A.P. Moller Maersk Group Chief Executive Nils Andersen has returned to his position after a four-month leave to recover from corrective heart valve surgery, the company said Monday. “Having participated in a number of meetings and having been updated on our activities during the last couple of weeks, I am now ready to return to work,” Andersen said in a statement. “The business has continued at full pace while I have been away. There is a lot of activity in our markets a...