| 1 | Abaco Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2025 |
| 2 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | Jul 2025 |
| 3 | American Shoreline, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 4 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 5 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 6 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 7 | API Operating Co. | Houston, TX 77036 | Oil & Gas Operator | Jul 2025 |
| 8 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Jul 2025 |
| 9 | Barnett Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Jul 2025 |
| 10 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Jul 2025 |
| 11 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 12 | Blakenergy Operating, LLC | Spring, TX 77386 | Oil & Gas Operator | Jul 2025 |
| 13 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 14 | Bruington Operating, L.L.C. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2015 |
| 15 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 16 | Cal-Tex Exploration & Production Company LLC | San Antonio, TX 78228 | Oil & Gas Operator | Jul 2025 |
| 17 | Chestnut Explor. And Prod., Inc. | Dallas, TX 75208 | Oil & Gas Operator | Jul 2025 |
| 18 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 19 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 20 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Jul 2025 |
| 21 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Jul 2025 |
| 22 | Clide Oil Corp. | Iraan, TX 79744 | Oil & Gas Operator | Nov 2015 |
| 23 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 24 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 25 | Cody Energy LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2020 |
| 26 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 27 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2025 |
| 28 | Dallas Petroleum Group, LLC | Dallas, TX 75379 | Oil & Gas Operator | Jul 2025 |
| 29 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 30 | Dewbre Petroleum Corporation | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Jul 2025 |
| 31 | Discovery Petroleum, L.L.C. | Alice, TX 78333 | Oil & Gas Operator | Jul 2025 |
| 32 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 33 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 34 | DSR Oil & Gas, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 35 | Durango Resources Corp. | Houston, TX 77043 | Oil & Gas Operator | Jul 2025 |
| 36 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 37 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Jul 2025 |
| 38 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 39 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Apr 2025 |
| 40 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 41 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 42 | Erin Oil Co. | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 43 | Esenjay Exploration, Inc | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 44 | Esenjay Petroleum Corp. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jul 1998 |
| 45 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 46 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 47 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | May 2025 |
| 48 | Fesco, LTD. | Alice, TX 78332 | Oil Operator | Jul 2025 |
| 49 | Ffa Petroleum Services | Victoria, TX 77903 | Oil & Gas Operator | Sep 2001 |
| 50 | Ffa Petroleum Services, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Feb 2018 |
| 51 | Fletcher Operating, LLC | Fairhope, AL 36532 | Oil & Gas Operator | Jul 2025 |
| 52 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Jul 2025 |
| 53 | Flournoy Production Co. | Alice, TX 78333 | Oil & Gas Operator | Dec 2002 |
| 54 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 55 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Jul 2025 |
| 56 | Franklin, J.W. Oil Operator | | Oil & Gas Operator | Nov 2001 |
| 57 | Galilee Oil Investments LLC | San Antonio, TX 78205 | Oil & Gas Operator | Jul 2025 |
| 58 | Genecov Group, Inc. The | Tyler, TX 75713 | Oil & Gas Operator | Dec 2002 |
| 59 | Gennesaret Investments, LLC | Burleson, TX 76028 | Oil & Gas Operator | Aug 2024 |
| 60 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 61 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 62 | Hanson Minerals Co. | Houston, TX 77042 | Oil & Gas Operator | Oct 1993 |
| 63 | Hanson Production Company | Cuero, TX 77954 | Oil & Gas Operator | Jul 2009 |
| 64 | Hawn Brothers | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2003 |
| 65 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Jul 2025 |
| 66 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 67 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Jul 2025 |
| 68 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 69 | Hunter Petroleum Inc. | Alice, TX 78333 | Oil & Gas Operator | May 2014 |
| 70 | Janex Oil Co., Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jun 2005 |
| 71 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Jul 2025 |
| 72 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Jul 2025 |
| 73 | La Sara Operating Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 74 | LGDC Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 75 | Lighthouse Operating, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jun 2021 |
| 76 | Madera, R. F. | Palm Desert, CA 92210 | Oil & Gas Operator | Sep 2000 |
| 77 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Apr 2025 |
| 78 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 79 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 80 | Medallion Oil Company | Houston, TX 77251 | Oil & Gas Operator | Jan 2012 |
| 81 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 82 | Milo-Austintatious | Houston, TX 77005 | Oil & Gas Operator | Aug 2006 |
| 83 | Miramar Petroleum, Inc. | Corpus Chrsti, TX 78463 | Oil & Gas Operator | Sep 2017 |
| 84 | Mitchell Energy Company L.P. | Spring, TX 77387 | Oil & Gas Operator | Mar 2008 |
| 85 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 86 | MK Operating Company LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Jul 2025 |
| 87 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 88 | Modern Exploration, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Jul 2025 |
| 89 | Mueller Engineering Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Feb 2002 |
| 90 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 91 | Nadcf Recovery Group, Inc. | Chapin, SC 29036 | Oil & Gas Operator | Jul 2025 |
| 92 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 93 | Osborn Heirs Co | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2025 |
| 94 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 95 | Panther Bayou Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Apr 2021 |
| 96 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 97 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 98 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 99 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 100 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jul 2025 |