| 1 | Saba Energy Of Texas Inc | Houston, TX 77042 | Oil & Gas Operator | Jul 2007 |
| 2 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 3 | Sabine Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 4 | Samson Contour Energy E&P, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2017 |
| 5 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 6 | Sandhill Production Inc | Shongaloo, LA 71072 | Oil & Gas Operator | Dec 2019 |
| 7 | Sapient Energy Corp | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2002 |
| 8 | Saxon Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Oct 2009 |
| 9 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 10 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 11 | SG Interests, Inc. | Houston, TX 77010 | Oil & Gas Operator | Jun 2007 |
| 12 | Sheridan Energy,Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2000 |
| 13 | Shongaloo Midstream, LLC | | Oil Operator | Mar 2019 |
| 14 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 15 | Sierra Industries, Inc. | | Oil & Gas Operator | Apr 1989 |
| 16 | Simpson Well Service, Inc. | | Oil Operator | Dec 1996 |
| 17 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 18 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 19 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 20 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 21 | Smackover Drilling Company Inc | Shreveport, LA 71104 | Oil & Gas Operator | Jan 2025 |
| 22 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 23 | SMR Natural Gas Ventures Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 1999 |
| 24 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 25 | Southwest Operating Inc. | | Oil & Gas Operator | Dec 2024 |
| 26 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 27 | Spindletop Drilling Co. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 28 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 29 | Steaua Romana (Us) Inc. | | Oil & Gas Operator | Apr 1987 |
| 30 | Stetson Petroleum Corp. | Rollins, MT 59931 | Oil & Gas Operator | Oct 2025 |
| 31 | Story Oil And Gas Inc | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 32 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 33 | Striper Oil, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Apr 2002 |
| 34 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Oct 2025 |
| 35 | Stroud Production LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 36 | STZ Petroleum Inc. | Houston, TX 77268 | Oil & Gas Operator | Dec 1997 |
| 37 | Sugar Creek Producing Company | | Oil & Gas Operator | Dec 2010 |
| 38 | Sugar Creek Producing Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 39 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 40 | Sunland Production Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2025 |
| 41 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 42 | Sutton-Gerard Et Al | | Oil & Gas Operator | Jan 1990 |
| 43 | Sutton-Gerard-Sawyer | | Oil & Gas Operator | Jan 1990 |
| 44 | Sutton-Sawyer | | Oil Operator | Mar 1989 |
| 45 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |