| 1 | Acadian Gas Pipeline System | | Oil Operator | Jan 2025 |
| 2 | Acadiana Gas Systems, Inc. | | Oil & Gas Operator | Jan 1999 |
| 3 | Alamo Petroleum Company | | Oil & Gas Operator | Jun 1985 |
| 4 | Alpine Expl. Companies, Inc. | | Oil & Gas Operator | Jan 2024 |
| 5 | Amax Petroleum Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2012 |
| 6 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 7 | American Exploration Oper. Co. | | Oil & Gas Operator | May 1990 |
| 8 | Anderson Exploration Co., Inc. | | Oil & Gas Operator | Sep 2023 |
| 9 | Annco Pet. Co & Equipment, Inc | | Oil & Gas Operator | Sep 1982 |
| 10 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 11 | Apb Oil Corporation | Houston, TX 77052 | Oil & Gas Operator | Apr 1996 |
| 12 | Apd Company | | Oil & Gas Operator | Apr 1987 |
| 13 | Arbol Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | Feb 2026 |
| 14 | Arco O & G Co-Div Atl Rich Co | | Oil & Gas Operator | Feb 1994 |
| 15 | Ash Exploration, Inc. | | Oil & Gas Operator | Apr 2010 |
| 16 | Ashuca | | Oil Operator | Feb 1998 |
| 17 | Atinum Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 18 | Austral Oil & Exploration, Inc | | Oil & Gas Operator | Jun 2004 |
| 19 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Feb 2026 |
| 20 | B K L Incorporated | Morton, TX 79346 | Oil & Gas Operator | Jun 2002 |
| 21 | Baham Energy Services, LLC | | Oil Operator | Dec 2024 |
| 22 | Barton Oil & Gas Co., Inc. | | Oil & Gas Operator | Sep 1993 |
| 23 | Bean Resources, Inc | | Oil & Gas Operator | Aug 2006 |
| 24 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 25 | Belco Operating Corp. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 26 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Feb 2026 |
| 27 | Boca Production Inc | | Oil & Gas Operator | Jun 2002 |
| 28 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2025 |
| 29 | BP Exploration Inc | | Oil & Gas Operator | May 1993 |
| 30 | Bridwell Oil Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 31 | Bridwell Oil MGMT Of Al, LLC | | Oil & Gas Operator | Apr 2006 |
| 32 | Bristol Exploration, Inc. | | Oil & Gas Operator | Jul 1991 |
| 33 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 34 | Britlind Oil LLC | | Oil & Gas Operator | Dec 2020 |
| 35 | Bronco Energy | | Oil & Gas Operator | Oct 1983 |
| 36 | Brown & McKenzie, Inc. | | Oil & Gas Operator | May 1984 |
| 37 | Bull Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2026 |
| 38 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 39 | C & D Resources, Inc. | | Oil & Gas Operator | Nov 2001 |
| 40 | C & VC, Inc. | | Oil & Gas Operator | Sep 1991 |
| 41 | C.F. Braun & Company | | Oil & Gas Operator | Dec 1986 |
| 42 | Caddo Management, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 43 | Cajun Minerals, Inc. | | Oil & Gas Operator | Mar 1997 |
| 44 | Cajun Operating, Inc. | | Oil & Gas Operator | Jun 2011 |
| 45 | Callon Offshore Production, Inc. | Natchez, MS 39121 | Oil & Gas Operator | Dec 2005 |
| 46 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 47 | Camex, Inc. | | Oil & Gas Operator | Jun 1992 |
| 48 | Cankton Oil Company | | Oil Operator | May 1985 |
| 49 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | Feb 2026 |
| 50 | Cardinal Expl And Prod | | Oil & Gas Operator | May 2019 |
| 51 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |
| 52 | Celeron Oil & Gas Company | | Oil & Gas Operator | Dec 1987 |
| 53 | Champlin Petroleum Co. | Rock Springs, WY 82902 | Oil & Gas Operator | Mar 1991 |
| 54 | Chaparral Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2009 |
| 55 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2026 |
| 56 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 57 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 58 | Clearly Petroleum, LLC | Houston, TX 77086 | Oil & Gas Operator | Jun 2020 |
| 59 | Cliffs Drilling Company | | Oil & Gas Operator | Dec 1984 |
| 60 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 61 | Colorado Oil Co., Inc. | | Oil & Gas Operator | Dec 1977 |
| 62 | Concord Operating Incorporated | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2008 |
| 63 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 64 | Cougar Exploration, Inc. | | Oil & Gas Operator | Jun 1988 |
| 65 | Cox Oil & Gas Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 66 | Credo Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jan 2013 |
| 67 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 68 | CX Operating, Inc. | | Oil & Gas Operator | Oct 2023 |
| 69 | Cypress Gas Pipeline Company | | Oil Operator | Dec 1998 |
| 70 | Cypress Gas Pipeline, LLC | | Oil Operator | Sep 2019 |
| 71 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Feb 2026 |
| 72 | D90 Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 73 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 74 | Daniel Oil Company | | Oil & Gas Operator | Jan 1983 |
| 75 | Darsey Operating Corporation | | Oil & Gas Operator | Sep 1990 |
| 76 | David Crow | | Oil & Gas Operator | Nov 1985 |
| 77 | Davis Gulf Coast, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 78 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2026 |
| 79 | Denbury Resources Inc. | Plano, TX 75024 | Oil & Gas Operator | Dec 2003 |
| 80 | Despot Exploration, Inc. | | Oil & Gas Operator | Apr 1990 |
| 81 | Destin Operating Company, Inc. | | Oil & Gas Operator | Jan 2023 |
| 82 | Diversified Energy Investments | | Oil & Gas Operator | May 2009 |
| 83 | Dow Chemical Co. | | Oil & Gas Operator | Dec 1997 |
| 84 | Drew Cornell, Inc. | | Oil & Gas Operator | Jun 1992 |
| 85 | Drew Cornell, Inc.-Agent | | Oil & Gas Operator | Sep 1990 |
| 86 | Drew Cornell,Inc.-C.H.Lawrence | | Oil & Gas Operator | Sep 1990 |
| 87 | Drew Cornell,Inc.-R Waterbury | | Oil Operator | Jun 1999 |
| 88 | Dunn Exploration Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 89 | Eads Operating Company | | Oil & Gas Operator | Mar 1991 |
| 90 | Eclipse Services, Inc. * | La Grange, TX 78945 | Oil & Gas Operator | Jul 2003 |
| 91 | Edwin L. Cox | | Oil & Gas Operator | May 1986 |
| 92 | Edwin L. Cox & Berry R. Cox | | Oil & Gas Operator | Jun 1986 |
| 93 | El-Oil, LTD. | | Oil & Gas Operator | Nov 2024 |
| 94 | Elysium Jennings, LLC | | Oil & Gas Operator | Dec 2024 |
| 95 | Empire Louisiana LLC Of Delaware | | Oil & Gas Operator | Dec 2024 |
| 96 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 97 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 98 | Energy Sources, Inc. | | Oil & Gas Operator | Nov 1990 |
| 99 | Energyquest Management, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2021 |
| 100 | Enlink Lig, LLC | | Oil Operator | Jan 2025 |