| 1 | 4P Energy Texas, LLC | Denver, CO 80206 | Oil & Gas Operator | Nov 2020 |
| 2 | Adams & McGahey | Amarillo, TX 79114 | Oil & Gas Operator | Nov 1998 |
| 3 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Apr 2020 |
| 4 | Adams, K. S. Jr. | Houston, TX 77001 | Gas Operator | Sep 2013 |
| 5 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 6 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 7 | Amarillo Natural Gas, Inc. | Amarillo, TX 79119 | Gas Operator | Jul 1996 |
| 8 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 9 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 10 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2026 |
| 11 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 12 | Aspen Land & Exploration Co | Tulsa, OK 74159-0335 | Oil & Gas Operator | Jul 2001 |
| 13 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Sep 2026 |
| 14 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Sep 2026 |
| 15 | B&E Exploration, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2009 |
| 16 | Bar L Producers | Fritch, TX 79036 | Oil & Gas Operator | Feb 2025 |
| 17 | Barbour Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Sep 2026 |
| 18 | Batton Oil & Gas, LLC | Spearman, TX 79081 | Oil & Gas Operator | Sep 2026 |
| 19 | Bayou Oil Co. | Los Angeles, CA 90036 | Gas Operator | Nov 1996 |
| 20 | Black Resources | Borger, TX 79008 | Oil & Gas Operator | Sep 2026 |
| 21 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2026 |
| 22 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 23 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 24 | Brawley Petroleum Corporation | Lubbock, TX 79424 | Gas Operator | Aug 2017 |
| 25 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 26 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 27 | Broyles, Charles R. | Pampa, TX 79065 | Gas Operator | Mar 2016 |
| 28 | Bryan Exploration Company | Panhandle, TX 79068 | Gas Operator | Aug 1993 |
| 29 | Buffalo Raider Consulting, LLC | Amarillo, TX 79119 | Oil & Gas Operator | Sep 2026 |
| 30 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 31 | Burkett Drilling | Sunray, TX 79086 | Oil Operator | Sep 2026 |
| 32 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Oct 2025 |
| 33 | Carson Buckles Exploration LLC | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2026 |
| 34 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 35 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 36 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2026 |
| 37 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2026 |
| 38 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 39 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 40 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 41 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 42 | Costilla Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 43 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 44 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 45 | Craig, Wood B. & Bettie | Sunray, TX 79086 | Oil & Gas Operator | Aug 2005 |
| 46 | Crain Minerals LLC | Oklahoma City, OK 73120-1004 | Oil & Gas Operator | Aug 2014 |
| 47 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 48 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | May 2026 |
| 49 | Criterion Energy, Limited | Austin, TX 78737 | Gas Operator | Jan 2003 |
| 50 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 51 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 52 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 53 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Sep 2026 |
| 54 | Davis, Travis H. | Spearman, TX 79081 | Oil & Gas Operator | Jul 2003 |
| 55 | Davis, Travis H. Gas | Spearman, TX 79081 | Oil & Gas Operator | Sep 2026 |
| 56 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 57 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 58 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 59 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Sep 2026 |
| 60 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 61 | Dyne Oil & Gas,Inc. | Borger, TX 79008 | Oil & Gas Operator | Dec 2017 |
| 62 | Embassy Energy, L.L.C. | Oklahoma City, OK 73112 | Gas Operator | Apr 2001 |
| 63 | Energy Transfer Fuel, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 64 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 65 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 66 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 67 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Sep 2026 |
| 68 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 69 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 70 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 71 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jan 2026 |
| 72 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Sep 2026 |
| 73 | Federer, H. C. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 1993 |
| 74 | Fortay Inc. | Sunray, TX 79086 | Oil & Gas Operator | Sep 2026 |
| 75 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Sep 2026 |
| 76 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 2026 |
| 77 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Jun 2026 |
| 78 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 79 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 80 | Gross, L. Jack Production | Borger, TX 79008 | Oil & Gas Operator | Dec 1994 |
| 81 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 82 | H & L Exploration Company, LLC | Amarillo, TX 79114 | Oil & Gas Operator | Sep 2026 |
| 83 | H & L Gas Co. | Sunray, TX 79086 | Gas Operator | Apr 2018 |
| 84 | H & L Operating Co., L.L.P. | Amarillo, TX 79114 | Oil & Gas Operator | Aug 2022 |
| 85 | H & L Operating Co., LLC | Amarillo, TX 79114 | Oil & Gas Operator | Mar 2021 |
| 86 | Hadaway Consult And Engineer,LLC | Canadian, TX 79014 | Oil & Gas Operator | Sep 2026 |
| 87 | Hadaway Engineering Inc | Canadian, TX 79014 | Oil & Gas Operator | Jul 2015 |
| 88 | Harmon, C. E. Oil, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2019 |
| 89 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 90 | Highmark Energy Operating, LLC | Houston, TX 77253 | Oil & Gas Operator | Sep 2026 |
| 91 | Hopkins, T. M. Operating Co. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 92 | HRF Exploration & Production LLC | Gaylord, MI 49734-0160 | Gas Operator | Sep 2026 |
| 93 | HRF Exploration & Production,Inc | Denver, CO 80237 | Oil & Gas Operator | Mar 2009 |
| 94 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Sep 2026 |
| 95 | Hufo Production Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2002 |
| 96 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 97 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 98 | Hunter Oil Corporation | Gruver, TX 79040 | Oil & Gas Operator | Sep 2026 |
| 99 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 100 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Sep 2026 |