56. NTT Security

Key points

Revenue: £65.3m (-10%)

Net profit: -11.7%

Staff: 270

Change is in the air at this cybersecurity integrator - formerly known as Integralis - after Japanese parent NTT announced in the summer that it is combining it with its other companies into one mammoth organisation named NTT Inc. NTT Security's UK arm saw net losses widen from £2.5m to £7.6m on revenues of £65.3m in its year to 31 March 2017, results it told us reflect its recent reinvention as a "centre of excellence" for the other NTT companies.