| 1 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 2 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 3 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 4 | Schaffner, Cecil | Byers, TX 76357 | Oil & Gas Operator | Apr 2004 |
| 5 | Schalk, Thomas S. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 1995 |
| 6 | Schenk Oil Co. | Scotland, TX 76379 | Oil Operator | Oct 2025 |
| 7 | Schlittler, Willard | Bryson, TX 76427 | Oil & Gas Operator | Oct 2025 |
| 8 | Seale, Don R. | Electra, TX 76360 | Oil & Gas Operator | Oct 2025 |
| 9 | Seelye, William L. | Plano, TX 75024 | Oil & Gas Operator | Oct 2005 |
| 10 | Sharp, Cherry L | Jacksboro, TX 76458 | Oil Operator | Oct 2025 |
| 11 | Sharp, John T. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2014 |
| 12 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 13 | Shelley, Richard W | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2015 |
| 14 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Oct 2025 |
| 15 | Shiloh Oil Company LLC | Williston, FL 32696 | Oil & Gas Operator | Oct 2025 |
| 16 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Oct 2025 |
| 17 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 18 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 19 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 20 | Smith, Ted H. | Wichita Falls, TX 76310 | Oil & Gas Operator | Sep 1998 |
| 21 | Smulcer, Jimmy A. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2002 |
| 22 | South Texas Drilling & Expl, Inc | San Antonio, TX 78217 | Oil & Gas Operator | Jan 1999 |
| 23 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 24 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Oil & Gas Operator | Oct 2025 |
| 25 | Spikes, Harry | Henrietta, TX 76365 | Oil & Gas Operator | Sep 2000 |
| 26 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 27 | Spragins, Ed | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 28 | Springfield Oil Services, Inc. | Mamaroneck, NY 10543 | Oil & Gas Operator | Oct 2025 |
| 29 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 30 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 31 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 32 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 33 | Stal Oil Production, L.L.C. | Argyle, TX 76226 | Oil Operator | Oct 2025 |
| 34 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 35 | Staub, Larry, Inc. | Azle, TX 76020 | Oil & Gas Operator | Oct 2025 |
| 36 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 37 | Steinberger, D. | Windthorst, TX 76389 | Oil & Gas Operator | Oct 1995 |
| 38 | Steinberger, Gerald | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2007 |
| 39 | Stelucan Energy, LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Oct 2025 |
| 40 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 41 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 42 | Stewart Construction | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 43 | Stine Massie Oil, LLC | Mansfield, TX 76063 | Oil Operator | Jul 2025 |
| 44 | Stine Oil Company | Mansfield, TX 76063 | Oil Operator | Mar 2016 |
| 45 | Stine, Ward L.Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Oct 1999 |
| 46 | Storm Oil | Burkburnett, TX 76354 | Oil & Gas Operator | Oct 2025 |
| 47 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 48 | Strawn DRLG. Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2005 |
| 49 | Street, Spencer B., Jr. | Graham, TX 76450 | Oil & Gas Operator | Mar 1998 |
| 50 | Sunday Corporation | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 51 | Sunrise Enterprises | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 52 | Sutterfield-Tisdale-Payne, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 1998 |
| 53 | Swan PC, LP | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 54 | Swan Production Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Nov 2009 |
| 55 | Swanson, Tommy Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 56 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 57 | Swenson, Clifford E. | Henrietta, TX 76365 | Oil & Gas Operator | Oct 2025 |