UK distribution of Castle Brands' entire spirits portfolio - which includes Boru Vodka, Gosling's Rum and Pallini Liqueurs - has switched to Romsey-based United Brands.
The move puts commercial director Iain Stewart out of a job. Stewart, who set up Castle Brands Spirits Company GB in 2002, described the redundancy as a "complete shot out of the blue".
No official statement had been made as OLN went to press, but Paul Evans, a spokesman from Rumpus Communications, said: "The brands were growing in size and they needed to move up to the second stage. The only way to go was to a big distributor."
An official handover took place on April 1, said Evans.
Products supplied by United Brands, which was established in 2000, include XXX Tequila, ABK6 Cognac and Jefferson's Reserve.
Joint directors Rob Preston and Mark Dawkins invested in the company in January . The duo will focus on building a portfolio of strong premium spirits brands that complement their wine and imported lager brands.