| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | L B Petroleum In | Oil Operator | Nov 1995 | |
| 2 | L-K Wireline, Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 3 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 4 | Landes Explorati | Oil Operator | Apr 1995 | |
| 5 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 6 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 7 | Larson Operating | Oil & Gas Operator | Mar 2001 | |
| 8 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |
| 9 | Lasmo Energy Cor | Oil Operator | Feb 1990 | |
| 10 | Lazer Petroleum | Oil Operator | Jan 1993 | |
| 11 | Leben Oil Corpor | Oil & Gas Operator | Apr 1991 | |
| 12 | Lloyd Drilling Company | Morland, KS 67650 | Oil Operator | Oct 2009 |