| 28501 | Swanson & Vestal | Electra, TX 76360 | Oil & Gas Operator | Oct 1997 |
| 28502 | Swanson Douglas L & Sharon | Bartlesville, OK 74003-9319 | Oil Operator | Mar 2025 |
| 28503 | Swanson G T | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 28504 | Swanson Oil & Gas LLC | Williston, ND 58802 | Oil Operator | Mar 2025 |
| 28505 | Swanson Operating, Inc. | Holliday, TX 76366 | Oil Operator | Jun 2025 |
| 28506 | Swanson, Tom | Electra, TX 76360 | Oil & Gas Operator | Oct 2004 |
| 28507 | Swanson, Tommy Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 28508 | Swaringin, Howard Operating | Maryneal, TX 79535 | Oil & Gas Operator | May 2003 |
| 28509 | Swartout, John D & Sandra | Sherman, NY 14781 | Gas Operator | Dec 2023 |
| 28510 | Swartz Oil Company | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2025 |
| 28511 | Swartz, Guy A. | San Angelo, TX 76904 | Oil & Gas Operator | Aug 1993 |
| 28512 | SWD Acidizing, Inc. | | Oil Operator | Feb 2014 |
| 28513 | SWD, Inc. | | Oil Operator | Jan 2025 |
| 28514 | Swearingen Robert E Dba Sabo Production | Seminole, OK 74868 | Oil & Gas Operator | Mar 2025 |
| 28515 | Sweet Crude Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Jun 2025 |
| 28516 | Sweet Texas T Energy LLC | Clyde, TX 79510 | Oil Operator | Jun 2025 |
| 28517 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Jun 2025 |
| 28518 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Mar 2025 |
| 28519 | Sweetwater Production, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2025 |
| 28520 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 28521 | Swenco-Western Inc | Houston, TX 77060 | Oil & Gas Operator | Jan 1997 |
| 28522 | Swenson Backhoe Service, Inc. | Electra, TX 76360 | Oil Operator | Jun 2025 |
| 28523 | Swenson, Clifford E. | Henrietta, TX 76365 | Oil & Gas Operator | Jun 2025 |
| 28524 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | Mar 2025 |
| 28525 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 28526 | Swepi LP And Miller Brothers | | Oil & Gas Operator | Oct 1992 |
| 28527 | Swepi/Western Division | Houston, TX 77210 | Oil & Gas Operator | Aug 1984 |
| 28528 | Swevco-Sabw LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 28529 | Swiess & Thomas | San Antonio, TX 78247 | Oil Operator | Jun 2025 |
| 28530 | Swift A W & Company Inc | Sand Springs, OK 74063-5124 | Oil Operator | Jun 2003 |
| 28531 | Swift Beef Company | | Oil & Gas Operator | May 2006 |
| 28532 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 28533 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 28534 | Swift Energy Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2017 |
| 28535 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |
| 28536 | Swingle Drilling Inc | Crooksville, OH 43731 | Oil & Gas Operator | Dec 2024 |
| 28537 | Swinkwood Oil Co | | Oil Operator | Apr 2015 |
| 28538 | SWJN Oil Company | Kilgore, TX 75663 | Oil Operator | Jun 2025 |
| 28539 | SWN Production (Louisiana), LLC | | Oil & Gas Operator | Dec 2024 |
| 28540 | SWN Production (Ohio), LLC | Morgantown, WV 26508 | Oil & Gas Operator | Mar 2024 |
| 28541 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Apr 2025 |
| 28542 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 28543 | Swo & Ism, LLC | | Oil & Gas Operator | Dec 2021 |
| 28544 | Swope Corp. | Austin, TX 78735 | Oil & Gas Operator | Jun 2025 |
| 28545 | SWS | Humble, TX 77338 | Oil Operator | Jun 2025 |
| 28546 | SWS Operating LLC | Lawton, OK 73501-3236 | Oil Operator | Sep 2024 |
| 28547 | SWV Energy Operating LLC | Spring, TX 77379 | Gas Operator | Dec 2018 |
| 28548 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 28549 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Jun 2025 |
| 28550 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 28551 | Sydson Energy, Inc. | Houston, TX 77027 | Oil & Gas Operator | Jun 2025 |
| 28552 | Syj Oil & Gas | San Antonio, TX 78209 | Oil Operator | Sep 2000 |
| 28553 | Syj Oil & Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2025 |
| 28554 | Sylvan Energy, LLC | Pittsburgh, PA 15211 | Oil & Gas Operator | Jun 2025 |
| 28555 | Sylvan Oil Operating Company | Tulsa, OK 74103-3516 | Oil & Gas Operator | Apr 2016 |
| 28556 | Sylvite Corp | Tulsa, OK 741363908 | Oil & Gas Operator | Dec 2000 |
| 28557 | Symank, Steve | Olney, TX 76374 | Oil & Gas Operator | Jun 2025 |
| 28558 | Symba American Oil, Inc | Houston, TX 77056 | Oil Operator | Jun 2025 |
| 28559 | Synd Enterprises Inc | Lakewood, NY 14750-9613 | Oil & Gas Operator | Dec 2006 |
| 28560 | Syndex Resources, Inc. | Wellesley, MA 02181-000 | Oil & Gas Operator | Dec 2021 |
| 28561 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 28562 | Synergy Development Corp | | Oil Operator | Apr 2011 |
| 28563 | Synergy Offshore LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2022 |
| 28564 | Synergy Oil & Gas LLC | | Oil & Gas Operator | Mar 2025 |
| 28565 | Synergy Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Nov 2019 |
| 28566 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 28567 | Synergy Oil & Gas, L.P. | Houston, TX 77024 | Oil & Gas Operator | May 2012 |
| 28568 | Synergy Operating Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 28569 | Synergy Operating LLC | Farmington, NM 87499 | Oil & Gas Operator | Jul 2024 |
| 28570 | Synergy Production Company | Houston, TX 77024 | Oil & Gas Operator | Jan 1996 |
| 28571 | Synergy Resources | Artesia, NM 88210 | Oil & Gas Operator | Jan 2015 |
| 28572 | Synergy Resources Corporation | | Oil & Gas Operator | Oct 2022 |
| 28573 | Syntax Energy Corporation | Denton, TX 76210 | Oil Operator | Jun 2025 |
| 28574 | Synthetic Energy Corporation | Houston, TX 77006 | Oil Operator | Jun 2025 |
| 28575 | Szumigala, Edward R. & Ruth A. | Dunkirk, NY 14048 | Gas Operator | Dec 2023 |
| 28576 | T & A Resources LLC | Salyersville, KY 41465 | Oil Operator | Dec 2023 |
| 28577 | T & B Oil Company Inc | Ardmore, OK 73401-3709 | Oil & Gas Operator | Apr 2015 |
| 28578 | T & B Resources | | Oil & Gas Operator | Jul 1990 |
| 28579 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 28580 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 28581 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2025 |
| 28582 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 28583 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 28584 | T & D Oil LLC (Osage Only) | | Oil & Gas Operator | Mar 2025 |
| 28585 | T & F Exploration, LP | Pittsburgh, PA 15241-1375 | Oil & Gas Operator | Oct 2024 |
| 28586 | T & F Oil Company | | Oil Operator | Jan 2025 |
| 28587 | T & F Oil Company, LLC | | Oil Operator | Oct 2011 |
| 28588 | T & G Energy LLC | Dallas, TX 75230 | Oil Operator | Nov 2010 |
| 28589 | T & G Holding LLC | Pauls Valley, OK 73075-8663 | Oil & Gas Operator | Mar 2015 |
| 28590 | T & G Oil, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2010 |
| 28591 | T & I Petroleum Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2005 |
| 28592 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | Mar 2025 |
| 28593 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 28594 | T & K Oil, Inc | Stephens, AR 71764 | Oil Operator | Aug 2024 |
| 28595 | T & L Oil Production | | Oil Operator | Jan 2025 |
| 28596 | T & L Production | | Oil Operator | May 1987 |
| 28597 | T & L Production Company | | Oil Operator | Feb 1984 |
| 28598 | T & M Gauging | | Oil Operator | Oct 2006 |
| 28599 | T & M Oil & Royalty | Ada, OK 74820 | Oil Operator | Feb 2012 |
| 28600 | T & M Oil Company | Midlothian, TX 76065 | Oil & Gas Operator | Jun 2025 |