Hank Greenberg, the former chief executive of insurer AIG on Tuesday prevailed in a high-profile legal battle with his former company after a federal jury ruled in his favour over claims related to a $4.3bn lawsuit.

The jury ruled that Mr Greenberg’s private investment firm, Starr International Company (Sico), did not breach a trust when it terminated a long-term compensation plan at the insurer four years ago and was not liable for about $4.3bn worth of shares held for that programme.