| 2001 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 2002 | SS Operating LLC | Water Valley, TX 76958 | Oil Operator | Apr 2024 |
| 2003 | SSB Production LC | Ardmore, OK 73402-0998 | Oil & Gas Operator | Jan 2024 |
| 2004 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2024 |
| 2005 | Ssi Energy LLC | | Oil & Gas Operator | Jul 2021 |
| 2006 | SSM Partnership-PV79 | | Oil Operator | Jun 1989 |
| 2007 | Ssouri Oil Ventures | | Oil Operator | Jan 2022 |
| 2008 | St Croix LTD | Fairlawn, OH 44334 | Oil & Gas Operator | Dec 2022 |
| 2009 | St Croix Operating Inc | | Oil Operator | Jan 2024 |
| 2010 | St James Energy Operating Inc | | Oil & Gas Operator | Aug 2013 |
| 2011 | St Michael Exploration | | Oil & Gas Operator | Jun 1987 |
| 2012 | St Oil Company | Denver, CO 80264-2101 | Oil & Gas Operator | Dec 2010 |
| 2013 | St Oil Company LLC | | Oil Operator | Jan 2024 |
| 2014 | St Petroleum, Inc. | Edgerton, KS 66021 | Oil Operator | Dec 2023 |
| 2015 | St. Cajetan Oil Company, LLC | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2024 |
| 2016 | St. Clair Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Mar 2008 |
| 2017 | St. Clair Oil Co. | St Clairsville, OH 43950 | Oil & Gas Operator | Dec 1997 |
| 2018 | St. Columban'S On The Lake, Inc. | Silver Creek, NY 14136 | Gas Operator | Dec 2022 |
| 2019 | St. Croix Corporation | | Oil & Gas Operator | Apr 1990 |
| 2020 | St. James Oil Corporation | | Oil & Gas Operator | Dec 2009 |
| 2021 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 2022 | St. Mary Energy Company | Houston, TX 77079 | Oil & Gas Operator | Aug 2008 |
| 2023 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 2024 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 2025 | St. Paul Oil And Gas Corp. | | Oil & Gas Operator | Aug 1991 |
| 2026 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 2027 | Staab Energy & Leasing | | Oil Operator | Jan 2023 |
| 2028 | Staab Oil Co., A General Partnership | Hays, KS 67601 | Oil Operator | Dec 2023 |
| 2029 | Staats & Martin | | Oil Operator | Aug 2013 |
| 2030 | Staats, William N | | Oil & Gas Operator | Dec 2023 |
| 2031 | Stable Energy L.L.C. | | Oil Operator | Dec 2023 |
| 2032 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Apr 2024 |
| 2033 | Stach Enterprises LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2021 |
| 2034 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Apr 2024 |
| 2035 | Stachler William L | Danville, OH 43014 | Oil & Gas Operator | Dec 1989 |
| 2036 | Stack Production | Dewey, OK 74029 | Oil & Gas Operator | Mar 2002 |
| 2037 | Stackhouse Construction Inc | Orwell, OH 44076 | Oil & Gas Operator | Dec 2023 |
| 2038 | Stacy Operating LLC | Cushing, OK 74023-0511 | Oil & Gas Operator | Dec 2023 |
| 2039 | Stacy Reamy | Purdon, TX 76679 | Oil Operator | Apr 2024 |
| 2040 | Stafford, A C | | Oil Operator | Dec 2003 |
| 2041 | Stag Oil Producers Inc | Midland, TX 79701 | Oil & Gas Operator | Jan 1998 |
| 2042 | Stagecoach Pipeline & Storage Company LLC | | Gas Operator | Dec 2005 |
| 2043 | Stagg Investment Group, Inc. | Midland, TX 79701 | Oil Operator | May 2013 |
| 2044 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2023 |
| 2045 | Staghorn Petroleum II LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 2046 | Staghorn Petroleum LLC | | Oil & Gas Operator | Dec 2023 |
| 2047 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 2048 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 2049 | Stal Oil Production, L.L.C. | Argyle, TX 76226 | Oil Operator | Apr 2024 |
| 2050 | Stalcup Oil Comp | | Oil Operator | Dec 1992 |
| 2051 | Stalcup Oil Company | | Oil Operator | Oct 2009 |
| 2052 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 2053 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jul 2021 |
| 2054 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 2055 | Stalica, Donald E. | Pavilion, NY 14525 | Gas Operator | Dec 2022 |
| 2056 | Stalking Horse Energy, Limited Liability Company | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 2057 | Stalking Horse Energy, LLC | Denver, CO 80246 | Oil Operator | Dec 2023 |
| 2058 | Stallings Eugene | | Oil Operator | Jul 1994 |
| 2059 | Stallion Energy LLC | Houston, TX 77090 | Oil & Gas Operator | Oct 2009 |
| 2060 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 2061 | Stallion Inc. | Hurricane, WV 25526 | Oil & Gas Operator | Dec 2021 |
| 2062 | Stallion Oil Company | Lafayette, LA 70505 | Oil & Gas Operator | Jun 2004 |
| 2063 | Stallion Oil Corporation | | Oil & Gas Operator | Nov 1987 |
| 2064 | Stallion Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 2065 | Stalnaker Energy Corporation | | Oil & Gas Operator | Dec 2021 |
| 2066 | Stalnaker Oil Company | Maud, OK 74854-0295 | Oil Operator | May 2017 |
| 2067 | Stalnaker, William K | | Oil & Gas Operator | Dec 2008 |
| 2068 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 2069 | Stamic Oil LLC | Duncan, OK 73534-1898 | Oil & Gas Operator | Oct 2021 |
| 2070 | Stampede Energy Corp. | Canada, 00100 | Oil & Gas Operator | Mar 2000 |
| 2071 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2024 |
| 2072 | Stanco Petroleum Inc | Kimball, NE 69145 | Oil & Gas Operator | Jul 1999 |
| 2073 | Standard Alaska Production Company | | Oil & Gas Operator | Dec 1987 |
| 2074 | Standard Energy Inc | | Oil Operator | Feb 1997 |
| 2075 | Standard Oil Co Of Calif | | Oil & Gas Operator | Dec 1983 |
| 2076 | Standard Oil Co Of WV | Parkersburg, WV 26103 | Oil & Gas Operator | Dec 2022 |
| 2077 | Standard Oil Company, Inc. | Parkesburg, WV 26103 | Oil & Gas Operator | Mar 2022 |
| 2078 | Standard Oil Of Kentucky, Inc | | Oil Operator | Dec 2022 |
| 2079 | Standard Operating Company | Wichita, KS 67205 | Oil & Gas Operator | Dec 2023 |
| 2080 | Standard Operating Company, LLC | | Oil & Gas Operator | May 2022 |
| 2081 | Standard Operating Inc | | Oil Operator | Jun 1986 |
| 2082 | Standard Production | | Oil Operator | Oct 1997 |
| 2083 | Standard Resources Corp. | Houston, TX 77063 | Oil & Gas Operator | Sep 2002 |
| 2084 | Standby Farms | Louisville, OH 44641 | Oil & Gas Operator | Dec 2022 |
| 2085 | Standing Bear Petroleum Inc. | | Oil & Gas Operator | Dec 2005 |
| 2086 | Standley* Robert K Dba Otis Energy | | Oil Operator | Jan 2023 |
| 2087 | Stanoco Oil Co | Central City, KY 42330 | Oil & Gas Operator | Dec 2021 |
| 2088 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 2089 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 2090 | Stanolind Operating LLC Dba Stanolind NM LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2014 |
| 2091 | Stanolind Permian LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 2092 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 2093 | Stanolind SJ LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2018 |
| 2094 | Stanotex, LLC | Katy, TX 77494 | Oil & Gas Operator | Apr 2024 |
| 2095 | Stanton Joni Dba Stanton Oil | | Oil Operator | Dec 2023 |
| 2096 | Stanton Leo F & Leo H | Wynona, OK 74084 | Oil & Gas Operator | Jun 1999 |
| 2097 | Stanton Mineral Development Inc | Austin, TX 78759 | Oil & Gas Operator | Apr 2024 |
| 2098 | Staples, James W. | Tuleta, TX 78162 | Oil & Gas Operator | Sep 2014 |
| 2099 | Staples, James W. Prod. Co. | Tuleta, TX 78162 | Oil & Gas Operator | Apr 2024 |
| 2100 | Staples, Tommy Oil Co. | Pettus, TX 78146 | Oil & Gas Operator | Mar 2008 |