| 1 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 2 | Banks Oil Co | | Oil & Gas Operator | Jun 2025 |
| 3 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Jun 2025 |
| 4 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 5 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 6 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Aug 2025 |
| 7 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Jun 2025 |
| 8 | Holcomb Oil Comp | | Oil Operator | Sep 1991 |
| 9 | Horseshoe Operating Inc | Midland, TX 79701 | Oil & Gas Operator | Jan 2023 |
| 10 | Koch Exploration Company | Houston, TX 77046 | Oil & Gas Operator | Apr 2003 |
| 11 | Marathon Oil Co.-Rocky Mountain Region | Cody, WY 82414 | Oil Operator | Dec 1999 |
| 12 | Marathon Oil Com | | Oil & Gas Operator | Dec 1996 |
| 13 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Aug 2025 |
| 14 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 15 | McGinness Oil Company Of Kansas, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Nov 2019 |
| 16 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 17 | Nadel And Gussman, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 18 | Pelican Hill Oil & Gas Inc | Carlsbad, CA 92010 | Oil & Gas Operator | May 2013 |
| 19 | Pet-Ex, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 20 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 21 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 22 | Phillips Exploration Company L.C. | Andover, KS 67002 | Oil & Gas Operator | Jun 2025 |
| 23 | Quinque Operating Company | Liberal, KS 67905 | Oil & Gas Operator | Jun 2025 |
| 24 | Raven Resources LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Jun 2025 |
| 25 | Red Oak Energy, Inc. | Wichita, KS 67207 | Oil & Gas Operator | Jun 2025 |
| 26 | Ritchie, A. Scott | Wichita, KS 67202 | Oil Operator | Mar 1988 |
| 27 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 28 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 29 | Star Resources, LTD. | Wichita, KS 67202 | Oil Operator | Nov 2002 |
| 30 | Trans-Western Operating Company | Golden, CO 80402 | Oil Operator | Jun 2025 |
| 31 | Union Pacific Re | | Oil & Gas Operator | Dec 1996 |
| 32 | Union Pacific Resour | | Oil & Gas Operator | Apr 2002 |