| 301 | Sananco Energy Corp | Naples, FL 33941 | Oil & Gas Operator | Jul 2013 |
| 302 | Sanare Energy Partners, LLC | | Oil & Gas Operator | Dec 2024 |
| 303 | Sanchez Exploration Company LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2024 |
| 304 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 305 | Sanchez Production, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jun 2025 |
| 306 | Sanchez-O'Brien | | Oil & Gas Operator | Dec 1984 |
| 307 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 308 | Sanchez-Obrien Oil & Gas | | Oil & Gas Operator | Aug 1986 |
| 309 | Sancho Oil & Gas LLC | | Oil & Gas Operator | Dec 2021 |
| 310 | Sanco Operating Company | Bullard, TX 75757 | Oil & Gas Operator | Jun 2025 |
| 311 | Sand Bar Oil Com | | Oil Operator | Jun 1986 |
| 312 | Sand Boy Production Company | Bartlesville, OK 74003-9273 | Oil & Gas Operator | Jan 2025 |
| 313 | Sand Creek Oil Co., Inc. | Lubbock, TX 79413 | Oil & Gas Operator | Jul 2012 |
| 314 | Sand Creek Resources LLC | Woodward, OK 73801-5222 | Oil & Gas Operator | Mar 2025 |
| 315 | Sand Dollar Ener | | Oil Operator | Aug 1984 |
| 316 | Sand Dollar, LLC | Henderson, KY 42420 | Oil & Gas Operator | Dec 2018 |
| 317 | Sand Hawk, LLC | Devers, TX 77538 | Oil & Gas Operator | Jun 2025 |
| 318 | Sand Hill, LTD. | | Gas Operator | Dec 2024 |
| 319 | Sand Hills Society | | Gas Operator | Oct 2009 |
| 320 | Sand Point LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Dec 2020 |
| 321 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2025 |
| 322 | Sand Resources LLC | Norman, OK 73072-4805 | Oil & Gas Operator | Aug 2012 |
| 323 | Sand River O & E LLC | Amarillo, TX 79107 | Gas Operator | Dec 2004 |
| 324 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2025 |
| 325 | Sandalwood Exploration, L.P. | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 326 | Sandalwood Oil & Gas, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2025 |
| 327 | Sandbar Oil & Gas Co | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2024 |
| 328 | Sandco Oil & Gas, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2015 |
| 329 | Sandefer & Andress, Inc. | | Oil & Gas Operator | Apr 1982 |
| 330 | Sandefer Larry | | Oil Operator | Aug 1993 |
| 331 | Sandefer Petroleum Co. | | Oil & Gas Operator | Apr 1994 |
| 332 | Sandel Energy, Inc. | Huntsville, TX 77342 | Oil & Gas Operator | Apr 2004 |
| 333 | Sandel Operating Company | Huntsville, TX 77340 | Oil & Gas Operator | Jun 2025 |
| 334 | Sanders & Smith, L.C. | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2004 |
| 335 | Sanders Energy LLC | Aledo, TX 76008 | Oil & Gas Operator | Jun 2025 |
| 336 | Sanders Oil & Gas Co | Tyler, TX 75711 | Gas Operator | Aug 2017 |
| 337 | Sanders Oil & Gas, LTD. | Granbury, TX 76048 | Oil & Gas Operator | Aug 2015 |
| 338 | Sanders Petroleum Corp | Roswell, NM 88201 | Gas Operator | Oct 1996 |
| 339 | Sanders, Arthur J. | Wichita, KS 67217 | Oil Operator | Nov 1989 |
| 340 | Sanders, Jack W | Wellsville, KS 66092 | Oil Operator | Feb 1996 |
| 341 | Sanders, Larry E. Trustee | Longview, TX 75606 | Oil & Gas Operator | Jun 2025 |
| 342 | Sandhawk Energy, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2011 |
| 343 | Sandhill L.L.C. | Wichita, KS 67202 | Gas Operator | Jun 2003 |
| 344 | Sandhill Production Inc | Shongaloo, LA 71072 | Oil & Gas Operator | Dec 2019 |
| 345 | Sandhills Oil Co. | Copan, OK 74022 | Oil Operator | Aug 1997 |
| 346 | Sandia Energy Corporation-NM | Holdenville, OK 74848 | Oil & Gas Operator | Aug 2003 |
| 347 | Sandia Operating Corp. | San Antonio, TX 78270 | Oil & Gas Operator | May 2010 |
| 348 | Sandia Production Co., Inc. | Corrales, NM 87048 | Oil & Gas Operator | Jun 2025 |
| 349 | Sandler Raymond C | Los Angeles, CA 90067 | Oil Operator | Dec 1999 |
| 350 | Sandlin Oil Corp | Dacono, CO 80514 | Oil & Gas Operator | Apr 2025 |
| 351 | Sandlot Oil & Gas LLC | Gruver, TX 79040 | Oil & Gas Operator | Jun 2025 |
| 352 | Sandlott Energy (Jackie Brewer Dba) | Lovington, NM 88260 | Oil & Gas Operator | Dec 2024 |
| 353 | Sandman Exploration, L.L.C. | Georgetown, TX 78627 | Oil & Gas Operator | Jun 2025 |
| 354 | Sandollar Oil & Gas, Inc. | Hallsville, TX 75650 | Oil & Gas Operator | Feb 1993 |
| 355 | Sandor Petroleum Corporation | Crane, TX 79731 | Oil & Gas Operator | Jun 2025 |
| 356 | Sandpoint Energy Partners LLC | | Oil Operator | Jan 2025 |
| 357 | Sandpoint Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2025 |
| 358 | Sandpoint Texas LLC | Houston, TX 77270 | Oil Operator | Jun 2025 |
| 359 | Sandra Corporation (The) | Pampa, TX 79066-2474 | Gas Operator | Oct 1996 |
| 360 | Sandridge Energy Inc (Federal Wells Only) | | Oil & Gas Operator | Jun 2013 |
| 361 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 362 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jun 2025 |
| 363 | Sandridge Offshore, LLC | Houston, TX 77042 | Oil & Gas Operator | Apr 2014 |
| 364 | Sandridge Onshore, LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2014 |
| 365 | Sandridge Tertiary, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2012 |
| 366 | Sandrock Energy LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2025 |
| 367 | Sands Oil Company Inc | Billings, MT 59103 | Oil & Gas Operator | Mar 2025 |
| 368 | Sands-American Corp | | Oil & Gas Operator | Jan 1990 |
| 369 | Sandstone Dev LLC | Bradford, PA 16701-2922 | Oil & Gas Operator | Dec 2024 |
| 370 | Sandstone Hills Energy Inc | Seminole, OK 74818-1938 | Oil & Gas Operator | Sep 2014 |
| 371 | Sandstone Oil & Gas Development, LLC | Cyclone, PA 16726 | Oil Operator | Dec 2023 |
| 372 | Sandstone Operating Company, Inc | Odessa, TX 79762 | Oil & Gas Operator | Jul 1995 |
| 373 | Sandstone Resources | Saint Joseph, MO 64506 | Oil & Gas Operator | Dec 1995 |
| 374 | Sandstone Resources, Inc. | Houston, TX 77043 | Oil & Gas Operator | Jun 2025 |
| 375 | Sandstone Services, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 376 | Sandy Petroleum Inc | Shawnee, OK 74801-5634 | Oil & Gas Operator | Nov 2024 |
| 377 | Sandy Supply Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2014 |
| 378 | Sanford & Jenkins | Henryetta, OK 74437-1411 | Oil & Gas Operator | Mar 2015 |
| 379 | Sanford Casondra | Ada, OK 74820-4460 | Oil & Gas Operator | May 2013 |
| 380 | Sanford Resources Corp. | | Oil & Gas Operator | Jul 1998 |
| 381 | Sanford, Marion | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 382 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2025 |
| 383 | Sanguine, LTD | Tulsa, OK 74170 | Gas Operator | Oct 2003 |
| 384 | Sanhall Corporation | Huntsville, TX 77340 | Oil & Gas Operator | Oct 1993 |
| 385 | Sanner Jeffrey B Dba Bryant Lyn Production | Velma, OK 73491 | Oil Operator | Oct 2024 |
| 386 | Sanner Oil Co LLC | Duncan, OK 73533 | Oil Operator | Feb 2025 |
| 387 | Sanner Oil Company | Velma, OK 73491-0550 | Oil & Gas Operator | Jan 2014 |
| 388 | Sannes, Ronald M. Or Margaret Ann | Billings, MT 59103 | Oil & Gas Operator | Oct 2017 |
| 389 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 390 | Sanor Bruce | Salem, OH 44460 | Oil & Gas Operator | Dec 2024 |
| 391 | Sanovic Gas, LLC | Sewickley, PA 15143 | Gas Operator | Dec 2021 |
| 392 | Sanquip LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2024 |
| 393 | Santa Ana Canyon Dev. Corp. | | Oil & Gas Operator | Mar 2025 |
| 394 | Santa Anna Operating 3, LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Jun 2025 |
| 395 | Santa Anna Operating Co I, LLC | Abilene, TX 79608 | Oil & Gas Operator | Oct 2018 |
| 396 | Santa Fe Braun, Inc | Dallas, TX 75240-6620 | Oil & Gas Operator | Mar 1995 |
| 397 | Santa Fe Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 398 | Santa Fe Energy Op Partners LP | | Oil & Gas Operator | Oct 1989 |
| 399 | Santa Fe Energy Oper. Part., LP | Houston, TX 77057 | Oil & Gas Operator | Dec 1994 |
| 400 | Santa Fe Energy Operating Partner LP | Midland, TX 79701 | Oil & Gas Operator | Sep 2004 |