| 00458 | Kage Industrial Tool Supplies Ltd | YES | NO | | YES | YES | YES | NO | NO | NO |
| 01003W | Kaneco Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00905WB | Kapp & Peterson Ltd | YES | YES | Peterson of Dublin | YES | YES | YES | YES | YES | YES |
| 00382W | Karcher Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00544W | Karl Maybury & Company Ltd | YES | NO | Maybury Welding | YES | YES | YES | YES | YES | YES |
| 01536W | Karmarton Ltd | YES | NO | | N/A | N/A | N/A | N/A | N/A | YES |
| 01105W | Katerbay Ltd | YES | NO | | N/A | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending |
| 01083WB | Kavanagh Environmental Ltd | YES | YES | | YES | N/A | N/A | YES | YES | YES |
| 01468W | Kavanagh Refrigeration Ltd | YES | NO | | N/A | N/A | YES | YES | YES | YES |
| 01462W | KBR Food Service Equipment Ltd | YES | NO | | N/A | N/A | YES | YES | YES | YES |
| 00288WB | KCI Medical Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01371W | Keanes Wholesale Ltd | YES | NO | | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending |
| 01379WB | Keaney Medical Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 01255WB | Kelkin Ltd | YES | YES | | N/A | N/A | N/A | YES | YES | YES |
| 01151W | Kellett Catering Equipment Ltd | YES | NO | | N/A | YES | YES | YES | Reg-Pending | Reg-Pending |
| 01498W | Kelly Lighting Ltd | YES | NO | Shay Kelly Lighting | N/A | N/A | N/A | N/A | Reg-Pending | Reg-Pending |
| 01571B | Kenbay Recycling Solutions Ltd | NO | YES | Kenbay Electric Bikes | N/A | N/A | N/A | NO | NO | Reg-Pending |
| 00459W | Kendermar Ltd | YES | NO | | YES | YES | YES | YES | YES | NO |
| 01467W | Kenny Refrigeration & Catering Equipment Ltd | YES | NO | | N/A | N/A | NO | NO | Reg-Pending | Reg-Pending |
| 00375WB | Kenwood Ltd | YES | YES | Kenwood DeLonghi | YES | YES | YES | YES | YES | YES |
| 01374WB | Kertoy Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00682WB | Kestra Electro Weld Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 01201WB | Kestrel Communications Ltd | YES | YES | | N/A | YES | YES | YES | YES | Reg-Pending |
| 00082WB | Kevin Broderick Ltd | YES | YES | Broderick Grass Machinery | YES | YES | YES | YES | YES | YES |
| 00291WB | KeyMed (Ireland) Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01453WB | Keynote Music Sales Ltd | YES | YES | | NO | NO | NO | NO | Reg-Pending | Reg-Pending |
| 01247B | Kia Motors (UK) Ltd | NO | YES | Kia Motors Ireland | N/A | N/A | N/A | YES | YES | YES |
| 00389WB | Kilkenny Welding Supplies Limited | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 00056WB | Kitchen Accessories Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00316W | Kitchen Appliance Distributors Ltd | YES | NO | | YES | YES | YES | YES | YES | NO |
| 01015WB | KLA-Tencor Ireland Ltd | YES | NO | | N/A | N/A | YES | BATT Reg-Pending | Reg-Pending | Reg-Pending |
| 00744WB | Kleeneze Limited | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01472WB | KMI Distribution Ltd | YES | YES | | N/A | N/A | N/A | N/A | YES | YES |
| 00878WB | Komplett BV | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01017W | Kraft Foods Ireland Ltd | YES | NO | Kraft Foods | YES | YES | YES | YES | YES | Reg-Pending |
| 01002W | Kritman Company Ltd | YES | NO | Cork Lighting Supplies | N/A | N/A | YES | YES | YES | YES |
| 00609W | Kube Solutions Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01320WB | Kyron Energy & Power Ltd | YES | YES | | N/A | N/A | N/A | YES | YES | Reg-Pending |