| 1 | Athena Energy LLC | Toronto, ON M5E 1W7 | Gas Operator | Jan 2011 |
| 2 | Bowers Oil & Gas, Inc. | Grand Junction, CO 81505-1097 | Oil & Gas Operator | Nov 2022 |
| 3 | Chelin LLC | Cut Bank, MT 59427 | Oil & Gas Operator | Aug 2024 |
| 4 | Decker Operating Co., L.L.C. | Houston, TX 77008 | Oil & Gas Operator | Nov 2024 |
| 5 | Diamond Oil & Gas LLC | Casper, WY 82604 | Oil & Gas Operator | Aug 2024 |
| 6 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 7 | Fidelity Exploration & Production Company | Denver, CO 80203 | Oil & Gas Operator | Sep 2024 |
| 8 | Miami Oil Producers Inc | Reno, NV 89501 | Oil & Gas Operator | Dec 2012 |
| 9 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Nov 2024 |
| 10 | Northland Holdings, Inc. | Calgary, AB T2J 7H2 | Gas Operator | May 2017 |
| 11 | Omimex Canada, LTD. | Fort Worth, TX 76120-3608 | Oil & Gas Operator | Aug 2024 |
| 12 | Rincon Oil & Gas LLC | Arvada, CO 80005 | Gas Operator | Jun 2022 |
| 13 | Saco, Town Of | Saco, MT 59261 | Gas Operator | Aug 2024 |
| 14 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 15 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Nov 2024 |
| 16 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 17 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2024 |
| 18 | Stivers Inc | Graham, TX 76450 | Oil & Gas Operator | May 2003 |
| 19 | Topaz Oil & Gas Inc | Fort Collins, CO 80627 | Gas Operator | Nov 2019 |
| 20 | Wbi Energy Transmission, Inc. | Glendive, MT 59330-0131 | Gas Operator | Nov 1999 |
| 21 | Wbi Production, Inc. | Glendive, MT 59330-0131 | Gas Operator | Mar 2001 |
| 22 | Xeno, Inc | Calgary, AB T2P 2S5 | Gas Operator | Dec 2001 |