| 1 | Adco Producing Company | | Oil & Gas Operator | Mar 1989 |
| 2 | American Petrofina Co Of Texas | | Oil & Gas Operator | Jun 1985 |
| 3 | Arkla Petroleum LLC | | Oil & Gas Operator | May 2006 |
| 4 | Axiom Tep, LLC | | Oil & Gas Operator | May 2015 |
| 5 | Axis Onshore, LLC | | Oil & Gas Operator | Apr 2008 |
| 6 | Axis Onshore, LP | | Oil & Gas Operator | Dec 2010 |
| 7 | Badger Oil Corporation | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2011 |
| 8 | Bonita Hydrocarbons Company | Dallas, TX 75229 | Oil & Gas Operator | Jun 2008 |
| 9 | C & F Oil Company, Inc. | | Oil Operator | Jan 2025 |
| 10 | C. L. Morris, Inc. | | Oil & Gas Operator | Feb 2004 |
| 11 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 12 | Cisco Petroleum, Inc. | | Oil & Gas Operator | Oct 2010 |
| 13 | Conquest Petroleum Inc | | Oil & Gas Operator | Nov 2014 |
| 14 | D & D Exploration Co. | | Oil & Gas Operator | Nov 1986 |
| 15 | Debbie Carroll | | Oil & Gas Operator | Apr 1999 |
| 16 | Delta Expl.& Development Corp. | | Oil & Gas Operator | Jan 2025 |
| 17 | Delta Operating Company | | Oil Operator | Mar 1987 |
| 18 | Delta Petroleum Inc | Houston, TX 77269-1007 | Oil & Gas Operator | May 2009 |
| 19 | Delta Production Services, LLC | | Oil & Gas Operator | Aug 2002 |
| 20 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 21 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 22 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Jul 2025 |
| 23 | Energy Program Accompany | | Oil Operator | Dec 2006 |
| 24 | Ereunao Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2003 |
| 25 | Fife Oil & Gas | | Oil Operator | Oct 1987 |
| 26 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 27 | Fireside Oil And Gas, Inc. | West Monroe, LA 71294 | Oil & Gas Operator | Feb 2002 |
| 28 | Foster-Brown Operations, Inc. | | Oil & Gas Operator | Apr 2003 |
| 29 | Frank Spooner | | Oil & Gas Operator | Mar 1984 |
| 30 | G.G. Cornwell | | Oil Operator | Apr 1987 |
| 31 | Gladney Energy Partners, LLC | | Oil & Gas Operator | Dec 2024 |
| 32 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 33 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | Oct 2025 |
| 34 | Harvey Broyles | | Oil & Gas Operator | May 2012 |
| 35 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 36 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 37 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 38 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 39 | Jack T. Everett | | Oil & Gas Operator | Jan 2006 |
| 40 | JMR Oil, Inc. | | Oil & Gas Operator | Sep 2006 |
| 41 | Joe W. Burrage | | Oil Operator | Jun 1986 |
| 42 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 43 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 44 | Lusk & Lusk, Inc. | | Oil & Gas Operator | Jul 1984 |
| 45 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 46 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Oct 2025 |
| 47 | Miles Oil & Gas Co. | | Oil & Gas Operator | Feb 1988 |
| 48 | Monex | | Oil Operator | Apr 1988 |
| 49 | Munoco Co. | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2021 |
| 50 | Murphy - Sun | | Oil & Gas Operator | May 1989 |
| 51 | O'Malley Production Co. Inc. | | Oil & Gas Operator | Mar 1988 |
| 52 | Oilwell Acquisition Co. | | Oil & Gas Operator | Jun 1999 |
| 53 | Onyx Energy Corporation | Oklahoma City, OK 73157 | Oil & Gas Operator | May 1994 |
| 54 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 55 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |
| 56 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 57 | Phillberg Oil Company | | Oil Operator | Mar 2014 |
| 58 | Phoenix Drilling & Exploration | | Oil & Gas Operator | Jun 1982 |
| 59 | Pitts Oil Co-Dallas Prod Inc | | Oil & Gas Operator | Jun 1991 |
| 60 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | Oct 2025 |
| 61 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | Oct 2025 |
| 62 | R D V, Inc. | | Oil Operator | May 2004 |
| 63 | R. A. Campbell Company | | Oil & Gas Operator | Nov 1995 |
| 64 | Radzewicz Operating Corp. | | Oil & Gas Operator | Oct 2017 |
| 65 | Robinett Resources Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 1999 |
| 66 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 67 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 68 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Oct 2025 |
| 69 | Sola Operating, LLC | Trout, LA 71371 | Oil Operator | Oct 2025 |
| 70 | Southern Production Co | Madill, OK 73446 | Oil & Gas Operator | May 2025 |
| 71 | Spirit Petroleum Company | | Oil & Gas Operator | Apr 1999 |
| 72 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 73 | Tennessee Gas Pipeline Company | | Oil & Gas Operator | Dec 2011 |
| 74 | Termo Co. Of Texas | | Oil & Gas Operator | Dec 1986 |
| 75 | Thomas Turman | | Oil & Gas Operator | Dec 1991 |
| 76 | TMR Exploration, Inc. | Bossier City, LA 71171 | Oil & Gas Operator | Oct 2025 |
| 77 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 78 | Tradestar Energy, Inc. | Hot Springs, AR 71913 | Oil Operator | Feb 2021 |
| 79 | Trendsetter Production Co, Inc | | Oil & Gas Operator | Jul 2008 |
| 80 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 81 | United Investment Group | | Oil Operator | Nov 2004 |
| 82 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 83 | Vast Oil Inc | Fullerton, CA 92832 | Oil & Gas Operator | Mar 2024 |
| 84 | Verona Energy, Inc. | | Oil & Gas Operator | Nov 2024 |
| 85 | Viking Resources | | Oil & Gas Operator | Sep 1995 |
| 86 | W. E. O'Malley, Inc. | | Oil & Gas Operator | Jun 1991 |
| 87 | Wayne J. Spears | | Oil & Gas Operator | Sep 2005 |
| 88 | White River Operating LLC | Gilmer, TX 75644 | Oil & Gas Operator | Jul 2025 |
| 89 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 90 | World Oil & Gas Expl., Inc. | | Oil & Gas Operator | Mar 1988 |