| 1 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2025 |
| 2 | Ajax Oil Company | Billings, MT 59103 | Oil & Gas Operator | Dec 2003 |
| 3 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 4 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 5 | Armstrong Operating, Inc. | Dickinson, ND 58602 | Oil & Gas Operator | Feb 2025 |
| 6 | Assiniboine & Sioux Tribes | | Oil & Gas Operator | Mar 1997 |
| 7 | Ballard Petroleum Holdings LLC | Billings, MT 59104 | Oil & Gas Operator | Feb 2025 |
| 8 | BBX Operating Co. LLC | Austin, TX 78738 | Oil & Gas Operator | Jan 2025 |
| 9 | Berco Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 10 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Mar 2025 |
| 11 | Bill Barrett Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 12 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 13 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 14 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Apr 2025 |
| 15 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2025 |
| 16 | Charger Resources, LLC | Hurst, TX 76054 | Oil & Gas Operator | Aug 2015 |
| 17 | Choctaw II Oil & Gas, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 18 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 19 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 20 | Columbus Energy, LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 21 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2025 |
| 22 | Crown Oil, Inc. | Houston, TX 77002 | Oil Operator | Jan 1999 |
| 23 | CWT Operating, LLC | McKinney, TX 75072 | Oil & Gas Operator | Feb 2025 |
| 24 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Apr 2025 |
| 25 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Apr 2025 |
| 26 | Devon Energy Williston, L.L.C. | Oklahoma City, OK 73102-8260 | Oil & Gas Operator | Feb 2025 |
| 27 | Digital Operating Company LLC | Boerne, TX 78006 | Oil & Gas Operator | Apr 2025 |
| 28 | Dominion Oklahoma Texas Exploration & Production | Houston, TX 77060 | Oil & Gas Operator | Dec 2006 |
| 29 | Drawings, LLC | Albuquerque, NM 87109 | Oil Operator | Jan 2025 |
| 30 | Eagle Operating Inc | Minot, ND 58701 | Oil & Gas Operator | Feb 2025 |
| 31 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 32 | Energy Equity Company | Columbus, MT 59019 | Oil & Gas Operator | Feb 2025 |
| 33 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 34 | Equinor Energy LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2021 |
| 35 | Equitable Resources Energy Co, Western Region | Billings, MT 59102 | Oil & Gas Operator | May 1997 |
| 36 | FH Petroleum Corp. | Billings, MT 59103 | Oil & Gas Operator | Feb 2025 |
| 37 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Apr 2025 |
| 38 | Flying J Oil & Gas Inc | North Salt Lake, UT 84054 | Oil & Gas Operator | Dec 2009 |
| 39 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2025 |
| 40 | Genesis St Operating LLC | Kansas City, MO 64108 | Oil & Gas Operator | Apr 2025 |
| 41 | Granite Creek Energy LLC | Cody, WY 82414 | Oil & Gas Operator | Feb 2025 |
| 42 | Green Valley Operating, LLC | Billings, MT 59108 | Oil & Gas Operator | Feb 2025 |
| 43 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2025 |
| 44 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 45 | Helis Oil & Gas Company, L.L.C. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2023 |
| 46 | HRC Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2017 |
| 47 | Huntington Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2006 |
| 48 | Intermountain Operating, Inc. | Billings, MT 59103 | Oil & Gas Operator | Jul 2001 |
| 49 | Intoil, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Dec 2002 |
| 50 | JN Expl & Prod LTD Partnership | Billings, MT 59103-0159 | Oil & Gas Operator | Feb 2001 |
| 51 | Journey Operating, L.L.C. | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 52 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2025 |
| 53 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 54 | Kraken Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 55 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Apr 2025 |
| 56 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 57 | Missouri Basin Well Service, Inc. | Belfield, ND 58622 | Oil & Gas Operator | Jan 2018 |
| 58 | Missouri River Royalty Corporation | Bismarck, ND 58504 | Oil & Gas Operator | Feb 2025 |
| 59 | Murphy Exploration & Prod. Co. | Houston, TX 77094 | Oil & Gas Operator | Jun 2011 |
| 60 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 61 | Nautilus Poplar LLC | Poplar, MT 59255 | Oil Operator | Feb 2025 |
| 62 | Nerdlihc Company, Inc. | Long Beach, CA 90815 | Oil & Gas Operator | Nov 2006 |
| 63 | Nielco, Inc. | Billings, MT 59103 | Oil & Gas Operator | Apr 2002 |
| 64 | Northern Oil Production, Inc. | Bozeman, MT 59718 | Oil & Gas Operator | Feb 2025 |
| 65 | Oasis Petroleum North America LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 66 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 67 | Phoenix Operating LLC | Denver, CO 80237 | Oil & Gas Operator | Mar 2025 |
| 68 | Pintail Petroleum Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2010 |
| 69 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 70 | Pittencrieff America Inc | Abilene, TX 79608 | Oil & Gas Operator | Feb 2003 |
| 71 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2025 |
| 72 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Feb 2025 |
| 73 | Ridge Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 74 | Ritter, Laber & Associates, Inc. | Williston, ND 58802 | Oil & Gas Operator | Oct 2024 |
| 75 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 76 | Samson Oil & Gas USA Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 77 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 78 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 79 | Sinclair Oil & Gas Company | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Apr 2025 |
| 80 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 81 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 82 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 83 | Stearns Oil Company LLC | Willison, ND 58801 | Oil & Gas Operator | Feb 2025 |
| 84 | Stratex Oil And Gas, Inc. | Watertown, CT 06795 | Oil & Gas Operator | Jun 2016 |
| 85 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 86 | Terrol Energy, Inc. | Hygiene, CO 80533 | Oil & Gas Operator | Dec 2006 |
| 87 | Tipperary Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 88 | True Oil LLC | Casper, WY 82602 | Oil & Gas Operator | Feb 2025 |
| 89 | Vecta Oil & Gas LTD | Dallas, TX 75235 | Oil & Gas Operator | Feb 2025 |
| 90 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 91 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Apr 2025 |
| 92 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 93 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 94 | Williston Industrial Supply Corporation | Williston, ND 58801 | Oil & Gas Operator | Mar 2012 |
| 95 | Wyoming Resources Corporation | Rapid City, SD 57702 | Oil & Gas Operator | Oct 2018 |
| 96 | Xoil Inc | Aurora, CO 80016 | Oil & Gas Operator | Jul 2023 |
| 97 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 98 | Zenergy Operating Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2016 |