DANVERS, Mass.--(BUSINESS WIRE)--Abiomed, Inc. (NASDAQ: ABMD) today announced that the underwriters of its recent common stock offering have partially exercised their over-allotment option and purchased 80,068 additional shares of Abiomed common stock from the company. The over-allotment option was granted to the underwriters in connection with the offering of 5,000,000 shares of Abiomed common stock.