Melrose, an investment company which floated on the Alternative Investment Market (Aim) in October 2003, is to acquire Dynacast and McKechnie from Cinven. Under the terms of the deal, Melrose will give up its existing listing and the enlarged group will then be relisted on Aim. Cinven will take a 15% stake in Melrose, whose founding investors include Deutsche, Schroders and Fidelity.