| 16401 | Ladd Petroleum C | | Oil & Gas Operator | Sep 1989 |
| 16402 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 16403 | Ladder Energy Company | Tulsa, OK 74120-4281 | Oil & Gas Operator | Jan 2018 |
| 16404 | Laddex, LTD. | Amarillo, TX 79102 | Oil & Gas Operator | Jul 2025 |
| 16405 | Lafayette Oilfield Contractors, Inc. | | Oil Operator | Dec 2024 |
| 16406 | Lafonda Energy LLC | Vernon, TX 76384 | Oil Operator | Jul 2025 |
| 16407 | Lagarto Company, The | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 1995 |
| 16408 | Lagerquist, Walter G., Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2005 |
| 16409 | Lagniappe Interest Inc | Evergreen, CO 80439 | Oil & Gas Operator | Jun 2006 |
| 16410 | Lagniappe Interests, Inc. | | Oil & Gas Operator | Dec 2003 |
| 16411 | Lagniappe Operating, LLC | | Oil Operator | Dec 2024 |
| 16412 | Lagniappe Petrole, LLC | | Oil & Gas Operator | Mar 2025 |
| 16413 | Lago Petroleum Co. | | Oil & Gas Operator | Jan 1992 |
| 16414 | Lago VIsta Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 16415 | Lagoon Water Logistics LLC | Oklahoma City, OK 73103 | Oil Operator | Jul 2024 |
| 16416 | Laguna County Sanitation District | | Oil & Gas Operator | Dec 2003 |
| 16417 | Laguna Oil & Gas Corp. | Weesatche, TX 77993 | Oil & Gas Operator | Jul 2025 |
| 16418 | Laguna Petroleum Company | Casper, WY 82601 | Oil & Gas Operator | Dec 1982 |
| 16419 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 16420 | Lahd Energy Inc | Canton, OH 44709 | Gas Operator | Dec 2009 |
| 16421 | Lahoma Gas Company | | Gas Operator | Dec 1980 |
| 16422 | Lahoma Operating, Inc. | | Oil & Gas Operator | Apr 2025 |
| 16423 | Lahoma Production Inc | Jenks, OK 74037 | Oil & Gas Operator | Apr 2025 |
| 16424 | Lainco Well Service | Hamlin, TX 79520 | Oil & Gas Operator | Dec 1996 |
| 16425 | Lainco Well Service, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Aug 2011 |
| 16426 | Lainco, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Jul 2025 |
| 16427 | Laird Anita Louise | Asher, OK 74826-3215 | Oil Operator | Jun 2018 |
| 16428 | Laird Bill Oil Company | St Louis, OK 74866 | Oil & Gas Operator | Apr 2025 |
| 16429 | Lake A, LTD. | | Oil Operator | May 1998 |
| 16430 | Lake Country Disposal II LLC | Wilson, OK 73463 | Oil Operator | Apr 2025 |
| 16431 | Lake Country Disposal LLC | Ardmore, OK 73401 | Oil Operator | Oct 2024 |
| 16432 | Lake Crystal Operating LLC | Sugar Land, TX 77496 | Oil & Gas Operator | Jul 2025 |
| 16433 | Lake Energy LLC | Chagrin Falls, OH 44023 | Oil & Gas Operator | Dec 2024 |
| 16434 | Lake Erie Energy Part LLC | Erie, PA 16505-4760 | Oil & Gas Operator | Dec 2012 |
| 16435 | Lake Racourci Gath Sys, LLC | | Oil Operator | May 2004 |
| 16436 | Lake Region Oil Inc | Massillon, OH 44648 | Oil & Gas Operator | Dec 2024 |
| 16437 | Lake Ronel Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Jul 2017 |
| 16438 | Lakehills Production, Inc. | Austin, TX 78701 | Oil & Gas Operator | Jul 2025 |
| 16439 | Lakeland Pipeline Inc | Hominy, OK 74035-1006 | Oil & Gas Operator | Jun 2023 |
| 16440 | Lakes And Country Realty LLC | | Oil Operator | Mar 2015 |
| 16441 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Jul 2025 |
| 16442 | Lakeshore Petroleum Corp. | | Oil & Gas Operator | Dec 1992 |
| 16443 | Lakeside Resources | | Oil & Gas Operator | Mar 1989 |
| 16444 | Lakewood Disposal LLC | Tulsa, OK 74136-1031 | Oil Operator | Aug 2018 |
| 16445 | Lakewood Energy LLC | Dallas, TX 75214 | Oil & Gas Operator | Jul 2025 |
| 16446 | Lakewood Energy Solutions LLC | | Oil Operator | Jun 2016 |
| 16447 | Lakewood Oil Company LLC | Mission Hills, KS 66208-2735 | Oil & Gas Operator | May 2013 |
| 16448 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 16449 | Lakewood Petroleum | | Oil & Gas Operator | Sep 1993 |
| 16450 | Lakota Energy, LTD. | Paradise, TX 76073 | Oil & Gas Operator | Jul 2025 |
| 16451 | Lakota Oil & Gas | Comanche, OK 73529-9602 | Oil & Gas Operator | May 2014 |
| 16452 | Lakota Partnership | Denver, CO 80202 | Oil Operator | Oct 1990 |
| 16453 | Laloc | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2025 |
| 16454 | Lam Financial Holdings LTD | Denver, CO 80237 | Oil Operator | May 2025 |
| 16455 | Lama Energy, L.L.C. | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 16456 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Apr 2025 |
| 16457 | Lamar Energy | Nocona, TX 76255 | Oil Operator | Jul 2025 |
| 16458 | Lamar Energy LLC | | Oil & Gas Operator | Apr 2025 |
| 16459 | Lamar Exploration Corp | Orchard Park, NY 14217 | Gas Operator | Dec 1998 |
| 16460 | Lamar Hunt | | Oil & Gas Operator | Oct 2003 |
| 16461 | Lamar Hunt Trust Est Etal | | Oil & Gas Operator | Aug 1996 |
| 16462 | Lamar Hunt Trust Est. | | Oil & Gas Operator | Mar 1978 |
| 16463 | Lamar Matlock | | Oil Operator | Jan 2025 |
| 16464 | Lamar Oil & Gas Co., Inc. | | Oil & Gas Operator | Dec 2021 |
| 16465 | Lamar Oil & Gas Exploration | | Gas Operator | Oct 2013 |
| 16466 | Lamar Oil & Gas, Inc. | Rockport, TX 78381 | Oil & Gas Operator | Jul 2025 |
| 16467 | Lamar Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Oct 2015 |
| 16468 | Lamar Smith | | Oil Operator | Aug 1991 |
| 16469 | Lamarsa Corp. | Cut Bank, MT 59427 | Oil & Gas Operator | Apr 2025 |
| 16470 | Lamay Corporation | Rosenberg, TX 77471 | Oil & Gas Operator | Jul 2025 |
| 16471 | Lamb & Mize | Azle, TX 76020 | Oil & Gas Operator | Jul 2025 |
| 16472 | Lamb Alan L | Oklahoma City, OK 73120-7824 | Oil & Gas Operator | Feb 2020 |
| 16473 | Lamb, James L., Jr. | Austin, TX 78750 | Oil & Gas Operator | Mar 2016 |
| 16474 | Lamb, William Michael | Smithville, WV 26178 | Oil & Gas Operator | Dec 2021 |
| 16475 | Lambda Energy Resources LLC | | Oil & Gas Operator | May 2025 |
| 16476 | Lambdin William H | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 1998 |
| 16477 | Lambeck Petroleum, LLC | Stockdale, TX 78160 | Oil Operator | Jul 2025 |
| 16478 | Lamberd, Clayton | Olathe, KS 66061 | Oil Operator | Oct 2024 |
| 16479 | Lambert Company LLC | Healdton, OK 73438-0962 | Oil & Gas Operator | Apr 2025 |
| 16480 | Lambert Company The | Healdton, OK 73438-0962 | Oil & Gas Operator | Feb 2023 |
| 16481 | Lamberton Oil Co Inc | Tulsa, OK 74107 | Oil & Gas Operator | May 2013 |
| 16482 | Lamberton W J | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2015 |
| 16483 | Lamco Oil, LLC | Nocona, TX 76255 | Oil & Gas Operator | Jul 2025 |
| 16484 | Lamesa Crude | Abilene, TX 79605 | Oil & Gas Operator | Feb 2015 |
| 16485 | Lamima Corporation | Ardmore, OK 73401 | Oil Operator | Nov 1994 |
| 16486 | Lamkin Oil Company | Stephens, AR 71764 | Oil Operator | Jul 2024 |
| 16487 | Laml Compaines LLC | Cleveland, OK 74020 | Oil Operator | Apr 2025 |
| 16488 | Lammerts Robert P | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2002 |
| 16489 | Lampert Exploration Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 16490 | Lamson Petroleum Corporation | | Oil & Gas Operator | Mar 1993 |
| 16491 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 16492 | Lamson/Onshore Petroleum Corp. | | Oil & Gas Operator | Sep 1985 |
| 16493 | Lan Ma'S Oil And Gas LLC | Sugar Land, TX 77479 | Oil Operator | May 2025 |
| 16494 | Lancaster, Randy L. Dba Heritage Oil & Gas | Middlebourne, WV 26149 | Oil & Gas Operator | Dec 2021 |
| 16495 | Lance Exploration Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1994 |
| 16496 | Lance Gas & Oil Productions | | Oil & Gas Operator | Jan 2025 |
| 16497 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Jul 2025 |
| 16498 | Lance Oil & Gas Company Inc | Kirtland, NM 87417 | Oil & Gas Operator | Mar 2013 |
| 16499 | Lance Oil & Gas Productions | Bloomburg, TX 75556 | Oil & Gas Operator | Jul 2025 |
| 16500 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | May 2025 |