| L3Harris Technologies (LHX) |
| LabCorp (LH) |
| Lam Research (LRCX) |
| Lamb Weston Holdings (LW) |
| Largest private non-governmental companies |
| Largest venture capital |
| Larry Ellison |
| Larry Fink |
| Las Vegas Sands Corporation (LVS) |
| Lawrence "Larry" Page |
| Lawrence (Larry) Culp, Jr. |
| Lawson Whiting |
| LED display |
| Lee M Shavel |
| Legal tender |
| Legend Capital |
| Leidos (LDOS) |
| Lennar Corporation (LEN) |
| Leon Hess |
| Leon Topalian |
| Leonard "Len" Bosack |
| Leonard Green & Partners (LG&P) |
| Leonard Miller |
| Leonard S. Schleifer |
| LG Corporation |
| Liability |
| Liam K. Griffin |
| Liam Kelly |
| Libyan Investment Authority (LIA) |
| Lightspeed Venture Partners |
| Lillian Congdon |
| Limit order |
| Limited Liability Company (LLC) |
| Lincoln National Corporation (LNC) |
| Linde plc (LIN) |
| Liqudity |