| 27501 | Stucky, Edward P. | Sabetha, KS 66534 | Oil Operator | May 1992 |
| 27502 | Stucky, Kenneth R. Oil & Gas Operations | Burrton, KS 67020 | Oil & Gas Operator | Aug 2002 |
| 27503 | Studer Oil Co. | Pratt, KS 67124 | Oil Operator | Oct 2019 |
| 27504 | Studer Oil Compa | | Oil & Gas Operator | Feb 1993 |
| 27505 | Studley Resources Corporation | Humble, TX 77347 | Oil & Gas Operator | Dec 1996 |
| 27506 | Studley, Richard | Gowanda, NY 14070 | Gas Operator | Dec 2024 |
| 27507 | Studley, Robert SR. & Robert Jr. | Gowanda, NY 14070 | Gas Operator | Dec 2024 |
| 27508 | Stull Crude Co, LLC | | Oil Operator | Jan 2026 |
| 27509 | Stull Oil LLC | Natoma, KS 67651 | Oil Operator | Jan 2026 |
| 27510 | Stults, Joe K. | Archer City, TX 76351 | Oil & Gas Operator | Mar 2007 |
| 27511 | Stumpff Paul | Bartlesville, OK 74006-3426 | Oil & Gas Operator | Mar 2015 |
| 27512 | Sturgeon Point Development Co | | Gas Operator | Jun 2019 |
| 27513 | Sturman Jay R | Mounds, OK 74047 | Oil & Gas Operator | Aug 2025 |
| 27514 | Stuteville Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2004 |
| 27515 | Stuteville, Jack | Olney, TX 76374 | Oil Operator | May 2026 |
| 27516 | Stydahar Oil & Gas Co. | | Oil & Gas Operator | Dec 2021 |
| 27517 | STZ Petroleum Inc. | Houston, TX 77268 | Oil & Gas Operator | Dec 1997 |
| 27518 | Sub Surface Operations | Brownwood, TX 76804 | Oil & Gas Operator | May 2026 |
| 27519 | Sublette Feeders LLC | Sublette, KS 67877 | Gas Operator | Jan 2026 |
| 27520 | Suborp Energy, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Sep 2000 |
| 27521 | Subsea Operating Co. | Albany, TX 76430 | Oil & Gas Operator | May 2026 |
| 27522 | Subsurface Energy Corp. | Coleman, TX 76834 | Oil & Gas Operator | May 2026 |
| 27523 | Subsurface Energy, Inc. | | Oil & Gas Operator | Oct 2015 |
| 27524 | Subsurface Exploration | Coleman, TX 76834 | Oil & Gas Operator | Apr 2006 |
| 27525 | Subsurface Minerals Group LLC | Tulsa, OK 74119-1635 | Oil & Gas Operator | Jan 2013 |
| 27526 | Subsurface Production, Inc. | Coleman, TX 76834 | Oil & Gas Operator | May 2026 |
| 27527 | Subsurface Resources Inc | Logan, UT 84321 | Oil & Gas Operator | Aug 1990 |
| 27528 | Subterranean Energy, LLC | Tyler, TX 75705 | Oil & Gas Operator | May 2026 |
| 27529 | Suburban Propane Expl Co, Inc. | | Oil & Gas Operator | Jun 1983 |
| 27530 | Suburban Propane Gas Corp. | | Oil & Gas Operator | Sep 1980 |
| 27531 | Success Oil Company, Inc. | Beverly Hills, CA 90211 | Oil & Gas Operator | May 2026 |
| 27532 | Sudberry Mark E Dba Gushing Oil Co | Trophy Club, TX 76262-5531 | Oil Operator | Jan 2020 |
| 27533 | Sue-Ann Operating, L.C. | Victoria, TX 77903 | Oil & Gas Operator | May 2026 |
| 27534 | Sue-Ann Production Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 27535 | Suemaur Expl. & Prod., LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 27536 | Suemaur Exploration, Inc. | Corpus Chrsti, TX 78470 | Oil & Gas Operator | Mar 2008 |
| 27537 | Suemaur Operating LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | May 2026 |
| 27538 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Mar 2025 |
| 27539 | Suerte Oil Compa | | Oil & Gas Operator | Oct 1995 |
| 27540 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 27541 | Sugar Bowl Gas Corp. | | Oil Operator | Dec 1983 |
| 27542 | Sugar Bowl Industrial Gas Corp | | Oil Operator | Dec 1983 |
| 27543 | Sugar Creek Environmental, LLC | | Oil Operator | Jan 2025 |
| 27544 | Sugar Creek Producing Company | | Oil & Gas Operator | Dec 2010 |
| 27545 | Sugar Creek Producing Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 27546 | Sugar Enterprises, LLC | Tyler, TX 75713 | Oil & Gas Operator | May 2026 |
| 27547 | Sugar Oil Company | | Oil & Gas Operator | Feb 2011 |
| 27548 | Sugar Rock Incorporated | | Oil & Gas Operator | Dec 2021 |
| 27549 | Suits & Jeans, LLC | Pampa, TX 79066 | Oil & Gas Operator | May 2026 |
| 27550 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 27551 | Sukay Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2003 |
| 27552 | Sullivan & Clark | Youngsville, PA 16371-0194 | Oil & Gas Operator | Dec 1998 |
| 27553 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 27554 | Sullivan - Wells | Amarillo, TX 79101 | Gas Operator | May 2026 |
| 27555 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 27556 | Sullivan Jesse G | Duncan, OK 73533 | Oil Operator | May 1998 |
| 27557 | Sullivan Nora M | Oklahoma City, OK 73139 | Oil Operator | Jan 1997 |
| 27558 | Sullivan Well Service | | Oil Operator | Mar 2010 |
| 27559 | Sullivan Wesley L | Duncan, OK 73533 | Oil & Gas Operator | Mar 2002 |
| 27560 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 27561 | Sullivant G W | Oklahoma City, OK 73172-1135 | Oil & Gas Operator | Aug 2001 |
| 27562 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 2026 |
| 27563 | Sultex Oil & Gas Inc | Houston, TX 77059-3126 | Oil & Gas Operator | Aug 2002 |
| 27564 | Summa Engineering Inc | Oklahoma City, OK 73112-3624 | Oil & Gas Operator | Mar 2015 |
| 27565 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 27566 | Summers Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2002 |
| 27567 | Summers, Esther B. | Midland, MI 48640 | Gas Operator | Dec 2024 |
| 27568 | Summit Appalachia Operating Company, LLC | | Gas Operator | Dec 2021 |
| 27569 | Summit Discovery Res II LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2019 |
| 27570 | Summit Energy Company | | Oil & Gas Operator | Mar 2009 |
| 27571 | Summit Energy LLC | | Oil & Gas Operator | Feb 2026 |
| 27572 | Summit Energy,Inc | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 27573 | Summit Essexville Inc | | Oil Operator | Dec 2014 |
| 27574 | Summit Exploration (California) LLC | | Oil & Gas Operator | Feb 2018 |
| 27575 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 27576 | Summit Gas LLC | | Oil & Gas Operator | Oct 2011 |
| 27577 | Summit Gas Resources Inc | Sheridan, WY 82801 | Gas Operator | Dec 2023 |
| 27578 | Summit Oil & Gas, LLC | | Oil & Gas Operator | Nov 2024 |
| 27579 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Feb 2026 |
| 27580 | Summit Overseas Expl., Inc. | Lakewood, CO 80226 | Oil & Gas Operator | Apr 2007 |
| 27581 | Summit Petroleum Corp And Muskegon Development C | | Oil Operator | Dec 2006 |
| 27582 | Summit Petroleum Corp Of MT Pleasant | | Oil & Gas Operator | Dec 2007 |
| 27583 | Summit Petroleum Inc | Twinsburg, OH 44087 | Oil & Gas Operator | Dec 2025 |
| 27584 | Summit Petroleum LLC | Midland, TX 79705 | Oil & Gas Operator | May 2026 |
| 27585 | Summit Reed City Inc | | Oil Operator | Dec 2014 |
| 27586 | Summit Resources Management LLC | Edmond, OK 73083 | Oil & Gas Operator | Feb 2026 |
| 27587 | Summit Resources MGMT., LLC. | Edmond, OK 73083 | Oil & Gas Operator | May 2026 |
| 27588 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 27589 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Nov 2025 |
| 27590 | Summitt Resources | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2008 |
| 27591 | Sumner Energy Inc | | Oil & Gas Operator | Feb 2026 |
| 27592 | Sumpf-Williams | | Gas Operator | Dec 1980 |
| 27593 | Sumrall Sharon | Poolville, TX 76487-2065 | Oil & Gas Operator | Apr 2022 |
| 27594 | Sun Coulee, LLC | Martinsdale, MT 59053 | Oil & Gas Operator | Feb 2026 |
| 27595 | Sun Explor & Production Co | Oklahoma City, OK 73126 | Gas Operator | Oct 1984 |
| 27596 | Sun Exploration And Production Co | | Oil & Gas Operator | Jan 1990 |
| 27597 | Sun Exploration Co, Inc | | Oil Operator | Dec 2010 |
| 27598 | Sun Exploration, Inc. | Alice, TX 78333 | Oil & Gas Operator | May 2026 |
| 27599 | Sun Mountain Oil & Gas | | Oil & Gas Operator | Dec 2020 |
| 27600 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |