| 1 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Dec 2025 |
| 2 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 3 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 4 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 5 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 6 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 7 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 8 | Aspen Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 9 | B & B Operating Company | Odessa, TX 79760 | Oil & Gas Operator | Dec 2025 |
| 10 | Baker Resources | San Angelo, TX 76902 | Oil & Gas Operator | Aug 2021 |
| 11 | Baker Resources, LLC | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2025 |
| 12 | Barron Petroleum LLC | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2025 |
| 13 | Baxter Casing Pullers, Inc. | Midland, TX 79703 | Gas Operator | Dec 2025 |
| 14 | Bayou Bend Petroleum Corporation | Austin, TX 78734 | Oil & Gas Operator | Sep 2006 |
| 15 | Beeson Energy, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Dec 2025 |
| 16 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 17 | Bonfire Operating LLC | Cresson, TX 76035 | Oil & Gas Operator | Dec 2025 |
| 18 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 19 | BRP Energy, LLC | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2025 |
| 20 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 21 | Canyon Oil & Gas Exploration LLC | San Antonio, TX 78258 | Oil & Gas Operator | May 2002 |
| 22 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 23 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 24 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 25 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 26 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Dec 2025 |
| 27 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 28 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 29 | Cometra Oil And Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 1997 |
| 30 | Concho Oil & Gas Corp. | Midland, TX 79701 | Oil & Gas Operator | May 2003 |
| 31 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 32 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 33 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 34 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Dec 2025 |
| 35 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 36 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 37 | Delta Hydrocarbons, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Sep 1997 |
| 38 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 39 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 40 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 41 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 42 | Dominion Oklahoma Texas E&P, Inc | Richmond, VA 23219 | Oil & Gas Operator | Sep 2018 |
| 43 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 44 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 45 | Eclipse Petroleum Corporation | La Grange, TX 78945 | Oil & Gas Operator | Aug 2003 |
| 46 | Eex E&P Company, L.P. | Houston, TX 77060 | Oil & Gas Operator | Jul 2003 |
| 47 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 48 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 49 | Enercorp Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 1993 |
| 50 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 51 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 52 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 53 | Epic Permian Operating, LLC | Arvada, CO 80006 | Oil & Gas Operator | Jan 2025 |
| 54 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Aug 2025 |
| 55 | Exxon Corp. - Midland | Houston, TX 77210 | Gas Operator | Jul 1997 |
| 56 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 57 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 58 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Dec 2025 |
| 59 | Fiml Natural Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2014 |
| 60 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 61 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2025 |
| 62 | Great Northern Energy, Inc | Irving, TX 75039 | Oil & Gas Operator | Dec 2025 |
| 63 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 64 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 65 | Hamilton, J. R. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Dec 2025 |
| 66 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Dec 2025 |
| 67 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 68 | Harding Well Service Co. | Coahoma, TX 79511 | Oil & Gas Operator | Aug 2003 |
| 69 | Henry Petroleum LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Dec 2025 |
| 70 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 71 | Henry, J.R. Inc | Brenham, TX 77833 | Oil & Gas Operator | Dec 2025 |
| 72 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 73 | Highmount Expl & Prod Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 74 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Dec 2025 |
| 75 | Hillin, T. A. | Kerrville, TX 78028 | Oil & Gas Operator | Aug 2020 |
| 76 | HMH Operators, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 77 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Dec 2025 |
| 78 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 79 | Hunt Petroleum Corp. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 80 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 81 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 82 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2025 |
| 83 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Dec 2025 |
| 84 | Llano Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 85 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 86 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 87 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 88 | McGuffin, Joe Jr. | Christoval, TX 76935 | Oil & Gas Operator | Dec 2025 |
| 89 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 90 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 91 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 92 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 93 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 94 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2025 |
| 95 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 96 | MWWD Operator, LLC | Victoria, TX 77904 | Oil Operator | Dec 2025 |
| 97 | Newfield Exploration Company | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2017 |
| 98 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
| 99 | Occidental Permian LTD. | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 100 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |