| 1 | 260 Resource Management LLC | | Gas Operator | Feb 2025 |
| 2 | Aba Energy Corporation | | Oil & Gas Operator | Mar 2025 |
| 3 | Alanmar Energy | | Gas Operator | Jan 2018 |
| 4 | Anacapa Oil Corporation | | Gas Operator | Feb 2025 |
| 5 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 6 | Apc Operating Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Oct 1996 |
| 7 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 8 | Aspen Exploration Corporation | | Oil & Gas Operator | Dec 2007 |
| 9 | Atlantic Oil Company | | Oil & Gas Operator | Feb 2025 |
| 10 | Bakersfield Energy Resources Inc. | | Oil & Gas Operator | Dec 1998 |
| 11 | Black Mountain Oil Co. | | Oil & Gas Operator | Dec 1999 |
| 12 | California E.D.I. Inc. | | Oil & Gas Operator | Jan 2018 |
| 13 | California Resources Production Corporation | | Oil & Gas Operator | Mar 2025 |
| 14 | Campbell Energy Corp. | | Oil & Gas Operator | May 1992 |
| 15 | Capitol Oil Corporation | | Oil & Gas Operator | Feb 2025 |
| 16 | Casex Company | | Oil & Gas Operator | Dec 2007 |
| 17 | Castle Minerals | | Oil & Gas Operator | Dec 2018 |
| 18 | Champlin Petroleum Co. | Rock Springs, WY 82902 | Oil & Gas Operator | Mar 1991 |
| 19 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 20 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 21 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 22 | Denali Oil & Gas Management, LLC | Houston, TX 77060 | Oil & Gas Operator | Dec 2012 |
| 23 | Donald C Slawson Expl Co. Inc | | Oil & Gas Operator | Dec 2020 |
| 24 | Elk Slough Pipeline Co. | | Oil & Gas Operator | Dec 1999 |
| 25 | Enerfin Resources Northwest Limited Partnership | | Oil & Gas Operator | Jan 2022 |
| 26 | Geo Investment Inc. | | Oil & Gas Operator | Dec 2003 |
| 27 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 28 | H. T. Hilliard & Co. | | Oil & Gas Operator | Dec 1999 |
| 29 | H. W. Reynolds Jr. | | Gas Operator | Dec 1984 |
| 30 | Hartley Natural Resource Development | | Oil & Gas Operator | Feb 2025 |
| 31 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 32 | Instrat Inc. | | Oil & Gas Operator | Dec 1992 |
| 33 | J. L. Davis | | Oil & Gas Operator | Dec 1985 |
| 34 | Kaiser Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 1990 |
| 35 | Kelpetro Operating Inc. | | Oil & Gas Operator | Dec 2021 |
| 36 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 37 | KMP Operating Inc. | | Oil Operator | Mar 2025 |
| 38 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | May 2025 |
| 39 | Lomax Exploration Company | Roosevelt, UT 84066 | Oil & Gas Operator | Jun 1995 |
| 40 | Longbow LLC | | Oil & Gas Operator | Mar 2025 |
| 41 | Maranatha Petroleum Inc. | | Oil & Gas Operator | Feb 2025 |
| 42 | Mariposa Petroleum Co. | | Gas Operator | Dec 1980 |
| 43 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 44 | Monterey Resources Inc. | | Oil & Gas Operator | Dec 1997 |
| 45 | Monument Production Inc. | | Oil & Gas Operator | Dec 2011 |
| 46 | Nahama & Weagant Energy Company | | Oil & Gas Operator | Dec 1997 |
| 47 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 48 | Natural Gas Corp. Of Calif. | | Oil & Gas Operator | Dec 1987 |
| 49 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 50 | Northwest Petroleum Inc. | | Oil & Gas Operator | Feb 2025 |
| 51 | Occidental Petroleum Corporation | | Oil & Gas Operator | Dec 2021 |
| 52 | Output Exploration LLC | | Oil & Gas Operator | Dec 2006 |
| 53 | Pacific Gas And Electric Company | | Gas Operator | Mar 2025 |
| 54 | Pacific Inland Operating Corporation | | Gas Operator | Dec 1993 |
| 55 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 56 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 57 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 58 | Prima Oil & Gas Company | Denver, CO 80202 | Gas Operator | Sep 1998 |
| 59 | Princeton Natural Gas LLC | | Gas Operator | Feb 2025 |
| 60 | R&R Resources LLC | | Oil & Gas Operator | Feb 2025 |
| 61 | Resource Engineering | | Gas Operator | Nov 2024 |
| 62 | Richard Steltzner | | Gas Operator | Dec 1992 |
| 63 | Robert A. Cohan | | Oil & Gas Operator | Jan 2018 |
| 64 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | May 2025 |
| 65 | Royale Energy Inc | San Diego, CA 92108-4518 | Oil & Gas Operator | Mar 2025 |
| 66 | S. M. Reynolds Opr. | | Gas Operator | Dec 1990 |
| 67 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 68 | Seaward Resources Inc. | | Gas Operator | Dec 1984 |
| 69 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 70 | Shoshone Oil Corp. | | Oil & Gas Operator | Dec 2005 |
| 71 | Stockdale Energy Co. | | Gas Operator | Dec 1992 |
| 72 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2025 |
| 73 | Texaco Producing Inc. | Rock Springs, WY 82901 | Oil & Gas Operator | Dec 2000 |
| 74 | Texas Crude Energy, Inc. | Houston, TX 77256 | Oil & Gas Operator | Oct 2012 |
| 75 | The Nahabedian Exploration Group LLC | | Oil & Gas Operator | Feb 2025 |
| 76 | Tooby Farms | | Gas Operator | Dec 1989 |
| 77 | Towne Exploration Company LP | | Oil & Gas Operator | Mar 2025 |
| 78 | Two Bay Petroleum | | Oil & Gas Operator | Dec 2010 |
| 79 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 80 | Venada National | | Oil & Gas Operator | Dec 2010 |
| 81 | Venoco LLC | | Oil & Gas Operator | Feb 2025 |
| 82 | Vern Jones Oil & Gas Corp. | Sacramento, CA 95825 | Oil & Gas Operator | Mar 2025 |
| 83 | Vintage Production California LLC | | Oil & Gas Operator | Jun 2016 |
| 84 | Well Water Management | | Oil & Gas Operator | Feb 2025 |
| 85 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | May 2025 |