| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | L & J Operating Inc | Gillette, WY 82718 | Oil & Gas Operator | Aug 2016 |
| 2 | L & R Drilling Company | Belle Fourche, SD 57717 | Oil & Gas Operator | Dec 1999 |
| 3 | L R Company | Casper, WY 82602 | Oil & Gas Operator | Sep 2007 |
| 4 | Ladd & Lukowicz | Oil & Gas Operator | May 1983 | |
| 5 | Lagniappe Interest Inc | Evergreen, CO 80439 | Oil & Gas Operator | Jun 2006 |
| 6 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |
| 7 | Lear Petroleum Exploration | Oil & Gas Operator | Jul 2013 | |
| 8 | Leeman Don J | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 1998 |
| 9 | Lewis Yale H | Oil & Gas Operator | Aug 1986 | |
| 10 | Lissolo J W | Yuma, AZ 85365 | Oil & Gas Operator | Feb 2017 |
| 11 | Lissolo Timothy C | Newcastle, WY 82701 | Oil Operator | Nov 2025 |
| 12 | Low D J | Littleton, CO 80127 | Oil Operator | Dec 1999 |