| 1 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 2 | Arbco, Inc. | | Oil & Gas Operator | Jan 1996 |
| 3 | Azul Operating, LLC | | Gas Operator | Dec 2024 |
| 4 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 5 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 6 | BMR Oil & Gas, Inc. | | Oil & Gas Operator | Dec 2024 |
| 7 | Bob R. Hyde Co. | | Oil Operator | May 1986 |
| 8 | Braddock Exploration, LTD. | | Oil & Gas Operator | Mar 1991 |
| 9 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 10 | Brian C. Register | | Oil & Gas Operator | Jun 2011 |
| 11 | C. H. C. Gerard | | Oil & Gas Operator | Jan 2025 |
| 12 | Caddo Oil Co.,Inc. | | Oil & Gas Operator | Apr 1987 |
| 13 | Centerpoint Energy FLD Ser Inc | | Oil Operator | Feb 2011 |
| 14 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 15 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 16 | Claude S. Hinds | | Oil Operator | Aug 1985 |
| 17 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 18 | Cobra-Lyons-Hilliard-Watson | | Oil & Gas Operator | Jun 1992 |
| 19 | Comstock Oil & Gas--La, LLC | | Oil & Gas Operator | Dec 2024 |
| 20 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 21 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 22 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 23 | D. B. McConnell | | Oil & Gas Operator | Oct 1991 |
| 24 | D. I. Dupree | | Oil & Gas Operator | Sep 2015 |
| 25 | Danos Oil & Gas LLC | | Oil & Gas Operator | Oct 2024 |
| 26 | DCP Midstream, LLC | | Oil Operator | Jun 2016 |
| 27 | Don Webb | | Oil Operator | Mar 1984 |
| 28 | Dossie Dews | | Oil & Gas Operator | Dec 2024 |
| 29 | Dupree And Dupree | | Oil Operator | Dec 1998 |
| 30 | Eddy Enterprises, Inc. | | Oil & Gas Operator | Sep 2023 |
| 31 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 32 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 33 | Enlink Lig, LLC | | Oil Operator | Jan 2025 |
| 34 | Ensight Energy Management, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2005 |
| 35 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 36 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 37 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 38 | Faith Energy, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 39 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Dec 2025 |
| 40 | Fran Oil, Inc. | | Oil & Gas Operator | Dec 2024 |
| 41 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 42 | Frontier Exploration, Inc. | | Oil & Gas Operator | Aug 1984 |
| 43 | G. E. Kadane & Sons | | Oil & Gas Operator | Apr 1990 |
| 44 | George M. Bagley | | Oil Operator | Dec 2024 |
| 45 | Gep Haynesville, LLC | | Gas Operator | Dec 2021 |
| 46 | Gerald C. Eddy | | Oil & Gas Operator | Oct 1987 |
| 47 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 48 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 49 | Grogan Field Production, L.L.C. | | Oil Operator | Jan 2025 |
| 50 | Gulf South Pipeline Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 51 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 52 | H. B. McCullough | | Oil Operator | Oct 2004 |
| 53 | High-Hope Oil And Gas, Inc | | Oil & Gas Operator | Mar 2017 |
| 54 | Huggs Incorporated, Et Al | | Oil & Gas Operator | Feb 1998 |
| 55 | Hunt Petroleum Corp. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 56 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 57 | Iron Springs Operating Co. Inc | | Oil & Gas Operator | Jan 2025 |
| 58 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Dec 2025 |
| 59 | J. D. Kemp | | Oil Operator | Aug 1994 |
| 60 | J. T. Bierden, Jr. | | Oil Operator | Feb 1993 |
| 61 | Jeems Bayou Production Corp. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2025 |
| 62 | Jerry R. Craig | | Oil & Gas Operator | Dec 2012 |
| 63 | John L. Copeland | | Oil & Gas Operator | Jun 1982 |
| 64 | John T. Martin, Jr. | | Oil Operator | Jun 1992 |
| 65 | Johnson & Johnson Operating, Inc. | | Oil & Gas Operator | Jan 2025 |
| 66 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 67 | L'Oil Operating And MGMT. Co. | | Oil & Gas Operator | Dec 2008 |
| 68 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 69 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 70 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 71 | Louisiana-Hunt Petroleum Corp. | | Oil & Gas Operator | Dec 1985 |
| 72 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 73 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Nov 2025 |
| 74 | Marlan Anderson | | Oil Operator | Jan 2025 |
| 75 | Marlin Exploration, Inc. | | Oil & Gas Operator | Oct 2006 |
| 76 | Mid South Oil & Gas Expl Inc | | Oil & Gas Operator | Jan 1992 |
| 77 | Moran Oil Co., Inc. | | Oil & Gas Operator | Aug 2009 |
| 78 | Nerco Oil & Gas Inc | | Oil & Gas Operator | Dec 1996 |
| 79 | O'Brien Operating Company | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2004 |
| 80 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 81 | Petroleum Recovery & Expl Inc. | | Oil Operator | Oct 1984 |
| 82 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 83 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Sep 2025 |
| 84 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 85 | R & F Land Co., Inc. | | Oil & Gas Operator | Jan 2000 |
| 86 | Redd Production Of Mansfield | | Oil & Gas Operator | Jan 1991 |
| 87 | Remuda Oil & Gas Corp. | | Oil & Gas Operator | Aug 1987 |
| 88 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Dec 2025 |
| 89 | Richard C. Hinds | | Oil Operator | Jan 2025 |
| 90 | Rockcliff Operating La LLC | | Oil & Gas Operator | Jul 2022 |
| 91 | Roger Wilson | | Oil Operator | Apr 2002 |
| 92 | Samson Contour Energy E&P, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2017 |
| 93 | San Miguel Oil & Gas, Inc. | | Oil & Gas Operator | Jan 1993 |
| 94 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 95 | Sewell Development Co Inc | | Oil & Gas Operator | Apr 1993 |
| 96 | Shufflin Energy | | Oil & Gas Operator | Sep 2011 |
| 97 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 98 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 99 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 100 | SWN Production (Louisiana), LLC | | Oil & Gas Operator | Dec 2024 |