| 1 | 3R-B Oil Venture | Luling, TX 78648 | Oil & Gas Operator | Feb 2012 |
| 2 | 4C Oil, LLC | Cameron, TX 76520 | Oil Operator | Apr 2026 |
| 3 | 94 Operating, LP | Sanger, TX 76266 | Oil Operator | Apr 2026 |
| 4 | Ab Reserve, LLC | Rockdale, TX 76567 | Oil Operator | Apr 2026 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2026 |
| 6 | Acco Oil & Gas Company | Houston, TX 77056 | Oil & Gas Operator | Sep 2001 |
| 7 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Apr 2020 |
| 8 | Ads | Caldwell, TX 77836 | Oil & Gas Operator | Dec 2010 |
| 9 | Ads Oil & Gas, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Apr 2026 |
| 10 | Aim Consultants Inc. | Rockville, MD 20852 | Oil & Gas Operator | Mar 2008 |
| 11 | Allied Operating Texas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 12 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 13 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 14 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 15 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 16 | Arledge, Terry | Rockdale, TX 76567 | Oil & Gas Operator | Sep 2019 |
| 17 | Austin Ridge Energy Corporation | Houston, TX 77224 | Oil & Gas Operator | Apr 2026 |
| 18 | B & B Drilling Co. | Milano, TX 76556 | Oil & Gas Operator | Jul 2015 |
| 19 | B & L Minerals, Inc. | Houston, TX 77036 | Oil & Gas Operator | Aug 2003 |
| 20 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Apr 2026 |
| 21 | Belmar Oil & Gas, Inc. | Milano, TX 76556 | Oil & Gas Operator | Apr 2026 |
| 22 | Bet-Ro, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Apr 2026 |
| 23 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Apr 2026 |
| 24 | Blackwell Drilling Co. | Cameron, TX 76520 | Oil & Gas Operator | Nov 2004 |
| 25 | Boundary Ventures, Inc. | Columbus, TX 78934 | Oil Operator | Apr 2026 |
| 26 | Brazos Geological Consulting LTD. Co. | College Sta, TX 77840 | Oil Operator | Apr 2026 |
| 27 | Britnic Oil & Gas, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Apr 2026 |
| 28 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2026 |
| 29 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 30 | C & P Land Services Limited Liability Company | Los Angeles, CA 90035 | Oil Operator | Apr 2026 |
| 31 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2026 |
| 32 | C-D Oil Company, Inc. | Cameron, TX 76520 | Oil Operator | Apr 2026 |
| 33 | Can'T Complain Operating Co. | Georgetown, TX 78633 | Oil & Gas Operator | Apr 2026 |
| 34 | Cap Operating Inc. | Borger, TX 79008 | Oil & Gas Operator | Apr 2026 |
| 35 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Apr 2026 |
| 36 | Carter, Shirley Oil Co | Round Rock, TX 78665 | Oil & Gas Operator | Jun 2018 |
| 37 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Apr 2026 |
| 38 | Central Plains Oil&Gas Corp. (A) | Bryan, TX 77802 | Oil & Gas Operator | Mar 2003 |
| 39 | Chama Resources | Dallas, TX 75354 | Oil & Gas Operator | Apr 2009 |
| 40 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2026 |
| 41 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 42 | Chisholm Oil Investments | Seabrook, TX 77586 | Oil & Gas Operator | Apr 2026 |
| 43 | Chmelar, Eugene Oil & Gas | Caldwell, TX 77836 | Oil & Gas Operator | Apr 2026 |
| 44 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 45 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 46 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Apr 2026 |
| 47 | Comet Oil & Gas, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Apr 2026 |
| 48 | Comet Production | Conroe, TX 77305 | Oil Operator | Apr 2026 |
| 49 | Crescent Exploration Company | Austin, TX 78767 | Oil & Gas Operator | Aug 1995 |
| 50 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 51 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Apr 2026 |
| 52 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Apr 2026 |
| 53 | D & M Company | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2008 |
| 54 | Dash Production Company, Inc. | Corpus Christ, TX 78411 | Oil & Gas Operator | Apr 2026 |
| 55 | Daystar Operating Company, LLC | Austin, TX 78750 | Oil & Gas Operator | Apr 2008 |
| 56 | Deltex Minerals Inc. | Peachtree Cty, GA 30269 | Oil & Gas Operator | Apr 2026 |
| 57 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 58 | DSW Production Corp. | Houston, TX 77265 | Oil & Gas Operator | Apr 2026 |
| 59 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 60 | E P C Oil & Gas, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Apr 2026 |
| 61 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jan 2026 |
| 62 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2026 |
| 63 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 64 | Ernest Operating Company | Rockdale, TX 76567 | Oil & Gas Operator | Apr 2026 |
| 65 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 66 | Excalibur E & P, LLC | Johnson City, TX 78636 | Oil & Gas Operator | Apr 2026 |
| 67 | Exploration Techniques Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2026 |
| 68 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Apr 2026 |
| 69 | Ferguson-Burns Leasing Co. | Rockdale, TX 76567 | Oil & Gas Operator | Oct 2007 |
| 70 | Four-C Management & Industries | Rockdale, TX 76567 | Oil & Gas Operator | Aug 2008 |
| 71 | Fullspike Energy LLC | Boyd, TX 76023 | Oil & Gas Operator | Apr 2026 |
| 72 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Apr 2026 |
| 73 | Garrison Resource Developmnt LLC | Plainview, TX 79072 | Oil Operator | Apr 2026 |
| 74 | Geostrat Inc. | Addison, TX 75001 | Oil & Gas Operator | Nov 2011 |
| 75 | GGP Exploration, LTD. | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2026 |
| 76 | Ginco Operating Co. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2026 |
| 77 | Glenco Oil & Gas Company | Seguin, TX 78155 | Oil & Gas Operator | Dec 1994 |
| 78 | Goforth Production Company | Rockdale, TX 76567 | Oil Operator | Feb 2014 |
| 79 | Goldmark Energy Corporation | Spring, TX 77393 | Oil & Gas Operator | Jul 2010 |
| 80 | Gsi Oil & Gas, Inc. | Bryan, TX 77806 | Oil & Gas Operator | Apr 2026 |
| 81 | Guin, Don L. | Flint, TX 75762 | Oil & Gas Operator | Apr 2018 |
| 82 | Hall, D. Corporation | La Grange, TX 78945 | Oil & Gas Operator | Mar 2013 |
| 83 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Apr 2026 |
| 84 | Heartland Resources, Inc. | Temple, TX 76501 | Oil & Gas Operator | Mar 2008 |
| 85 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Apr 2026 |
| 86 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Apr 2026 |
| 87 | Hollub Production Company | Seguin, TX 78156 | Oil & Gas Operator | Jul 2000 |
| 88 | Hollub, Lambert Drilling Company | Seguin, TX 78155 | Oil & Gas Operator | Apr 2026 |
| 89 | Houston Gulf Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2026 |
| 90 | Houston Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Apr 2026 |
| 91 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Apr 2026 |
| 92 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Apr 2026 |
| 93 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Apr 2026 |
| 94 | Jackson Production Co. | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2008 |
| 95 | Jenkins, R. D. | Rockdale, TX 76567 | Oil & Gas Operator | Apr 2026 |
| 96 | Jet-Tex Oil & Gas, LLC | Rockdale, TX 76567 | Oil Operator | Apr 2026 |
| 97 | JFC Construction LLC | East Bernard, TX 77435 | Oil Operator | Apr 2026 |
| 98 | Josey Oil Company | Houston, TX 77019 | Oil & Gas Operator | Jul 2006 |
| 99 | Josey, Lenoir M., Inc. | Houston, TX 77019 | Oil & Gas Operator | Aug 2003 |
| 100 | Kasan Corp. | Pharr, TX 78577 | Oil & Gas Operator | Sep 1995 |