| 2001 | Springfield Oil Services, Inc. | Mamaroneck, NY 10543 | Oil & Gas Operator | Jul 2026 |
| 2002 | Springline Operating LLC | | Oil & Gas Operator | May 2026 |
| 2003 | Springs, Jesse | Luling, TX 78648 | Oil & Gas Operator | Jun 1998 |
| 2004 | Springville-Griffith Institute Central School Dist | Springville, NY 14141 | Gas Operator | Dec 2025 |
| 2005 | Sproul, C. R. Inc. | Eldorado, TX 76936 | Oil & Gas Operator | Aug 2000 |
| 2006 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Jul 2026 |
| 2007 | SPS, Inc. | Cheney, KS 67025 | Oil & Gas Operator | Mar 2026 |
| 2008 | Spur Energy | Midland, TX 79708 | Oil & Gas Operator | Mar 1996 |
| 2009 | Spur Energy Partners LLC | Houston, TX 77024 | Oil & Gas Operator | May 2026 |
| 2010 | Spur Operating Co. | Austin, TX 78701 | Oil & Gas Operator | Jul 2026 |
| 2011 | Spurgeon William Allan | Nowata, OK 74048-9713 | Oil Operator | Feb 2010 |
| 2012 | Spurgeon William C & Tammy D | Hominy, OK 74035 | Oil & Gas Operator | Apr 2026 |
| 2013 | Spyglass Cedar Creek, LP | | Gas Operator | Jul 2012 |
| 2014 | Spyglass Oil & Gas LLC | | Oil & Gas Operator | Dec 2024 |
| 2015 | Square Mile Energy, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Jul 2026 |
| 2016 | Square One Corporation | Giddings, TX 78942 | Oil & Gas Operator | Dec 2012 |
| 2017 | Square One Energy, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Oct 2015 |
| 2018 | Squaw Mountain Oil, LLC | Jacksboro, TX 76458 | Oil Operator | Jul 2026 |
| 2019 | Squirrel Oil & Gas Inc | Tonkawa, OK 74653 | Oil & Gas Operator | Mar 2022 |
| 2020 | Squyres Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 2021 | SR Production Corp. | Liberty, TX 77575 | Oil & Gas Operator | Mar 2010 |
| 2022 | Sram Oil Incorporated | Winfield, KS 67156 | Oil & Gas Operator | Aug 2005 |
| 2023 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 2024 | SRP Production Corp. | | Oil & Gas Operator | Nov 1997 |
| 2025 | SRS Properties, LLC | Whitehouse, TX 75791 | Oil & Gas Operator | Jul 2026 |
| 2026 | SRV Oil Co | Coleman, TX 76834 | Oil Operator | Jul 2026 |
| 2027 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 2028 | SS Operating LLC | Water Valley, TX 76958 | Oil Operator | Jul 2026 |
| 2029 | SSB Production LC | Ardmore, OK 73401 | Oil & Gas Operator | Apr 2026 |
| 2030 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Jul 2026 |
| 2031 | Ssi Energy LLC | | Oil & Gas Operator | Jul 2021 |
| 2032 | SSM Partnership-PV79 | | Oil Operator | Jun 1989 |
| 2033 | Ssouri Oil Ventures | | Oil Operator | Jan 2022 |
| 2034 | St Cleric Resources LLC | | Gas Operator | May 2026 |
| 2035 | St Croix LTD | Fairlawn, OH 44334 | Oil & Gas Operator | Dec 2022 |
| 2036 | St Croix Operating Inc | | Oil & Gas Operator | Apr 2026 |
| 2037 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 2038 | St Michael Exploration | | Oil & Gas Operator | Jun 1987 |
| 2039 | St Oil Company | Denver, CO 80264-2101 | Oil & Gas Operator | Dec 2010 |
| 2040 | St Oil Company LLC | New York, NY 10005-4016 | Oil Operator | Apr 2026 |
| 2041 | St Petroleum, Inc. | Edgerton, KS 66021 | Oil Operator | Mar 2026 |
| 2042 | St. Cajetan Oil Company, LLC | Gainesville, TX 76240 | Oil & Gas Operator | Jul 2026 |
| 2043 | St. Clair Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Mar 2008 |
| 2044 | St. Clair Oil Co. | St Clairsville, OH 43950 | Oil & Gas Operator | Dec 1997 |
| 2045 | St. Columban'S On The Lake, Inc. | Silver Creek, NY 14136 | Gas Operator | Dec 2025 |
| 2046 | St. Croix Corporation | | Oil & Gas Operator | Apr 1990 |
| 2047 | St. James Oil Corporation | | Oil & Gas Operator | Dec 2009 |
| 2048 | St. Mary Energy Company | Houston, TX 77079 | Oil & Gas Operator | Aug 2008 |
| 2049 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 2050 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 2051 | St. Paul Oil And Gas Corp. | | Oil & Gas Operator | Aug 1991 |
| 2052 | Sta-Kel Incorporated | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 2053 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 2054 | Staab Energy & Leasing | | Oil Operator | Sep 2025 |
| 2055 | Staab Oil Co., A General Partnership | Hays, KS 67601 | Oil Operator | Mar 2026 |
| 2056 | Staats & Martin | | Oil Operator | Aug 2013 |
| 2057 | Staats, William N | | Oil & Gas Operator | Apr 2026 |
| 2058 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Jul 2026 |
| 2059 | Stach Enterprises LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2021 |
| 2060 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Jul 2026 |
| 2061 | Stachler William L | Danville, OH 43014 | Oil & Gas Operator | Dec 1989 |
| 2062 | Stack Production | Dewey, OK 74029 | Oil & Gas Operator | Mar 2002 |
| 2063 | Stackhouse Construction Inc | Orwell, OH 44076 | Oil & Gas Operator | Dec 2025 |
| 2064 | Stacy Operating LLC | Cushing, OK 74023 | Oil & Gas Operator | Apr 2026 |
| 2065 | Stacy Reamy | Purdon, TX 76679 | Oil Operator | Jul 2026 |
| 2066 | Stafford, A C | | Oil Operator | Dec 2003 |
| 2067 | Stag Oil Producers Inc | Midland, TX 79701 | Oil & Gas Operator | Jan 1998 |
| 2068 | Stagecoach Pipeline & Storage Company LLC | | Gas Operator | Dec 2005 |
| 2069 | Stagg Investment Group, Inc. | Midland, TX 79701 | Oil Operator | May 2013 |
| 2070 | Staggered T Oil LLC | Quanah, TX 79252 | Oil Operator | Jul 2026 |
| 2071 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 2072 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | May 2026 |
| 2073 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Apr 2026 |
| 2074 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 2075 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 2076 | Stal Oil Production, L.L.C. | Argyle, TX 76226 | Oil Operator | Jul 2026 |
| 2077 | Stalcup Oil Comp | | Oil Operator | Dec 1992 |
| 2078 | Stalcup Oil Company | | Oil Operator | Oct 2009 |
| 2079 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 2080 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 2081 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 2082 | Stalica, Donald E. | Pavilion, NY 14525 | Gas Operator | Dec 2025 |
| 2083 | Stalking Horse Energy, Limited Liability Company | Houston, TX 77062 | Oil & Gas Operator | Jul 2026 |
| 2084 | Stalking Horse Energy, LLC | Houston, TX 77062 | Oil Operator | Apr 2026 |
| 2085 | Stallings Eugene | | Oil Operator | Jul 1994 |
| 2086 | Stallion Energy LLC | Houston, TX 77090 | Oil & Gas Operator | Oct 2009 |
| 2087 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 2088 | Stallion Oil Company | Lafayette, LA 70505 | Oil & Gas Operator | Jun 2004 |
| 2089 | Stallion Oil Corporation | | Oil & Gas Operator | Nov 1987 |
| 2090 | Stallion Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2026 |
| 2091 | Stalnaker Energy Corporation | | Oil & Gas Operator | Dec 2021 |
| 2092 | Stalnaker Oil Company | Maud, OK 74854-0295 | Oil Operator | May 2017 |
| 2093 | Stalnaker, William K | | Oil & Gas Operator | Dec 2008 |
| 2094 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 2095 | Stamic Oil LLC | Duncan, OK 73534-1898 | Oil & Gas Operator | Oct 2021 |
| 2096 | Stampede Energy Corp. | Canada, 00100 | Oil & Gas Operator | Mar 2000 |
| 2097 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2026 |
| 2098 | Stanco Petroleum Inc | Kimball, NE 69145 | Oil & Gas Operator | Jul 1999 |
| 2099 | Standard Alaska Production Company | | Oil & Gas Operator | Dec 1987 |
| 2100 | Standard Oil Co Of Calif | | Oil & Gas Operator | Dec 1983 |