| 1 | S M K Energy Corporation | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Oct 2025 |
| 2 | Saba Energy Of Texas Inc | Houston, TX 77042 | Oil & Gas Operator | Jul 2007 |
| 3 | Sabalo Exploration Operating,LLC | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Jan 2021 |
| 4 | Safari Production Company, Inc. | McAllen, TX 78501 | Oil & Gas Operator | Oct 2025 |
| 5 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Oct 2025 |
| 6 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 7 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 8 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 9 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 10 | San Isidro Development Co, L. C. | Sandia, TX 78383 | Oil & Gas Operator | Oct 2025 |
| 11 | San Patricio Corporation | Dinero, TX 78350 | Oil & Gas Operator | Sep 2003 |
| 12 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 13 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 14 | Sandalwood Exploration, L.P. | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 15 | Santa Fe Energy Oper. Part., LP | Houston, TX 77057 | Oil & Gas Operator | Dec 1994 |
| 16 | Santa Rosa Operating, LLC | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Oct 2025 |
| 17 | Santos USA Corp. | Houston, TX 77042 | Oil & Gas Operator | Dec 2008 |
| 18 | Saratoga Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Jul 1994 |
| 19 | Sarrita Oil Co., Inc. | Floresville, TX 78114 | Oil & Gas Operator | Jul 2002 |
| 20 | Satex Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2003 |
| 21 | Savage Exploration, Inc. | San Marcos, TX 78666 | Oil & Gas Operator | Oct 2025 |
| 22 | Saxet Energy, LTD. | Houston, TX 77057 | Oil & Gas Operator | Mar 2004 |
| 23 | Saxet Petroleum, Inc. | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 24 | Saxum Oil & Gas, LLC | Beeville, TX 78104 | Oil & Gas Operator | Oct 2025 |
| 25 | Schlachter Operating Corporation | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 26 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 27 | Schlachter, David A., Estate Of | Dallas, TX 75225 | Oil & Gas Operator | Jan 2000 |
| 28 | Scorpion Operating, Inc. | Benavides, TX 78341 | Oil Operator | Oct 2025 |
| 29 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 30 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 31 | Sedco Resources Inc | Kerrville, TX 78029 | Oil & Gas Operator | Oct 2025 |
| 32 | Sedona Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 33 | Sendero Energy Inc. | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 34 | Sequoia Management, LLC | Houston, TX 77060 | Oil & Gas Operator | Nov 2009 |
| 35 | Serna Inc. | Austin, TX 78733 | Oil Operator | Oct 2025 |
| 36 | Seventy Oil Co. | Freer, TX 78357 | Oil & Gas Operator | Mar 2002 |
| 37 | Shell Western E&P | Houston, TX 77001 | Oil & Gas Operator | Oct 2025 |
| 38 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 39 | Sheridan Energy,Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2000 |
| 40 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Oct 2025 |
| 41 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Oct 2025 |
| 42 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 43 | Simray GP, LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2015 |
| 44 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Oct 2025 |
| 45 | Slaughter J M Oil Company | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2001 |
| 46 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 47 | Smith Production Inc. | The Woodlands, TX 77381 | Oil & Gas Operator | Oct 2025 |
| 48 | Smith, R. E. Interests, Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 1998 |
| 49 | Sonat Exploration Co. - Houston | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 50 | South Texas Operating Company | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 51 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 52 | Southern Resource Company | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Mar 2022 |
| 53 | Southwest Gathering Company | Alice, TX 78332 | Oil & Gas Operator | Oct 2025 |
| 54 | Southwest Land & Minerals, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Aug 2003 |
| 55 | Southwest Oil & Land, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 1999 |
| 56 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 57 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 58 | Sparks, Sidney A., Trustee | Alice, TX 78332 | Oil & Gas Operator | Jun 1996 |
| 59 | Speed, F. Michael, Trustee | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Aug 1998 |
| 60 | Spiller Operating Co., Inc. | Round Rock, TX 78665 | Oil & Gas Operator | May 2015 |
| 61 | Star Oil & Gas | Ben Bolt, TX 78342 | Oil & Gas Operator | Oct 2025 |
| 62 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Jul 2025 |
| 63 | Sterling Engine Service, Inc. | Alice, TX 78333 | Oil & Gas Operator | Oct 2025 |
| 64 | Stinger Oil & Gas Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Oct 2013 |
| 65 | Stonegate Operators, Inc. | Addison, TX 75001 | Oil Operator | Oct 2025 |
| 66 | Sue-Ann Operating, L.C. | Victoria, TX 77903 | Oil & Gas Operator | Oct 2025 |
| 67 | Sue-Ann Production Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 68 | Suemaur Exploration, Inc. | Corpus Chrsti, TX 78470 | Oil & Gas Operator | Mar 2008 |
| 69 | Sun Exploration, Inc. | Alice, TX 78332 | Oil & Gas Operator | Oct 2025 |
| 70 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 71 | Sure Flow Oil & Gas Company | Victoria, TX 77902 | Oil & Gas Operator | Mar 2008 |
| 72 | SV Energy Company, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2017 |
| 73 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |