| 28401 | Swevco-Sabw LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 28402 | Swiess & Thomas | San Antonio, TX 78247 | Oil Operator | Jul 2025 |
| 28403 | Swift A W & Company Inc | Sand Springs, OK 74063-5124 | Oil Operator | Jun 2003 |
| 28404 | Swift Beef Company | | Oil & Gas Operator | May 2006 |
| 28405 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 28406 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 28407 | Swift Energy Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2017 |
| 28408 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |
| 28409 | Swingle Drilling Inc | Crooksville, OH 43731 | Oil & Gas Operator | Dec 2024 |
| 28410 | Swinkwood Oil Co | | Oil Operator | Apr 2015 |
| 28411 | SWJN Oil Company | Kilgore, TX 75663 | Oil Operator | Jul 2025 |
| 28412 | SWN Production (Louisiana), LLC | | Oil & Gas Operator | Dec 2024 |
| 28413 | SWN Production (Ohio), LLC | Morgantown, WV 26508 | Oil & Gas Operator | Mar 2024 |
| 28414 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | May 2025 |
| 28415 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 28416 | Swo & Ism, LLC | | Oil & Gas Operator | Dec 2021 |
| 28417 | Swope Corp. | Austin, TX 78735 | Oil & Gas Operator | Jul 2025 |
| 28418 | SWS | Humble, TX 77338 | Oil Operator | Jul 2025 |
| 28419 | SWS Operating LLC | Lawton, OK 73501-3236 | Oil Operator | Sep 2024 |
| 28420 | SWV Energy Operating LLC | Spring, TX 77379 | Gas Operator | Dec 2018 |
| 28421 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 28422 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Jul 2025 |
| 28423 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 28424 | Sydson Energy, Inc. | Houston, TX 77027 | Oil & Gas Operator | Jul 2025 |
| 28425 | Syj Oil & Gas | San Antonio, TX 78209 | Oil Operator | Sep 2000 |
| 28426 | Syj Oil & Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2025 |
| 28427 | Sylvan Energy, LLC | Pittsburgh, PA 15211 | Oil & Gas Operator | Jul 2025 |
| 28428 | Sylvan Oil Operating Company | Tulsa, OK 74103-3516 | Oil & Gas Operator | Apr 2016 |
| 28429 | Sylvite Corp | Tulsa, OK 741363908 | Oil & Gas Operator | Dec 2000 |
| 28430 | Symank, Steve | Olney, TX 76374 | Oil & Gas Operator | Jul 2025 |
| 28431 | Symba American Oil, Inc | Houston, TX 77056 | Oil Operator | Jul 2025 |
| 28432 | Synd Enterprises Inc | Lakewood, NY 14750-9613 | Oil & Gas Operator | Dec 2006 |
| 28433 | Syndex Resources, Inc. | Wellesley, MA 02181-000 | Oil & Gas Operator | Dec 2021 |
| 28434 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2025 |
| 28435 | Synergy Development Corp | | Oil Operator | Apr 2011 |
| 28436 | Synergy Offshore LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2022 |
| 28437 | Synergy Oil & Gas LLC | | Oil & Gas Operator | Apr 2025 |
| 28438 | Synergy Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Nov 2019 |
| 28439 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 28440 | Synergy Oil & Gas, L.P. | Houston, TX 77024 | Oil & Gas Operator | May 2012 |
| 28441 | Synergy Operating Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 28442 | Synergy Operating LLC | Farmington, NM 87499 | Oil & Gas Operator | Jul 2024 |
| 28443 | Synergy Production Company | Houston, TX 77024 | Oil & Gas Operator | Jan 1996 |
| 28444 | Synergy Resources | Artesia, NM 88210 | Oil & Gas Operator | Jan 2015 |
| 28445 | Synergy Resources Corporation | | Oil & Gas Operator | Oct 2022 |
| 28446 | Syntax Energy Corporation | Denton, TX 76210 | Oil Operator | Jul 2025 |
| 28447 | Synthetic Energy Corporation | Houston, TX 77006 | Oil Operator | Jul 2025 |
| 28448 | Szumigala, Edward R. & Ruth A. | Dunkirk, NY 14048 | Gas Operator | Dec 2024 |
| 28449 | T & A Resources LLC | Salyersville, KY 41465 | Oil Operator | Dec 2023 |
| 28450 | T & B Drilling, Inc | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 28451 | T & B Oil Company Inc | Ardmore, OK 73401-3709 | Oil & Gas Operator | Apr 2015 |
| 28452 | T & B Resources | | Oil & Gas Operator | Jul 1990 |
| 28453 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 28454 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 28455 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 28456 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 28457 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 28458 | T & D Oil LLC (Osage Only) | | Oil & Gas Operator | Apr 2025 |
| 28459 | T & F Exploration, LP | Pittsburgh, PA 15241-1375 | Oil & Gas Operator | Oct 2024 |
| 28460 | T & F Oil Company | | Oil Operator | Jan 2025 |
| 28461 | T & F Oil Company, LLC | | Oil Operator | Oct 2011 |
| 28462 | T & G Energy LLC | Dallas, TX 75230 | Oil Operator | Nov 2010 |
| 28463 | T & G Holding LLC | Pauls Valley, OK 73075-8663 | Oil & Gas Operator | Mar 2015 |
| 28464 | T & G Oil, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2010 |
| 28465 | T & I Petroleum Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2005 |
| 28466 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | May 2025 |
| 28467 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 28468 | T & K Oil, Inc | Stephens, AR 71764 | Oil Operator | Dec 2024 |
| 28469 | T & L Oil Production | | Oil Operator | Jan 2025 |
| 28470 | T & L Production | | Oil Operator | May 1987 |
| 28471 | T & L Production Company | | Oil Operator | Feb 1984 |
| 28472 | T & M Gauging | | Oil Operator | Oct 2006 |
| 28473 | T & M Oil & Royalty | Ada, OK 74820 | Oil Operator | Feb 2012 |
| 28474 | T & M Oil Company | Midlothian, TX 76065 | Oil & Gas Operator | Jul 2025 |
| 28475 | T & O Gas Co | | Oil Operator | May 2001 |
| 28476 | T & P Exploration | Addison, TX 75006 | Oil & Gas Operator | Aug 1993 |
| 28477 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 28478 | T & R Investments, Inc. | Borger, TX 79008 | Oil & Gas Operator | Nov 1995 |
| 28479 | T & R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 28480 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 28481 | T & S Oil & Gas, LLC | Graham, TX 76450 | Gas Operator | Jul 2025 |
| 28482 | T & T Compression Inc | Clymer, PA 15728-1014 | Gas Operator | Dec 2024 |
| 28483 | T & T Contracting Dba Hulman Contracting, LLC | Rockfield, KY 42274 | Oil & Gas Operator | Dec 2023 |
| 28484 | T & T Oil Co. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2002 |
| 28485 | T & T Production Co. | Victoria, TX 77902 | Oil & Gas Operator | Feb 1995 |
| 28486 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Apr 2025 |
| 28487 | T - C Oil Company | Refugio, TX 78377 | Oil & Gas Operator | Jan 2012 |
| 28488 | T And DS Lube Doctors LLC | Carlsbad, NM 88220 | Gas Operator | May 2025 |
| 28489 | T And L Oil Inc | Tonkawa, OK 74653-4530 | Oil & Gas Operator | Apr 2025 |
| 28490 | T B C Inc | Coweta, OK 74429 | Oil & Gas Operator | Apr 2020 |
| 28491 | T B Drilling Co | Moxahala, OH 43761 | Oil & Gas Operator | Dec 1998 |
| 28492 | T B K Energy Company | Brenham, TX 77833 | Oil & Gas Operator | Apr 2025 |
| 28493 | T Bar M Energy Resources LLC | Mounds, OK 74047 | Oil & Gas Operator | Apr 2025 |
| 28494 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 28495 | T C Production | | Oil Operator | May 1994 |
| 28496 | T D Cox Oil Corporation | | Oil & Gas Operator | Apr 2025 |
| 28497 | T D Energy Company Inc | Broken Arrow, OK 74011-3953 | Oil & Gas Operator | Feb 2015 |
| 28498 | T Dozer D Oil Co. | Goree, TX 76363 | Oil & Gas Operator | Jul 2025 |
| 28499 | T E F Inc | Madill, OK 73446-6656 | Oil & Gas Operator | Jul 2023 |
| 28500 | T E L Oil & Gas Corporation | Guymon, OK 73941 | Gas Operator | Apr 2025 |