| 1 | Aba Energy Corporation | | Oil & Gas Operator | Dec 2023 |
| 2 | Allied Energy Corporation | | Oil & Gas Operator | Nov 2023 |
| 3 | Amerada Hess Corp. Unit Operator | | Oil & Gas Operator | Dec 1986 |
| 4 | Arkoma Production Company Of California | | Oil & Gas Operator | Dec 1993 |
| 5 | Atasca Resources Inc | Houston, TX 77219 | Oil & Gas Operator | Apr 2024 |
| 6 | Atlantic Oil Company | | Oil & Gas Operator | Nov 2023 |
| 7 | Baker Oil And Gas Company | | Gas Operator | Dec 1997 |
| 8 | Black Mountain Oil Co. | | Oil & Gas Operator | Dec 1999 |
| 9 | California Resources Production Corporation | | Oil & Gas Operator | Dec 2023 |
| 10 | Capitol Oil Corporation | | Oil & Gas Operator | Nov 2023 |
| 11 | Carneros Energy Inc. | | Oil & Gas Operator | Dec 2004 |
| 12 | Channel Exploration Company | | Oil & Gas Operator | Feb 1997 |
| 13 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 14 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 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 | Delta Sierra Oil & Gas LLC | | Gas Operator | Jan 2018 |
| 18 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 19 | Enerfin Resources Northwest Limited Partnership | | Oil & Gas Operator | Jan 2022 |
| 20 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 21 | Fleet Oil Co. | | Oil & Gas Operator | Dec 1991 |
| 22 | Gary Drilling Company | | Oil & Gas Operator | Dec 2000 |
| 23 | Horizon Operating Co. | | Oil & Gas Operator | Dec 1995 |
| 24 | Island Energy Partners LLC | | Gas Operator | Jan 2018 |
| 25 | J. L. Davis | | Oil & Gas Operator | Dec 1985 |
| 26 | John Pestana Family Trust | | Oil & Gas Operator | Dec 1994 |
| 27 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2024 |
| 28 | Lee And Jane Laird | | Oil & Gas Operator | Dec 2002 |
| 29 | Maria L. Andrade | | Oil Operator | Dec 2006 |
| 30 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 31 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 32 | Nahama & Weagant Energy Company | | Oil & Gas Operator | Dec 1997 |
| 33 | Natural Gas Corp. Of Calif. | | Oil & Gas Operator | Dec 1987 |
| 34 | North Valley Oil & Gas Co. | | Oil & Gas Operator | Dec 1996 |
| 35 | Occidental Petroleum Corporation | | Oil & Gas Operator | Dec 2021 |
| 36 | Pacific Gas And Electric Company | | Gas Operator | Nov 2023 |
| 37 | Peoco LLC | | Gas Operator | Dec 2023 |
| 38 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 39 | Production Specialties Company | | Oil & Gas Operator | Dec 2003 |
| 40 | Reabold California LLC | | Oil & Gas Operator | Dec 2023 |
| 41 | Robert A. Cohan | | Oil & Gas Operator | Jan 2018 |
| 42 | Royale Energy Inc | San Diego, CA 92108-4518 | Oil & Gas Operator | Dec 2023 |
| 43 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 44 | Shoshone Oil Corp. | | Oil & Gas Operator | Dec 2005 |
| 45 | Sunset Exploration Inc. | | Oil & Gas Operator | Nov 2023 |
| 46 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | Feb 2024 |
| 47 | Tonka Energy Inc. | | Oil & Gas Operator | Dec 2004 |
| 48 | Tri-Valley Oil & Gas Co. | | Oil & Gas Operator | Nov 2023 |
| 49 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 50 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 51 | Venada National | | Oil & Gas Operator | Dec 2010 |
| 52 | Venoco LLC | | Oil & Gas Operator | Nov 2023 |
| 53 | Venturini Associates Inc. | | Oil & Gas Operator | Dec 1995 |
| 54 | Vintage Production California LLC | | Oil & Gas Operator | Jun 2016 |
| 55 | Western Continental Operating Company | | Oil & Gas Operator | Dec 2007 |