Voucher and gift-card retailer Park Group has taken 25,982 sq ft of space at 20 Chapel Street in Liverpool.
The company has signed a 10-year lease with landlord Canmoor for the third and fourth floors of the 15-storey building.
It is understood this marks the largest Liverpool city centre deal signed this year.
Park Group will retain its existing offices on Valley Road Industrial Estate in Birkenhead.
Since 2017, 20 Chapel Street has undergone a refurbishment programme and will be almost fully let following the deal.