| 27501 | Southern Star Operating, Inc. | | Oil & Gas Operator | Jun 2010 |
| 27502 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 27503 | Southern States Gas & Oil LTD | | Oil & Gas Operator | Jul 2004 |
| 27504 | Southern States Oil Production, LLC | | Oil & Gas Operator | Oct 2013 |
| 27505 | Southern States Petroleum Corp | | Oil Operator | Jan 1984 |
| 27506 | Southern Tejas Asset Group LLC | McAllen, TX 78501 | Oil & Gas Operator | Jun 2025 |
| 27507 | Southern Triangle Oil | | Oil & Gas Operator | Dec 2000 |
| 27508 | Southern Triangle Oil Co | MT Carmel, IL 62863 | Oil & Gas Operator | Dec 2023 |
| 27509 | Southern Union Exploration | | Oil Operator | Jan 1990 |
| 27510 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 27511 | Southern Union Production Co. | | Oil Operator | Apr 1979 |
| 27512 | Southern Water Disposal, LLC | | Oil & Gas Operator | Jan 2025 |
| 27513 | Southern Wells, Inc. | | Oil Operator | Sep 2002 |
| 27514 | Southern WV Oil & Gas | | Gas Operator | Dec 2021 |
| 27515 | Southfourk Partners LLC | Blanchard, OK 73010-7209 | Oil Operator | Feb 2025 |
| 27516 | Southlake Exploration, Inc. | Southlake, TX 76092 | Oil & Gas Operator | Jun 2025 |
| 27517 | Southlake Operating LLC | Weatherford, TX 76086 | Oil & Gas Operator | Jun 2025 |
| 27518 | Southland Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Aug 2022 |
| 27519 | Southland Royalt | | Oil & Gas Operator | Nov 1993 |
| 27520 | Southland Royalty Co.-Midland | Midland, TX 79702 | Oil & Gas Operator | Mar 1996 |
| 27521 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 27522 | Southland Royalty Company LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2021 |
| 27523 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 27524 | Southridge Homes | | Oil & Gas Operator | Dec 1999 |
| 27525 | Southridge Operating Company | San Marcos, TX 78667 | Oil & Gas Operator | Jun 2025 |
| 27526 | Southstar Energy Corporation | Ardmore, OK 73401 | Gas Operator | Aug 1990 |
| 27527 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 27528 | Southstone Energy, LLC | Austin, TX 78735 | Oil Operator | Jun 2025 |
| 27529 | Southwell Russell C | Warren, PA 16365-3686 | Oil & Gas Operator | Dec 2022 |
| 27530 | Southwell William R | Warren, PA 16365-1259 | Oil & Gas Operator | Dec 2017 |
| 27531 | Southwest Energy Devel.,Inc. | Sugar Land, TX 77478 | Oil & Gas Operator | Jul 2007 |
| 27532 | Southwest Energy Development Inc | Bison, OK 73720 | Oil & Gas Operator | Feb 2025 |
| 27533 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 27534 | Southwest Gas Producing Co Inc | | Oil & Gas Operator | Nov 1994 |
| 27535 | Southwest Gas St | | Oil & Gas Operator | Dec 1981 |
| 27536 | Southwest Gas Storage Company | | Gas Operator | Feb 2025 |
| 27537 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Jun 2025 |
| 27538 | Southwest Gathering Company | Alice, TX 78332 | Oil & Gas Operator | Jun 2025 |
| 27539 | Southwest General Dev., Inc. | | Oil & Gas Operator | Dec 2003 |
| 27540 | Southwest Investment Fund, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Aug 2003 |
| 27541 | Southwest Land & Minerals, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Aug 2003 |
| 27542 | Southwest Loop 1604, LTD. | San Antonio, TX 78209 | Oil Operator | Sep 2022 |
| 27543 | Southwest Mississippi Oil & Gas, LLC. | | Oil Operator | Mar 2025 |
| 27544 | Southwest Oil & Land, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 1999 |
| 27545 | Southwest Oil Properties, Inc. | | Oil & Gas Operator | Feb 1996 |
| 27546 | Southwest Operating Company | Overland Park, KS 66212 | Oil & Gas Operator | Mar 2012 |
| 27547 | Southwest Operating Inc. | | Oil & Gas Operator | Dec 2024 |
| 27548 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Jun 2025 |
| 27549 | Southwest Petroleum | San Antonio, TX 78253 | Oil & Gas Operator | Jun 2025 |
| 27550 | Southwest Petroleum Corp | Drumright, OK 74030 | Oil & Gas Operator | Mar 2018 |
| 27551 | Southwest Petroleum Oil & Gas Explor LLC | San Bernardino, CA 92404-1010 | Oil & Gas Operator | Jun 2022 |
| 27552 | Southwest Production Co | Richardson, TX BADADDR | Oil & Gas Operator | Apr 1997 |
| 27553 | Southwest Resources, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Jun 2025 |
| 27554 | Southwest Rig Service | | Oil & Gas Operator | Nov 1998 |
| 27555 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 27556 | Southwest-Operating | Penwell, TX 79776 | Oil & Gas Operator | Jun 2025 |
| 27557 | Southwestern Electric Power Co | Dallas, TX 75266 | Oil & Gas Operator | Dec 1989 |
| 27558 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 27559 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Apr 2025 |
| 27560 | Southwestern Inc | Hobbs, NM 88240 | Oil Operator | Oct 2009 |
| 27561 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Apr 2025 |
| 27562 | Southwind Consulting | Pratt, KS 67124 | Oil Operator | Oct 1997 |
| 27563 | Southwind Exploration, LLC | Venice, FL 34293 | Oil & Gas Operator | Sep 2003 |
| 27564 | Southwind Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 27565 | Southwind Petroleum Corp. | Wichita, KS 67203 | Oil & Gas Operator | Jun 2022 |
| 27566 | Sovereign Eagle, LLC | Roswell, NM 88202 | Oil & Gas Operator | Jul 2018 |
| 27567 | Sovereign Energy Corp. | | Oil Operator | Dec 2001 |
| 27568 | Sovereign Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 27569 | Sovereign Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2016 |
| 27570 | Sovereign Petroleum Company, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2013 |
| 27571 | Sowers William & Sara | Blue Rock, OH 43720 | Oil Operator | Dec 2022 |
| 27572 | Sowle Exploratio | | Oil Operator | Aug 1986 |
| 27573 | Sowle Explorations | | Oil Operator | Dec 2002 |
| 27574 | Sozo Natural Resources LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 27575 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 27576 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jun 2025 |
| 27577 | Spacht, James W. & Shelly F | Ripley, NY 14775 | Gas Operator | Dec 2023 |
| 27578 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Gas Operator | Jun 2025 |
| 27579 | Spain Oil Company | Somerset, TX 78069 | Oil & Gas Operator | Jun 2025 |
| 27580 | Spalding Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2025 |
| 27581 | Spalsbury, Arthur L | Hays, KS 67601 | Oil Operator | Aug 2001 |
| 27582 | Spark'S Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Nov 2014 |
| 27583 | Sparkman Energy, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Jun 2025 |
| 27584 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 27585 | Sparks Daniel M | Chickasha, OK 73023-1435 | Oil & Gas Operator | Apr 2014 |
| 27586 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | Mar 2025 |
| 27587 | Sparks Harold | Radnor, OH 43066 | Oil & Gas Operator | Dec 1987 |
| 27588 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Feb 2025 |
| 27589 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 27590 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Apr 2025 |
| 27591 | Sparks, Pearlman E | Mazie, KY 41160 | Oil Operator | Dec 2015 |
| 27592 | Sparks, Sidney A., Trustee | Alice, TX 78332 | Oil & Gas Operator | Jun 1996 |
| 27593 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Mar 2025 |
| 27594 | Sparrow Oil & Gas LLC | | Oil & Gas Operator | May 2025 |
| 27595 | Sparrow Operating LLC | Comanche, OK 73529-9747 | Oil Operator | Apr 2025 |
| 27596 | Sparta Energy Corp | Oak Brook, IL 60521 | Oil & Gas Operator | Dec 1985 |
| 27597 | Sparta Exploration LLC | Houston, TX 77279 | Oil & Gas Operator | Jun 2025 |
| 27598 | Spartagus Corporation | Grand Saline, TX 75140 | Oil & Gas Operator | Sep 2004 |
| 27599 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 27600 | Spartan Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 2013 |