"I am honoured to be asked to join Zurich at this critical juncture for the insurance industry," Greco said in a statement. "Like many global players, the company has faced market challenges in recent times but I know that Zurich's strong global franchise, the breadth of talent and the powerful brand provide all of the ingredients for our future success."

Speculation that Generali CEO Greco, who ran Zurich's main general insurance business before joining Generali in August 2012, could return to the Swiss firm has been bubbling since mid-December. Earlier, Reuters reported that Greco was stepping down from Generali and was likely to rejoin Zurich.

(Reporting by Joshua Franklin; editing by David Clarke)

Stocks treated in this article : Assicurazioni Generali SpA, Zurich Insurance Group Ltd