| 1 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 2 | Saba Energy Of Texas Inc | Houston, TX 77042 | Oil & Gas Operator | Jul 2007 |
| 3 | Saber Oil & Gas Ventures, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 4 | Sabinal Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 5 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 6 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 7 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Oct 2025 |
| 8 | Saguaro Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 9 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | Oct 2025 |
| 10 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 11 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 12 | Samson Exploration LLC | Tulsa, OK 74101 | Oil & Gas Operator | Aug 2025 |
| 13 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 14 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 15 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 16 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 17 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 18 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Oct 2025 |
| 19 | Santo Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 20 | Sapient Energy Corp | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2002 |
| 21 | Savior Oil Company | Allen, TX 75013 | Oil Operator | Nov 2015 |
| 22 | Sayers Operating Company | Midland, TX 79705 | Oil & Gas Operator | Feb 2005 |
| 23 | SBJ Oil & Gas | MC Camey, TX 79752 | Oil & Gas Operator | Feb 2009 |
| 24 | SBJ Oil & Gas, LLC | Iraan, TX 79744 | Oil & Gas Operator | Oct 2025 |
| 25 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Oct 2025 |
| 26 | Scott, Steve Engineering | Midland, TX 79710 | Oil & Gas Operator | Apr 2005 |
| 27 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 28 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 29 | SDG Resources L.P. | Montrose, CO 81402 | Oil & Gas Operator | May 2006 |
| 30 | SDX Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 31 | Sea Sand Oil Company | Fort Worth, TX 76185 | Oil & Gas Operator | Jun 1995 |
| 32 | Seay Exploration, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 33 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 34 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 35 | Sentry Exploration, Inc. | Houston, TX 77006 | Oil & Gas Operator | Oct 2025 |
| 36 | SG Interests, Inc. | Houston, TX 77010 | Oil & Gas Operator | Jun 2007 |
| 37 | SGP Operating LLC | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 38 | Shallow Production Oper, LLC | Austin, TX 78738 | Oil Operator | Oct 2025 |
| 39 | Sharp Image Energy, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Oct 2025 |
| 40 | Shell Western E&P | Houston, TX 77001 | Oil & Gas Operator | Oct 2025 |
| 41 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 42 | Shenandoah Oil, Inc. (I) | Midland, TX 79710 | Oil & Gas Operator | Apr 1996 |
| 43 | Shenandoah Petroleum Corporation | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 44 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 45 | Shoreham Oil & Gas Company, Inc. | Katy, TX 77492 | Oil & Gas Operator | Oct 2025 |
| 46 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 47 | Siltstone Resources Op II, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Oct 2025 |
| 48 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Oct 2025 |
| 49 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Oct 2025 |
| 50 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 51 | Simray GP, LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2015 |
| 52 | Simray Oil & Gas, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Sep 2003 |
| 53 | Simray Operating Corp. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2009 |
| 54 | Six-S Properties, Inc. | Austin, TX 78767 | Oil & Gas Operator | Oct 2025 |
| 55 | Skaar, K. M. Oil & Gas Co. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 56 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 57 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Oct 2025 |
| 58 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 59 | Smith & Marrs Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2021 |
| 60 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 61 | Smith, John A. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 62 | Sogo III LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2017 |
| 63 | Soil Energy, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Oct 2025 |
| 64 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 65 | Sonat Exploration Co. - Midland | Houston, TX 77251 | Oil & Gas Operator | Mar 1999 |
| 66 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 67 | South Oil, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 68 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 69 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 70 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 71 | Sozo Natural Resources LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 72 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 73 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Oil & Gas Operator | Oct 2025 |
| 74 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Oct 2025 |
| 75 | Spirit Energy L.L.C. | Caddo Mills, TX 75135 | Oil & Gas Operator | Dec 2018 |
| 76 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 77 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Oct 2025 |
| 78 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jul 2025 |
| 79 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 80 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 81 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 82 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 83 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 84 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 85 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | Oct 2025 |
| 86 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 87 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 88 | Stephens, Mickie L. | MC Camey, TX 79752 | Oil & Gas Operator | Aug 1998 |
| 89 | Sterling Energy Resources, Inc. | Overland Park, KS 66212 | Oil Operator | May 2019 |
| 90 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 91 | Stevens Oil & Gas LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 92 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2025 |
| 93 | Stout Energy Partners LLC | Sulphur SPGS, TX 75482 | Oil Operator | Oct 2025 |
| 94 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Oct 2025 |
| 95 | Strategy Operating, LLC | Midland, TX 79710 | Gas Operator | Oct 2025 |
| 96 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 97 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Oct 2025 |
| 98 | Surge Solutions, Inc. | Bandera, TX 78003 | Oil Operator | Oct 2025 |
| 99 | Sven Permian, LLC | Houston, TX 77243 | Oil & Gas Operator | Aug 2025 |
| 100 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2025 |