| 1 | S & L Energy, Inc.C/O John D. Lawrence, Jr. | Fishtail, MT 59028 | Oil Operator | Jun 2025 |
| 2 | S & W Petroleum Consultants, Inc. | Broomfield, CO 80020 | Gas Operator | Feb 2004 |
| 3 | Saco, Town Of | Saco, MT 59261 | Gas Operator | Aug 2025 |
| 4 | Saga Petroleum, LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2018 |
| 5 | Sage Creek Colony | Chester, MT 59522 | Gas Operator | Aug 2025 |
| 6 | Sagebrush Operating LLC | Denver, CO 80203 | Oil & Gas Operator | May 2025 |
| 7 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 8 | Samson Oil & Gas USA Inc | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 9 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 10 | Sands Oil Company Inc | Billings, MT 59103 | Oil & Gas Operator | Sep 2025 |
| 11 | Sannes, Ronald M. Or Margaret Ann | Billings, MT 59103 | Oil & Gas Operator | Oct 2017 |
| 12 | Sauby, Warren | Kevin, MT 59454 | Oil Operator | Feb 2009 |
| 13 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Nov 2025 |
| 14 | Sdoco, LLC | Highlands Ranch, CO 80129 | Oil Operator | Jul 2025 |
| 15 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 16 | Seymour, James & Lorraine | Cut Bank, MT 59427 | Oil Operator | Jul 2022 |
| 17 | Shadco | Worland, WY 82401 | Oil & Gas Operator | Aug 2025 |
| 18 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Sep 2025 |
| 19 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 20 | Sinclair Oil & Gas Company | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Nov 2025 |
| 21 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2025 |
| 22 | Slohcin, Inc. | Shelby, MT 59474 | Oil Operator | Aug 2025 |
| 23 | Slow Poke Production-George L. Dobson Dba | Cut Bank, MT 59427 | Gas Operator | Jun 2025 |
| 24 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Nov 2025 |
| 25 | Smith, Loren E. And Foster, Chas. P. | Broomfield, CO 80020 | Oil Operator | Sep 2025 |
| 26 | Soap Creek Associates, Inc. | Broomfield, CO 80020-2995 | Oil Operator | Sep 2025 |
| 27 | Solomon Exploration Inc. | Havre, MT 59501 | Gas Operator | Jul 2025 |
| 28 | Somont Oil Co., Inc. | Spring, TX 77379 | Oil & Gas Operator | Sep 2025 |
| 29 | Sonkar, Inc. | Sunburst, MT 59482 | Oil Operator | Sep 2025 |
| 30 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 31 | Spectrum Energy Inc | Scottsdale, AZ 85257 | Oil & Gas Operator | Oct 2003 |
| 32 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 33 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 34 | Stalking Horse Energy, LLC | Denver, CO 80246 | Oil Operator | Aug 2025 |
| 35 | Stearns Oil Company LLC | Willison, ND 58801 | Oil & Gas Operator | Sep 2025 |
| 36 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2025 |
| 37 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 38 | Stivers Inc | Graham, TX 76450 | Oil & Gas Operator | May 2003 |
| 39 | Stone Energy Corporation | Denver, CO 80202-2828 | Oil & Gas Operator | Oct 2014 |
| 40 | Stone Energy LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 41 | Storm Cat Energy USA Operating Corp | Denver, CO 80202 | Gas Operator | Jun 2017 |
| 42 | Stovall Oil Company | Casper, WY 82602 | Oil & Gas Operator | Aug 1998 |
| 43 | Stratex Oil And Gas, Inc. | Watertown, CT 06795 | Oil & Gas Operator | Jun 2016 |
| 44 | Striper Oil, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Apr 2002 |
| 45 | Summit Gas Resources Inc | Sheridan, WY 82801 | Gas Operator | Dec 2023 |
| 46 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 47 | Sun Coulee, LLC | Martinsdale, MT 59053 | Oil & Gas Operator | Jun 2025 |
| 48 | Sunburst Exploration, Inc. | | Oil & Gas Operator | Jul 2000 |
| 49 | Swanson Oil & Gas LLC | Williston, ND 58802 | Oil & Gas Operator | Sep 2025 |
| 50 | Synergy Offshore LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2022 |