| 27601 | Southwell William R | Warren, PA 16365-1259 | Oil & Gas Operator | Dec 2017 |
| 27602 | Southwest Energy Devel.,Inc. | Sugar Land, TX 77478 | Oil & Gas Operator | Jul 2007 |
| 27603 | Southwest Energy Development Inc | Bison, OK 73720 | Oil & Gas Operator | Feb 2025 |
| 27604 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 27605 | Southwest Gas Producing Co Inc | | Oil & Gas Operator | Nov 1994 |
| 27606 | Southwest Gas St | | Oil & Gas Operator | Dec 1981 |
| 27607 | Southwest Gas Storage Company | | Gas Operator | Dec 2024 |
| 27608 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | May 2025 |
| 27609 | Southwest Gathering Company | Alice, TX 78332 | Oil & Gas Operator | May 2025 |
| 27610 | Southwest General Dev., Inc. | | Oil & Gas Operator | Dec 2003 |
| 27611 | Southwest Investment Fund, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Aug 2003 |
| 27612 | Southwest Land & Minerals, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Aug 2003 |
| 27613 | Southwest Loop 1604, LTD. | San Antonio, TX 78209 | Oil Operator | Sep 2022 |
| 27614 | Southwest Mississippi Oil & Gas, LLC. | | Oil Operator | Mar 2025 |
| 27615 | Southwest Oil & Land, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 1999 |
| 27616 | Southwest Oil Properties, Inc. | | Oil & Gas Operator | Feb 1996 |
| 27617 | Southwest Operating Company | Overland Park, KS 66212 | Oil & Gas Operator | Mar 2012 |
| 27618 | Southwest Operating Inc. | | Oil & Gas Operator | Dec 2024 |
| 27619 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | May 2025 |
| 27620 | Southwest Petroleum | San Antonio, TX 78253 | Oil & Gas Operator | May 2025 |
| 27621 | Southwest Petroleum Corp | Drumright, OK 74030 | Oil & Gas Operator | Mar 2018 |
| 27622 | Southwest Petroleum Oil & Gas Explor LLC | San Bernardino, CA 92404-1010 | Oil & Gas Operator | Jun 2022 |
| 27623 | Southwest Production Co | Richardson, TX BADADDR | Oil & Gas Operator | Apr 1997 |
| 27624 | Southwest Resources, Inc. | Brenham, TX 77834 | Oil & Gas Operator | May 2025 |
| 27625 | Southwest Rig Service | | Oil & Gas Operator | Nov 1998 |
| 27626 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 27627 | Southwest-Operating | Penwell, TX 79776 | Oil & Gas Operator | May 2025 |
| 27628 | Southwestern Electric Power Co | Dallas, TX 75266 | Oil & Gas Operator | Dec 1989 |
| 27629 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 27630 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Feb 2025 |
| 27631 | Southwestern Inc | Hobbs, NM 88240 | Oil Operator | Oct 2009 |
| 27632 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Mar 2025 |
| 27633 | Southwind Consulting | Pratt, KS 67124 | Oil Operator | Oct 1997 |
| 27634 | Southwind Exploration, LLC | Venice, FL 34293 | Oil & Gas Operator | Sep 2003 |
| 27635 | Southwind Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 27636 | Southwind Petroleum Corp. | Wichita, KS 67203 | Oil & Gas Operator | Jun 2022 |
| 27637 | Sovereign Eagle, LLC | Roswell, NM 88202 | Oil & Gas Operator | Jul 2018 |
| 27638 | Sovereign Energy Corp. | | Oil Operator | Dec 2001 |
| 27639 | Sovereign Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 27640 | Sovereign Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2016 |
| 27641 | Sovereign Petroleum Company, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2013 |
| 27642 | Sowers William & Sara | Blue Rock, OH 43720 | Oil Operator | Dec 2022 |
| 27643 | Sowle Exploratio | | Oil Operator | Aug 1986 |
| 27644 | Sowle Explorations | | Oil Operator | Dec 2002 |
| 27645 | Sozo Natural Resources LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 27646 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 27647 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | May 2025 |
| 27648 | Spacht, James W. & Shelly F | Ripley, NY 14775 | Gas Operator | Dec 2023 |
| 27649 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Gas Operator | May 2025 |
| 27650 | Spain Oil Company | Somerset, TX 78069 | Oil & Gas Operator | May 2025 |
| 27651 | Spalding Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 27652 | Spalsbury, Arthur L | Hays, KS 67601 | Oil Operator | Aug 2001 |
| 27653 | Spark'S Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Nov 2014 |
| 27654 | Sparkman Energy, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | May 2025 |
| 27655 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 27656 | Sparks Daniel M | Chickasha, OK 73023-1435 | Oil & Gas Operator | Apr 2014 |
| 27657 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | Feb 2025 |
| 27658 | Sparks Harold | Radnor, OH 43066 | Oil & Gas Operator | Dec 1987 |
| 27659 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Feb 2025 |
| 27660 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 27661 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Mar 2025 |
| 27662 | Sparks, Pearlman E | Mazie, KY 41160 | Oil Operator | Dec 2015 |
| 27663 | Sparks, Sidney A., Trustee | Alice, TX 78332 | Oil & Gas Operator | Jun 1996 |
| 27664 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Mar 2025 |
| 27665 | Sparrow Oil & Gas LLC | | Oil & Gas Operator | Apr 2025 |
| 27666 | Sparrow Operating LLC | Comanche, OK 73529-9747 | Oil Operator | Feb 2025 |
| 27667 | Sparta Energy Corp | Oak Brook, IL 60521 | Oil & Gas Operator | Dec 1985 |
| 27668 | Sparta Exploration LLC | Houston, TX 77279 | Oil & Gas Operator | May 2025 |
| 27669 | Spartagus Corporation | Grand Saline, TX 75140 | Oil & Gas Operator | Sep 2004 |
| 27670 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 27671 | Spartan Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 2013 |
| 27672 | Spartan Petroleum Corporation | Houston, TX 77079 | Oil & Gas Operator | Oct 1987 |
| 27673 | Spartan Resource MGMT Corp | Rural Valley, PA 16249-0326 | Gas Operator | Dec 2024 |
| 27674 | Spartan Resources LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 27675 | Spartan Royalties, LLC | | Oil Operator | Dec 2024 |
| 27676 | SPC Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2024 |
| 27677 | Spear Production Company, Inc. | Shreveport, LA 71161 | Oil Operator | May 2025 |
| 27678 | Spearco Oil | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 27679 | Spearpoint Energy LLC | Seminole, OK 74818-1247 | Oil Operator | Jun 2015 |
| 27680 | Spears Terry | Osage, OK 74054 | Oil Operator | Oct 2024 |
| 27681 | Speartex Grain Company | Gruver, TX 79040 | Oil & Gas Operator | May 2025 |
| 27682 | Speartip Energy, LLC | Katy, TX 77450 | Oil Operator | May 2025 |
| 27683 | Specht Farms | Piqua, KS 66761 | Oil Operator | Nov 2009 |
| 27684 | Specht Oil | Iola, KS 66749 | Oil Operator | Mar 1998 |
| 27685 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | May 2025 |
| 27686 | Special JHR Corp | Bridgeville, PA 15017 | Oil & Gas Operator | May 2025 |
| 27687 | Specialized Technological Threading, Inc., | | Oil & Gas Operator | Oct 2019 |
| 27688 | Speco Oil Company | | Oil & Gas Operator | Feb 1980 |
| 27689 | Spectral Oil & Gas Corporation | Humble, TX 77338 | Oil Operator | May 2025 |
| 27690 | Spectrum Energy Inc | Scottsdale, AZ 85257 | Oil & Gas Operator | Oct 2003 |
| 27691 | Spectrum Field Services Inc | Tulsa, OK 74136-3400 | Oil & Gas Operator | Jan 2004 |
| 27692 | Spectrum Oil Company | Irving, TX 75063 | Oil & Gas Operator | May 2013 |
| 27693 | Spectrum Oil Corporation | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 27694 | Spectrum Opco LLC | | Oil & Gas Operator | Nov 2024 |
| 27695 | Speed James F | Ada, OK 74821-1221 | Oil & Gas Operator | Nov 2009 |
| 27696 | Speed, F. Michael, Trustee | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Aug 1998 |
| 27697 | Speedy Well Service | | Oil & Gas Operator | Sep 2024 |
| 27698 | Speegle Oil And Gas Company | Longview, TX 75605 | Oil & Gas Operator | May 2025 |
| 27699 | Speer Kenneth G | Seminole, OK 74818-1202 | Oil & Gas Operator | Dec 2001 |
| 27700 | Speir R M Operating Company | Walters, OK 73572-3933 | Oil Operator | Feb 2025 |