The recruitment of W follows a pitch process and comes as the brand shifts its comms strategy towards high-profile cross-platform events.
The account moved to Manifest only last March.
Referencing an agency portfolio that includes Hendrick's Gin and Soho House, Kopparberg head of marketing Rob Calder said: "We love the work that W has done across events, working with premium edgy brands. The agency gave us real confidence that it understands our brand – and our future direction."
Kopparberg turned over £120m last year – a rise of 24 per cent on 2012. It sells 40 per cent of its brewery output in the UK.