| 28001 | Squaw Mountain Oil, LLC | Jacksboro, TX 76458 | Oil Operator | Dec 2025 |
| 28002 | Squirrel Oil & Gas Inc | Tonkawa, OK 74653 | Oil & Gas Operator | Mar 2022 |
| 28003 | Squyres Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 28004 | SR Production Corp. | Liberty, TX 77575 | Oil & Gas Operator | Mar 2010 |
| 28005 | Sram Oil Incorporated | Winfield, KS 67156 | Oil & Gas Operator | Aug 2005 |
| 28006 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 28007 | SRP Production Corp. | | Oil & Gas Operator | Nov 1997 |
| 28008 | SRS Properties, LLC | Whitehouse, TX 75791 | Oil & Gas Operator | Dec 2025 |
| 28009 | SRV Oil Co | Coleman, TX 76834 | Oil Operator | Dec 2025 |
| 28010 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 28011 | SS Operating LLC | Water Valley, TX 76958 | Oil Operator | Dec 2025 |
| 28012 | SSB Production LC | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2025 |
| 28013 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Dec 2025 |
| 28014 | Ssi Energy LLC | | Oil & Gas Operator | Jul 2021 |
| 28015 | SSM Partnership-PV79 | | Oil Operator | Jun 1989 |
| 28016 | Ssouri Oil Ventures | | Oil Operator | Jan 2022 |
| 28017 | St Cleric Resources LLC | | Gas Operator | Oct 2025 |
| 28018 | St Croix LTD | Fairlawn, OH 44334 | Oil & Gas Operator | Dec 2022 |
| 28019 | St Croix Operating Inc | | Oil & Gas Operator | Oct 2025 |
| 28020 | St Joe Petroleum U S Corp | | Oil & Gas Operator | Aug 2000 |
| 28021 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 28022 | St Joseph Min Co | | Oil Operator | Dec 2023 |
| 28023 | St Michael Exploration | | Oil & Gas Operator | Jun 1987 |
| 28024 | St Oil Company | Denver, CO 80264-2101 | Oil & Gas Operator | Dec 2010 |
| 28025 | St Oil Company LLC | New York, NY 10005-4016 | Oil Operator | Oct 2025 |
| 28026 | St Petroleum, Inc. | Edgerton, KS 66021 | Oil Operator | Jun 2025 |
| 28027 | St. Cajetan Oil Company, LLC | Gainesville, TX 76240 | Oil & Gas Operator | Dec 2025 |
| 28028 | St. Clair Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Mar 2008 |
| 28029 | St. Clair Oil Co. | St Clairsville, OH 43950 | Oil & Gas Operator | Dec 1997 |
| 28030 | St. Columban'S On The Lake, Inc. | Silver Creek, NY 14136 | Gas Operator | Dec 2024 |
| 28031 | St. Croix Corporation | | Oil & Gas Operator | Apr 1990 |
| 28032 | St. James Oil Corporation | | Oil & Gas Operator | Dec 2009 |
| 28033 | St. Mary Energy Company | Houston, TX 77079 | Oil & Gas Operator | Aug 2008 |
| 28034 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 28035 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 28036 | St. Paul Oil And Gas Corp. | | Oil & Gas Operator | Aug 1991 |
| 28037 | Sta-Kel Incorporated | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 28038 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 28039 | Staab Energy & Leasing | | Oil Operator | May 2024 |
| 28040 | Staab Oil Co., A General Partnership | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 28041 | Staats & Martin | | Oil Operator | Aug 2013 |
| 28042 | Staats, William N | | Oil & Gas Operator | Jun 2025 |
| 28043 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Dec 2025 |
| 28044 | Stach Enterprises LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2021 |
| 28045 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Dec 2025 |
| 28046 | Stachler William L | Danville, OH 43014 | Oil & Gas Operator | Dec 1989 |
| 28047 | Stack Production | Dewey, OK 74029 | Oil & Gas Operator | Mar 2002 |
| 28048 | Stackhouse Construction Inc | Orwell, OH 44076 | Oil & Gas Operator | Dec 2024 |
| 28049 | Stacy Operating LLC | Cushing, OK 74023 | Oil & Gas Operator | Oct 2025 |
| 28050 | Stacy Reamy | Purdon, TX 76679 | Oil Operator | Dec 2025 |
| 28051 | Stafford, A C | | Oil Operator | Dec 2003 |
| 28052 | Stag Oil Producers Inc | Midland, TX 79701 | Oil & Gas Operator | Jan 1998 |
| 28053 | Stagecoach Pipeline & Storage Company LLC | | Gas Operator | Dec 2005 |
| 28054 | Stagg Investment Group, Inc. | Midland, TX 79701 | Oil Operator | May 2013 |
| 28055 | Staggered T Oil LLC | Quanah, TX 79252 | Oil Operator | Dec 2025 |
| 28056 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 28057 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Oct 2025 |
| 28058 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Oct 2025 |
| 28059 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 28060 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 28061 | Stal Oil Production, L.L.C. | Argyle, TX 76226 | Oil Operator | Dec 2025 |
| 28062 | Stalcup Oil Comp | | Oil Operator | Dec 1992 |
| 28063 | Stalcup Oil Company | | Oil Operator | Oct 2009 |
| 28064 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 28065 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 28066 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 28067 | Stalica, Donald E. | Pavilion, NY 14525 | Gas Operator | Dec 2024 |
| 28068 | Stalking Horse Energy, Limited Liability Company | Houston, TX 77062 | Oil & Gas Operator | Dec 2025 |
| 28069 | Stalking Horse Energy, LLC | Denver, CO 80246 | Oil Operator | Sep 2025 |
| 28070 | Stallings Eugene | | Oil Operator | Jul 1994 |
| 28071 | Stallion Energy LLC | Houston, TX 77090 | Oil & Gas Operator | Oct 2009 |
| 28072 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 28073 | Stallion Oil Company | Lafayette, LA 70505 | Oil & Gas Operator | Jun 2004 |
| 28074 | Stallion Oil Corporation | | Oil & Gas Operator | Nov 1987 |
| 28075 | Stallion Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 28076 | Stalnaker Energy Corporation | | Oil & Gas Operator | Dec 2021 |
| 28077 | Stalnaker Oil Company | Maud, OK 74854-0295 | Oil Operator | May 2017 |
| 28078 | Stalnaker, William K | | Oil & Gas Operator | Dec 2008 |
| 28079 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 28080 | Stamic Oil LLC | Duncan, OK 73534-1898 | Oil & Gas Operator | Oct 2021 |
| 28081 | Stampede Energy Corp. | Canada, 00100 | Oil & Gas Operator | Mar 2000 |
| 28082 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |
| 28083 | Stanco Petroleum Inc | Kimball, NE 69145 | Oil & Gas Operator | Jul 1999 |
| 28084 | Standard Alaska Production Company | | Oil & Gas Operator | Dec 1987 |
| 28085 | Standard Oil Co Of Calif | | Oil & Gas Operator | Dec 1983 |
| 28086 | Standard Oil Co Of WV | Walton, WV 25286 | Oil & Gas Operator | Dec 2024 |
| 28087 | Standard Oil Company, Inc. | Parkesburg, WV 26103 | Oil & Gas Operator | Mar 2022 |
| 28088 | Standard Oil Of Kentucky, Inc | | Oil Operator | Dec 2022 |
| 28089 | Standard Oil Tools, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Dec 2025 |
| 28090 | Standard Operating Company | Wichita, KS 67205 | Oil & Gas Operator | Jun 2025 |
| 28091 | Standard Operating Company, LLC | | Oil & Gas Operator | May 2022 |
| 28092 | Standard Operating Inc | | Oil Operator | Jun 1986 |
| 28093 | Standard Production | | Oil Operator | Oct 1997 |
| 28094 | Standard Resources Corp. | Houston, TX 77063 | Oil & Gas Operator | Dec 2025 |
| 28095 | Standard Silver Corp | Richardson, TX 750801946 | Gas Operator | Aug 2024 |
| 28096 | Standby Farms | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 28097 | Standing Bear Petroleum Inc. | | Oil & Gas Operator | Dec 2005 |
| 28098 | Standley* Robert K Dba Otis Energy | | Oil Operator | Jan 2023 |
| 28099 | Stanlee Oil LLC | | Oil Operator | Jun 2025 |
| 28100 | Stanley Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Aug 2004 |