| 1 | Aa Production Services Inc. | | Gas Operator | Sep 2024 |
| 2 | Aba Energy Corporation | | Oil & Gas Operator | Oct 2024 |
| 3 | Alanmar Energy | | Gas Operator | Jan 2018 |
| 4 | Argo Petroleum Corporation | | Oil & Gas Operator | Dec 1989 |
| 5 | Aristata Exploration Co. | | Gas Operator | Dec 2009 |
| 6 | Arkoma Production Company Of California | | Oil & Gas Operator | Dec 1993 |
| 7 | Armstrong Petroleum Corporation | | Oil & Gas Operator | Sep 2024 |
| 8 | Aspen Exploration Corporation | | Oil & Gas Operator | Dec 2007 |
| 9 | Atlantic Oil Company | | Oil & Gas Operator | Sep 2024 |
| 10 | Baker Oil And Gas Company | | Gas Operator | Dec 1997 |
| 11 | Benton Oil & Gas | | Gas Operator | Dec 1992 |
| 12 | Caballero Operations LLC | | Oil & Gas Operator | Sep 2024 |
| 13 | California Hydrocarbons Corporation | | Gas Operator | Sep 2024 |
| 14 | California Resources Production Corporation | | Oil & Gas Operator | Oct 2024 |
| 15 | Campbell Energy Corp. | | Oil & Gas Operator | May 1992 |
| 16 | Castle Minerals | | Oil & Gas Operator | Dec 2018 |
| 17 | Cenex Inc. | | Oil & Gas Operator | Dec 1994 |
| 18 | Central Valley Gas Storage LLC | | Gas Operator | Oct 2024 |
| 19 | Century Production Inc | | Oil & Gas Operator | Dec 1986 |
| 20 | Champlin Petroleum Co. | Rock Springs, WY 82902 | Oil & Gas Operator | Mar 1991 |
| 21 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 22 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 23 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 24 | Crest Oil & Gas Management Corp. | | Oil & Gas Operator | Sep 2024 |
| 25 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 26 | Dekalb Energy Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 1996 |
| 27 | Denali Oil & Gas Management, LLC | Houston, TX 77060 | Oil & Gas Operator | Dec 2012 |
| 28 | Donald C Slawson Expl Co. Inc | | Oil & Gas Operator | Dec 2020 |
| 29 | Dos Rios Inc. | | Gas Operator | Oct 2024 |
| 30 | Drilling Exploration & Operating Co. Inc. | | Oil & Gas Operator | Oct 2024 |
| 31 | Dynamic Production, Inc. | Fort Worth, TX 76106 | Oil & Gas Operator | Dec 2024 |
| 32 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 33 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |
| 34 | Foothill Energy, LLC | Spring, TX 77393 | Oil & Gas Operator | Dec 2024 |
| 35 | Fountain Oil And Gas Co. | | Gas Operator | Dec 1993 |
| 36 | Gary Drilling Company | | Oil & Gas Operator | Dec 2000 |
| 37 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Dec 2024 |
| 38 | Jeans Well Service | | Gas Operator | Dec 1985 |
| 39 | Jordan Oil & Gas Company | Healdsburg, CA 95448-1919 | Oil & Gas Operator | Mar 1995 |
| 40 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2024 |
| 41 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Oct 2024 |
| 42 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Dec 2024 |
| 43 | Lee Lamberson Inc. | | Oil & Gas Operator | Dec 2000 |
| 44 | Maranatha Petroleum Inc. | | Oil & Gas Operator | Oct 2024 |
| 45 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 46 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 47 | Monument Production Inc. | | Oil & Gas Operator | Dec 2011 |
| 48 | Natural Gas Corp. Of Calif. | | Oil & Gas Operator | Dec 1987 |
| 49 | Navitas Oil & Gas LLC | | Gas Operator | Dec 2012 |
| 50 | North Valley Oil & Gas Co. | | Oil & Gas Operator | Dec 1996 |
| 51 | Northern Energy Devel. Co. | | Gas Operator | Dec 1995 |
| 52 | Northern Michigan Expl Co | | Oil & Gas Operator | Jul 1990 |
| 53 | Occidental Petroleum Corporation | | Oil & Gas Operator | Dec 2021 |
| 54 | Pacific Petroleum Technology LLC | | Oil & Gas Operator | Dec 2018 |
| 55 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 56 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 57 | Pueblo Oil & Gas Inc. | | Gas Operator | Dec 2003 |
| 58 | Razar Resources | | Oil & Gas Operator | Dec 2000 |
| 59 | Robert W. Berry Inc. | | Gas Operator | Dec 1988 |
| 60 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2024 |
| 61 | Royale Energy Inc | San Diego, CA 92108-4518 | Oil & Gas Operator | Oct 2024 |
| 62 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2024 |
| 63 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 64 | Signal Hill Petroleum Inc. | | Oil & Gas Operator | Sep 2024 |
| 65 | Source Energy Corp. | | Gas Operator | Aug 2022 |
| 66 | Steve Smith | | Gas Operator | Dec 1987 |
| 67 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Sep 2024 |
| 68 | Texaco Producing Inc. | Rock Springs, WY 82901 | Oil & Gas Operator | Dec 2000 |
| 69 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | Oct 2024 |
| 70 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 71 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 72 | Venoco LLC | | Oil & Gas Operator | Sep 2024 |
| 73 | Vintage Production California LLC | | Oil & Gas Operator | Jun 2016 |
| 74 | Western Continental Operating Company | | Oil & Gas Operator | Dec 2007 |
| 75 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |