THB Group, which incorporates specialist insurer THB Clowes and financial advisers THB Financial Services, has expanded into a new headquarters in Warwick.
The custom-built HQ at Tachbrook Park was opened by Formula 1 team boss Sir Frank Williams.
THB Clowes chief executive Mike Wilson said: "Our success over recent years has led to the appointment of many new specialist and support staff. Eventually, with over 100 employees, we had simply out-grown our original home in the Parade and had to look for the right alternative. We now have a fantastic working environment which will allow our business to grow and prosper for generations to come."
Gary Guest, managing director of THB Financial Services, added: "Our new offices will provide greater opportunities both for individual staff members and for the group as a whole."
The firm teamed up with Birmingham developer Stoford on the deal.
Founded in 1977, THB Clowes is among the UK's leading broking companies with specialities including sport and high risk occupations, including war journalism and photography.
THB is adviser to the Williams F1 team. Sir Frank said: "I hope the new building provides THB Clowes with the platform for continued growth."