| 1 | A & B Oil | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 2 | A & G Oil Company, LLC | Barstow, TX 79719 | Oil & Gas Operator | Feb 2012 |
| 3 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 4 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 5 | Accell Natural Gas Company | Houston, TX 77042 | Oil & Gas Operator | Sep 1998 |
| 6 | Acoma Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Oct 2025 |
| 7 | Acorn Oil & Gas, LLC | Iraan, TX 79744 | Oil & Gas Operator | Oct 2025 |
| 8 | Adgo Resources LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2018 |
| 9 | Aec Operating Company | Roswell, NM 88202 | Oil & Gas Operator | Sep 2006 |
| 10 | Aegis Fluids Management, LLC | Plano, TX 75093 | Oil & Gas Operator | Oct 2025 |
| 11 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 12 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | May 2025 |
| 13 | Aikman Oil Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | Oct 2025 |
| 14 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Oct 2025 |
| 15 | Alleder Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 16 | Alpine Gas Company, LLC | Dallas, TX 75201 | Oil & Gas Operator | Oct 2006 |
| 17 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 18 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 19 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 20 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 21 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 22 | American Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | Oct 2025 |
| 23 | American Royalty | Caldwell, TX 77836 | Oil & Gas Operator | Oct 2005 |
| 24 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 25 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 26 | Amron Petroleum, Inc. | Midland, TX 79708 | Oil & Gas Operator | Jan 1996 |
| 27 | Amtex Energy, Inc. | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2025 |
| 28 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 29 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 30 | Approach Operating LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Sep 2020 |
| 31 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Oct 2025 |
| 32 | Apx & Assoc. | FT Stockton, TX 79735 | Oil & Gas Operator | Sep 1998 |
| 33 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Oct 2025 |
| 34 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 35 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 36 | Argee Oil Company | Midland, TX 79702 | Gas Operator | May 1994 |
| 37 | Argus Drilling, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 38 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 39 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2010 |
| 40 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 41 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 42 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 43 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 44 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Oct 2025 |
| 45 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 46 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 47 | Atlantic Resources Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 48 | Atoka Operating, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Oct 2025 |
| 49 | Atropos Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 50 | Atropos Production Corporation | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 51 | Aurivos LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 52 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Oct 2025 |
| 53 | Awp Operating Company | George West, TX 78022 | Oil & Gas Operator | Oct 2025 |
| 54 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |