| 28001 | Summitt Resources | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2008 |
| 28002 | Sumner Energy Inc | | Oil & Gas Operator | Jul 2024 |
| 28003 | Sumpf-Williams | | Gas Operator | Dec 1980 |
| 28004 | Sumrall Sharon | Midland, TX 79705-8238 | Oil & Gas Operator | Apr 2022 |
| 28005 | Sun Coulee, LLC | Martinsdale, MT 59053 | Oil Operator | Aug 2024 |
| 28006 | Sun Explor & Production Co | Oklahoma City, OK 73126 | Gas Operator | Oct 1984 |
| 28007 | Sun Exploration Co, Inc | | Oil Operator | Dec 2010 |
| 28008 | Sun Exploration, Inc. | Alice, TX 78332 | Oil & Gas Operator | Nov 2024 |
| 28009 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 28010 | Sun Mountain Oil & Gas | | Oil & Gas Operator | Dec 2020 |
| 28011 | Sun Oil Company | Arlington, TX 76006 | Oil & Gas Operator | Dec 2021 |
| 28012 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 28013 | Sun Resources Texas, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jun 2024 |
| 28014 | Sun River Operating, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Nov 2024 |
| 28015 | Sun Texas Company | | Oil & Gas Operator | Jun 1981 |
| 28016 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 28017 | Sun-Key Oil Co., Inc. | Dublin, TX 76446 | Oil & Gas Operator | Nov 2024 |
| 28018 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 28019 | Sunbelt Salvage | Eastland, TX 76448 | Oil & Gas Operator | Sep 1998 |
| 28020 | Sunburst Explora | | Oil Operator | May 1990 |
| 28021 | Sunburst Exploration, Inc. | | Oil & Gas Operator | Jul 2000 |
| 28022 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Aug 2024 |
| 28023 | Sunbury-Trenton Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1988 |
| 28024 | Sunchase Exploration, Inc. | | Oil & Gas Operator | Oct 1997 |
| 28025 | Suncoast Investments Co., Inc. | Plano, TX 75074 | Oil & Gas Operator | Oct 2001 |
| 28026 | Suncoast Technical Service Inc | Plano, TX 75074-5438 | Oil Operator | Mar 2005 |
| 28027 | Suncoast Technical Services Inc | Dallas, TX 75251 | Oil & Gas Operator | Nov 2024 |
| 28028 | Suncoast Technical SVCS., Inc. | | Oil & Gas Operator | Dec 2011 |
| 28029 | Suncor Energy Natural Gas America Inc | Greenwood VIllage, CO 80111 | Gas Operator | Feb 2010 |
| 28030 | Sundance Consulting Corp. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2024 |
| 28031 | Sundance Energy Corporation | | Oil & Gas Operator | Jul 2024 |
| 28032 | Sundance Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2014 |
| 28033 | Sundance Energy Oklahoma LLC Dba Seo LLC | Denver, CO 80202-3620 | Oil & Gas Operator | Nov 2021 |
| 28034 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 28035 | Sundance Oil Exploration Co | | Oil Operator | Mar 1986 |
| 28036 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 28037 | Sundance Operating Co | | Oil & Gas Operator | Jul 2016 |
| 28038 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 28039 | Sunday Corporation | Olney, TX 76374 | Oil & Gas Operator | Nov 2024 |
| 28040 | Sunday-Smith Mary E | Mannford, OK 74044-1457 | Oil & Gas Operator | Mar 2015 |
| 28041 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 28042 | Sundial Energy LLC | Oklahoma City, OK 73013 | Oil & Gas Operator | Sep 2024 |
| 28043 | Sundial Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 28044 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Nov 2024 |
| 28045 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2024 |
| 28046 | Sundown Permian LP | Dallas, TX 75248 | Oil & Gas Operator | Oct 2018 |
| 28047 | Sunergon Oil Operating, LLC | Gainesville, TX 76240 | Oil Operator | Nov 2024 |
| 28048 | Sunex Resources Incorporated | | Oil Operator | Dec 1981 |
| 28049 | Sunfield Energy Company | Houston, TX 77084-5113 | Oil & Gas Operator | Jul 1999 |
| 28050 | Sunfire Energy | | Oil & Gas Operator | Jul 2024 |
| 28051 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 28052 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Jul 2024 |
| 28053 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Jun 2024 |
| 28054 | Sunland Enterprises Corp | Norman, OK 73071 | Oil Operator | Sep 2004 |
| 28055 | Sunland Production Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2024 |
| 28056 | Sunlight Exploration, Inc. | Canyon, TX 79015 | Oil & Gas Operator | Nov 2024 |
| 28057 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 28058 | Sunny Shores Of Ohio Inc | Fountain Hills, AZ 85268 | Oil & Gas Operator | Dec 2008 |
| 28059 | Sunnybook Transmission Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 1992 |
| 28060 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 28061 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 28062 | Sunray DX Oil Co | | Gas Operator | Dec 1983 |
| 28063 | Sunray Energy, Inc. | Round Rock, TX 78683 | Oil & Gas Operator | Nov 2018 |
| 28064 | Sunray Oil Co., Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2013 |
| 28065 | Sunray Operating Company LLC | Sugar Land, TX 77498 | Oil & Gas Operator | Nov 2024 |
| 28066 | Sunray Petroleum Inc. | | Oil & Gas Operator | Aug 2024 |
| 28067 | Sunray-Taylor, Inc. | Midland, TX 79701 | Oil & Gas Operator | Nov 1993 |
| 28068 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 28069 | Sunrise Enterprises | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 28070 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 28071 | Sunrise Oil, LTD. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2004 |
| 28072 | Sunset 2018, LLC | Farmington, NM 87401 | Oil & Gas Operator | Sep 2024 |
| 28073 | Sunset Energy L L C | Palm Harbor, FL 34683-3044 | Oil Operator | Dec 2007 |
| 28074 | Sunset Exploration Inc. | | Oil & Gas Operator | Aug 2024 |
| 28075 | Sunset Leases LLC | Ozona, TX 76943 | Oil Operator | Nov 2024 |
| 28076 | Sunset Well Service Holdings Inc | Midland, TX 79708 | Oil Operator | Apr 2013 |
| 28077 | Sunshine Oil & Gas, LLC | Madisonville, KY 42431 | Oil & Gas Operator | Dec 2022 |
| 28078 | Sunshine Valley Petroleum | Casper, WY 82605 | Oil & Gas Operator | Sep 2024 |
| 28079 | Sunstone Energy Company | Tulsa, OK 74153 | Oil & Gas Operator | Aug 2009 |
| 28080 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 28081 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 28082 | Sunwest Oklahoma, Inc | Dallas, TX 75231 | Oil & Gas Operator | May 2023 |
| 28083 | Sunwest Operating Company L.L.C. | Englewood, CO 80155 | Oil & Gas Operator | Aug 2002 |
| 28084 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | Nov 2024 |
| 28085 | Supa Energy, Inc. | Shamrock, TX 79079 | Oil & Gas Operator | Nov 2024 |
| 28086 | Super Energy Inc. | | Oil & Gas Operator | Oct 1993 |
| 28087 | Super Heaters LLC | Houston, TX 77242-1328 | Oil Operator | Mar 2022 |
| 28088 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Jun 2024 |
| 28089 | Superior - Austral | | Oil & Gas Operator | Apr 1978 |
| 28090 | Superior Companies Inc | Bartlesville, OK 74003-2621 | Oil & Gas Operator | May 2013 |
| 28091 | Superior Midstream, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 28092 | Superior Oil & Gas Company Of Oklahoma | Calumet, OK 73014-8528 | Oil & Gas Operator | Jan 2024 |
| 28093 | Superior Oil & Gas Invt, L.L.C. | Conroe, TX 77305 | Gas Operator | Jul 2018 |
| 28094 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Sep 2024 |
| 28095 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 28096 | Superior Oil Com | | Oil & Gas Operator | Dec 1994 |
| 28097 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | Nov 2023 |
| 28098 | Superior Operating LLC | | Oil Operator | Aug 2020 |
| 28099 | Superior Production LLC | Ringwood, OK 73768 | Oil & Gas Operator | Sep 2024 |
| 28100 | Superior Production MGMT Inc | Calumet, OK 73014 | Oil & Gas Operator | Mar 2015 |