Spencer Holdings has let 2,014 sq ft Unit 2 at the business park in Chadderton, near Oldham, to electrical systems supplier Abca Systems.
Killingworth-based Abca Systems has agreed on a six year lease for an undisclosed rent.
David Nuttall, surveyor at Knight Frank, joint agent on Whitegate Business Park, said: "These units offer a high standard of accommodation on a secure site. Following this latest letting, the site is now full, which is testament to the quality of the units."
Colliers International was joint agent on the scheme.
Abca Systems also has offices in London, Leicester and Edinburgh.