| 101 | Ransom Horne,Jr. | | Oil & Gas Operator | Dec 1991 |
| 102 | RLS Partnership | | Oil Operator | Apr 1983 |
| 103 | Russell A. Flowers | | Oil Operator | May 1995 |
| 104 | Ryca Energy Partners LLC | | Oil Operator | Nov 2024 |
| 105 | Ryca Energy, LLC | | Oil & Gas Operator | Mar 2015 |
| 106 | S S M Partnership | | Oil & Gas Operator | Jul 1992 |
| 107 | S. W. Ray, Et Al | | Oil Operator | Mar 2003 |
| 108 | S.H. Loe Oil Corp. | | Oil & Gas Operator | Jan 2025 |
| 109 | Santa Fe Snyder Corporation | Houston, TX 77024 | Oil & Gas Operator | Oct 2000 |
| 110 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 111 | Sedona Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 112 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 113 | Skyhawk Energy, LLC | | Oil Operator | Dec 2024 |
| 114 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 115 | Smith Production Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 116 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 117 | Sonny King | | Oil & Gas Operator | Jan 2025 |
| 118 | Sonny King Production | | Oil & Gas Operator | Jan 2025 |
| 119 | Spirit Petroleum Company | | Oil & Gas Operator | Apr 1999 |
| 120 | SSM Partnership-PV79 | | Oil Operator | Jun 1989 |
| 121 | Stenco | | Oil & Gas Operator | Apr 1994 |
| 122 | Stroud Production LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 123 | Sun Exploration And Production Co | | Oil & Gas Operator | Jan 1990 |
| 124 | Texaco Producing Inc. | Rock Springs, WY 82901 | Oil & Gas Operator | Dec 2000 |
| 125 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 126 | Thomas Turman | | Oil & Gas Operator | Dec 1991 |
| 127 | Thornton Page Natural Gas | | Oil & Gas Operator | Dec 2024 |
| 128 | Trident Oil & Gas Corp. | | Oil & Gas Operator | Sep 2000 |
| 129 | Tundra Operating LLC | Spring, TX 77386 | Oil Operator | May 2017 |
| 130 | Universal Producers, Inc. | | Oil Operator | Jun 2001 |
| 131 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2025 |
| 132 | W.D. Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2001 |
| 133 | Whitton Company, Inc. | | Oil & Gas Operator | Jul 2020 |
| 134 | Wilcox Energy Company | | Oil & Gas Operator | Oct 2025 |
| 135 | Windham Oil Corp. | | Oil & Gas Operator | Dec 2024 |
| 136 | Womack & Price | | Oil & Gas Operator | Oct 1990 |
| 137 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |