83. Sapphire Systems

Revenue: £54.3m (no change)

Staff: N/A

Due to a lack of new figures, we've recycled Sapphire's 2021 top line. That said, this has been an incredibly eventful year for Sapphire.

In September, the business appointed a new CEO, Ian Thomas, who was set to steer the business through a series of busy months.

That same month, the SAP-focused outfit announced it had bought Awen Collective - an operational technology (OT) cybersecurity software provider - with the goal of expanding its service offering and supporting clients looking to converge their IT and OT infrastructures.

Finally, in November, Sapphire itself was bought out by NTT DATA.