 | L-3 Communications | LLL
| $13,960,500,000 | 63,700 | 100 | | |
 | LexisNexis | | $2,600,000,000 | 13,000 | 100 | | |
 | Logitech | LOGI
| $2,066,570,000 | 7,431 | 30 | | |
 | LANDesk | AVCT
| $600,880,000 | 997 | 100 | | |
| Link | Lifetree Clinical Research | | $8,000,000 | 80 | 80 | | |
| Link | LBiSat | | $3,000,000 | 40 | 40 | | |
| Link | Lipocine | | $1,500,000 | 20 | 20 | | |
 | Lingotek | | $1,000,000 | | 15 | $2,580,000 | |
 | Liberty Smart | | $100,000 | 2 | 1 | | |
| Link | LanSchool Technologies | | | 0 | 0 | | |
 | LifeTech Research, Inc. | | | | | | |
 | LignUp | | | 40 | | | |
| Link | LineaGen Partners | | | 0 | 0 | | |
| Link | Litetouch, Inc. | | | 25 | 25 | | |
 | Linux Networx | | | 0 | 0 | $47,000,000 | |
 | Logoworks, Inc | | | 100 | 100 | $18,600,000 | |
| Link | LSK BioPartners, Inc. | | | 0 | 0 | | |
| Link | Luxal Corporation | | | 0 | 0 | | |
| Link | Lync.NET | | | 0 | 0 | | |
| Link | Lineo, Inc. | | | 185 | 185 | $25,220,000 | |
| Link | Linux Network, Inc. | | | 23 | 23 | $102,250,000 | |
| Link | Lead Media Partners | | | | | | |
|