| 17501 | Locklin Exp & Prod Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2011 |
| 17502 | Lockout Corporation | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 17503 | Lockridge, John P | Denver, CO 80202 | Gas Operator | Mar 1999 |
| 17504 | Loco | Casper, WY 82602 | Oil & Gas Operator | Jul 2022 |
| 17505 | Loco Oil Company | Loco, OK 73442 | Oil Operator | Feb 1993 |
| 17506 | Locust Ridge Gas Company | | Oil Operator | Mar 2003 |
| 17507 | Lode Holdings, LLC | Wichita Falls, TX 76301 | Oil Operator | Dec 2025 |
| 17508 | Lodel Energy Resources Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 17509 | Lodestone Operating | Portland, TX 78374 | Oil & Gas Operator | Oct 2025 |
| 17510 | Lodestone Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2025 |
| 17511 | Lodi Drilling & Service Co. | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Dec 2025 |
| 17512 | Lodi Gas Storage L.L.C. | | Gas Operator | Nov 2025 |
| 17513 | Lodi Operating Company LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Dec 2025 |
| 17514 | Loe Oil & Gas Corporation | | Gas Operator | Dec 1977 |
| 17515 | Loe Petroleum & Environmental Engineering LLC | | Oil Operator | Oct 2025 |
| 17516 | Loe Pipe Yard, Inc. | | Oil & Gas Operator | Jan 1997 |
| 17517 | Loeb Bros., LLC | Lawrenceville, IL 62439 | Oil Operator | Dec 2016 |
| 17518 | Loeb Herman L | | Oil & Gas Operator | Jan 1996 |
| 17519 | Loeb LLC* Herman L | | Oil & Gas Operator | Nov 2025 |
| 17520 | Loeb, Herman L, LLC | Lawrenceville, IL 62439 | Oil Operator | Dec 2017 |
| 17521 | Loewen E K | | Oil Operator | Mar 1986 |
| 17522 | Loewen Operator | | Oil & Gas Operator | Mar 1995 |
| 17523 | Loewen Operator, Inc. | Canton, KS 67428 | Oil & Gas Operator | Sep 2025 |
| 17524 | Lofton, W. A. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 1998 |
| 17525 | Log Energy | MT Gilead, OH 43338 | Oil Operator | Dec 2024 |
| 17526 | Log Operating, LLC | Eagle Pass, TX 78853 | Oil & Gas Operator | Dec 2025 |
| 17527 | Logan Clay Prod Company | Logan, OH 43138 | Oil & Gas Operator | Dec 2005 |
| 17528 | Logan Energy Co. | Cross Plains, TX 76443 | Oil & Gas Operator | Nov 1997 |
| 17529 | Logan Gas Inc | Logan, OH 43138 | Oil & Gas Operator | Dec 2024 |
| 17530 | Logan Oil, LLC | | Oil & Gas Operator | May 2010 |
| 17531 | Logan Productions LLC | Wewoka, OK 74884 | Oil Operator | May 2025 |
| 17532 | Logas Energy, LLC | Lafayette, LA 70508 | Oil & Gas Operator | Dec 2025 |
| 17533 | Logos Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Nov 2025 |
| 17534 | Logsdon Richard | | Oil Operator | Mar 1988 |
| 17535 | Logue And Patterson, Inc. | | Oil & Gas Operator | Nov 1991 |
| 17536 | Loil Oil LLC | Golden, CO 80402 | Oil & Gas Operator | Nov 2025 |
| 17537 | Loin Energy Corporation | La Grange, TX 78945 | Oil & Gas Operator | Dec 2025 |
| 17538 | Lojac Resources LLC | Yukon, OK 73099-7309 | Oil Operator | Oct 2025 |
| 17539 | Loki Oil LLC | Cushing, OK 74023 | Oil & Gas Operator | Nov 2024 |
| 17540 | Lola Energy Petroco LLC | Canonsburg, PA 15317 | Gas Operator | Nov 2025 |
| 17541 | Lolocav, LLC | Sonora, TX 76950 | Oil & Gas Operator | Dec 2025 |
| 17542 | Loloff Construction Inc | | Oil & Gas Operator | Apr 2016 |
| 17543 | Loma Enterprises Inc | Cortland, OH 44410 | Oil & Gas Operator | Dec 1998 |
| 17544 | Loma Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2014 |
| 17545 | Loma VIsta Farms | Floresville, TX 78114 | Oil & Gas Operator | Jun 2019 |
| 17546 | Lomak Petroleum Michigan Inc | | Gas Operator | Jul 1992 |
| 17547 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 17548 | Loman Linda Gann | Norman, OK 73069-6548 | Oil Operator | Apr 2011 |
| 17549 | Lomax Exploration Company | Roosevelt, UT 84066 | Oil & Gas Operator | Jun 1995 |
| 17550 | Lomax Operating Company, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2011 |
| 17551 | London Petroleum Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 17552 | London William W | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2015 |
| 17553 | London William W Inc | Oklahoma City, OK 73116-5116 | Oil & Gas Operator | Apr 2016 |
| 17554 | Lone Eagle LLC | | Oil & Gas Operator | Dec 2003 |
| 17555 | Lone Jack Oil Co. | | Oil Operator | Sep 2025 |
| 17556 | Lone Mountain Prod | | Oil Operator | Dec 2018 |
| 17557 | Lone Mountain Production Company | | Oil & Gas Operator | Jan 2016 |
| 17558 | Lone MTN Production Co | Billings, MT 59108-0965 | Oil & Gas Operator | Jul 2019 |
| 17559 | Lone Oak Energy Inc | Kyle, TX 78640 | Oil & Gas Operator | Dec 2025 |
| 17560 | Lone Pine Operating Company, Inc. | Salem, WV 26426 | Oil & Gas Operator | Dec 2021 |
| 17561 | Lone Pine Production Assoc.,Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 1993 |
| 17562 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 17563 | Lone Star Interests, Inc. | Chanute, KS 66720 | Oil Operator | Sep 2001 |
| 17564 | Lone Star Land And Energy II LLC | Dallas, TX 75214 | Oil & Gas Operator | Jan 2020 |
| 17565 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 17566 | Lone Star Oil & Gas, Inc. | Greenville, KY 42345 | Oil & Gas Operator | Dec 2023 |
| 17567 | Lone Star Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2025 |
| 17568 | Lone Star Operating Company | Pearsall, TX 78061 | Oil & Gas Operator | Dec 2025 |
| 17569 | Lone Star Operations LLC | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2025 |
| 17570 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 17571 | Lone Star Production | Lawn, TX 79530 | Oil & Gas Operator | Dec 2025 |
| 17572 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 17573 | Lone Star Services | Pecos, TX 79772 | Oil & Gas Operator | Dec 2025 |
| 17574 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Dec 2025 |
| 17575 | Lone Wolf Oil & Gas Co., LLC | Moline, KS 67353 | Oil & Gas Operator | Sep 2025 |
| 17576 | Lone Wolf Oil LLC | Wellsville, KS 66092 | Oil Operator | Dec 2009 |
| 17577 | Lone Wolf Operating Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2005 |
| 17578 | Lone Wolf Operating Company, LP | Haxtun, CO 80731 | Oil & Gas Operator | Sep 2009 |
| 17579 | Lone Wolf Operating, LLC | Billings, MT 59108 | Oil & Gas Operator | Sep 2025 |
| 17580 | Lonesome B, LLC | Monahans, TX 79756 | Oil & Gas Operator | Dec 2025 |
| 17581 | Lonestar Foundation Inc. | | Oil Operator | Dec 2008 |
| 17582 | Lonestar Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 17583 | Lonestar Petroleum Services, LLC | Artesia, NM 88210 | Oil Operator | Nov 2025 |
| 17584 | Lonestar Production Services | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 17585 | Long Acres Prod. Co., Inc. | | Oil & Gas Operator | Aug 1986 |
| 17586 | Long And Ware Oil, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Jan 2021 |
| 17587 | Long Beach Oil Development Co | Glendale, CA 91203 | Oil & Gas Operator | Jun 2004 |
| 17588 | Long Bros. Oil Co. | | Oil Operator | Jul 2015 |
| 17589 | Long Drilling Company, LLC | Hamilton, KS 66853 | Oil Operator | Sep 2025 |
| 17590 | Long Engineering Company Inc | Oklahoma City, OK 73112-7769 | Oil Operator | Jun 2008 |
| 17591 | Long George L | San Antonio, TX 78209 | Oil & Gas Operator | Feb 1996 |
| 17592 | Long Jack Senior | | Oil Operator | Jan 2004 |
| 17593 | Long Oil & Natural Gas Corp. | | Oil & Gas Operator | Feb 1996 |
| 17594 | Long Oil And Gas Expl., LTD | | Oil & Gas Operator | Apr 1988 |
| 17595 | Long Operating, L.L.C. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2006 |
| 17596 | Long Petroleum, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2020 |
| 17597 | Long Phillip C | Muskogee, OK 74403 | Oil & Gas Operator | May 2013 |
| 17598 | Long Production LLC | Claremore, OK 74017-2808 | Oil & Gas Operator | Oct 2019 |
| 17599 | Long Resources Inc | Austin, TX 78730 | Oil & Gas Operator | Nov 2025 |
| 17600 | Long Royalty Company | Yukon, OK 73085 | Oil & Gas Operator | Jan 2004 |