S Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2009 |
| 10018 | Shinnery Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 10019 | Shirley, B. J. | Lawn, TX 79530 | Oil & Gas Operator | Mar 2008 |
| 10020 | Shivers, Linward, Operator | Shreveport, LA 71161 | Oil & Gas Operator | Sep 1997 |
| 10021 | SHL Operating | Lubbock, TX 79416 | Oil & Gas Operator | Apr 2026 |
| 10022 | Shoco Production LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 10023 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 10024 | Shore Petroleum Corp. | Corpus Christ, TX 78401 | Oil & Gas Operator | Apr 2026 |
| 10025 | Shore Production Co. | Longview, TX 75604 | Oil & Gas Operator | Aug 2005 |
| 10026 | Shoreham Oil & Gas Company, Inc. | Katy, TX 77492 | Oil & Gas Operator | Apr 2026 |
| 10027 | Shoreline Energy Partners, LLC | Chandler, AZ 85249 | Oil Operator | May 2011 |
| 10028 | Shoreline Petroleum Corp. | Channelview, TX 77530 | Oil & Gas Operator | Sep 2003 |
| 10029 | Shoreline Production Serv., Inc. | Rockport, TX 78381 | Oil & Gas Operator | Apr 2002 |
| 10030 | Short Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 10031 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 10032 | Showdown Energy Corporation | Dallas, TX 75230 | Oil & Gas Operator | Aug 2003 |
| 10033 | Showdown Operating, Inc. | Dallas, TX 75230 | Oil & Gas Operator | May 1996 |
| 10034 | Showhorn Holding Co., L.L.C. | Normangee, TX 77871 | Oil Operator | Apr 2026 |
| 10035 | SHS Operating Company | Shreveport, LA 71149 | Oil & Gas Operator | Jan 2025 |
| 10036 | Shubuta Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Sep 1998 |
| 10037 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 10038 | Shumate, Jess | Brookesmith, TX 76827 | Oil Operator | Jun 2006 |
| 10039 | SHWJ Oil & Gas Co., Inc. | Oil City, LA 71061 | Oil Operator | Apr 2026 |
| 10040 | Siana Oil & Gas | Conroe, TX 77305 | Oil & Gas Operator | Apr 2026 |
| 10041 | Sideline Oil & Gas, L.P. | Friendswood, TX 77549 | Oil Operator | Apr 2026 |
| 10042 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 10043 | Sidwell Operating Company, L.P. | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2026 |
| 10044 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 10045 | Siempre Energy Operating, LLC | Houston, TX 77094 | Oil Operator | Apr 2026 |
| 10046 | Sien Operating Company, LLC | San Antonio, TX 78209 | Oil Operator | May 2023 |
| 10047 | Sierra Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2008 |
| 10048 | Sierra Group, L.L.C. | San Angelo, TX 76904 | Oil & Gas Operator | Jan 2025 |
| 10049 | Sierra Lima Oil & Gas, LLC | Abilene, TX 79604 | Oil & Gas Operator | Nov 2025 |
| 10050 | Sierra Madre Natural Res., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 10051 | Sierra Minerals, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Apr 2026 |
| 10052 | Sierra Oil Company | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2026 |
| 10053 | Sierra Resources, Inc. | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 10054 | Sierra Resources, LLC | Houston, TX 77219 | Oil & Gas Operator | Aug 2021 |
| 10055 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 10056 | Sigma Energy & Explor., Co LLC | Ozona, TX 76943 | Oil & Gas Operator | Feb 2010 |
| 10057 | Sigma Exploration Corp., The | Dallas, TX 75230 | Oil & Gas Operator | Sep 1998 |
| 10058 | Sigma Oper & Develop Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 10059 | Sigmon Construction Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 10060 | Sigmon Production Company, Inc. | Longview, TX 75608 | Oil & Gas Operator | Dec 2013 |
| 10061 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Apr 2026 |
| 10062 | Signal Oil Company, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 10063 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 10064 | Sikes, Arlas M. | Brownwood, TX 76801 | Oil & Gas Operator | May 2000 |
| 10065 | Siltstone Resources Op II, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Apr 2026 |
| 10066 | Silver Anchor Resources LLC | Azle, TX 76020 | Oil & Gas Operator | Apr 2026 |
| 10067 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 10068 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Apr 2026 |
| 10069 | Silver Creek Permian Op Co, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2023 |
| 10070 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 10071 | Silver Cross Energy Partners LLC | Richmond, TX 77469 | Oil & Gas Operator | Apr 2026 |
| 10072 | Silver Fox Oil & Gas LLC | McAllen, TX 78504 | Oil & Gas Operator | Apr 2026 |
| 10073 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 10074 | Silver Hill Energy Partners, LLC | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 10075 | Silver Oak Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2016 |
| 10076 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 10077 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Apr 2026 |
| 10078 | Silver Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Apr 2026 |
| 10079 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Feb 2026 |
| 10080 | Silver Rock Energy, LLC | Terrell, TX 75160 | Oil Operator | Apr 2026 |
| 10081 | Silver Spike Energy Oper, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2015 |
| 10082 | Silver Star Operating Co., LLC | Nada, TX 77460 | Gas Operator | Apr 2026 |
| 10083 | Silver Tusk Operating Co. LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2018 |
| 10084 | Silverback Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2016 |
| 10085 | Silverbow Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 10086 | Silverbrook Operating II LLC | Barker, TX 77413 | Oil & Gas Operator | Apr 2026 |
| 10087 | Silverbrook Operating, LLC | Barker, TX 77413 | Oil & Gas Operator | Apr 2026 |
| 10088 | Simata Energy | Midland, TX 79708 | Oil & Gas Operator | Apr 2026 |
| 10089 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2026 |
| 10090 | Simco Oil, LLC | Lytle, TX 78052 | Oil Operator | Apr 2026 |
| 10091 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 10092 | Simmons, Stanley J. | Olney, TX 76374 | Oil & Gas Operator | Aug 1994 |
| 10093 | Simon, W. D. Oil Co. | Kermit, TX 79745 | Oil & Gas Operator | Apr 2026 |
| 10094 | Simple Operating LLC | Cross Plains, TX 76443 | Oil Operator | Apr 2026 |
| 10095 | Simpson Bros. Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 10096 | Simpson Bros. Oil Co.-Odessa | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 10097 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 10098 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 10099 | Simpson Operating Services, LP | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2026 |
| 10100 | Simpson, A. E. | Electra, TX 76360 | Oil & Gas Operator | Dec 2006 |