| 27901 | Southern Star Operating, Inc. | | Oil & Gas Operator | Jun 2010 |
| 27902 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 27903 | Southern States Gas & Oil LTD | | Oil & Gas Operator | Jul 2004 |
| 27904 | Southern States Oil Production, LLC | | Oil & Gas Operator | Oct 2013 |
| 27905 | Southern States Petroleum Corp | | Oil Operator | Jan 1984 |
| 27906 | Southern Tejas Asset Group LLC | McAllen, TX 78501 | Oil & Gas Operator | Apr 2025 |
| 27907 | Southern Triangle Oil | | Oil & Gas Operator | Dec 2000 |
| 27908 | Southern Triangle Oil Co | MT Carmel, IL 62863 | Oil & Gas Operator | Dec 2023 |
| 27909 | Southern Union Exploration | | Oil Operator | Jan 1990 |
| 27910 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 27911 | Southern Union Production Co. | | Oil Operator | Apr 1979 |
| 27912 | Southern Water Disposal, LLC | | Oil & Gas Operator | Jan 2025 |
| 27913 | Southern Wells, Inc. | | Oil Operator | Sep 2002 |
| 27914 | Southern WV Oil & Gas | | Gas Operator | Dec 2021 |
| 27915 | Southfourk Partners LLC | Blanchard, OK 73010-7209 | Oil Operator | Jan 2025 |
| 27916 | Southlake Exploration, Inc. | Southlake, TX 76092 | Oil & Gas Operator | Apr 2025 |
| 27917 | Southlake Operating LLC | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2025 |
| 27918 | Southland Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Aug 2022 |
| 27919 | Southland Royalt | | Oil & Gas Operator | Nov 1993 |
| 27920 | Southland Royalty Co.-Midland | Midland, TX 79702 | Oil & Gas Operator | Mar 1996 |
| 27921 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 27922 | Southland Royalty Company LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2021 |
| 27923 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 27924 | Southridge Homes | | Oil & Gas Operator | Dec 1999 |
| 27925 | Southridge Operating Company | San Marcos, TX 78667 | Oil & Gas Operator | Apr 2025 |
| 27926 | Southstar Energy Corporation | Ardmore, OK 73401 | Gas Operator | Aug 1990 |
| 27927 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 27928 | Southstone Energy, LLC | Austin, TX 78735 | Oil Operator | Apr 2025 |
| 27929 | Southwell Russell C | Warren, PA 16365-3686 | Oil & Gas Operator | Dec 2022 |
| 27930 | Southwell William R | Warren, PA 16365-1259 | Oil & Gas Operator | Dec 2017 |
| 27931 | Southwest Energy Devel.,Inc. | Sugar Land, TX 77478 | Oil & Gas Operator | Jul 2007 |
| 27932 | Southwest Energy Development Inc | Bison, OK 73720 | Oil & Gas Operator | Jan 2025 |
| 27933 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 27934 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 27935 | Southwest Gas Producing Co Inc | | Oil & Gas Operator | Nov 1994 |
| 27936 | Southwest Gas St | | Oil & Gas Operator | Dec 1981 |
| 27937 | Southwest Gas Storage Company | | Gas Operator | Dec 2024 |
| 27938 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 2025 |
| 27939 | Southwest Gathering Company | Alice, TX 78332 | Oil & Gas Operator | Apr 2025 |
| 27940 | Southwest General Dev., Inc. | | Oil & Gas Operator | Dec 2003 |
| 27941 | Southwest Investment Fund, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Aug 2003 |
| 27942 | Southwest Land & Minerals, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Aug 2003 |
| 27943 | Southwest Loop 1604, LTD. | San Antonio, TX 78209 | Oil Operator | Sep 2022 |
| 27944 | Southwest Mississippi Oil & Gas, LLC. | | Oil Operator | Feb 2025 |
| 27945 | Southwest Oil & Land, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 1999 |
| 27946 | Southwest Oil Properties, Inc. | | Oil & Gas Operator | Feb 1996 |
| 27947 | Southwest Operating Company | Overland Park, KS 66212 | Oil & Gas Operator | Mar 2012 |
| 27948 | Southwest Operating Inc. | | Oil & Gas Operator | Dec 2024 |
| 27949 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Apr 2025 |
| 27950 | Southwest Petroleum | San Antonio, TX 78253 | Oil & Gas Operator | Apr 2025 |
| 27951 | Southwest Petroleum Corp | Drumright, OK 74030 | Oil & Gas Operator | Mar 2018 |
| 27952 | Southwest Petroleum Oil & Gas Explor LLC | San Bernardino, CA 92404-1010 | Oil & Gas Operator | Jun 2022 |
| 27953 | Southwest Production Co | Richardson, TX BADADDR | Oil & Gas Operator | Apr 1997 |
| 27954 | Southwest Resources, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Apr 2025 |
| 27955 | Southwest Rig Service | | Oil & Gas Operator | Nov 1998 |
| 27956 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 27957 | Southwest-Operating | Penwell, TX 79776 | Oil & Gas Operator | Apr 2025 |
| 27958 | Southwestern Electric Power Co | Dallas, TX 75266 | Oil & Gas Operator | Dec 1989 |
| 27959 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 27960 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Jan 2025 |
| 27961 | Southwestern Inc | Hobbs, NM 88240 | Oil Operator | Oct 2009 |
| 27962 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2025 |
| 27963 | Southwind Consulting | Pratt, KS 67124 | Oil Operator | Oct 1997 |
| 27964 | Southwind Exploration, LLC | Venice, FL 34293 | Oil & Gas Operator | Sep 2003 |
| 27965 | Southwind Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 27966 | Southwind Petroleum Corp. | Wichita, KS 67203 | Oil & Gas Operator | Jun 2022 |
| 27967 | Sovereign Eagle, LLC | Roswell, NM 88202 | Oil & Gas Operator | Jul 2018 |
| 27968 | Sovereign Energy Corp. | | Oil Operator | Dec 2001 |
| 27969 | Sovereign Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 27970 | Sovereign Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2016 |
| 27971 | Sovereign Petroleum Company, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2013 |
| 27972 | Sowers William & Sara | Blue Rock, OH 43720 | Oil Operator | Dec 2022 |
| 27973 | Sowle Exploratio | | Oil Operator | Aug 1986 |
| 27974 | Sowle Explorations | | Oil Operator | Dec 2002 |
| 27975 | Sozo Natural Resources LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 27976 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 27977 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 27978 | Spacht, James W. & Shelly F | Ripley, NY 14775 | Gas Operator | Dec 2023 |
| 27979 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Gas Operator | Apr 2025 |
| 27980 | Spain Oil Company | Somerset, TX 78069 | Oil & Gas Operator | Apr 2025 |
| 27981 | Spalding Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 27982 | Spalsbury, Arthur L | Hays, KS 67601 | Oil Operator | Aug 2001 |
| 27983 | Spark'S Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Nov 2014 |
| 27984 | Sparkman Energy, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2025 |
| 27985 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 27986 | Sparks Daniel M | Chickasha, OK 73023-1435 | Oil & Gas Operator | Apr 2014 |
| 27987 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | Jan 2025 |
| 27988 | Sparks Harold | Radnor, OH 43066 | Oil & Gas Operator | Dec 1987 |
| 27989 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Feb 2025 |
| 27990 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 27991 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Feb 2025 |
| 27992 | Sparks, Pearlman E | Mazie, KY 41160 | Oil Operator | Dec 2015 |
| 27993 | Sparks, Sidney A., Trustee | Alice, TX 78332 | Oil & Gas Operator | Jun 1996 |
| 27994 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Feb 2025 |
| 27995 | Sparrow Oil & Gas LLC | | Oil & Gas Operator | Mar 2025 |
| 27996 | Sparrow Operating LLC | Comanche, OK 73529-9747 | Oil Operator | Feb 2025 |
| 27997 | Sparta Energy Corp | Oak Brook, IL 60521 | Oil & Gas Operator | Dec 1985 |
| 27998 | Sparta Energy LLC | Edmond, OK 73083-8158 | Oil & Gas Operator | May 2020 |
| 27999 | Sparta Exploration LLC | Houston, TX 77279 | Oil & Gas Operator | Apr 2025 |
| 28000 | Spartagus Corporation | Grand Saline, TX 75140 | Oil & Gas Operator | Sep 2004 |