Sanofi makes bid for Genzyme By: MarketWatch August 29, 2010 at 14:52 PM EDT French drug maker Sanofi-Aventis SA has offered to buy U.S. biotechnology company Genzyme Corp. for $18.5 billion, or $69 per share. Read More >> Related Stocks: Bhp Billiton Ltd ADR Hewlett-Packard Macy's Potash Corporation of Saskatchewan