| 101 | Seymour, James & Lorraine | Cut Bank, MT 59427 | Oil Operator | Jul 2022 |
| 102 | Shadco | Worland, WY 82401 | Oil & Gas Operator | Feb 2025 |
| 103 | Slohcin, Inc. | Shelby, MT 59474 | Oil Operator | Feb 2025 |
| 104 | Slow Poke Production-George L. Dobson Dba | Cut Bank, MT 59427 | Gas Operator | Dec 2024 |
| 105 | Somont Oil Co., Inc. | Spring, TX 77379 | Oil & Gas Operator | Feb 2025 |
| 106 | Sonkar, Inc. | Sunburst, MT 59482 | Oil Operator | Mar 2025 |
| 107 | Spectrum Energy Inc | Scottsdale, AZ 85257 | Oil & Gas Operator | Oct 2003 |
| 108 | Stone Energy LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 109 | Sunburst Exploration, Inc. | | Oil & Gas Operator | Jul 2000 |
| 110 | Synergy Offshore LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2022 |
| 111 | T.W.O. (Taylor Well Operating) | Missoula, MT 59803 | Oil & Gas Operator | Feb 2025 |
| 112 | Tanglewood Oil & Gas LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2017 |
| 113 | Targe Energy Exploration And Production, LLC | Denver, CO 80202 | Gas Operator | Oct 2013 |
| 114 | Tensas Delta Expl Co., LLC | Shreveport, LA 71101-5323 | Oil & Gas Operator | Jul 2021 |
| 115 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Feb 2025 |
| 116 | Thompson Oil Co. | Corsicana, TX 75151 | Oil & Gas Operator | Dec 2024 |
| 117 | Three Forks Resources LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Apr 2025 |
| 118 | TMR Exploration, Inc. | Bossier City, LA 71171 | Oil & Gas Operator | Apr 2025 |
| 119 | True Oil LLC | Casper, WY 82602 | Oil & Gas Operator | Mar 2025 |
| 120 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 121 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2025 |
| 122 | Western Natural Gas Company | Shelby, MT 59474 | Oil & Gas Operator | Jan 2025 |
| 123 | Wheless Industries, Inc. | Shreveport, LA 71101-5301 | Oil & Gas Operator | Sep 2002 |
| 124 | Woods, Pete Or Maxine | Chester, MT 59522 | Oil & Gas Operator | Jan 2025 |
| 125 | Yellowstone Petroleums Inc. | Canada, 00100 | Oil & Gas Operator | Feb 2025 |