| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | L. W. Babcock | Oil Operator | Dec 1986 | |
| 2 | La Land Co. | Oil Operator | Dec 1989 | |
| 3 | LBTH Inc. | Oil & Gas Operator | Jun 2025 | |
| 4 | Leonard 1&2 LLC | Oil Operator | Jun 2025 | |
| 5 | Lesco Corp. | Oil Operator | Dec 2000 | |
| 6 | Linn Western Operating Inc. | Oil & Gas Operator | Jan 2018 | |
| 7 | Lion Oil & Gas Company LLC | Oil & Gas Operator | Dec 1993 | |
| 8 | Little Jewel LLC | Oil & Gas Operator | May 2025 | |
| 9 | Lonestar Foundation Inc. | Oil Operator | Dec 2008 | |
| 10 | Los Angeles Unified School District | Oil Operator | Dec 2014 | |
| 11 | Lyon Canyon Oil Corp. | Oil & Gas Operator | Dec 1986 |