First Event achieved turnover of £4.5m in the year to 31 June 2009, which director Richard Murphy said was a record financial year for the agency.
The agency ran more than 40 events over the year, including 18 back-to-back incentives between May and June, and won four new clients.
First Event held a teambuilding event, which included crate-building, a high ropes challenge and sumo wrestling, to celebrate its anniversary.
"I am extremely proud of the team and their development is key to the company's growth," said Murphy. Teambuilding was a perfect choice to celebrate the milestone and the financial achievement. The event showed people who are not always on the front line how we execute events and it was the best social event we have done as a company."