| 1 | 4a Oilfield Enterprises, LLC | Longview, TX 75602 | Oil & Gas Operator | Jan 2024 |
| 2 | 84 Energy LLC | Sugar Land, TX 77487 | Oil & Gas Operator | Jul 2025 |
| 3 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 4 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 5 | Ames Financial, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 6 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 7 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 8 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 9 | Arena Resources LLC | Longview, TX 75608 | Oil & Gas Operator | May 2025 |
| 10 | Ark-La-Tex Energy Partners, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2013 |
| 11 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 12 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 13 | Avian Tech International, Inc. | Euless, TX 76040 | Oil & Gas Operator | Apr 1995 |
| 14 | Bachtell Oil & Gas, LTD. | Longview, TX 75605 | Oil & Gas Operator | Jul 2025 |
| 15 | Bachtell, Charles Ray | Longview, TX 75605 | Oil & Gas Operator | Feb 2004 |
| 16 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Jul 2025 |
| 17 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 18 | Black Bayou Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 19 | Boss Operating LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 20 | Bowles Properties, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 1998 |
| 21 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 22 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Jul 2025 |
| 23 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 24 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 25 | Brooks Oil Company | Kilgore, TX 75662 | Oil & Gas Operator | Jul 2025 |
| 26 | Brooks Petroleum Company | Tyler, TX 75703 | Oil & Gas Operator | Jul 2025 |
| 27 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 28 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 29 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 30 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 31 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 32 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 33 | C & F Energy, Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 1996 |
| 34 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Jul 2025 |
| 35 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jul 2025 |
| 36 | Card Operating Company, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 1995 |
| 37 | Caruthers Producing Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2019 |
| 38 | Cavilla Energy, Inc. | Longview, TX 75606 | Oil Operator | Jul 2025 |
| 39 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2025 |
| 40 | Chalker Energy Management II,LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 41 | Chalker Energy Management,LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2006 |
| 42 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Jul 2025 |
| 43 | Chaparral Operating, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Jul 2025 |
| 44 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 45 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 46 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 47 | Cody Energy LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2020 |
| 48 | Cody Energy, Inc. | Houston, TX 77077 | Oil & Gas Operator | May 2025 |
| 49 | Cody Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Sep 2002 |
| 50 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 51 | Cook Exploration Co. | Longview, TX 75602 | Oil & Gas Operator | Jul 2025 |
| 52 | Corsa Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 53 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 54 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Jul 2025 |
| 55 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 56 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 57 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 58 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 59 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 60 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Jul 2025 |
| 61 | Double Eagle Oil Co. | Marshall, TX 75670 | Oil & Gas Operator | Jan 2002 |
| 62 | Duncan Oil Inc | Denver, CO 80210 | Oil & Gas Operator | Jun 2016 |
| 63 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 64 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 65 | Energyquest Management, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2021 |
| 66 | Enerquest Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 67 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 68 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 69 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 70 | Etopsi Oil And Gas, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 71 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 72 | Exco Production Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2009 |
| 73 | Executive Production, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Jul 2025 |
| 74 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 75 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 76 | Fair Oil, LC | Tyler, TX 75710 | Oil & Gas Operator | Oct 2001 |
| 77 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Jul 2025 |
| 78 | Farrington, Walter L., Jr. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2002 |
| 79 | Faulconer Energy, LLC | Tyler, TX 75711 | Oil & Gas Operator | Jul 2025 |
| 80 | Fitzgerald Production Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2024 |
| 81 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 82 | Fossil Energy Inc | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 83 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | May 2025 |
| 84 | Ful-Hill Oil & Gas, Inc. | Marshall, TX 75670 | Oil & Gas Operator | Aug 2003 |
| 85 | Ful-Hill Oil & Gas, L.L.P. | Overton, TX 75684 | Oil & Gas Operator | Jun 2016 |
| 86 | Gaines Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 87 | Gasper Rice Resources, LTD. | Houston, TX 77068 | Oil & Gas Operator | Jul 2025 |
| 88 | Gemini Exploration Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | May 2013 |
| 89 | GMX Resources, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2014 |
| 90 | Goldco Operating LLC | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 91 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 92 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 93 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 94 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Jul 2025 |
| 95 | Graystone Energy Corporation | Judson, TX 75660 | Oil & Gas Operator | Jul 2025 |
| 96 | Harman Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2007 |
| 97 | Hart & McFarland | Vivian, LA 71082 | Oil & Gas Operator | Jul 2025 |
| 98 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Jul 2025 |
| 99 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 100 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jul 2025 |