| 01473W | L & H Ecotech Ltd | YES | NO | | N/A | N/A | N/A | N/A | YES | YES |
| 00767W | L.B.E. Ltd | YES | NO | Partners in Europe | N/A | YES | YES | YES | NO | NO |
| 00426WB | L.E.D. Lighting and Electrical Distribution Group | YES | YES | LED Group | YES | YES | YES | YES | YES | Reg-Pending |
| 00210WB | L.M. Ericsson Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 01327W | Labcyte Europe Ltd | YES | NO | | N/A | N/A | N/A | N/A | YES | YES |
| 00818W | Labkem Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01600WB | Laboratory Instruments and Supplies (I) Ltd | YES | YES | | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending |
| 00420WB | Laboratory Supplies Ltd | YES | YES | Lennox | YES | YES | YES | YES | YES | YES |
| 00280W | Labplan Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00695WB | Labquip (Ireland) Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00410WB | Lake Communications Ltd | YES | NO | | YES | YES | YES | YES | Reg-Pending | Reg-Pending |
| 01446WB | Lakuda ApS | YES | YES | BatteryCity.ie | NO | NO | NO | NO | Reg-Pending | Reg-Pending |
| 00715W | Lambrini Ltd | YES | NO | DNJ Power Tools | YES | YES | YES | YES | YES | Reg-Pending |
| 00894W | Lamp Source | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00478W | Lamps & Lighting Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01367B | Land Rover Ireland Ltd | NO | YES | | N/A | N/A | N/A | Reg-Pending | NO | NO |
| 00952WB | Leading Edge Marketing & Promotions Ltd | YES | YES | | YES | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | NO |
| 00873W | LED Lighting Concepts Ltd | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 00359WB | Legrand Ireland Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 01075W | Lennon & Harvey Ltd | YES | NO | Boyztoys | YES | YES | YES | YES | YES | NO |
| 00201WB | Lenovo (International) B.V. | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 00119WB | Lexmark International Service & Support Centre Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00282W | Leydens Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00850WB | LG Electronics U.K. Ltd | YES | YES | | N/A | YES | YES | YES | YES | YES |
| 00401W | Lidacel Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00207WB | Lidl Ireland GmbH | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01184WB | Light Solutions Engineering Ltd | YES | YES | Light Solutions | YES | YES | YES | YES | Reg-Pending | Reg-Pending |
| 01088W | Lighthouse Trading Company Ltd | YES | NO | | N/A | N/A | N/A | YES | YES | Reg-Pending |
| 01478B | Linde Material Handling (Ireland) Ltd | NO | YES | | N/A | N/A | N/A | Reg-Pending | Reg-Pending | Reg-Pending |
| 00962W | Living Green | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 01525W | Logomotion Limited | YES | NO | | NO | NO | NO | NO | NO | Reg-Pending |
| 01623WB | Longford Web | YES | YES | | NO | NO | NO | NO | NO | Reg-Pending |
| 00230W | Lotus Automation (Ireland) Ltd | YES | NO | | YES | YES | YES | YES | YES | Reg-Pending |
| 01029W | LR Active Ltd | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 00636W | LSI Storage Ireland Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00180W | Lumitech Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00926WB | Lyreco Ireland Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01305W | Lyric Ireland Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |