| 1 | 801 LLC | Artesia, NM 88211 | Oil & Gas Operator | Oct 2023 |
| 2 | A.O.E. Operators, Inc. | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2025 |
| 3 | Ac Exploration, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 4 | Acock Engineering & Assoc., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2002 |
| 5 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Apr 2025 |
| 6 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 7 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 8 | Anderson Oil Corporation | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Nov 1999 |
| 9 | Anderson Oil LTD. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 10 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 11 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 12 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 13 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 14 | Atoka Operating, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2025 |
| 15 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Apr 2025 |
| 16 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 17 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 18 | Beehive Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 19 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 20 | Bill Hill Oil & Gas, Inc. | Kilgore, TX 75663 | Oil Operator | Apr 2019 |
| 21 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 22 | Blue Ridge Group, Inc. | Bowling Green, KY 42101 | Oil & Gas Operator | Dec 2023 |
| 23 | Bowles Energy, Inc. | Longview, TX 75601 | Oil & Gas Operator | Apr 2025 |
| 24 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 25 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 26 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2025 |
| 27 | Brammer-Keystone Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 28 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2025 |
| 29 | Brookston Energy, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Apr 2025 |
| 30 | Brothers Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jan 2004 |
| 31 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 32 | Buckeye Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2018 |
| 33 | Buckhorn Operating LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Apr 2025 |
| 34 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 35 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 36 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 37 | C & C Petroleum Management, LLC | Abilene, TX 79601 | Oil & Gas Operator | Apr 2025 |
| 38 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Apr 2025 |
| 39 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Apr 2025 |
| 40 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 41 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Apr 2025 |
| 42 | Center Start, LC | Kilgore, TX 75663 | Oil & Gas Operator | May 2008 |
| 43 | CG Operating, Inc. | Austin, TX 78759 | Oil & Gas Operator | Apr 2025 |
| 44 | Chateau Oil And Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2017 |
| 45 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 46 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2024 |
| 47 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 48 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 49 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 50 | Coert Holdings 1 LLC | Greenwich, CT 06830 | Oil & Gas Operator | Dec 2021 |
| 51 | Common Resources L.L.C. | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 52 | Commonwealth Resources, LLC | Fort Collins, CO 80524 | Oil Operator | Dec 2008 |
| 53 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 54 | Conquest Energy, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2025 |
| 55 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 56 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Apr 2025 |
| 57 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Apr 2025 |
| 58 | Cornerstone Oil Trust | San Antonio, TX 78251 | Oil & Gas Operator | Jul 2003 |
| 59 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 60 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 61 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2025 |
| 62 | CRD Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2021 |
| 63 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 64 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2025 |
| 65 | D & W Trucking Company | De Berry, TX 75639 | Oil Operator | Mar 2003 |
| 66 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Apr 2025 |
| 67 | Dale Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 68 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 69 | Denton Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Apr 2025 |
| 70 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 71 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 72 | Dual Production Partners, LLC | Nacogdoches, TX 75963 | Oil & Gas Operator | Apr 2025 |
| 73 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 74 | Ebs Oil & Gas Partners Op.Co.,LP | Dallas, TX 75219 | Oil & Gas Operator | May 2006 |
| 75 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 76 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 77 | Elison Oil & Gas, Inc. | Montgomery, TX 77356 | Oil & Gas Operator | Oct 1999 |
| 78 | Ellora Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 79 | Ellora Operating, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2011 |
| 80 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 81 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 82 | Endeavor Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2015 |
| 83 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 84 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
| 85 | Energy Transfer Crude Marketing LLC | Houston, TX 77002 | Oil Operator | Jan 2025 |
| 86 | Enerquest Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 87 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 88 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 89 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 90 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 91 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 92 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Apr 2025 |
| 93 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 94 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 95 | Falco S & D, Inc. | Shreveport, LA 71107 | Oil & Gas Operator | Apr 1998 |
| 96 | Faulconer Energy, LLC | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 97 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | Feb 2025 |
| 98 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 99 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Apr 2025 |
| 100 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |