BSG raised £80m when it floated on AIM in June without the aid of a financial comms agency. The company's market value of over £230m makes it one of the index's largest companies.
It supplies data clearing and financial settlements products to the telecommunications industry. The products ensure, for example,
that different companies involved in calls between phone networks receive the payments they are owed.
Shortly after BSG's AIM flotation, T-Mobile renewed its contract with the company, which is forecast to make £24m this year.