| 1 | 3-T Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 2 | Adeco Energy Corporation | Norman, OK 73071 | Oil & Gas Operator | Apr 2014 |
| 3 | Aeternum Energy, LLC | Nederland, TX 77627 | Oil & Gas Operator | May 2025 |
| 4 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 5 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 6 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 7 | Angle Oil Company | Hays, KS 67601 | Oil Operator | Sep 2002 |
| 8 | Antle Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 9 | Aog, Inc. | Norman, OK 73070 | Oil & Gas Operator | Nov 2014 |
| 10 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 11 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 12 | Argus Production Company | Dallas, TX 75382 | Oil & Gas Operator | Nov 2023 |
| 13 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 14 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2010 |
| 15 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | May 2025 |
| 16 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | May 2025 |
| 17 | Arrow Rock Energy, LLC | Houston, TX 77079 | Oil & Gas Operator | Mar 2018 |
| 18 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 19 | Atex Exploration & Operating Co. | Whitesboro, TX 76273 | Oil & Gas Operator | May 2025 |
| 20 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 21 | Atoka Energy LLC | Gainesville, TX 76241 | Oil & Gas Operator | May 2025 |
| 22 | Atoka Operating, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | May 2025 |
| 23 | Aurora Exploration & Prod Co | Whitesboro, TX 76273 | Oil Operator | May 2025 |
| 24 | B & G Energy Corporation | Dallas, TX 75214 | Oil & Gas Operator | May 2025 |
| 25 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 26 | B-K Operating | Whitesboro, TX 76273 | Oil & Gas Operator | Oct 1997 |
| 27 | Baber, Bill M. | Petrolia, TX 76377 | Oil & Gas Operator | May 2025 |
| 28 | Baron Exploration Company | Edmond, OK 73034 | Oil & Gas Operator | May 2025 |
| 29 | Baytide Petr. Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 1997 |
| 30 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 31 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 32 | Bear Minerals LLC | Dallas, TX 75214 | Oil Operator | Jan 2025 |
| 33 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 34 | Bend Petroleum Corp. | Muenster, TX 76252 | Oil & Gas Operator | Nov 2023 |
| 35 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 36 | Biffle, Jimmy Jack | Muenster, TX 76252 | Oil & Gas Operator | Feb 2017 |
| 37 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | May 2025 |
| 38 | BKM Production | Gainesville, TX 76240 | Oil & Gas Operator | May 2025 |
| 39 | Black Oil Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 40 | Blackwell BMC, LLC | Dallas, TX 75204 | Oil & Gas Operator | Jan 2022 |
| 41 | Blackwell BMC, LP | Dallas, TX 75252 | Oil & Gas Operator | Mar 2007 |
| 42 | Blackwell Exp & Development, LLC | Dallas, TX 75252 | Oil & Gas Operator | Nov 2023 |
| 43 | BLS Production Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 44 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | May 2025 |
| 45 | BMR Operating LLC | Sadler, TX 76264 | Oil Operator | May 2025 |
| 46 | Bomar Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2020 |
| 47 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 48 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | May 2025 |
| 49 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 50 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 51 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2025 |
| 52 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 53 | Brisco, W. M. | Jacksboro, TX 76458 | Oil & Gas Operator | Nov 2003 |
| 54 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 55 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 56 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | May 2025 |
| 57 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 58 | Cascade Petroleum Corporation | Quitman, TX 75783 | Oil & Gas Operator | Mar 2002 |
| 59 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Mar 2025 |
| 60 | CH-Seon Inc. | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 61 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 62 | Charis Oil & Gas, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 63 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 64 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2025 |
| 65 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 66 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 67 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | May 2025 |
| 68 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 69 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 70 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 71 | Continental Export Corporation | Bowie, TX 76230 | Oil & Gas Operator | Sep 2013 |
| 72 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 73 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2025 |
| 74 | Cope Oil Company | Valley VIew, TX 76272 | Oil & Gas Operator | Feb 2015 |
| 75 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 76 | Crain Minerals LLC | Oklahoma City, OK 73120-1004 | Oil & Gas Operator | Aug 2014 |
| 77 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 78 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 79 | CVR Supply & Trading, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 80 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 81 | D-S-B Properties, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2014 |
| 82 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | May 2025 |
| 83 | Delek Energy Systems Us Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 84 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 85 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 86 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | May 2025 |
| 87 | Dimock Operating Company | Frisco, TX 75034 | Oil & Gas Operator | May 2025 |
| 88 | Dimock Petroleum | Dallas, TX 75205 | Oil Operator | Apr 2014 |
| 89 | Doolaree Corporation | Sherman, TX 75091 | Oil & Gas Operator | May 2025 |
| 90 | Dorfman Production Company | Beloit, OH 44609 | Oil & Gas Operator | May 2025 |
| 91 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | May 2025 |
| 92 | DSM Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 1996 |
| 93 | Dunne Equities Operating, Inc. | Houston, TX 77057 | Oil & Gas Operator | Aug 2022 |
| 94 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 95 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 96 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Mar 2025 |
| 97 | Elson Oil Company | Tulsa, OK 74103-4429 | Oil & Gas Operator | Dec 2016 |
| 98 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 99 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 100 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jan 2025 |