| 101 | Special Energy Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Mar 2026 |
| 102 | Spence Energy Company | Dallas, TX 75360 | Oil & Gas Operator | Mar 2026 |
| 103 | Spenergy Corp. | Midland, TX 79701 | Oil & Gas Operator | Dec 1999 |
| 104 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Mar 2026 |
| 105 | Spur Energy Partners LLC | Houston, TX 77024 | Oil & Gas Operator | Jan 2026 |
| 106 | St. Clair Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Mar 2008 |
| 107 | Standard Silver Corp | Richardson, TX 750801946 | Gas Operator | Aug 2024 |
| 108 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 109 | Stanolind Operating LLC Dba Stanolind NM LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2014 |
| 110 | Stanolind Permian LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2026 |
| 111 | Stanolind SJ LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2018 |
| 112 | Star Acquisition VII, LLC | Littleton, CO 801249743 | Oil & Gas Operator | Jul 2007 |
| 113 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 114 | Stearns | Crossroads, NM 88114 | Oil & Gas Operator | Dec 2025 |
| 115 | Stephens & Johnson Op Co | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 116 | Steven D Ruppert | Tesuque, NM 87574 | Oil & Gas Operator | Feb 2022 |
| 117 | Stevenson Oil Co | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 118 | Steward Energy II, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 119 | Strata Petroleum Co. | Midland, TX 79701 | Oil & Gas Operator | May 1997 |
| 120 | Strata Production Co | Roswell, NM 882021030 | Oil & Gas Operator | Jan 2026 |
| 121 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Mar 2026 |
| 122 | Summers Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2002 |
| 123 | Summit Resources Management LLC | Edmond, OK 73083 | Oil & Gas Operator | Dec 2025 |
| 124 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Mar 2026 |
| 125 | Sunlight Exploration, Inc. | Canyon, TX 79015 | Oil & Gas Operator | Mar 2026 |
| 126 | Sunset 2018, LLC | Farmington, NM 87401 | Oil & Gas Operator | Jan 2026 |
| 127 | Sunset Well Service Holdings Inc | Midland, TX 79708 | Oil Operator | Apr 2013 |
| 128 | Susan Sullivan Dba Lizard Production | Bloomfield, NM 87413 | Oil & Gas Operator | Mar 2011 |
| 129 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 130 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 131 | Sylvite Corp | Tulsa, OK 741363908 | Oil & Gas Operator | Dec 2000 |
| 132 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2025 |
| 133 | Synergy Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Nov 2019 |
| 134 | Synergy Operating LLC | Farmington, NM 87499 | Oil & Gas Operator | Nov 2025 |
| 135 | Synergy Resources | Artesia, NM 88210 | Oil & Gas Operator | Jan 2015 |