| 2901 | Swan Lake Properties, Inc. | | Oil Operator | Jul 1987 |
| 2902 | Swan Oil Company | Kellyville, OK 74039-5607 | Oil & Gas Operator | Dec 2023 |
| 2903 | Swan PC, LP | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |
| 2904 | Swan Production Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Nov 2009 |
| 2905 | Swan Richard N | Claremore, OK 74018-0503 | Oil Operator | Aug 2013 |
| 2906 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 2907 | Swanhart Angelo & Deborah | Indiana, PA 15701-6301 | Gas Operator | Dec 2025 |
| 2908 | Swanner Properties | Wichita Falls, TX 76309 | Oil & Gas Operator | Feb 2026 |
| 2909 | Swanson & Vestal | Electra, TX 76360 | Oil & Gas Operator | Oct 1997 |
| 2910 | Swanson Douglas L & Sharon | Bartlesville, OK 74003-9319 | Oil Operator | Nov 2025 |
| 2911 | Swanson G T | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 2912 | Swanson Oil & Gas LLC | Williston, ND 58802 | Oil & Gas Operator | Dec 2025 |
| 2913 | Swanson Operating, Inc. | Holliday, TX 76366 | Oil Operator | Feb 2026 |
| 2914 | Swanson, Tom | Electra, TX 76360 | Oil & Gas Operator | Oct 2004 |
| 2915 | Swanson, Tommy Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 2916 | Swaringin, Howard Operating | Maryneal, TX 79535 | Oil & Gas Operator | May 2003 |
| 2917 | Swartout, John D & Sandra | Sherman, NY 14781 | Gas Operator | Dec 2024 |
| 2918 | Swartz Oil Company | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2026 |
| 2919 | Swartz, Guy A. | San Angelo, TX 76904 | Oil & Gas Operator | Aug 1993 |
| 2920 | SWD Acidizing, Inc. | | Oil Operator | Feb 2014 |
| 2921 | SWD, Inc. | | Oil Operator | Jan 2025 |
| 2922 | Swearingen Robert E Dba Sabo Production | Seminole, OK 74868 | Oil & Gas Operator | Nov 2025 |
| 2923 | Sweet Crude Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Feb 2026 |
| 2924 | Sweet Texas T Energy LLC | Clyde, TX 79510 | Oil Operator | Feb 2026 |
| 2925 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2026 |
| 2926 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Nov 2025 |
| 2927 | Sweetwater Production, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2026 |
| 2928 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 2929 | Swenco-Western Inc | Houston, TX 77060 | Oil & Gas Operator | Jan 1997 |
| 2930 | Swenson Backhoe Service, Inc. | Electra, TX 76360 | Oil Operator | Feb 2026 |
| 2931 | Swenson, Clifford E. | Henrietta, TX 76365 | Oil & Gas Operator | Feb 2026 |
| 2932 | Swenton Michael J | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2025 |
| 2933 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 2934 | Swepi LP And Miller Brothers | | Oil & Gas Operator | Oct 1992 |
| 2935 | Swepi/Western Division | Houston, TX 77210 | Oil & Gas Operator | Aug 1984 |
| 2936 | Swevco-Sabw LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2025 |
| 2937 | Swiess & Thomas | San Antonio, TX 78247 | Oil Operator | Feb 2026 |
| 2938 | Swift A W & Company Inc | Sand Springs, OK 74063-5124 | Oil Operator | Jun 2003 |
| 2939 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 2940 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 2941 | Swift Energy Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2017 |
| 2942 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |
| 2943 | Swingle Drilling Inc | Crooksville, OH 43731 | Oil & Gas Operator | Dec 2024 |
| 2944 | Swinkwood Oil Co | | Oil Operator | Apr 2015 |
| 2945 | SWJN Oil Company | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 2946 | SWN Production (Louisiana), LLC | | Oil & Gas Operator | Dec 2024 |
| 2947 | SWN Production (Ohio), LLC | Morgantown, WV 26508 | Oil & Gas Operator | Mar 2024 |
| 2948 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Dec 2025 |
| 2949 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 2950 | Swo & Ism, LLC | | Oil & Gas Operator | Dec 2021 |
| 2951 | Swope Corp. | Austin, TX 78735 | Oil & Gas Operator | Feb 2026 |
| 2952 | Swordfish Energy Operating, LLC | Houston, TX 77060 | Oil & Gas Operator | Feb 2026 |
| 2953 | SWS | Humble, TX 77338 | Oil Operator | Feb 2026 |
| 2954 | SWS Operating LLC | Lawton, OK 73501-3236 | Oil Operator | Sep 2024 |
| 2955 | SWV Energy Operating LLC | Spring, TX 77379 | Gas Operator | Dec 2018 |
| 2956 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 2957 | Sycamore Development Partners LLC | | Oil & Gas Operator | Dec 2025 |
| 2958 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Feb 2026 |
| 2959 | Sydson D'Oro Exploration Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 2960 | Sydson Energy, Inc. | Houston, TX 77027 | Oil & Gas Operator | Feb 2026 |
| 2961 | Syj Oil & Gas | San Antonio, TX 78209 | Oil Operator | Sep 2000 |
| 2962 | Syj Oil & Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2026 |
| 2963 | Sylvan Energy, LLC | Pittsburgh, PA 15211 | Oil & Gas Operator | Feb 2026 |
| 2964 | Sylvan Oil Operating Company | Tulsa, OK 74103-3516 | Oil & Gas Operator | Apr 2016 |
| 2965 | Sylves Robert J | New Florence, PA 15944-7950 | Gas Operator | Dec 2016 |
| 2966 | Sylvite Corp | Tulsa, OK 741363908 | Oil & Gas Operator | Dec 2000 |
| 2967 | Symank, Steve | Olney, TX 76374 | Oil & Gas Operator | Feb 2026 |
| 2968 | Symba American Oil, Inc | Houston, TX 77056 | Oil Operator | Feb 2026 |
| 2969 | Synd Enterprises Inc | Lakewood, NY 14750-9613 | Oil & Gas Operator | Dec 2006 |
| 2970 | Syndex Resources, Inc. | Wellesley, MA 02181-000 | Oil & Gas Operator | Dec 2021 |
| 2971 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2025 |
| 2972 | Synergy Development Corp | | Oil Operator | Apr 2011 |
| 2973 | Synergy Offshore LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2022 |
| 2974 | Synergy Oil & Gas LLC | | Oil & Gas Operator | Nov 2025 |
| 2975 | Synergy Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Nov 2019 |
| 2976 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 2977 | Synergy Oil & Gas, L.P. | Houston, TX 77024 | Oil & Gas Operator | May 2012 |
| 2978 | Synergy Operating Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 2979 | Synergy Operating LLC | Farmington, NM 87499 | Oil & Gas Operator | Nov 2025 |
| 2980 | Synergy Production Company | Houston, TX 77024 | Oil & Gas Operator | Jan 1996 |
| 2981 | Synergy Resources | Artesia, NM 88210 | Oil & Gas Operator | Jan 2015 |
| 2982 | Syntax Energy Corporation | Denton, TX 76210 | Oil Operator | Feb 2026 |
| 2983 | Synthetic Energy Corporation | Houston, TX 77006 | Oil Operator | Feb 2026 |
| 2984 | Szumigala, Edward R. & Ruth A. | Dunkirk, NY 14048 | Gas Operator | Dec 2024 |