| 27501 | Sto Operating Company | San Antonio, TX 78258 | Oil & Gas Operator | Sep 2026 |
| 27502 | Stobaugh G B Trust | Oklahoma City, OK 73124 | Oil Operator | Mar 2026 |
| 27503 | Stober Oil And Gas Services, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 27504 | Stockdale Energy Co. | | Gas Operator | Dec 1992 |
| 27505 | Stockdale Oil & Gas Inc. | | Oil & Gas Operator | Dec 2001 |
| 27506 | Stocker & Sitler Inc | Columbus, OH 43214 | Oil & Gas Operator | Dec 2002 |
| 27507 | Stockyard Energy Partners, LLC | Calumet, OK 73014 | Oil Operator | Jan 2026 |
| 27508 | Stoeppelwerth DR | | Oil Operator | May 1993 |
| 27509 | Stokes Donna L | Blanchard, OK 73010 | Oil & Gas Operator | Jun 2023 |
| 27510 | Stoll, James G | Eden, NY 14057 | Gas Operator | Dec 2025 |
| 27511 | Stoltz, Deane H. | Midland, TX 79710 | Oil & Gas Operator | Oct 2000 |
| 27512 | Stone & Webster Oil Company, Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 1995 |
| 27513 | Stone & Williams Oil&Gas Co.,Inc | Holliday, TX 76366 | Oil Operator | Apr 2013 |
| 27514 | Stone & Wolf LLC | Sheridan, WY 82801 | Oil & Gas Operator | Dec 2006 |
| 27515 | Stone Cabin Resources LLC | | Oil & Gas Operator | Jul 2026 |
| 27516 | Stone Creek Brick Co | Stone Creek, OH 43840 | Oil & Gas Operator | Dec 2004 |
| 27517 | Stone Creek Operating, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 27518 | Stone Edge Energy, LLC | El Campo, TX 77437 | Oil & Gas Operator | Sep 2026 |
| 27519 | Stone Energy Corporation | Denver, CO 80202-2828 | Oil & Gas Operator | Oct 2014 |
| 27520 | Stone Energy LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 27521 | Stone Mountain Petroleum, LLC | Houston, TX 77008 | Oil & Gas Operator | Aug 2002 |
| 27522 | Stone Oak Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2026 |
| 27523 | Stone Oil Compan | | Oil Operator | Jan 1990 |
| 27524 | Stone Oil Corp & McMoran Expl | | Oil & Gas Operator | Oct 1984 |
| 27525 | Stone Oil Corp - Strata Energy | | Oil & Gas Operator | Mar 1982 |
| 27526 | Stone Oil Corp-Forest Oil Corp | | Oil & Gas Operator | Jan 1983 |
| 27527 | Stone Oil-Lamson-Onshore Pet. | | Oil & Gas Operator | May 1985 |
| 27528 | Stone Oil-Quasar-Birthright | | Oil & Gas Operator | Feb 1981 |
| 27529 | Stone Petroleum Corporation | | Oil & Gas Operator | Dec 1996 |
| 27530 | Stone Ridge Energy LLC | Uniontown, PA 15401-6831 | Oil & Gas Operator | May 2026 |
| 27531 | Stone River Energy Corp | Edmond, OK 73034 | Oil & Gas Operator | Jan 2014 |
| 27532 | Stone Thomas R | Coweta, OK 74429-3293 | Oil & Gas Operator | Mar 2020 |
| 27533 | Stone, B. W. | Holliday, TX 76366 | Oil & Gas Operator | Feb 2012 |
| 27534 | Stone, D J | Palo Alto, CA 94301 | Oil & Gas Operator | Sep 1985 |
| 27535 | Stone, Gregory W. | Holliday, TX 76366 | Oil & Gas Operator | Sep 2026 |
| 27536 | Stone, J. G. Oil Co. | Victoria, TX 77904 | Oil & Gas Operator | Sep 2018 |
| 27537 | Stone, M. L. | Kerrville, TX 78029 | Oil & Gas Operator | Aug 2003 |
| 27538 | Stonebriar Oil LLC | Dallas, TX 75252 | Oil & Gas Operator | Sep 2026 |
| 27539 | Stonebriar Operating, LLC | Plano, TX 75093 | Oil Operator | Sep 2026 |
| 27540 | Stonebridge Operating Co LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 27541 | Stoneburner Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1997 |
| 27542 | Stonegate Operators, Inc. | Addison, TX 75001 | Oil Operator | Sep 2026 |
| 27543 | Stonegate Production Company,LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2026 |
| 27544 | Stonegate Ranch LLC | Caney, KS 67333 | Oil & Gas Operator | May 2026 |
| 27545 | Stoneham Oil Company | Houston, TX 77002 | Oil & Gas Operator | Sep 1995 |
| 27546 | Stoneham Production LLC | | Oil & Gas Operator | May 2026 |
| 27547 | Stonehaven Energy MGT Co LLC | | Oil & Gas Operator | Dec 2019 |
| 27548 | Stoner Oil | Corsicana, TX 75109 | Oil Operator | Sep 2026 |
| 27549 | Stoner, C. M. | Cleburne, TX 76031 | Oil & Gas Operator | Oct 1996 |
| 27550 | Stoneridge Oil Inc | Ponca City, OK 74601-1600 | Oil & Gas Operator | Jan 2001 |
| 27551 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Sep 2026 |
| 27552 | Stonestreet, Vance | | Oil & Gas Operator | Dec 2006 |
| 27553 | Stonetown Properties, LTD. | Amarillo, TX 79114 | Oil & Gas Operator | Dec 2016 |
| 27554 | Stonewall Gas Co | Jane Lew, WV 26378 | Oil & Gas Operator | Dec 1999 |
| 27555 | Stonewall Production Company Inc | Tyler, TX 75702 | Oil & Gas Operator | Aug 2009 |
| 27556 | Stoney Brook Investments | Somerset, KY 42503 | Gas Operator | Dec 2024 |
| 27557 | Stoney Creek Production LLC | | Oil Operator | Jul 2026 |
| 27558 | Stoney Lake Production Co LLC | | Oil Operator | Jul 2026 |
| 27559 | Storch, Diane F. | Attica, NY 14011 | Gas Operator | Dec 2025 |
| 27560 | Storck Omer | Tulsa, OK 74105 | Oil Operator | Apr 1997 |
| 27561 | Storm Burchett Dba Storm Resources, LLC | Albany, KY 42602 | Oil Operator | Dec 2022 |
| 27562 | Storm Cat Energy USA Operating Corp | Denver, CO 80202 | Gas Operator | Jun 2017 |
| 27563 | Storm Exploration Inc | Skiatook, OK 74070-1014 | Oil & Gas Operator | Jan 2013 |
| 27564 | Storm Industries | | Oil & Gas Operator | Dec 1988 |
| 27565 | Storm Oil | Burkburnett, TX 76354 | Oil & Gas Operator | Sep 2026 |
| 27566 | Storm Peak Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2012 |
| 27567 | Story NRG LLC | Boerne, TX 78006 | Oil & Gas Operator | Sep 2026 |
| 27568 | Story Oil And Gas Inc | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 27569 | Stoskopf, Wayne | Hoisington, KS 67544 | Oil Operator | Apr 1995 |
| 27570 | Stotts-Kirkpatri | | Oil Operator | Oct 1991 |
| 27571 | Stouder DRLG Co | | Oil & Gas Operator | Dec 2024 |
| 27572 | Stoudt, Jean Marie | Broken Arrow, OK 74011 | Oil Operator | Apr 2026 |
| 27573 | Stout Consulting Services, Inc. | Alice, TX 78333 | Oil & Gas Operator | May 1999 |
| 27574 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2026 |
| 27575 | Stovall Oil Company | Casper, WY 82602 | Oil & Gas Operator | Aug 1998 |
| 27576 | Stovall Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 27577 | Stovall, Howard | Cisco, TX 76437 | Oil & Gas Operator | Sep 2026 |
| 27578 | Stovall, Troy | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 27579 | Stover Company | Tulsa, OK 74152-0786 | Oil & Gas Operator | Jan 2013 |
| 27580 | Stover Oil Company | Konawa, OK 74849-0216 | Oil & Gas Operator | Jul 2002 |
| 27581 | Stover Petroleum Inc | | Oil & Gas Operator | Mar 1990 |
| 27582 | Stowe Energy, Inc. | Vernon, TX 76384 | Oil & Gas Operator | Mar 2003 |
| 27583 | Stowe Killingsworth | | Oil & Gas Operator | Apr 2023 |
| 27584 | Stowers Energy, LLC | Celebration, FL 34747 | Oil & Gas Operator | Dec 2021 |
| 27585 | STP Cherokee Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 27586 | STP Newco Inc | Oklahoma City, OK 73102-5641 | Oil & Gas Operator | Jul 2021 |
| 27587 | Strabala Joseph | | Oil Operator | Jan 1992 |
| 27588 | Strachan Exploration Inc | Englewood, CO 80112 | Oil & Gas Operator | May 2026 |
| 27589 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 27590 | Strahan Oil & Gas Co., Inc. | | Gas Operator | Oct 1983 |
| 27591 | Strait F W Incor | | Oil Operator | Jan 1992 |
| 27592 | Strand Energy, Inc. (I) | Houston, TX 77002 | Oil & Gas Operator | Sep 1996 |
| 27593 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 27594 | Strand, Carlton Oil | Stamford, TX 79553 | Oil & Gas Operator | May 1997 |
| 27595 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 27596 | Strange, Joyce Marital Trust | Holliday, TX 76366 | Oil Operator | May 2008 |
| 27597 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2026 |
| 27598 | Strata Energy Re | | Oil Operator | Nov 1987 |
| 27599 | Strata Energy, Inc. | | Oil & Gas Operator | Sep 1983 |
| 27600 | Strata Exploration, Inc. | Fairfield, IL 62837 | Oil & Gas Operator | May 2026 |