• Novi

• NP Group

• NSSL

• Nucleus VP

• NUI Galway

• NYSE Technologies

• O’Loughlin IT Support Ltd.

• O’Loughlin IT Support Ltd.

• O'Callaghan Insurances

• O'Callaghan Insurances Ltd.

• O'Reilly Recruitment

• Oak Recruitment

• Obelisk

• OCC Computer Personnel Limited.

• OCRex Ltd

• Ocuco

• 

  Ocuco Ltd

• Ocuco Ltd

• Odyssey VC

• óiliuna

• óiliuna

• Oiliuna Ltd

• Oiliuna Ltd

• Old Hat Ltd