| 1401 | Lyon Oil Company | | Oil Operator | Mar 1985 |
| 1402 | Lyon Operating Company Inc.(Iii) | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |
| 1403 | Lyon, John J. | Bozeman, MT 59718 | Oil & Gas Operator | Jun 2022 |
| 1404 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 1405 | Lyons & Prentiss | | Oil Operator | Jan 2025 |
| 1406 | Lyons Pet., McCain & Jackson | | Oil & Gas Operator | Dec 1981 |
| 1407 | Lyons Petroleum Inc.-Dykes | | Oil & Gas Operator | Oct 1988 |
| 1408 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 1409 | Lyons, Clarence Jr. | Chanute, KS 66720 | Oil Operator | Aug 2025 |
| 1410 | Lyons, Hilliard & Watson, Inc. | | Oil & Gas Operator | Jan 1989 |
| 1411 | Lyric Energy, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 1996 |
| 1412 | Lytle & Phillips | Mexia, TX 76667 | Oil & Gas Operator | Mar 2008 |
| 1413 | Lytle Creek Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Feb 2026 |
| 1414 | LZB Energy, LLC | Austin, TX 78737 | Gas Operator | Jul 2020 |
| 1415 | LZS Corporation | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2007 |