| 401 | South Ranch Corporation | Austin, TX 78711-3062 | Oil Operator | Sep 2019 |
| 402 | South Ranch Oil Company Inc | St. Louis, MO 63124 | Oil Operator | Sep 1996 |
| 403 | South Sands Exploration LLC | Henryetta, OK 74437-4208 | Oil & Gas Operator | Feb 2024 |
| 404 | Southbrook Energies Inc | Tulsa, OK 74153 | Oil Operator | Feb 2004 |
| 405 | Southcreek Petroleum Co LLC | | Oil & Gas Operator | Oct 2023 |
| 406 | Southerland Jackie Dale Dba Skyden Oil | | Oil & Gas Operator | Feb 2024 |
| 407 | Southerland Joe Don Dba Taylor Oil Co | Velma, OK 73491 | Oil & Gas Operator | Feb 2024 |
| 408 | Southerland Marquieta Dba Keta Oil Company | Loco, OK 73442-1815 | Oil & Gas Operator | Feb 2024 |
| 409 | Southern Int'L Inc | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2007 |
| 410 | Southern Management Inc | Camargo, OK 73835 | Oil Operator | Jun 1992 |
| 411 | Southern Mineral Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2001 |
| 412 | Southern Oklahoma Production | | Oil Operator | Mar 2024 |
| 413 | Southern Operating Corporation | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 414 | Southern Production Co | Healdton, OK 73438-0400 | Oil & Gas Operator | Feb 2024 |
| 415 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Feb 2024 |
| 416 | Southern Star Central Gas Pipeline, Inc. | Owensboro, KY 42301 | Oil & Gas Operator | Feb 2024 |
| 417 | Southern Star Operating LLC | | Oil & Gas Operator | Jun 2017 |
| 418 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 419 | Southfourk Partners LLC | | Oil Operator | Mar 2024 |
| 420 | Southland Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Aug 2022 |
| 421 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 422 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 423 | Southstar Energy Corporation | Ardmore, OK 73401 | Gas Operator | Aug 1990 |
| 424 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 425 | Southwest Energy Development Inc | Waukomis, OK 73720-0022 | Oil & Gas Operator | Feb 2024 |
| 426 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 427 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 428 | Southwest Petroleum Corp | Drumright, OK 74030-0552 | Oil & Gas Operator | Mar 2018 |
| 429 | Southwest Petroleum Oil & Gas Explor LLC | San Bernardino, CA 92404-1010 | Oil & Gas Operator | Jun 2022 |
| 430 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 431 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Mar 2024 |
| 432 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 433 | Spark'S Energy Inc | Perry, OK 73077-0587 | Oil & Gas Operator | Nov 2014 |
| 434 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 435 | Sparks Daniel M | Chickasha, OK 73023-1435 | Oil & Gas Operator | Apr 2014 |
| 436 | Sparks Greg | Afton, OK 74331-3897 | Oil & Gas Operator | Feb 2024 |
| 437 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Feb 2024 |
| 438 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 439 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Feb 2024 |
| 440 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Feb 2024 |
| 441 | Sparrow Operating LLC | Comanche, OK 73529-9747 | Oil Operator | Feb 2024 |
| 442 | Sparta Energy LLC | Edmond, OK 73083-8158 | Oil & Gas Operator | May 2020 |
| 443 | Spartan Resources LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Mar 2024 |
| 444 | Spearpoint Energy LLC | Seminole, OK 74818-1247 | Oil Operator | Jun 2015 |
| 445 | Spears Terry | Osage, OK 74054 | Oil Operator | Nov 2023 |
| 446 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | May 2024 |
| 447 | Spectrum Energy Inc | Scottsdale, AZ 85257 | Oil & Gas Operator | Oct 2003 |
| 448 | Spectrum Field Services Inc | Tulsa, OK 74136-3400 | Oil & Gas Operator | Jan 2004 |
| 449 | Spectrum Oil Company | Irving, TX 75063 | Oil & Gas Operator | May 2013 |
| 450 | Spectrum Resources LLC | Charlotte, NC 28211-4081 | Oil Operator | Oct 2009 |
| 451 | Speed James F | Ada, OK 74821-1221 | Oil & Gas Operator | Nov 2009 |
| 452 | Speer Kenneth G | Seminole, OK 74818-1202 | Oil & Gas Operator | Dec 2001 |
| 453 | Speir R M Operating Company | Jacksonville, TX 75766-8155 | Oil Operator | Feb 2024 |
| 454 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2024 |
| 455 | Spencer Kevin LLC | Drumright, OK 74030-5825 | Oil & Gas Operator | Sep 2019 |
| 456 | Spencer Oil Company | Borger, TX 79007 | Oil & Gas Operator | Feb 2024 |
| 457 | Spencer Oil Company LLC | Dewey, OK 74029-0416 | Oil Operator | Jan 2015 |
| 458 | Sperry R J | Dallas, TX 75254-8647 | Oil & Gas Operator | Aug 2013 |
| 459 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Mar 2024 |
| 460 | Spicer Oil Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2008 |
| 461 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | May 2024 |
| 462 | Spirit Energy Inc | Edmond, OK 73034 | Oil & Gas Operator | Apr 1999 |
| 463 | Spitfire Energy Group LLC | | Oil Operator | Apr 2023 |
| 464 | Splawn & Splawn | Saint Louis, OK 74866-0098 | Oil & Gas Operator | Feb 2024 |
| 465 | Spragins Ed S | Wichita Falls, TX 76308-0670 | Oil & Gas Operator | Mar 2024 |
| 466 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Mar 2024 |
| 467 | Spring Resources, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2007 |
| 468 | Spring Tide Petroleum Inc | Broken Arrow, OK 74011-6651 | Oil & Gas Operator | Feb 2024 |
| 469 | Spring Valley Oil & Gas Inc | Drummond, OK 73735-0175 | Oil & Gas Operator | Mar 2024 |
| 470 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | May 2024 |
| 471 | Spur Operating Co. | Austin, TX 78701 | Oil & Gas Operator | May 2024 |
| 472 | Spurgeon William Allan | Nowata, OK 74048-9713 | Oil Operator | Feb 2010 |
| 473 | Spurgeon William C & Tammy D | Hominy, OK 74035 | Oil & Gas Operator | Feb 2024 |
| 474 | Squirrel Oil & Gas Inc | Blackwell, OK 74631-0248 | Oil & Gas Operator | Mar 2022 |
| 475 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 476 | SSB Production LC | Ardmore, OK 73402-0998 | Oil & Gas Operator | Mar 2024 |
| 477 | St Oil Company LLC | | Oil Operator | Mar 2024 |
| 478 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 479 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 480 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 481 | Staats & Martin | | Oil Operator | Aug 2013 |
| 482 | Staats, William N | | Oil & Gas Operator | Feb 2024 |
| 483 | Stacy Operating LLC | Cushing, OK 74023-0511 | Oil & Gas Operator | Feb 2024 |
| 484 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 485 | Staghorn Petroleum II LLC | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2024 |
| 486 | Staghorn Petroleum LLC | | Oil & Gas Operator | Feb 2024 |
| 487 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 488 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 489 | Stalnaker Oil Company | Maud, OK 74854-0295 | Oil Operator | May 2017 |
| 490 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 491 | Stamic Oil LLC | Duncan, OK 73534-1898 | Oil & Gas Operator | Oct 2021 |
| 492 | Standard Energy Inc | | Oil Operator | Feb 1997 |
| 493 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 494 | Stanton Joni Dba Stanton Oil | | Oil Operator | Feb 2024 |
| 495 | Stanton Leo F & Leo H | Wynona, OK 74084 | Oil & Gas Operator | Jun 1999 |
| 496 | Star Oil Company | Wichita, KS 67230 | Oil & Gas Operator | Feb 2024 |
| 497 | Star Resources LLC | Englewood, CO 80155-5185 | Oil & Gas Operator | Dec 2013 |
| 498 | Starbrite Energy LLC | Enid, OK 73702-0549 | Oil & Gas Operator | Oct 2018 |
| 499 | Stargas Co | Tulsa, OK 74136-5407 | Oil & Gas Operator | Aug 2013 |
| 500 | Stark Oil Properties | Asher, OK 74826 | Oil & Gas Operator | Jan 1997 |