LONDON, May 15 (Reuters) - SNC-Lavalin will not raise its offer for British engineering and construction firm WS Atkins unless it faces a rival bid for the British firm, the Canadian construction and engineering group said on Monday.
SNC-Lavalin agreed to buy WS Atkins last month in an all-cash C$3.6 billion ($2.63 billion) deal, at a price of 2,080 pence per share.
U.S. activist investor Elliott Capital Advisors bought a 6.8 percent in WS Atkins a day after the terms of the deal were announced.
The offer will only be increased if a third party announces a possible or firm offer for WS Atkins, SNC-Lavalin said in a statement. ($1 = 1.3666 Canadian dollars) (Reporting by Carolyn Cohn; Editing by Rachel Armstrong)