| 1 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Nov 2024 |
| 2 | Alturas Energy, LLC | Sidney, MT 59270 | Oil Operator | Mar 2022 |
| 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 | Apex Energy, L.L.C. | Tulsa, OK 74114 | Oil & Gas Operator | Aug 2024 |
| 6 | Armstrong Operating, Inc. | Dickinson, ND 58602 | Oil & Gas Operator | Sep 2024 |
| 7 | Basic Earth Science Systems, Inc. | Austin, TX 78714 | Oil & Gas Operator | Apr 2010 |
| 8 | Bensun Energy, LLC | Grandview, TX 76050 | Oil Operator | Aug 2020 |
| 9 | Berco Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 10 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Sep 2024 |
| 11 | Bill Barrett Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 12 | Black Hawk Resources, LLC | Bowman, ND 58623 | Oil & Gas Operator | Jun 2011 |
| 13 | Blackjack Oil, Inc. | Las Vegas, NV 89128 | Oil & Gas Operator | Nov 2019 |
| 14 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 15 | Brooks Exploration, Inc. | Denver, CO 80293 | Oil & Gas Operator | Mar 2001 |
| 16 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Nov 2024 |
| 17 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Sep 2024 |
| 18 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2024 |
| 19 | Charger Resources, LLC | Hurst, TX 76054 | Oil & Gas Operator | Aug 2015 |
| 20 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2024 |
| 21 | Choctaw II Oil & Gas, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 22 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Nov 2024 |
| 23 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 24 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 25 | Columbus Energy, LLC | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 26 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Nov 2024 |
| 27 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 28 | Cowry Enterprises, LTD. | Littleton, CO 80161-3310 | Oil & Gas Operator | Mar 2022 |
| 29 | Crown Oil, Inc. | Houston, TX 77002 | Oil Operator | Jan 1999 |
| 30 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 31 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Nov 2024 |
| 32 | Diamond Halo Group LLC | Grandview, TX 76050 | Oil Operator | May 2024 |
| 33 | Digital Operating Company LLC | Boerne, TX 78006 | Oil & Gas Operator | Nov 2024 |
| 34 | Dominion Oklahoma Texas Exploration & Production | Houston, TX 77060 | Oil & Gas Operator | Dec 2006 |
| 35 | Eagle Operating Inc | Minot, ND 58701 | Oil & Gas Operator | Sep 2024 |
| 36 | Earthstone Energy, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2017 |
| 37 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2024 |
| 38 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Nov 2024 |
| 39 | Emep Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2024 |
| 40 | Empire North Dakota LLC | Tulsa, OK 74114 | Oil & Gas Operator | Sep 2024 |
| 41 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Sep 2024 |
| 42 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Nov 2024 |
| 43 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2024 |
| 44 | Enerplus Resources USA Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 45 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 46 | Equinor Energy LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2021 |
| 47 | Equitable Resources Energy Co, Western Region | Billings, MT 59102 | Oil & Gas Operator | May 1997 |
| 48 | Fidelity Exploration & Production Company | Denver, CO 80203 | Oil & Gas Operator | Oct 2024 |
| 49 | Flying J Oil & Gas Inc | North Salt Lake, UT 84054 | Oil & Gas Operator | Dec 2009 |
| 50 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 51 | Forcenergy Onshore Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 52 | Genesis St Operating LLC | Kansas City, MO 64108 | Oil & Gas Operator | Nov 2024 |
| 53 | Germany Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Oct 2002 |
| 54 | Grayson Mill Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2024 |
| 55 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Sep 2024 |
| 56 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 57 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 58 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 59 | HRC Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2017 |
| 60 | Huntington Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2006 |
| 61 | Intermountain Operating, Inc. | Billings, MT 59103 | Oil & Gas Operator | Jul 2001 |
| 62 | Intoil, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Dec 2002 |
| 63 | JN Expl & Prod LTD Partnership | Billings, MT 59103-0159 | Oil & Gas Operator | Feb 2001 |
| 64 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Nov 2024 |
| 65 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 66 | Kirkwood W C | Casper, WY 82602 | Oil & Gas Operator | May 2005 |
| 67 | Kraken Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2024 |
| 68 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Nov 2024 |
| 69 | Luff Exploration Company | Denver, CO 80203 | Oil & Gas Operator | Sep 2024 |
| 70 | Mach Petroleum, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | Nov 2014 |
| 71 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 72 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Sep 2024 |
| 73 | Mbi Oil & Gas LLC | Dickinson, ND 58601 | Oil & Gas Operator | Sep 2024 |
| 74 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 75 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Nov 2024 |
| 76 | Missouri Basin Well Service, Inc. | Belfield, ND 58622 | Oil & Gas Operator | Jan 2018 |
| 77 | Montana Heartland LLC | Bismarck, ND 58504 | Oil & Gas Operator | Aug 2024 |
| 78 | Morningstar Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |
| 79 | Mountain Pacific General Inc. | Cut Bank, MT 59427 | Oil & Gas Operator | Jun 2022 |
| 80 | Murex Petroleum Corporation | Humble, TX 77347 | Oil & Gas Operator | Sep 2024 |
| 81 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 82 | Navasota Resources LTD. | | Oil & Gas Operator | Sep 2002 |
| 83 | Newfield Production Company | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Jul 2022 |
| 84 | Northern Oil Production, Inc. | Bozeman, MT 59718 | Oil & Gas Operator | Sep 2024 |
| 85 | Oasis Petroleum North America LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2024 |
| 86 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 87 | Orion Energy Partners LP | Denver, CO 80202 | Oil & Gas Operator | Aug 2024 |
| 88 | Panther Creek Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2012 |
| 89 | Panther Energy Company, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2022 |
| 90 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 91 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2024 |
| 92 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2024 |
| 93 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Sep 2024 |
| 94 | Ramhorn Energy, LLC | Green River, WY 82935 | Oil & Gas Operator | Aug 2024 |
| 95 | Ridge Energy | McKinney, TX 75070 | Oil & Gas Operator | Sep 2024 |
| 96 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Nov 2024 |
| 97 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Aug 2024 |
| 98 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 99 | Samson Oil & Gas USA Inc | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 100 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2024 |