| 1 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 2 | Sage Petroleum LLC | Casper, WY 82601 | Oil Operator | Jun 2008 |
| 3 | Salt Creek West Partners | | Oil Operator | Jul 1995 |
| 4 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 5 | Sauer Bill Oil & Gas Company LLC | Casper, WY 82604 | Oil & Gas Operator | Jun 1999 |
| 6 | Scarlett Energy Enterprises LLC | Watchung, NJ 07069 | Oil & Gas Operator | Oct 2014 |
| 7 | Sharples Phillip T Trust | Denver, CO 80264 | Oil & Gas Operator | Nov 2020 |
| 8 | Skinner Corporation | | Oil Operator | Apr 1985 |
| 9 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 10 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 11 | Smokey Gap Oil Company LLC | | Oil Operator | Aug 2025 |
| 12 | South Pass Petroleum Inc | Casper, WY 82601 | Oil & Gas Operator | Aug 2025 |
| 13 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 14 | Southland Royalty Company LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2021 |
| 15 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Aug 2025 |
| 16 | Spellbound Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 17 | Stealth Energy Inc | Billings, MT 59101 | Oil Operator | Dec 2011 |
| 18 | Stealth Energy USA Inc | Billings, MT 59104 | Oil Operator | Dec 2017 |
| 19 | Stovall Oil Company | Casper, WY 82602 | Oil & Gas Operator | Aug 1998 |
| 20 | Strachan Exploration Inc | Englewood, CO 80112 | Oil & Gas Operator | Jul 2025 |
| 21 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 22 | Sunshine Valley Petroleum | Casper, WY 82605 | Oil & Gas Operator | Aug 2025 |
| 23 | Supron Energy Corp | | Oil & Gas Operator | Oct 1995 |
| 24 | Synergy Offshore LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2022 |