| 1 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 2 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 3 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Sep 2025 |
| 4 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 5 | Arco O & G Co-Div Atl Rich Co | | Oil & Gas Operator | Feb 1994 |
| 6 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 7 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 8 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 9 | Associated Natural Gas, Inc. | | Oil Operator | Apr 1996 |
| 10 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Dec 2025 |
| 11 | Bayou South Gas Gather. Co L C | | Oil Operator | Oct 2002 |
| 12 | Bear Creek Env. Systems, LLC | | Oil Operator | Dec 2008 |
| 13 | Bear Creek Services, LLC | | Oil Operator | Dec 2024 |
| 14 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 15 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 16 | Blackbird Company | Shreveport, LA 71106 | Oil & Gas Operator | Jan 2025 |
| 17 | Bodcaw Company | | Oil & Gas Operator | Oct 1979 |
| 18 | Bodcaw Company Et Al | | Oil & Gas Operator | Oct 1979 |
| 19 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 20 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 21 | Brammer-Keystone Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 22 | Brix Operating LLC | | Gas Operator | Apr 2021 |
| 23 | Broyles Oil & Gas, Inc. | | Oil & Gas Operator | Jun 1994 |
| 24 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 25 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 26 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Dec 2025 |
| 27 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Aug 2025 |
| 28 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Dec 2025 |
| 29 | Carder Oil Company | | Oil & Gas Operator | Dec 2024 |
| 30 | Carter Resources | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2005 |
| 31 | Centerpoint Energy FLD Ser Inc | | Oil Operator | Feb 2011 |
| 32 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 33 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 34 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 35 | Comstock Oil & Gas -- La, Inc. | | Oil & Gas Operator | Mar 2005 |
| 36 | Comstock Oil & Gas--La, LLC | | Oil & Gas Operator | Dec 2024 |
| 37 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 38 | Contour Energy E & P, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 39 | Contour Energy E & P, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2003 |
| 40 | Cornerstone Natural Gas Co. | | Oil Operator | Oct 1999 |
| 41 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 42 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 43 | Covey Park Gas LLC | | Oil & Gas Operator | Aug 2019 |
| 44 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 45 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Dec 2025 |
| 46 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 47 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 48 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 49 | D & V Petroleum Corporation | | Oil & Gas Operator | May 1992 |
| 50 | D&S Oil & Gas Operators, Inc. | | Oil & Gas Operator | Dec 2020 |
| 51 | D90 Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 52 | Davis Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 1988 |
| 53 | DCP Midstream, LLC | | Oil Operator | Jun 2016 |
| 54 | Delhi Gas Pipeline Corporation | Palestine, TX 75802 | Oil & Gas Operator | Feb 1998 |
| 55 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Dec 2025 |
| 56 | DR. Richard C. Baker | | Oil & Gas Operator | Sep 2009 |
| 57 | Duke Energy Field Services Inc | | Oil Operator | Mar 2000 |
| 58 | Duke Energy Field Services LLC | | Oil Operator | Dec 2006 |
| 59 | Edward Oil Company | Youngsville, PA 16371 | Oil & Gas Operator | Nov 2024 |
| 60 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 61 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 62 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 63 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 64 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 65 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 66 | Energen Resources Maq Inc | Birmingham, AL 35203 | Oil & Gas Operator | Sep 2000 |
| 67 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Aug 2025 |
| 68 | Ensight Energy Management, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2005 |
| 69 | Ensight III Energy MGMT, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2008 |
| 70 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 71 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 72 | Eroc Gathering Company, LP | | Oil Operator | Jul 2014 |
| 73 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 74 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 75 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 76 | Excel Operating Corporation | | Oil & Gas Operator | Dec 2024 |
| 77 | Faith Energy, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 78 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Dec 2025 |
| 79 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Dec 2025 |
| 80 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 81 | Fortune Gas & Oil, Inc. | | Oil & Gas Operator | Apr 2004 |
| 82 | Foster-Brown Operations, Inc. | | Oil & Gas Operator | Apr 2003 |
| 83 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 84 | Franks & Bass Et Al | | Oil & Gas Operator | Sep 1989 |
| 85 | Franks & Broyles Et Al | | Oil & Gas Operator | Sep 1989 |
| 86 | Franks & Petrofunds, Inc. | | Oil & Gas Operator | Sep 1989 |
| 87 | Franks Operating Company, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 88 | Franks Petroleum Inc. | | Oil & Gas Operator | Nov 1994 |
| 89 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 90 | Franks-Grigsby &King Resources | | Gas Operator | Nov 1979 |
| 91 | Franks-Petrofund-Placid-Swepco | | Oil & Gas Operator | Aug 1989 |
| 92 | G. R. Goodwill | | Oil & Gas Operator | Jun 1997 |
| 93 | Gep Haynesville, LLC | | Gas Operator | Dec 2021 |
| 94 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 95 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 96 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 97 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 98 | GPM, Inc. | | Oil & Gas Operator | Jun 1994 |
| 99 | Graham-McCormick Oper. PRTSHP. | | Oil & Gas Operator | Aug 1989 |
| 100 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |