| 1 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 2 | S & P Energy | Benbrook, TX 76126 | Oil & Gas Operator | Oct 1994 |
| 3 | S & R Operating | Merkel, TX 79536 | Oil & Gas Operator | Mar 2008 |
| 4 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 5 | S.U.E. Company | Abilene, TX 79604 | Oil Operator | Jan 1998 |
| 6 | Sabio Oil & Gas Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1998 |
| 7 | Sabre Oil And Gas Corp. | Houston, TX 77063 | Oil & Gas Operator | Mar 2025 |
| 8 | Safari Resources, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 9 | Saling Oil Co. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2002 |
| 10 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 11 | Sanders Energy LLC | Aledo, TX 76008 | Oil & Gas Operator | Mar 2025 |
| 12 | Sandstone Services, LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 13 | Santa Fe Energy Oper. Part., LP | Houston, TX 77057 | Oil & Gas Operator | Dec 1994 |
| 14 | Saxon Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Oct 2009 |
| 15 | Schalk, Thomas S. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 1995 |
| 16 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 17 | Schkade Production Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2020 |
| 18 | Schkade, Carl E. | Albany, TX 76430 | Oil & Gas Operator | Sep 2009 |
| 19 | Schkade, Louis | Albany, TX 76430 | Oil & Gas Operator | Mar 2008 |
| 20 | Scott Operating, Inc. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 21 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 22 | Scranton Exploration | Eastland, TX 76448 | Oil & Gas Operator | Mar 2025 |
| 23 | Seago Operating Co., L.L.C. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2011 |
| 24 | Sedona Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 25 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 26 | Seismotech Energy, Incorporated | Plano, TX 75075 | Oil & Gas Operator | Aug 2003 |
| 27 | Semper Fidelis Oil & Gas, LLC | Allen, TX 75013 | Oil & Gas Operator | Apr 2013 |
| 28 | Sequoia Energy Resources | Dallas, TX 75207 | Oil & Gas Operator | Mar 2025 |
| 29 | Sequoia Fossil Fuels, Inc. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 30 | Sequoia Natural Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 31 | Seven Wells Oil & Gas Expl. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2014 |
| 32 | Shamrock Minerals Corporation | Merkel, TX 79536 | Oil & Gas Operator | Nov 1998 |
| 33 | Sharp Image Energy, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Mar 2025 |
| 34 | Shelby, Michael H. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2025 |
| 35 | Sherman, L. B. | Early, TX 76803 | Oil & Gas Operator | Jun 1998 |
| 36 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Mar 2025 |
| 37 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Mar 2025 |
| 38 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 39 | Sinclair Exploration Company | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 40 | Sissom Oil | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 41 | Sky Development Corporation | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 42 | Sky Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 43 | Smail, James R. | Big Prairie, OH 44611 | Oil & Gas Operator | Dec 1998 |
| 44 | Smalley, Bill | Albany, TX 76430 | Oil & Gas Operator | Jul 2001 |
| 45 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 46 | Smith, Joe T., Inc. | Hawley, TX 79525 | Oil & Gas Operator | Mar 2025 |
| 47 | Snyder Drilling Corp. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 48 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 49 | Southern Crude, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2017 |
| 50 | Southern Exploration, Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Aug 2023 |
| 51 | Southern Mineral Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2001 |
| 52 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 53 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 54 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 55 | Spence Energy Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2025 |
| 56 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Mar 2025 |
| 57 | Spirit Energy L.L.C. | Caddo Mills, TX 75135 | Oil & Gas Operator | Dec 2018 |
| 58 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2025 |
| 59 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 60 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 61 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 62 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Mar 2025 |
| 63 | Startex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 64 | Stasney, H. R. & Sons, LTD. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 65 | Stearns Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 1993 |
| 66 | Stelzer, J. C. | Post, TX 79356 | Oil & Gas Operator | Dec 1995 |
| 67 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 68 | Stober Oil And Gas Services, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 69 | Stone & Williams Oil&Gas Co.,Inc | Holliday, TX 76366 | Oil Operator | Apr 2013 |
| 70 | Stovall Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 71 | Strand, Carlton Oil | Stamford, TX 79553 | Oil & Gas Operator | May 1997 |
| 72 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 73 | Strawn Operating Co., L.L.C. | El Paso, TX 79912 | Oil Operator | Mar 2025 |
| 74 | Strawn Partners Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 75 | Stroube Energy Corporation | Dallas, TX 75248 | Oil & Gas Operator | Jan 2012 |
| 76 | Subsurface Energy Corp. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2025 |
| 77 | Subsurface Production, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2025 |
| 78 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Mar 2025 |
| 79 | Sundance Consulting Corp. | Abilene, TX 79605 | Oil & Gas Operator | Mar 2025 |
| 80 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 81 | Sunwest Oklahoma, Inc | Dallas, TX 75231 | Oil & Gas Operator | May 2023 |
| 82 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2025 |
| 83 | Susanna Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 84 | Sutton Oil Co. | Austin, TX 78728 | Oil & Gas Operator | Mar 2025 |
| 85 | Swartz Oil Company | San Angelo, TX 76906 | Oil & Gas Operator | Mar 2025 |
| 86 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2025 |