LISLE, Ill. (AP) — Heading off a proxy war, heavy truck and engine company Navistar is adding a colleague of activist investor Carl Icahn and a former protege of his to its board.

Shares of Navistar added $1.60, or 7.5 percent, to close at $22.81 Monday. Over the past year, the stock has traded in a range of $19.79 to $48.18.