| 27701 | Subsea Operating Co. | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 27702 | Subsurface Energy Corp. | Coleman, TX 76834 | Oil & Gas Operator | Sep 2026 |
| 27703 | Subsurface Energy, Inc. | | Oil & Gas Operator | Oct 2015 |
| 27704 | Subsurface Exploration | Coleman, TX 76834 | Oil & Gas Operator | Apr 2006 |
| 27705 | Subsurface Minerals Group LLC | Tulsa, OK 74119-1635 | Oil & Gas Operator | Jan 2013 |
| 27706 | Subsurface Production, Inc. | Beeville, TX 78102 | Oil & Gas Operator | Sep 2026 |
| 27707 | Subsurface Resources Inc | Logan, UT 84321 | Oil & Gas Operator | Aug 1990 |
| 27708 | Suburban Propane Expl Co, Inc. | | Oil & Gas Operator | Jun 1983 |
| 27709 | Suburban Propane Gas Corp. | | Oil & Gas Operator | Sep 1980 |
| 27710 | Success Oil Company, Inc. | Beverly Hills, CA 90211 | Oil & Gas Operator | Sep 2026 |
| 27711 | Sudberry Mark E Dba Gushing Oil Co | Trophy Club, TX 76262-5531 | Oil Operator | Jan 2020 |
| 27712 | Sue-Ann Operating, L.C. | Victoria, TX 77903 | Oil & Gas Operator | Sep 2026 |
| 27713 | Sue-Ann Production Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 27714 | Suemaur Expl. & Prod., LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 27715 | Suemaur Exploration, Inc. | Corpus Chrsti, TX 78470 | Oil & Gas Operator | Mar 2008 |
| 27716 | Suemaur Operating LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 27717 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Mar 2025 |
| 27718 | Suerte Oil Compa | | Oil & Gas Operator | Oct 1995 |
| 27719 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 27720 | Sugar Bowl Gas Corp. | | Oil Operator | Dec 1983 |
| 27721 | Sugar Bowl Industrial Gas Corp | | Oil Operator | Dec 1983 |
| 27722 | Sugar Creek Environmental, LLC | | Oil Operator | Jan 2025 |
| 27723 | Sugar Creek Producing Company | | Oil & Gas Operator | Dec 2010 |
| 27724 | Sugar Creek Producing Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 27725 | Sugar Enterprises, LLC | Tyler, TX 75713 | Oil & Gas Operator | Sep 2026 |
| 27726 | Sugar Oil Company | | Oil & Gas Operator | Feb 2011 |
| 27727 | Sugar Rock Incorporated | Ellenboro, WV 263460000 | Oil & Gas Operator | Dec 2021 |
| 27728 | Suits & Jeans, LLC | Pampa, TX 79066 | Oil & Gas Operator | Sep 2026 |
| 27729 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 27730 | Sukay Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2003 |
| 27731 | Sullivan & Clark | Youngsville, PA 16371-0194 | Oil & Gas Operator | Dec 1998 |
| 27732 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 27733 | Sullivan - Wells | Amarillo, TX 79101 | Gas Operator | Sep 2026 |
| 27734 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jul 2026 |
| 27735 | Sullivan Jesse G | Duncan, OK 73533 | Oil Operator | May 1998 |
| 27736 | Sullivan Nora M | Oklahoma City, OK 73139 | Oil Operator | Jan 1997 |
| 27737 | Sullivan Well Service | | Oil Operator | Mar 2010 |
| 27738 | Sullivan Wesley L | Duncan, OK 73533 | Oil & Gas Operator | Mar 2002 |
| 27739 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 27740 | Sullivant G W | Oklahoma City, OK 73172-1135 | Oil & Gas Operator | Aug 2001 |
| 27741 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Sep 2026 |
| 27742 | Sultex Oil & Gas Inc | Houston, TX 77059-3126 | Oil & Gas Operator | Aug 2002 |
| 27743 | Summa Engineering Inc | Oklahoma City, OK 73112-3624 | Oil & Gas Operator | Mar 2015 |
| 27744 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 27745 | Summers Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2002 |
| 27746 | Summers, Esther B. | Midland, MI 48640 | Gas Operator | Dec 2025 |
| 27747 | Summit Appalachia Operating Company, LLC | | Gas Operator | Dec 2021 |
| 27748 | Summit Discovery Res II LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2019 |
| 27749 | Summit Energy Company | | Oil & Gas Operator | Mar 2009 |
| 27750 | Summit Energy LLC | | Oil & Gas Operator | Jun 2026 |
| 27751 | Summit Energy,Inc | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 27752 | Summit Essexville Inc | | Oil Operator | Dec 2014 |
| 27753 | Summit Exploration (California) LLC | | Oil & Gas Operator | Feb 2018 |
| 27754 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 27755 | Summit Gas LLC | | Oil & Gas Operator | Oct 2011 |
| 27756 | Summit Gas Resources Inc | Sheridan, WY 82801 | Gas Operator | Dec 2023 |
| 27757 | Summit Oil & Gas, LLC | | Oil & Gas Operator | Nov 2024 |
| 27758 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Jul 2026 |
| 27759 | Summit Overseas Expl., Inc. | Lakewood, CO 80226 | Oil & Gas Operator | Apr 2007 |
| 27760 | Summit Petroleum Corp And Muskegon Development C | | Oil Operator | Dec 2006 |
| 27761 | Summit Petroleum Corp Of MT Pleasant | | Oil & Gas Operator | Dec 2007 |
| 27762 | Summit Petroleum Inc | Twinsburg, OH 44087 | Oil & Gas Operator | Dec 2025 |
| 27763 | Summit Petroleum LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 27764 | Summit Reed City Inc | | Oil Operator | Dec 2014 |
| 27765 | Summit Resources Management LLC | Edmond, OK 73083 | Oil & Gas Operator | Jun 2026 |
| 27766 | Summit Resources MGMT., LLC. | Edmond, OK 73083 | Oil & Gas Operator | Sep 2026 |
| 27767 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 27768 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Mar 2026 |
| 27769 | Summitt Resources | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2008 |
| 27770 | Sumner Energy Inc | | Oil & Gas Operator | Jun 2026 |
| 27771 | Sumpf-Williams | | Gas Operator | Dec 1980 |
| 27772 | Sumrall Sharon | Poolville, TX 76487-2065 | Oil & Gas Operator | Apr 2022 |
| 27773 | Sun Coulee, LLC | Martinsdale, MT 59053 | Oil & Gas Operator | Jun 2026 |
| 27774 | Sun Explor & Production Co | Oklahoma City, OK 73126 | Gas Operator | Oct 1984 |
| 27775 | Sun Exploration & Production Co | | Oil & Gas Operator | Jan 1990 |
| 27776 | Sun Exploration Co, Inc | | Oil Operator | Dec 2010 |
| 27777 | Sun Exploration, Inc. | Alice, TX 78333 | Oil & Gas Operator | Sep 2026 |
| 27778 | Sun Mountain Oil & Gas | | Oil & Gas Operator | Dec 2020 |
| 27779 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |
| 27780 | Sun Resources Texas, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2024 |
| 27781 | Sun River Operating, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2026 |
| 27782 | Sun Texas Company | | Oil & Gas Operator | Jun 1981 |
| 27783 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 27784 | Sun-Key Oil Co., Inc. | Dublin, TX 76446 | Oil & Gas Operator | Sep 2026 |
| 27785 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 27786 | Sunbelt Oil Investments Inc | Lindsay, OK 73052 | Oil & Gas Operator | May 1993 |
| 27787 | Sunbelt Salvage | Eastland, TX 76448 | Oil & Gas Operator | Sep 1998 |
| 27788 | Sunburst Explora | | Oil Operator | May 1990 |
| 27789 | Sunburst Exploration, Inc. | | Oil & Gas Operator | Jul 2000 |
| 27790 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Jun 2026 |
| 27791 | Sunbury-Trenton Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1988 |
| 27792 | Sunchase Exploration, Inc. | | Oil & Gas Operator | Oct 1997 |
| 27793 | Suncoast Investments Co., Inc. | Plano, TX 75074 | Oil & Gas Operator | Oct 2001 |
| 27794 | Suncoast Technical Service Inc | Plano, TX 75074-5438 | Oil Operator | Mar 2005 |
| 27795 | Suncoast Technical Services Inc | Dallas, TX 75251 | Oil & Gas Operator | Sep 2026 |
| 27796 | Suncoast Technical SVCS., Inc. | | Oil & Gas Operator | Dec 2011 |
| 27797 | Suncor Energy Natural Gas America Inc | Greenwood VIllage, CO 80111 | Gas Operator | Feb 2010 |
| 27798 | Sundance Consulting Corp. | Abilene, TX 79605 | Oil & Gas Operator | Sep 2026 |
| 27799 | Sundance Energy Corporation | | Oil & Gas Operator | Jan 2025 |
| 27800 | Sundance Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2014 |