Cowen, an American multinational investment bank, completed the acquisition of Quarton, a financial services provider, for $105m. “Quarton International’s significant advisory business to the middle market in Europe and the US complements Cowen’s existing merger advisory platform, as well as our breadth and strength in capital markets activities. Together, our two companies create a global, cross-border investment banking platform that is not only dedicated to helping our clients consistently outperform, but also provides greater scale and revenue diversification enabling us to achieve our targeted returns on equity on a more sustainable basis,” Jeffrey M. Solomon, Cowen CEO.