| 1 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 2 | Arsenal Energy USA Inc. | | Oil & Gas Operator | Aug 2016 |
| 3 | Brent Exploration Inc. | | Oil & Gas Operator | Apr 1983 |
| 4 | Cenex | | Oil & Gas Operator | Dec 1996 |
| 5 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 6 | Depco, Inc. & Texas Pacific Oil Co. | | Oil Operator | Jul 1995 |
| 7 | Eagle Operating Inc | Minot, ND 58701 | Oil & Gas Operator | Aug 2025 |
| 8 | Earl Schwartz Co. | | Oil & Gas Operator | Oct 1989 |
| 9 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
| 10 | Flying J Oil & Gas Inc | North Salt Lake, UT 84054 | Oil & Gas Operator | Dec 2009 |
| 11 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 12 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | Aug 2025 |
| 13 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 14 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Oct 2025 |
| 15 | Hunt Energy Corporation | | Oil & Gas Operator | Feb 2002 |
| 16 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 17 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 18 | John B. Hawley, Jr. Trust #1 | | Oil Operator | Apr 1979 |
| 19 | Kissinger Petroleum Corp | | Oil & Gas Operator | Nov 1983 |
| 20 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 21 | Murex Petroleum Corporation | Humble, TX 77347 | Oil & Gas Operator | Aug 2025 |
| 22 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 23 | Nexen Oil And Gas U.S.A. Inc. | Calgary, AB T2P 5C1 | Oil & Gas Operator | Feb 2010 |
| 24 | Panther Creek Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2012 |
| 25 | Phillip D. Armstrong | | Oil & Gas Operator | Sep 2018 |
| 26 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Aug 2025 |
| 27 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Oct 2025 |
| 28 | Ritter, Laber & Associates, Inc. | Williston, ND 58802 | Oil & Gas Operator | May 2025 |
| 29 | Ryan Exploration, Inc. | | Oil & Gas Operator | Mar 2012 |
| 30 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 31 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 32 | Timberline Production Company LLC | Casper, WY 82601 | Oil & Gas Operator | Oct 2020 |
| 33 | Titan Energy, LLC | | Oil & Gas Operator | Aug 2025 |
| 34 | Ward-Williston Company | | Oil & Gas Operator | Apr 2014 |
| 35 | Wesco Operating, Inc. | Casper, WY 82602 | Oil & Gas Operator | Aug 2025 |
| 36 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 37 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |