| 26401 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 26402 | Sigma Corporation | Charleston, WV 25301-2644 | Gas Operator | Dec 2021 |
| 26403 | Sigma Energy & Explor., Co LLC | Ozona, TX 76943 | Oil & Gas Operator | Feb 2010 |
| 26404 | Sigma Energy, LLC | | Oil Operator | Jan 2025 |
| 26405 | Sigma Exploration Corp., The | Dallas, TX 75230 | Oil & Gas Operator | Sep 1998 |
| 26406 | Sigma Oper & Develop Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 26407 | Sigmon Production Company, Inc. | Longview, TX 75608 | Oil & Gas Operator | Dec 2013 |
| 26408 | Signal Hill Company LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2024 |
| 26409 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 26410 | Signal Hill Operating LLC | | Oil & Gas Operator | Jun 2026 |
| 26411 | Signal Hill Petroleum Inc. | | Oil & Gas Operator | May 2026 |
| 26412 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Jul 2026 |
| 26413 | Signal Oil Company, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2026 |
| 26414 | Signal Operating L.L.C. | | Oil Operator | Jan 2025 |
| 26415 | Signal Petroleum | | Oil & Gas Operator | Jul 1980 |
| 26416 | Signal, LLC | | Oil & Gas Operator | May 2026 |
| 26417 | Signal, LLC Of Mississippi | | Oil & Gas Operator | Dec 2024 |
| 26418 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 26419 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 26420 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 26421 | Sikes, Arlas M. | Brownwood, TX 76801 | Oil & Gas Operator | May 2000 |
| 26422 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 26423 | Silent Stone Energy LLC | | Oil & Gas Operator | Apr 2026 |
| 26424 | Silhan, Terry | Marion, KS 66861 | Oil & Gas Operator | Dec 2009 |
| 26425 | Silleman, Drew C. | Cattaraugus, NY 14719 | Gas Operator | Dec 2025 |
| 26426 | Siltstone Resources Op II, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Jul 2026 |
| 26427 | Silvco Energy, LLC | | Oil Operator | Apr 2014 |
| 26428 | Silver Anchor Resources LLC | Azle, TX 76020 | Oil & Gas Operator | Jul 2026 |
| 26429 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 26430 | Silver Creek Oil & Gas, Inc. | Wichita, KS 67203 | Oil Operator | Dec 1997 |
| 26431 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Jul 2026 |
| 26432 | Silver Creek Permian Op Co, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2023 |
| 26433 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 26434 | Silver Cross Energy Partners LLC | Richmond, TX 77469 | Oil & Gas Operator | Jul 2026 |
| 26435 | Silver Eagle Oil Company | Ada, OK 74820 | Oil Operator | Dec 2004 |
| 26436 | Silver Exploration Company | | Oil & Gas Operator | May 2026 |
| 26437 | Silver Fox Oil & Gas LLC | McAllen, TX 78504 | Oil & Gas Operator | Jul 2026 |
| 26438 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Jul 2026 |
| 26439 | Silver Hill Energy Partners, LLC | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 26440 | Silver Mountain Energy LLC | | Gas Operator | Dec 2025 |
| 26441 | Silver Oak Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2016 |
| 26442 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 26443 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2026 |
| 26444 | Silver Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Jul 2026 |
| 26445 | Silver Petroleum Inc | | Gas Operator | Dec 2001 |
| 26446 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Apr 2026 |
| 26447 | Silver Rock Energy, LLC | Terrell, TX 75160 | Oil Operator | Jul 2026 |
| 26448 | Silver Spike Energy Oper, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2015 |
| 26449 | Silver Spike Energy Operating Of NM, LLC | Midland, TX 79701 | Oil Operator | Jul 2016 |
| 26450 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2026 |
| 26451 | Silver Star Operating Co., LLC | Nada, TX 77460 | Gas Operator | Jul 2026 |
| 26452 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | May 2026 |
| 26453 | Silver Thread Oil & Gas, Inc. | | Oil & Gas Operator | Jul 2015 |
| 26454 | Silver Tusk Operating Co. LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2018 |
| 26455 | Silverado Oil Inc | Greeley, CO 80631 | Oil Operator | Apr 2000 |
| 26456 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 26457 | Silverado Operating LLC | Plntersville, TX 77363 | Oil Operator | Jul 2026 |
| 26458 | Silverback Operating II, LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | May 2026 |
| 26459 | Silverback Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2016 |
| 26460 | Silverbow Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 26461 | Silverbrook Operating II LLC | Barker, TX 77413 | Oil & Gas Operator | Jul 2026 |
| 26462 | Silverbrook Operating, LLC | Barker, TX 77413 | Oil & Gas Operator | Jul 2026 |
| 26463 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 26464 | Silvertin Farm Production LLC | Poteau, OK 74953 | Oil & Gas Operator | Apr 2020 |
| 26465 | Simar Petroleum, LLC | | Oil Operator | Dec 2024 |
| 26466 | Simasko Producti | | Oil Operator | Dec 1986 |
| 26467 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 26468 | Simata Energy | Midland, TX 79708 | Oil & Gas Operator | Jul 2026 |
| 26469 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Jul 2026 |
| 26470 | Simco Oil Company | | Oil Operator | Jul 1990 |
| 26471 | Simco Oil, LLC | Lytle, TX 78052 | Oil Operator | Jul 2026 |
| 26472 | Simco Operating | Shawnee, OK 74804-2501 | Oil Operator | Jan 2013 |
| 26473 | Simco Petroleum | Cheyenne, WY 82003 | Oil & Gas Operator | Oct 2009 |
| 26474 | Simcoe LLC | Durango, CO 81301 | Oil & Gas Operator | May 2026 |
| 26475 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 26476 | Simme, Steven | Elma, NY 14052 | Gas Operator | Dec 2025 |
| 26477 | Simminger, Robert John Jr | | Oil Operator | Dec 2025 |
| 26478 | Simmons Donald M | Muskogee, OK 74401 | Oil & Gas Operator | May 2013 |
| 26479 | Simmons Engr & Consulting Co | Farmington, NM 87499 | Gas Operator | Feb 2002 |
| 26480 | Simmons Evelyn B-Per Represent | Edmond, OK 73083-3610 | Oil & Gas Operator | Aug 1996 |
| 26481 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | May 2026 |
| 26482 | Simmons Oil Corp | | Oil Operator | Jan 1989 |
| 26483 | Simmons Robert Z | | Oil Operator | Dec 1990 |
| 26484 | Simmons, Inc.* D. J. | | Oil & Gas Operator | May 2020 |
| 26485 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 26486 | Simmons, Stanley J. | Olney, TX 76374 | Oil & Gas Operator | Aug 1994 |
| 26487 | Simon Joseph W | Carney, OK 74832-0443 | Oil & Gas Operator | Dec 2016 |
| 26488 | Simon Of Bolivar Enterprises Inc | Cuba, NY 14727 | Oil & Gas Operator | Dec 2025 |
| 26489 | Simon Oil Company | Ardmore, OK 73401 | Oil Operator | Apr 2026 |
| 26490 | Simon Oil LLC | Kaycee, WY 82639 | Oil Operator | Mar 2026 |
| 26491 | Simon Royce & Joyce | Tecumseh, OK 74873-7341 | Oil Operator | Jun 2018 |
| 26492 | Simon, W. D. Oil Co. | Kermit, TX 79745 | Oil & Gas Operator | Jul 2026 |
| 26493 | Simple Operating LLC | Cross Plains, TX 76443 | Oil Operator | Jul 2026 |
| 26494 | Simpson B T Jr | Orlando, FL 32806 | Oil & Gas Operator | Dec 1986 |
| 26495 | Simpson Bros. Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 26496 | Simpson Bros. Oil Co.-Odessa | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 26497 | Simpson Gary H | Albion, PA 16401-8008 | Gas Operator | Dec 2014 |
| 26498 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2026 |
| 26499 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 26500 | Simpson Operating Services, LP | Ballinger, TX 76821 | Oil & Gas Operator | Jul 2026 |