| 28201 | Summit Gas Resources Inc | Sheridan, WY 82801 | Gas Operator | Dec 2023 |
| 28202 | Summit Oil & Gas LLC | | Oil & Gas Operator | May 2025 |
| 28203 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Apr 2025 |
| 28204 | Summit Overseas Expl., Inc. | Denver, CO 80226 | Oil & Gas Operator | Apr 2007 |
| 28205 | Summit Petroleum Corp And Muskegon Development C | | Oil Operator | Dec 2006 |
| 28206 | Summit Petroleum Corp Of MT Pleasant | | Oil & Gas Operator | Dec 2007 |
| 28207 | Summit Petroleum Inc | Twinsburg, OH 44087 | Oil & Gas Operator | Dec 2024 |
| 28208 | Summit Petroleum LLC | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 28209 | Summit Reed City Inc | | Oil Operator | Dec 2014 |
| 28210 | Summit Resources Management LLC | Edmond, OK 73083 | Oil & Gas Operator | Apr 2025 |
| 28211 | Summit Resources MGMT., LLC. | Edmond, OK 73083 | Oil & Gas Operator | Jul 2025 |
| 28212 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 28213 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Mar 2025 |
| 28214 | Summitt Resources | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2008 |
| 28215 | Sumner Energy Inc | | Oil & Gas Operator | Jun 2025 |
| 28216 | Sumpf-Williams | | Gas Operator | Dec 1980 |
| 28217 | Sumrall Sharon | Midland, TX 79705-8238 | Oil & Gas Operator | Apr 2022 |
| 28218 | Sun Coulee, LLC | Martinsdale, MT 59053 | Oil Operator | May 2025 |
| 28219 | Sun Explor & Production Co | Oklahoma City, OK 73126 | Gas Operator | Oct 1984 |
| 28220 | Sun Exploration Co, Inc | | Oil Operator | Dec 2010 |
| 28221 | Sun Exploration, Inc. | Alice, TX 78332 | Oil & Gas Operator | Jul 2025 |
| 28222 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 28223 | Sun Mountain Oil & Gas | | Oil & Gas Operator | Dec 2020 |
| 28224 | Sun Oil Company | Arlington, TX 76006 | Oil & Gas Operator | Dec 2021 |
| 28225 | Sun Resources Texas, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2024 |
| 28226 | Sun River Operating, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 28227 | Sun Texas Company | | Oil & Gas Operator | Jun 1981 |
| 28228 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 28229 | Sun-Key Oil Co., Inc. | Dublin, TX 76446 | Oil & Gas Operator | Jul 2025 |
| 28230 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 28231 | Sunbelt Oil Investments Inc | Lindsay, OK 73052 | Oil & Gas Operator | May 1993 |
| 28232 | Sunbelt Salvage | Eastland, TX 76448 | Oil & Gas Operator | Sep 1998 |
| 28233 | Sunburst Explora | | Oil Operator | May 1990 |
| 28234 | Sunburst Exploration, Inc. | | Oil & Gas Operator | Jul 2000 |
| 28235 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | May 2025 |
| 28236 | Sunbury-Trenton Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1988 |
| 28237 | Sunchase Exploration, Inc. | | Oil & Gas Operator | Oct 1997 |
| 28238 | Suncoast Investments Co., Inc. | Plano, TX 75074 | Oil & Gas Operator | Oct 2001 |
| 28239 | Suncoast Technical Service Inc | Plano, TX 75074-5438 | Oil Operator | Mar 2005 |
| 28240 | Suncoast Technical Services Inc | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 28241 | Suncoast Technical SVCS., Inc. | | Oil & Gas Operator | Dec 2011 |
| 28242 | Suncor Energy Natural Gas America Inc | Greenwood VIllage, CO 80111 | Gas Operator | Feb 2010 |
| 28243 | Sundance Consulting Corp. | Abilene, TX 79605 | Oil & Gas Operator | Jul 2025 |
| 28244 | Sundance Energy Corporation | | Oil & Gas Operator | Jan 2025 |
| 28245 | Sundance Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2014 |
| 28246 | Sundance Energy Oklahoma LLC Dba Seo LLC | Denver, CO 80202-3620 | Oil & Gas Operator | Nov 2021 |
| 28247 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 28248 | Sundance Oil Exploration Co | | Oil Operator | Mar 1986 |
| 28249 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 28250 | Sundance Operating Co | | Oil & Gas Operator | Jul 2016 |
| 28251 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 28252 | Sunday Corporation | Olney, TX 76374 | Oil & Gas Operator | Jul 2025 |
| 28253 | Sunday-Smith Mary E | Mannford, OK 74044-1457 | Oil & Gas Operator | Mar 2015 |
| 28254 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 28255 | Sundial Energy LLC | Oklahoma City, OK 73013 | Oil & Gas Operator | May 2025 |
| 28256 | Sundial Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 28257 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Jul 2025 |
| 28258 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 28259 | Sundown Oil Operating, LLC | Graham, TX 76450 | Oil Operator | Jul 2025 |
| 28260 | Sundown Permian LP | Dallas, TX 75248 | Oil & Gas Operator | Oct 2018 |
| 28261 | Sunergon Oil Operating, LLC | Gainesville, TX 76240 | Oil Operator | Jul 2025 |
| 28262 | Sunex Resources Incorporated | | Oil Operator | Dec 1981 |
| 28263 | Sunfield Energy Company | Houston, TX 77084-5113 | Oil & Gas Operator | Jul 1999 |
| 28264 | Sunfire Energy | | Oil & Gas Operator | Mar 2025 |
| 28265 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 28266 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Mar 2025 |
| 28267 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Nov 2024 |
| 28268 | Sunland Enterprises Corp | Norman, OK 73071 | Oil Operator | Sep 2004 |
| 28269 | Sunland Production Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2025 |
| 28270 | Sunlight Exploration, Inc. | Canyon, TX 79015 | Oil & Gas Operator | Jul 2025 |
| 28271 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 28272 | Sunny Shores Of Ohio Inc | Fountain Hills, AZ 85268 | Oil & Gas Operator | Dec 2008 |
| 28273 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 28274 | Sunray DX Oil Co | | Gas Operator | Dec 1983 |
| 28275 | Sunray Energy, Inc. | Round Rock, TX 78683 | Oil & Gas Operator | Nov 2018 |
| 28276 | Sunray Oil Co., Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2013 |
| 28277 | Sunray Operating Company LLC | Sugar Land, TX 77498 | Oil & Gas Operator | Jul 2025 |
| 28278 | Sunray Petroleum Inc. | | Oil & Gas Operator | Apr 2025 |
| 28279 | Sunray-Taylor, Inc. | Midland, TX 79701 | Oil & Gas Operator | Nov 1993 |
| 28280 | Sunrise Enterprises | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 28281 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 28282 | Sunrise Oil, LTD. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2004 |
| 28283 | Sunset 2018, LLC | Farmington, NM 87401 | Oil & Gas Operator | May 2025 |
| 28284 | Sunset Energy L L C | Palm Harbor, FL 34683-3044 | Oil Operator | Dec 2007 |
| 28285 | Sunset Exploration Inc. | | Oil & Gas Operator | Apr 2025 |
| 28286 | Sunset Leases LLC | Ozona, TX 76943 | Oil Operator | Jul 2025 |
| 28287 | Sunset Well Service Holdings Inc | Midland, TX 79708 | Oil Operator | Apr 2013 |
| 28288 | Sunshine Oil & Gas, LLC | Madisonville, KY 42431 | Oil & Gas Operator | Dec 2023 |
| 28289 | Sunshine Valley Petroleum | Casper, WY 82605 | Oil & Gas Operator | May 2025 |
| 28290 | Sunstone Energy Company | Tulsa, OK 74153 | Oil & Gas Operator | Aug 2009 |
| 28291 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 28292 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 28293 | Sunwest Oklahoma, Inc | Dallas, TX 75231 | Oil & Gas Operator | May 2023 |
| 28294 | Sunwest Operating Company L.L.C. | Englewood, CO 80155 | Oil & Gas Operator | Aug 2002 |
| 28295 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 28296 | Supa Energy, Inc. | Shamrock, TX 79079 | Oil & Gas Operator | Jul 2025 |
| 28297 | Super Energy Inc. | | Oil & Gas Operator | Oct 1993 |
| 28298 | Super Heaters LLC | Houston, TX 77242-1328 | Oil Operator | Mar 2022 |
| 28299 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 28300 | Superior - Austral | | Oil & Gas Operator | Mar 1978 |