| 26901 | Skeet Oil Production LLC | Grady, OK 73569 | Oil Operator | May 2025 |
| 26902 | Skeeter Oil L.L.C. | Big Spring, TX 79720 | Oil Operator | Jul 2025 |
| 26903 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 26904 | Skelton Operating Co., Inc. | | Oil & Gas Operator | Aug 1980 |
| 26905 | Skelton, D.W. | | Oil Operator | Dec 1952 |
| 26906 | Skewes Operating Company | Bluefield, VA 24605 | Oil & Gas Operator | Jul 2025 |
| 26907 | Ski Production, LLC | Muenster, TX 76252 | Oil Operator | Jul 2025 |
| 26908 | Skidgel Enterprises Inc | Rawlins, WY 82301 | Oil & Gas Operator | Sep 2018 |
| 26909 | Skidmore Energy,Inc. | Salado, TX 76571 | Oil & Gas Operator | Jun 1999 |
| 26910 | Skidmore Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jul 1997 |
| 26911 | Skidmore, James E. | Nocona, TX 76255 | Oil & Gas Operator | Nov 2008 |
| 26912 | Skinner Cattle, Inc. | Nocona, TX 76255 | Oil Operator | Jul 2025 |
| 26913 | Skinner Corporation | | Oil Operator | Apr 1985 |
| 26914 | Skinner Energy Management, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jan 2011 |
| 26915 | Skinner Oil & Gas LLC | Gillette, WY 82717 | Oil & Gas Operator | Jan 2024 |
| 26916 | Skinner'S Resources & Expl Inc | | Oil & Gas Operator | Jun 2007 |
| 26917 | Skinner, Robert V. | Spearman, TX 79081 | Oil & Gas Operator | Aug 2008 |
| 26918 | Skinner, W. E. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2025 |
| 26919 | Skinnergy Co. | Spearman, TX 79081 | Oil & Gas Operator | Jul 2025 |
| 26920 | Skipworth, Joseph D | | Oil Operator | Dec 2021 |
| 26921 | SKKM Oil Company | | Oil Operator | Dec 1992 |
| 26922 | Sklar | | Oil & Gas Operator | Dec 2024 |
| 26923 | Sklar & Phillips - Harry Hurt | | Oil & Gas Operator | Jul 1986 |
| 26924 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 26925 | Sklar & Phillips Oil Co.-Entex | | Oil & Gas Operator | Aug 1978 |
| 26926 | Sklar &Phillips-Great Southern | | Oil & Gas Operator | Aug 1980 |
| 26927 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 26928 | Sklar-Tex L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 26929 | Skora, James B. | Lawtons, NY 14091 | Gas Operator | Dec 2024 |
| 26930 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 26931 | Skrzynski, Thomas J. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 26932 | SKS Oil | Olney, TX 76374 | Oil & Gas Operator | Jul 2025 |
| 26933 | Skubis, Daniel J. | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 26934 | Skull Creek A LLC | Douglas, WY 82633 | Oil & Gas Operator | Apr 2025 |
| 26935 | Skull Creek Oil & Gas LLC | | Oil Operator | Apr 2025 |
| 26936 | Sky Development Corporation | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 26937 | Sky Oil, L.L.C. | St. Paul, KS 66771 | Oil Operator | Dec 2004 |
| 26938 | Sky Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 26939 | Skybox, LLC | | Gas Operator | Dec 2021 |
| 26940 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2025 |
| 26941 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2025 |
| 26942 | Skye MS, LLC | | Oil & Gas Operator | May 2025 |
| 26943 | Skyhawk Energy, LLC | | Oil Operator | Dec 2024 |
| 26944 | Skyline Oil Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Jan 1987 |
| 26945 | Skyline Operating Company, LLC | Alpine, UT 84004 | Oil & Gas Operator | May 2025 |
| 26946 | Skyliner Energy LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2024 |
| 26947 | Skytop Oil & Gas | Giddings, TX 78942 | Oil & Gas Operator | Jul 2025 |
| 26948 | Skyway Energy LLC | Leesburg, OH 34748 | Oil & Gas Operator | Dec 2020 |
| 26949 | SKZ Inc. | | Oil Operator | Mar 1988 |
| 26950 | Slack Oil & Gas | Refugio, TX 78377 | Oil & Gas Operator | Dec 2012 |
| 26951 | Slack, R. C. | Pecos, TX 79772 | Oil & Gas Operator | Jul 2000 |
| 26952 | Slagel, H. P. Prod. Co. | Snyder, TX 79550 | Oil & Gas Operator | Dec 2006 |
| 26953 | Slam Resources, Inc. | | Oil & Gas Operator | Apr 1994 |
| 26954 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Jul 2025 |
| 26955 | Slapco - Emerald Exploration | | Gas Operator | Sep 1979 |
| 26956 | Slape Oil Company, Inc. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 26957 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2025 |
| 26958 | Slate River Resources LLC | Denver, CO 80293 | Oil & Gas Operator | Apr 2008 |
| 26959 | Slatex Well Service, Inc. | Batson, TX 77519 | Oil Operator | Jul 2025 |
| 26960 | Slaughter J M Oil Company | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2001 |
| 26961 | Slaughter, Norman C. | | Oil & Gas Operator | Dec 2012 |
| 26962 | Slavens II Paul R | Tulsa, OK 74131 | Oil & Gas Operator | May 2025 |
| 26963 | Slawson Clifford Ray | Healdton, OK 73438 | Oil Operator | Jan 1995 |
| 26964 | Slawson Explorat | | Oil & Gas Operator | Dec 1996 |
| 26965 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 26966 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 26967 | Slayton Resources Inc | Roswell, NM 88202 | Oil & Gas Operator | May 2025 |
| 26968 | Sledge Bros. Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Mar 2016 |
| 26969 | Sledge Olen | Duncan, OK 73533 | Oil Operator | Mar 2025 |
| 26970 | Sledge, H. G., Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2016 |
| 26971 | Sleeth And Brooks Oil Co. | | Oil Operator | Jul 1989 |
| 26972 | Slick Inc. | MC Gregor, TX 76657 | Oil Operator | Jul 2025 |
| 26973 | Slick Production Inc | Tulsa, OK 74132-1718 | Oil & Gas Operator | Apr 2020 |
| 26974 | Slick Production, LLC | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 26975 | Slik-Dril P & A Inc | | Oil & Gas Operator | Sep 1989 |
| 26976 | Slik-Dril, Inc | | Oil & Gas Operator | Nov 1998 |
| 26977 | Slim Hole Inc | Farmington, NM 87401-7725 | Oil & Gas Operator | May 2013 |
| 26978 | Slingshot Oil & Gas | Houston, TX 77019 | Oil Operator | Jul 2025 |
| 26979 | Slinkard, Roberta S | | Oil Operator | Mar 2025 |
| 26980 | Sliverville Oil Co LLC | Bradford, PA 16701-2770 | Oil & Gas Operator | Dec 2024 |
| 26981 | SLMW Energy Comp | | Oil Operator | Jan 1989 |
| 26982 | Slo Oil, LLC | El Dorado, KS 67042 | Oil Operator | Nov 2024 |
| 26983 | Sloan Oil Corporation | Humble, TX 77347 | Oil & Gas Operator | Mar 2015 |
| 26984 | Sloan Operations | | Oil Operator | Mar 2025 |
| 26985 | Sloan Petroleum Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 26986 | Sloan Petroleum Service Inc | Guthrie, OK 73044 | Oil & Gas Operator | May 2025 |
| 26987 | Sloan Production Co | | Oil Operator | Jan 2013 |
| 26988 | Slohcin, Inc. | Shelby, MT 59474 | Oil Operator | Apr 2025 |
| 26989 | Slone Energy, LLC | Oil Springs, KY 41238 | Oil & Gas Operator | Dec 2023 |
| 26990 | Slone, VIctor R | | Oil Operator | Apr 2024 |
| 26991 | Slow Poke Production-George L. Dobson Dba | Cut Bank, MT 59427 | Gas Operator | Mar 2025 |
| 26992 | Slow Stroke Productions LLC | | Oil Operator | Apr 2025 |
| 26993 | SLS Operating LLC | Seminole, OK 74868-5876 | Oil & Gas Operator | Apr 2025 |
| 26994 | SLT Dakota Operating, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jul 2025 |
| 26995 | SLT Production LLC | Sheffield, PA 16347-0547 | Oil & Gas Operator | Dec 2024 |
| 26996 | SM Energy | Denver, CO 80203-4361 | Gas Operator | Feb 2015 |
| 26997 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 26998 | SM Oil & Gas Inc | Skiatook, OK 74070 | Oil & Gas Operator | Apr 2025 |
| 26999 | SM Operating Company LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 27000 | SM&O LLC | | Oil & Gas Operator | Apr 2025 |