Billionaire investor Carl Icahn, known for his strong-arm tactics in America’s boardrooms, tried to bury the hatchet on Wednesday with a host of former rivals, including fellow hedge fund manager William Ackman.

Less than six months after he fought with Ackman live on cable television and compared the hedge fund manager to a “cry baby” in a school yard, Icahn told investors at a conference on Wednesday that he won’t say anything bad about Ackman any more because he made a wealthy man even richer.