26. Stone Group

Revenue: £146m (+13%)

Staff: 476

With 13 per cent revenue growth, according to numbers it shared with us, Stone Group jumped two places this year.

Owned by Converge Technology Solutions, Stone Group is a provider of IT solutions to UK public and private sector organisations of all sizes.

The company's vision is to make a true and lasting impact on the way IT is sold, providing a full circular procurement cycle to customers for the good of the environment and future generations.