29. Kainos Group plc
- Chief executive: Brendan Mooney
- Pre-tax profit: £13.3m
- Employment: 884
- Pay bill: £43.7m
Kainos, situated in the university area of Belfast, specialises in digital services and platforms, with clients in government and healthcare.
A trading update from the company in April, one of just three plcs in Northern Ireland, said employee and contractor numbers had grown by 200.