| 26901 | Southern Triangle Oil | | Oil & Gas Operator | Dec 2000 |
| 26902 | Southern Triangle Oil Co | MT Carmel, IL 62863 | Oil & Gas Operator | Dec 2024 |
| 26903 | Southern Union Exploration | | Oil Operator | Jan 1990 |
| 26904 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 26905 | Southern Union Production Co. | | Oil Operator | Apr 1979 |
| 26906 | Southern Water Disposal, LLC | | Oil & Gas Operator | Jan 2025 |
| 26907 | Southern Wells, Inc. | | Oil Operator | Sep 2002 |
| 26908 | Southfourk Partners LLC | Blanchard, OK 73010-7209 | Oil Operator | Dec 2025 |
| 26909 | Southlake Exploration, Inc. | Southlake, TX 76092 | Oil & Gas Operator | Apr 2026 |
| 26910 | Southlake Operating LLC | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2026 |
| 26911 | Southland Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Aug 2022 |
| 26912 | Southland Royalt | | Oil & Gas Operator | Nov 1993 |
| 26913 | Southland Royalty Co.-Midland | Midland, TX 79702 | Oil & Gas Operator | Mar 1996 |
| 26914 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 26915 | Southland Royalty Company LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2021 |
| 26916 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 26917 | Southridge Homes | | Oil & Gas Operator | Dec 1999 |
| 26918 | Southridge Operating Company | San Marcos, TX 78667 | Oil & Gas Operator | Apr 2026 |
| 26919 | Southstar Energy Corporation | Ardmore, OK 73401 | Gas Operator | Aug 1990 |
| 26920 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 26921 | Southstone Energy, LLC | Austin, TX 78735 | Oil Operator | Apr 2026 |
| 26922 | Southwell Russell C | Warren, PA 16365-3686 | Oil & Gas Operator | Dec 2022 |
| 26923 | Southwell William R | Warren, PA 16365-1259 | Oil & Gas Operator | Dec 2017 |
| 26924 | Southwest Energy Devel.,Inc. | Sugar Land, TX 77478 | Oil & Gas Operator | Jul 2007 |
| 26925 | Southwest Energy Development Inc | Bison, OK 73720 | Oil & Gas Operator | Dec 2025 |
| 26926 | Southwest Energy LP | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 26927 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 26928 | Southwest Gas Producing Co Inc | | Oil & Gas Operator | Nov 1994 |
| 26929 | Southwest Gas St | | Oil & Gas Operator | Dec 1981 |
| 26930 | Southwest Gas Storage Company | | Gas Operator | Dec 2025 |
| 26931 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 2026 |
| 26932 | Southwest Gathering Company | Alice, TX 78332 | Oil & Gas Operator | Apr 2026 |
| 26933 | Southwest General Dev., Inc. | | Oil & Gas Operator | Dec 2003 |
| 26934 | Southwest Land & Minerals, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Aug 2003 |
| 26935 | Southwest Loop 1604, LTD. | San Antonio, TX 78209 | Oil Operator | Sep 2022 |
| 26936 | Southwest Mississippi Oil & Gas LLC. | | Oil Operator | Feb 2026 |
| 26937 | Southwest Oil & Land, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 1999 |
| 26938 | Southwest Oil Properties, Inc. | | Oil & Gas Operator | Feb 1996 |
| 26939 | Southwest Operating Company | Overland Park, KS 66212 | Oil & Gas Operator | Mar 2012 |
| 26940 | Southwest Operating Inc. | | Oil & Gas Operator | Dec 2024 |
| 26941 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Apr 2026 |
| 26942 | Southwest Petroleum | San Antonio, TX 78253 | Oil & Gas Operator | Apr 2026 |
| 26943 | Southwest Petroleum Corp | Drumright, OK 74030 | Oil & Gas Operator | Mar 2018 |
| 26944 | Southwest Petroleum Oil & Gas Explor LLC | San Bernardino, CA 92404-1010 | Oil & Gas Operator | Jun 2022 |
| 26945 | Southwest Production Co | Richardson, TX BADADDR | Oil & Gas Operator | Apr 1997 |
| 26946 | Southwest Resources, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Apr 2026 |
| 26947 | Southwest Rig Service | | Oil & Gas Operator | Nov 1998 |
| 26948 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 26949 | Southwest-Operating | Penwell, TX 79776 | Oil & Gas Operator | Apr 2026 |
| 26950 | Southwestern Electric Power Co | Dallas, TX 75266 | Oil & Gas Operator | Dec 1989 |
| 26951 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 26952 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Jan 2026 |
| 26953 | Southwestern Inc | Hobbs, NM 88240 | Oil Operator | Oct 2009 |
| 26954 | Southwestern Oil Corporation | Oklahoma City, OK 73106 | Oil & Gas Operator | Jan 2026 |
| 26955 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2026 |
| 26956 | Southwind Consulting | Pratt, KS 67124 | Oil Operator | Oct 1997 |
| 26957 | Southwind Exploration, LLC | Venice, FL 34293 | Oil & Gas Operator | Sep 2003 |
| 26958 | Southwind Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 26959 | Southwind Petroleum Corp. | Wichita, KS 67203 | Oil & Gas Operator | Jun 2022 |
| 26960 | Sovereign Eagle, LLC | Roswell, NM 88202 | Oil & Gas Operator | Jul 2018 |
| 26961 | Sovereign Energy Corp. | | Oil Operator | Dec 2001 |
| 26962 | Sovereign Operating Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2016 |
| 26963 | Sovereign Petroleum Company, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2013 |
| 26964 | Sowers William & Sara | Blue Rock, OH 43720 | Oil Operator | Dec 2022 |
| 26965 | Sowle Exploratio | | Oil Operator | Aug 1986 |
| 26966 | Sowle Explorations | | Oil Operator | Dec 2002 |
| 26967 | Soxgi LLC | Andrews, TX 79714 | Gas Operator | Jan 2026 |
| 26968 | Sozo Natural Resources LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 26969 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 26970 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2026 |
| 26971 | Spacht, James W. & Shelly F | Ripley, NY 14775 | Gas Operator | Dec 2024 |
| 26972 | Spade Energy L.L.C. | Fort Worth, TX 76177 | Oil & Gas Operator | Apr 2026 |
| 26973 | Spain Oil Company | Somerset, TX 78069 | Oil & Gas Operator | Apr 2026 |
| 26974 | Spalding Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 26975 | Spalsbury, Arthur L | Hays, KS 67601 | Oil Operator | Aug 2001 |
| 26976 | Spark'S Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Nov 2014 |
| 26977 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 26978 | Sparks Daniel M | Chickasha, OK 73023-1435 | Oil & Gas Operator | Apr 2014 |
| 26979 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | Dec 2025 |
| 26980 | Sparks Harold | Radnor, OH 43066 | Oil & Gas Operator | Dec 1987 |
| 26981 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Jan 2026 |
| 26982 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 26983 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Jan 2026 |
| 26984 | Sparks, Pearlman E | Mazie, KY 41160 | Oil Operator | Dec 2015 |
| 26985 | Sparks, Sidney A., Trustee | Alice, TX 78332 | Oil & Gas Operator | Jun 1996 |
| 26986 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Jan 2026 |
| 26987 | Sparrow Oil & Gas LLC | | Oil & Gas Operator | Mar 2026 |
| 26988 | Sparrow Operating LLC | Comanche, OK 73529-9747 | Oil Operator | Dec 2025 |
| 26989 | Sparta Energy Corp | Oak Brook, IL 60521 | Oil & Gas Operator | Dec 1985 |
| 26990 | Sparta Exploration LLC | Houston, TX 77279 | Oil & Gas Operator | Apr 2026 |
| 26991 | Spartagus Corporation | Grand Saline, TX 75140 | Oil & Gas Operator | Sep 2004 |
| 26992 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 26993 | Spartan Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 2013 |
| 26994 | Spartan Petroleum Corporation | Houston, TX 77079 | Oil & Gas Operator | Oct 1987 |
| 26995 | Spartan Resource MGMT Corp | Rural Valley, PA 16249-0326 | Gas Operator | Dec 2025 |
| 26996 | Spartan Resources LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2026 |
| 26997 | Spartan Royalties, LLC | | Oil Operator | Dec 2024 |
| 26998 | SPC Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2024 |
| 26999 | Spear Production Company, Inc. | Shreveport, LA 71161 | Oil Operator | Apr 2026 |
| 27000 | Spearco Oil | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |