| 1 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 2 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jan 2025 |
| 3 | Aoco Operating Company, L.L.C. | Houston, TX 77008 | Oil & Gas Operator | Feb 2005 |
| 4 | Aoco Operating, L.P. | Houston, TX 77008 | Oil & Gas Operator | Mar 2008 |
| 5 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 6 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 7 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 8 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 9 | B & S Salvage | Post, TX 79356 | Oil & Gas Operator | Mar 2025 |
| 10 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 11 | Bennett, R. C., Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 12 | Boone & Moore Oil Co. | Lubbock, TX 79453 | Oil & Gas Operator | Mar 1995 |
| 13 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 14 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 15 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 16 | C Bar Petroleum Company | Lubbock, TX 79413 | Oil & Gas Operator | May 2018 |
| 17 | Caprock, Inc. | Ralls, TX 79357 | Oil & Gas Operator | Mar 2013 |
| 18 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 19 | Church Ranch, LLC | Lubbock, TX 79423 | Oil Operator | Mar 2025 |
| 20 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 21 | Collier, W. D. Ranch | Post, TX 79356 | Oil & Gas Operator | Jan 2012 |
| 22 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 23 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 24 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Mar 2025 |
| 25 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |
| 26 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 27 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2014 |
| 28 | Duncan Drilling Co. | Big Spring, TX 79721 | Oil & Gas Operator | Mar 2025 |
| 29 | Energy Transfer Crude Marketing LLC | Houston, TX 77002 | Oil Operator | Dec 2024 |
| 30 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Mar 2025 |
| 31 | G.P.C. Oil And Gas Corporation | Midland, TX 79710 | Oil & Gas Operator | Feb 1993 |
| 32 | Gungoll, Carl E. Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 33 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 34 | Hall Energy Company LLC | Oklahoma City, OK 73120-5020 | Oil & Gas Operator | Jul 2022 |
| 35 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2024 |
| 36 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Mar 2025 |
| 37 | Hammer Oil Company | Post, TX 79356 | Oil & Gas Operator | Jun 2002 |
| 38 | Harbor Petroleum, LLC | Granbury, TX 76049 | Oil & Gas Operator | Mar 2025 |
| 39 | Harmony Drilling Company, Inc. | Denver, CO 80222 | Oil & Gas Operator | Nov 2016 |
| 40 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 41 | JD Oil Company | Longview, TX 75605 | Oil & Gas Operator | Sep 2014 |
| 42 | Juno Operating Company II LLC | Plano, TX 75093 | Oil & Gas Operator | Sep 2018 |
| 43 | Juno Operating Company III, LLC | Plano, TX 75093 | Oil & Gas Operator | Mar 2025 |
| 44 | Juno Operating Company, LLC | Plano, TX 75093 | Oil & Gas Operator | Jul 2011 |
| 45 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 46 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 47 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 48 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | Mar 2025 |
| 49 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 50 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 51 | Miltex Oil Company | Boerne, TX 78006 | Oil & Gas Operator | Mar 2025 |
| 52 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 53 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 54 | New Atlantis Oil & Expl., LLC | Big Spring, TX 79721 | Oil & Gas Operator | Feb 2012 |
| 55 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 56 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
| 57 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 58 | P & R Oil Company | Post, TX 79356 | Oil & Gas Operator | Mar 2025 |
| 59 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 60 | Phillips 66 Company | Bartlesville, OK 74004 | Oil & Gas Operator | Aug 1997 |
| 61 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 62 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 63 | Qualia, C. F. Operating,Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2013 |
| 64 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 65 | Reflection Energy Search, Inc | Midland, TX 79702 | Oil Operator | Feb 2006 |
| 66 | Rittenhouse Oil & Gas Co. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 67 | RJD Management Co., Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2025 |
| 68 | Sand Creek Oil Co., Inc. | Lubbock, TX 79413 | Oil & Gas Operator | Jul 2012 |
| 69 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 70 | Seaboard Oil Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2008 |
| 71 | Sharp Image Energy, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Mar 2025 |
| 72 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2024 |
| 73 | Sierra Lima Oil & Gas, LLC | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 74 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 75 | Socorro Exploration, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Mar 2025 |
| 76 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2025 |
| 77 | Stelzer Drilling Co. Inc. | Post, TX 79356 | Oil Operator | Mar 2025 |
| 78 | Stelzer, J. C. | Post, TX 79356 | Oil & Gas Operator | Dec 1995 |
| 79 | Strawn Energy Services, LLC | Lubbock, TX 79404 | Oil Operator | Mar 2025 |
| 80 | Surge Operating, LLC | Houston, TX 77041 | Oil & Gas Operator | Mar 2025 |
| 81 | T-Bar-X Limited Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2005 |
| 82 | Texas Secondary Oil Corporation | Devine, TX 78016 | Oil & Gas Operator | Mar 2025 |
| 83 | Texland Petroleum Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2003 |
| 84 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2025 |
| 85 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 86 | Thorp Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Feb 2014 |
| 87 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 88 | Tonto Petroleum Corporation | Post, TX 79356 | Oil & Gas Operator | Jan 2007 |
| 89 | Trinidad Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Mar 2025 |
| 90 | United Company | Lubbock, TX 79408 | Oil & Gas Operator | Jun 1995 |
| 91 | United Energy Corporation | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2025 |
| 92 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 93 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 94 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Mar 2025 |
| 95 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 96 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |