In December 2013, Ambu A/S issued 400,000 warrants, each warrant entitling the holder to subscribe for one Class B share with a nominal value of DKK 2.50. These warrants were issued to 52 employees with a vesting period of three years and may therefore be exercised in the trading window which was opened 9 November 2017 in connection with Ambu's Annual Report 2016/17.