| 1 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 2 | 4P Energy Texas, LLC | Denver, CO 80206 | Oil & Gas Operator | Nov 2020 |
| 3 | A & B Well Service Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Nov 2006 |
| 4 | A.C.T. Operating Company | Lubbock, TX 79401 | Oil & Gas Operator | Sep 2026 |
| 5 | Adams & McGahey | Amarillo, TX 79114 | Oil & Gas Operator | Nov 1998 |
| 6 | Adams Affiliates, Inc. | Tulsa, OK 74121 | Oil & Gas Operator | Sep 2026 |
| 7 | Adams, K. S. Jr. | Houston, TX 77001 | Gas Operator | Sep 2013 |
| 8 | Adobe Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Sep 2026 |
| 9 | Alliance Resources Corporation | Dallas, TX 75367 | Oil & Gas Operator | Nov 2024 |
| 10 | Allison/Hobbs Inc. | Alba, TX 75410 | Oil & Gas Operator | Sep 2026 |
| 11 | Alyaha Energy, LLC | Dumas, TX 79029 | Oil & Gas Operator | Sep 2026 |
| 12 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 13 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 14 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 15 | Ananda Energy Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2021 |
| 16 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2026 |
| 17 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 18 | Arkoma, Sandra | Pampa, TX 79066 | Oil & Gas Operator | May 1995 |
| 19 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 20 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | Jun 2026 |
| 21 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 22 | Aspen Land & Exploration Co | Tulsa, OK 74159-0335 | Oil & Gas Operator | Jul 2001 |
| 23 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Sep 2026 |
| 24 | B & B Farm Industries, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2002 |
| 25 | Bar L Producers | Fritch, TX 79036 | Oil & Gas Operator | Feb 2025 |
| 26 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 27 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2026 |
| 28 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Sep 2026 |
| 29 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2026 |
| 30 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 31 | Bird Creek Resources Inc | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2022 |
| 32 | Bison Petroleum Corporation | Amarillo, TX 79121 | Oil & Gas Operator | Mar 1996 |
| 33 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | May 2026 |
| 34 | Borger Resources 3 LLC | Borger, TX 79007 | Oil & Gas Operator | Sep 2026 |
| 35 | Borger Resources 4 LLC | Borger, TX 79007 | Oil & Gas Operator | Sep 2026 |
| 36 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2026 |
| 37 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 38 | Bravo Natural Gas, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2012 |
| 39 | Brawley Petroleum Corporation | Lubbock, TX 79424 | Gas Operator | Aug 2017 |
| 40 | Buffalo Raider Consulting, LLC | Amarillo, TX 79119 | Oil & Gas Operator | Sep 2026 |
| 41 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 42 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | May 2026 |
| 43 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Sep 2026 |
| 44 | Cambridge Production, Inc. | Amarillo, TX 79120 | Oil & Gas Operator | Nov 2020 |
| 45 | Caprock Energy, Inc. | Denton, TX 76205 | Oil & Gas Operator | Apr 1993 |
| 46 | Caprock Engineering, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2018 |
| 47 | Central Crude Corp. | Wichita, KS 67206 | Oil Operator | Mar 2014 |
| 48 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 49 | Chance Energy Co. Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Sep 1999 |
| 50 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 51 | Chapter Petroleum | Borger, TX 79008 | Oil & Gas Operator | Mar 1997 |
| 52 | Chapter Petroleum, Inc. | Borger, TX 79008 | Oil & Gas Operator | Mar 2001 |
| 53 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2026 |
| 54 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2026 |
| 55 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 56 | City Of Dumas | Dumas, TX 79029 | Gas Operator | Sep 2026 |
| 57 | City Of Sunray Utilities | Sunray, TX 79086 | Oil & Gas Operator | Sep 2026 |
| 58 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 59 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 60 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 61 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 62 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 63 | Craig, Wood B. & Bettie | Sunray, TX 79086 | Oil & Gas Operator | Aug 2005 |
| 64 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 65 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | May 2026 |
| 66 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 67 | D10 Energy LLC | Stinnett, TX 79083 | Oil & Gas Operator | Sep 2026 |
| 68 | Dakar Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 69 | Davenport, Vernon Prod. Co. | Dumas, TX 79029 | Oil & Gas Operator | Jan 2002 |
| 70 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 71 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 72 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 73 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Sep 2026 |
| 74 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 75 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 76 | Dore Corporation | Amarillo, TX 79119 | Gas Operator | Jun 2010 |
| 77 | Dore Energy Co., LTD. | Amarillo, TX 79101 | Gas Operator | Sep 2026 |
| 78 | Drain Oil Co. | Fritch, TX 79036 | Oil & Gas Operator | Jul 2009 |
| 79 | Drain Oil Co. LLC | Fritch, TX 79036 | Oil & Gas Operator | Sep 2026 |
| 80 | DSX Operating Co. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2008 |
| 81 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Sep 2026 |
| 82 | Elendil Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Sep 2026 |
| 83 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 84 | Energy Transfer Fuel, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 85 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 86 | Etc Field Services LLC | Dallas, TX 75225 | Oil Operator | Jun 2018 |
| 87 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 88 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 89 | Exxcel Production Company | Pampa, TX 79066 | Oil & Gas Operator | Sep 2026 |
| 90 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jan 2026 |
| 91 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Sep 2026 |
| 92 | Five D Co | Cactus, TX 79013 | Oil & Gas Operator | Sep 1996 |
| 93 | Flavian Oil Company | Dallas, TX 75206 | Gas Operator | Jan 1997 |
| 94 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 95 | Fortay Inc. | Sunray, TX 79086 | Oil & Gas Operator | Sep 2026 |
| 96 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Sep 2026 |
| 97 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Jun 2026 |
| 98 | Future Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 1999 |
| 99 | G C & W Inc. | Borger, TX 79007 | Oil & Gas Operator | Oct 2016 |
| 100 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |