| 1 | Aa Production Services Inc. | | Gas Operator | Nov 2023 |
| 2 | Aba Energy Corporation | | Oil & Gas Operator | Dec 2023 |
| 3 | Argosy Oil Company | | Gas Operator | Dec 1999 |
| 4 | Arkoma Production Company Of California | | Oil & Gas Operator | Dec 1993 |
| 5 | Armstrong Petroleum Corporation | | Oil & Gas Operator | Dec 2023 |
| 6 | Aspen Exploration Corporation | | Oil & Gas Operator | Dec 2007 |
| 7 | Atlantic Oil Company | | Oil & Gas Operator | Nov 2023 |
| 8 | California Oil Independents | | Oil & Gas Operator | Nov 2023 |
| 9 | California Resources Production Corporation | | Oil & Gas Operator | Dec 2023 |
| 10 | Casex Company | | Oil & Gas Operator | Dec 2007 |
| 11 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 12 | Crain Orchards Inc. | | Gas Operator | Nov 2023 |
| 13 | Crest Oil & Gas Management Corp. | | Oil & Gas Operator | Nov 2023 |
| 14 | D. E. Craggs Inc. | | Gas Operator | Dec 1993 |
| 15 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 16 | Dekalb Energy Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 1996 |
| 17 | Donald C Slawson Expl Co. Inc | | Oil & Gas Operator | Dec 2020 |
| 18 | Energy Production & Sales Co. | | Oil & Gas Operator | Dec 1999 |
| 19 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 20 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 21 | Fountain Oil And Gas Co. | | Gas Operator | Dec 1993 |
| 22 | G-W Resources Oper. Co. | | Gas Operator | Dec 1995 |
| 23 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 24 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Apr 2024 |
| 25 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 26 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Dec 2023 |
| 27 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2023 |
| 28 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2024 |
| 29 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 30 | Mobil Oil Exploration & Production North America Inc. | | Oil & Gas Operator | Dec 1996 |
| 31 | Nana Oil & Gas Inc. | | Oil & Gas Operator | Jan 2018 |
| 32 | Natural Gas Corp. Of Calif. | | Oil & Gas Operator | Dec 1987 |
| 33 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 34 | Northern Michigan Expl Co | | Oil & Gas Operator | Jul 1990 |
| 35 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 36 | Peoco LLC | | Gas Operator | Dec 2023 |
| 37 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 38 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 39 | Production Specialties Company | | Oil & Gas Operator | Dec 2003 |
| 40 | Pueblo Oil & Gas Inc. | | Gas Operator | Dec 2003 |
| 41 | Quintana Petroleum Corporation | Denver, CO 80265 | Oil & Gas Operator | Mar 1998 |
| 42 | Razar Resources | | Oil & Gas Operator | Dec 2000 |
| 43 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 44 | Robert W. Berry Inc. | | Gas Operator | Dec 1988 |
| 45 | Royale Energy Inc | San Diego, CA 92108-4518 | Oil & Gas Operator | Dec 2023 |
| 46 | Sacramento Oil & Gas Co. | | Gas Operator | Dec 2003 |
| 47 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 48 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 49 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 50 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2023 |
| 51 | Sunset Exploration Inc. | | Oil & Gas Operator | Nov 2023 |
| 52 | Tatum Petroleum Corporation | Zanesville, OH 43702 | Oil & Gas Operator | Dec 2008 |
| 53 | Texinia Oil & Gas Inc. | Dallas, TX 75214 | Oil & Gas Operator | Dec 2023 |
| 54 | The Nahabedian Exploration Group LLC | | Oil & Gas Operator | Nov 2023 |
| 55 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | Feb 2024 |
| 56 | Towne Exploration Company LP | | Oil & Gas Operator | Dec 2023 |
| 57 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 58 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 59 | United Energy Inc. | Wichita, KS 67230 | Oil & Gas Operator | Dec 2002 |
| 60 | Venada National | | Oil & Gas Operator | Dec 2010 |
| 61 | Venoco LLC | | Oil & Gas Operator | Nov 2023 |
| 62 | Vintage Production California LLC | | Oil & Gas Operator | Jun 2016 |
| 63 | Western Continental Operating Company | | Oil & Gas Operator | Dec 2007 |
| 64 | Western Discovery USA Inc. | | Oil & Gas Operator | Jan 2018 |
| 65 | Westside Farming Co. Inc. | | Gas Operator | Dec 1995 |
| 66 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |