Britannia Pharmaceuticals has taken office space at Green Park in Reading.
The company has taken 15,388 sq ft at 200 Longwater Avenue on a 10-year lease.
200 Longwater Avenue is a 46,366 sq ft building which has been refurbished to a Grade A specification.
Oxford Properties bought the Reading scheme for £400m back in 2011.
Maxwell Brown represented Britannia Pharmaceuticals.