| 1 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Oct 2025 |
| 2 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | Oct 2025 |
| 3 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 4 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 5 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 6 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 7 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Oct 2025 |
| 8 | Santa Fe Energy Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 9 | Santa Fe Exploration Company | Lubbock, TX 79408 | Oil & Gas Operator | Nov 1997 |
| 10 | Santa Fe Snyder Corporation | Houston, TX 77024 | Oil & Gas Operator | Oct 2000 |
| 11 | Saxon Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Oct 2009 |
| 12 | Schlagal, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2016 |
| 13 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 14 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 15 | Seay Exploration, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 16 | Sei Operating, LLC | Mandeville, LA 70471 | Oil & Gas Operator | Oct 2025 |
| 17 | Ser E&P, Inc. | McKinney, TX 75069 | Oil & Gas Operator | Oct 2025 |
| 18 | Shaida, John H. | Wichita, KS 67226 | Oil & Gas Operator | Oct 2025 |
| 19 | Shale Energy LLC | Jeffersonville, KY 40337 | Oil Operator | Dec 2018 |
| 20 | Shenandoah Petroleum Corporation | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 21 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Oct 2025 |
| 22 | Shirley, B. J. | Lawn, TX 79530 | Oil & Gas Operator | Mar 2008 |
| 23 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 24 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 25 | Smith & Marrs Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2021 |
| 26 | Smith Brothers Oil & Gas, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 27 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 28 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 29 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 30 | Socorro Exploration, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Oct 2025 |
| 31 | Sogc, Inc. | Salt Lake Cty, UT 84131 | Oil & Gas Operator | Aug 2025 |
| 32 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 33 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 34 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 35 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 36 | Spur Energy | Midland, TX 79708 | Oil & Gas Operator | Mar 1996 |
| 37 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 38 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 39 | Statoil Oil & Gas LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2018 |
| 40 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 41 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 42 | Stickney, F. C., Inc. | Midland, TX 79704 | Oil & Gas Operator | Oct 1998 |
| 43 | Strata Petroleum Co. | Midland, TX 79701 | Oil & Gas Operator | May 1997 |
| 44 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Oct 2025 |
| 45 | Stringer Oil & Gas Co., Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Oct 1996 |
| 46 | Striper Oil, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Apr 2002 |
| 47 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Oct 2025 |
| 48 | Swab Oil Co. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 49 | Swanson Operating, Inc. | Holliday, TX 76366 | Oil Operator | Oct 2025 |
| 50 | Swanson, Tom | Electra, TX 76360 | Oil & Gas Operator | Oct 2004 |
| 51 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2025 |