| 1 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2024 |
| 2 | American Eagle Energy Corporation | | Oil & Gas Operator | Oct 2015 |
| 3 | Armstrong Operating, Inc. | Dickinson, ND 58602 | Oil & Gas Operator | Feb 2024 |
| 4 | Bakken Hunter, LLC | | Oil & Gas Operator | Jun 2017 |
| 5 | Basic Earth Science Systems, Inc. | Austin, TX 78714 | Oil & Gas Operator | Apr 2010 |
| 6 | Baytex Energy USA LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2014 |
| 7 | Baytex Energy USA LTD | | Oil & Gas Operator | Sep 2014 |
| 8 | Berco Resources LLC | Denver, CO 80206 | Oil & Gas Operator | Sep 2009 |
| 9 | Bill Barrett Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 10 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 11 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 12 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Apr 2024 |
| 13 | Camwest II LP | McKinney, TX 75070 | Oil & Gas Operator | Jul 2007 |
| 14 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 15 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 16 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 17 | Condor Petroleum, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 18 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 19 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 20 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 21 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2024 |
| 22 | Crescent Point Energy Us Corp | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 23 | D90 Energy, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 24 | Dakota Crude, Inc. | | Oil & Gas Operator | Feb 2024 |
| 25 | David H Arrington Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Mar 2024 |
| 26 | Eagle Operating Inc | Minot, ND 58701 | Oil & Gas Operator | Feb 2024 |
| 27 | Earthstone Energy, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2017 |
| 28 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 29 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2024 |
| 30 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
| 31 | Flying J Oil & Gas Inc | North Salt Lake, UT 84054 | Oil & Gas Operator | Dec 2009 |
| 32 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 33 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 34 | Four Starr Production, LLC | Dallas, TX 75243 | Oil & Gas Operator | Apr 2024 |
| 35 | Galaxy Oil | | Oil & Gas Operator | Feb 2024 |
| 36 | Galaxy Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2015 |
| 37 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | Feb 2024 |
| 38 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 39 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 40 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 41 | Imperial Oil Of North Dakota, Inc. | | Oil & Gas Operator | Jul 2023 |
| 42 | Intoil, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Dec 2002 |
| 43 | Jayhawk Energy Inc. | Spokane, WA 99202 | Oil & Gas Operator | May 2016 |
| 44 | Jed Oil USA Inc | | Oil & Gas Operator | Dec 2008 |
| 45 | Jettison, Inc. | | Oil & Gas Operator | Mar 2024 |
| 46 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2024 |
| 47 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2023 |
| 48 | Koda Resources Operating, LLC | | Oil & Gas Operator | Feb 2024 |
| 49 | Kodiak Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2020 |
| 50 | Lear Petroleum Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 51 | Leland Oil & Gas, LLC | | Oil & Gas Operator | Feb 2024 |
| 52 | Liberty Resources Management Co LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 53 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 54 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 55 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 56 | Marsha Azar | | Oil & Gas Operator | Jan 2017 |
| 57 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 58 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2024 |
| 59 | Mountain Divide, LLC | | Oil & Gas Operator | Mar 2017 |
| 60 | Murex Petroleum Corporation | Humble, TX 77347 | Oil & Gas Operator | Feb 2024 |
| 61 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 62 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 63 | Newfield Production Company | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Jul 2022 |
| 64 | North Plains Energy, LLC | | Oil & Gas Operator | Jan 2016 |
| 65 | Oasis Petroleum North America LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 66 | Omimex International Corporation | Fort Worth, TX 76103-2300 | Oil & Gas Operator | Jan 2024 |
| 67 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 68 | Patrick Petroleum Co. | Jackson, MI 49201 | Oil & Gas Operator | Nov 1993 |
| 69 | Petro Harvester Operating Company, LLC | | Oil & Gas Operator | Nov 2022 |
| 70 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 71 | Phillips & Ralph M. Ballard | | Oil Operator | Jan 1960 |
| 72 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 73 | Phoenix Petroleum, LLC | | Oil & Gas Operator | Feb 2024 |
| 74 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Mar 2024 |
| 75 | Primewest Petroleum Inc. | Centennial, CO 80111 | Oil & Gas Operator | Jan 2009 |
| 76 | Prospective Investment & Trading Co., LTD., The | Tulsa, OK 74170-2320 | Oil & Gas Operator | Apr 2014 |
| 77 | Proven Petroleum, Inc. | Lakewood, CO 80228 | Oil & Gas Operator | Mar 2024 |
| 78 | RDT Properties, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2012 |
| 79 | Resource Energy Can-Am LLC | | Oil & Gas Operator | May 2022 |
| 80 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Apr 2024 |
| 81 | Ritter, Laber & Associates, Inc. | Williston, ND 58802 | Oil & Gas Operator | Jan 2024 |
| 82 | Rocanville Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 83 | Samson Oil & Gas USA Inc | Denver, CO 80202 | Oil & Gas Operator | Mar 2024 |
| 84 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 85 | Sequel Energy, LLC | | Oil & Gas Operator | May 2014 |
| 86 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Jan 2024 |
| 87 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 88 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 89 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 90 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 91 | Stearns Oil Company LLC | Willison, ND 58801 | Oil & Gas Operator | Feb 2024 |
| 92 | Stone Energy Corporation | Denver, CO 80202-2828 | Oil & Gas Operator | Oct 2014 |
| 93 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 94 | Taqa USA, Inc. | Centennial, CO 80111 | Oil & Gas Operator | Jul 2020 |
| 95 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 96 | Valkyrie Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2024 |
| 97 | Vast Operations, LLC | | Oil Operator | Mar 2024 |
| 98 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Apr 2024 |
| 99 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 100 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Feb 2024 |