Whistl has taken leases on a total of 455,000 sq ft of warehousing space in Northamptonshire.
Its Whistl fulfilment division has taken 300,000 sq ft at Belkin House, Express Business Park, expanding its existing Rushden fulfilment capability.
It is also opening its fifth fulfilment centre, a 155,000 sq ft purpose-build depot located in Unit 3 Northampton GPark.
Whistl Chief Executive Nick Wells said: “Through Whistl Fulfilment we are bringing our people, our operational excellence and reputation for first class customer management to medium sized retailers who require an agile and scalable partner who can manage every aspect of the fulfilment process from placing an order to delivery to the consumer.”