| 27401 | Southridge Homes | | Oil & Gas Operator | Dec 1999 |
| 27402 | Southridge Operating Company | San Marcos, TX 78667 | Oil & Gas Operator | Jul 2025 |
| 27403 | Southstar Energy Corporation | Ardmore, OK 73401 | Gas Operator | Aug 1990 |
| 27404 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 27405 | Southstone Energy, LLC | Austin, TX 78735 | Oil Operator | Jul 2025 |
| 27406 | Southwell Russell C | Warren, PA 16365-3686 | Oil & Gas Operator | Dec 2022 |
| 27407 | Southwell William R | Warren, PA 16365-1259 | Oil & Gas Operator | Dec 2017 |
| 27408 | Southwest Energy Devel.,Inc. | Sugar Land, TX 77478 | Oil & Gas Operator | Jul 2007 |
| 27409 | Southwest Energy Development Inc | Bison, OK 73720 | Oil & Gas Operator | Apr 2025 |
| 27410 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 27411 | Southwest Gas Producing Co Inc | | Oil & Gas Operator | Nov 1994 |
| 27412 | Southwest Gas St | | Oil & Gas Operator | Dec 1981 |
| 27413 | Southwest Gas Storage Company | | Gas Operator | Mar 2025 |
| 27414 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Jul 2025 |
| 27415 | Southwest Gathering Company | Alice, TX 78332 | Oil & Gas Operator | Jul 2025 |
| 27416 | Southwest General Dev., Inc. | | Oil & Gas Operator | Dec 2003 |
| 27417 | Southwest Investment Fund, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Aug 2003 |
| 27418 | Southwest Land & Minerals, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Aug 2003 |
| 27419 | Southwest Loop 1604, LTD. | San Antonio, TX 78209 | Oil Operator | Sep 2022 |
| 27420 | Southwest Mississippi Oil & Gas, LLC. | | Oil Operator | May 2025 |
| 27421 | Southwest Oil & Land, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 1999 |
| 27422 | Southwest Oil Properties, Inc. | | Oil & Gas Operator | Feb 1996 |
| 27423 | Southwest Operating Company | Overland Park, KS 66212 | Oil & Gas Operator | Mar 2012 |
| 27424 | Southwest Operating Inc. | | Oil & Gas Operator | Dec 2024 |
| 27425 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Jul 2025 |
| 27426 | Southwest Petroleum | San Antonio, TX 78253 | Oil & Gas Operator | Jul 2025 |
| 27427 | Southwest Petroleum Corp | Drumright, OK 74030 | Oil & Gas Operator | Mar 2018 |
| 27428 | Southwest Petroleum Oil & Gas Explor LLC | San Bernardino, CA 92404-1010 | Oil & Gas Operator | Jun 2022 |
| 27429 | Southwest Production Co | Richardson, TX BADADDR | Oil & Gas Operator | Apr 1997 |
| 27430 | Southwest Resources, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Jul 2025 |
| 27431 | Southwest Rig Service | | Oil & Gas Operator | Nov 1998 |
| 27432 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 27433 | Southwest-Operating | Penwell, TX 79776 | Oil & Gas Operator | Jul 2025 |
| 27434 | Southwestern Electric Power Co | Dallas, TX 75266 | Oil & Gas Operator | Dec 1989 |
| 27435 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 27436 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Apr 2025 |
| 27437 | Southwestern Inc | Hobbs, NM 88240 | Oil Operator | Oct 2009 |
| 27438 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Jun 2025 |
| 27439 | Southwind Consulting | Pratt, KS 67124 | Oil Operator | Oct 1997 |
| 27440 | Southwind Exploration, LLC | Venice, FL 34293 | Oil & Gas Operator | Sep 2003 |
| 27441 | Southwind Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 27442 | Southwind Petroleum Corp. | Wichita, KS 67203 | Oil & Gas Operator | Jun 2022 |
| 27443 | Sovereign Eagle, LLC | Roswell, NM 88202 | Oil & Gas Operator | Jul 2018 |
| 27444 | Sovereign Energy Corp. | | Oil Operator | Dec 2001 |
| 27445 | Sovereign Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 27446 | Sovereign Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2016 |
| 27447 | Sovereign Petroleum Company, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2013 |
| 27448 | Sowers William & Sara | Blue Rock, OH 43720 | Oil Operator | Dec 2022 |
| 27449 | Sowle Exploratio | | Oil Operator | Aug 1986 |
| 27450 | Sowle Explorations | | Oil Operator | Dec 2002 |
| 27451 | Sozo Natural Resources LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 27452 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 27453 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 27454 | Spacht, James W. & Shelly F | Ripley, NY 14775 | Gas Operator | Dec 2024 |
| 27455 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Gas Operator | Jul 2025 |
| 27456 | Spain Oil Company | Somerset, TX 78069 | Oil & Gas Operator | Jul 2025 |
| 27457 | Spalding Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 27458 | Spalsbury, Arthur L | Hays, KS 67601 | Oil Operator | Aug 2001 |
| 27459 | Spark'S Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Nov 2014 |
| 27460 | Sparkman Energy, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Jul 2025 |
| 27461 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 27462 | Sparks Daniel M | Chickasha, OK 73023-1435 | Oil & Gas Operator | Apr 2014 |
| 27463 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | May 2025 |
| 27464 | Sparks Harold | Radnor, OH 43066 | Oil & Gas Operator | Dec 1987 |
| 27465 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | May 2025 |
| 27466 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 27467 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | May 2025 |
| 27468 | Sparks, Pearlman E | Mazie, KY 41160 | Oil Operator | Dec 2015 |
| 27469 | Sparks, Sidney A., Trustee | Alice, TX 78332 | Oil & Gas Operator | Jun 1996 |
| 27470 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | May 2025 |
| 27471 | Sparrow Oil & Gas LLC | | Oil & Gas Operator | Jun 2025 |
| 27472 | Sparrow Operating LLC | Comanche, OK 73529-9747 | Oil Operator | Apr 2025 |
| 27473 | Sparta Energy Corp | Oak Brook, IL 60521 | Oil & Gas Operator | Dec 1985 |
| 27474 | Sparta Exploration LLC | Houston, TX 77279 | Oil & Gas Operator | Jul 2025 |
| 27475 | Spartagus Corporation | Grand Saline, TX 75140 | Oil & Gas Operator | Sep 2004 |
| 27476 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 27477 | Spartan Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 2013 |
| 27478 | Spartan Petroleum Corporation | Houston, TX 77079 | Oil & Gas Operator | Oct 1987 |
| 27479 | Spartan Resource MGMT Corp | Rural Valley, PA 16249-0326 | Gas Operator | Dec 2024 |
| 27480 | Spartan Resources LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2025 |
| 27481 | Spartan Royalties, LLC | | Oil Operator | Dec 2024 |
| 27482 | SPC Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2024 |
| 27483 | Spear Production Company, Inc. | Shreveport, LA 71161 | Oil Operator | Jul 2025 |
| 27484 | Spearco Oil | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 27485 | Spearpoint Energy LLC | Seminole, OK 74818-1247 | Oil Operator | Jun 2015 |
| 27486 | Spears Terry | Osage, OK 74054 | Oil Operator | Oct 2024 |
| 27487 | Speartex Grain Company | Gruver, TX 79040 | Oil & Gas Operator | Jul 2025 |
| 27488 | Speartip Energy, LLC | Katy, TX 77450 | Oil Operator | Jul 2025 |
| 27489 | Specht Farms | Piqua, KS 66761 | Oil Operator | Nov 2009 |
| 27490 | Specht Oil | Iola, KS 66749 | Oil Operator | Mar 1998 |
| 27491 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2025 |
| 27492 | Special JHR Corp | Bridgeville, PA 15017 | Oil & Gas Operator | Jul 2025 |
| 27493 | Specialized Technological Threading, Inc., | | Oil & Gas Operator | Oct 2019 |
| 27494 | Speco Oil Company | | Oil & Gas Operator | Feb 1980 |
| 27495 | Spectral Oil & Gas Corporation | Humble, TX 77338 | Oil Operator | Jul 2025 |
| 27496 | Spectrum Energy Inc | Scottsdale, AZ 85257 | Oil & Gas Operator | Oct 2003 |
| 27497 | Spectrum Field Services Inc | Tulsa, OK 74136-3400 | Oil & Gas Operator | Jan 2004 |
| 27498 | Spectrum Oil Company | Irving, TX 75063 | Oil & Gas Operator | May 2013 |
| 27499 | Spectrum Oil Corporation | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 27500 | Spectrum Opco LLC | | Oil & Gas Operator | Nov 2024 |