Financial services business finnCap has signed a lease for the final floor of AshbyCapital and Helical’s City of London office building One Bartholomew.

It will occupy the fifth floor of the 19,609 sq ft, grade A building, taking it to fully let 12 months after it was completed.

The BREEAM Excellent building is located on Barts Square, a mixed-use development between St Paul’s and Smithfield. The scheme comprises around 250,000 sq ft of office space, 236 apartments and 10 retail and restaurant units.

“To have fully let One Bartholomew within twelve months of completion and launch is an excellent result and testament to the quality of the building and the fantastic environment we have created at Barts Square,” said Helical chief executive Gerald Kaye.

Ashby Capital chief executive Peter Ferrari added: “We are delighted the building is fully let at rents significantly beyond our initial expectations to provide an excellent addition to our growing portfolio of high quality assets.”

Commenting on its move to One Bartholomew, finnCap chief executive Sam Smith said: “We are excited to be moving into a building of the quality of One Bartholomew Close. We are confident that this will give a strong impression to our clients and a great working environment for our staff, in a very convenient location with excellent transport links and the forthcoming opening of Crossrail.”

The landlords were advised by Savills, Ingleby Trice and CBRE. Cummings Commercial acted for finnCap.