| 1 | Ableready, Inc. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 2 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 3 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 4 | Bass Operating Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 1999 |
| 5 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 6 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 7 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 8 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 9 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 10 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 11 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 12 | Delta Exploration Company Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 13 | Dry Fork Production Co., LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 14 | Dynamic Production, Inc. | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2024 |
| 15 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 16 | Enre Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2005 |
| 17 | Esco Oil Operating Company LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 18 | Exmoor Oil & Minerals Corp. | Dallas, TX 75225 | Oil & Gas Operator | May 1994 |
| 19 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 20 | Gilmore Oil & Gas | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 21 | Gregco, Inc. | Paducah, TX 79248 | Oil & Gas Operator | May 1999 |
| 22 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 23 | Hamilton Brothers | Plainview, TX 79073 | Oil & Gas Operator | Mar 2008 |
| 24 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 25 | Laloc | Aspermont, TX 79502 | Oil & Gas Operator | Apr 2024 |
| 26 | Matador Operating, LLC | Lubbock, TX 79413 | Oil Operator | Apr 2024 |
| 27 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Apr 2024 |
| 28 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 29 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 30 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 31 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 32 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 33 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 34 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 35 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 36 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 37 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 38 | Petrolia Group, L.L.C. | Katy, TX 77449 | Oil & Gas Operator | Apr 2024 |
| 39 | Petrotex, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 40 | Probe Offshore, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 41 | Regent Oil & Gas Company, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2006 |
| 42 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Apr 2024 |
| 43 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 44 | Ridglea Energy I, LLC | Spring, TX 77379 | Oil & Gas Operator | Apr 2024 |
| 45 | Roaring Springs Energy, LTD. | Midland, TX 79702 | Oil & Gas Operator | Feb 2010 |
| 46 | Rogers, S. K. Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 47 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 48 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 49 | Sharp Image Energy, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2024 |
| 50 | Southstone Energy, LLC | Austin, TX 78735 | Oil Operator | Apr 2024 |
| 51 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jul 2021 |
| 52 | Sutherland Energy Co., LLC | Bridgeport, TX 76426 | Oil & Gas Operator | Apr 2024 |
| 53 | Tascosa Petroleum Corporation | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2024 |
| 54 | Texoma Oil Tools, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 55 | Tracer Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 56 | Tyner Texas Operating Company | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 57 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Dec 2023 |
| 58 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2023 |
| 59 | Walsh, F H Jr. Operating Co. Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2019 |
| 60 | Walsh, F. Howard, Jr. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 1994 |
| 61 | West Texas Royalties, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 62 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 63 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 64 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Apr 2024 |