Amas Bank (Switzerland) Ltd has acquired 40 per cent stake in PATCO Investments & Consultancy Services Private Ltd. for an undisclosed amount. PATERSON is a Chennai-based stock broking firm, while Amas Bank is a global banking entity of the trans-national Hinduja Group, founded in 1978 as a finance company and granted banking license in 1994. Amas Bank is headquartered in Geneva, having offices in Zurich, Lucerne, Basle, St. Margrethen, Dubai, London, Paris, New York and Mauritius.