Syngenta Said to Build Defenses Against Another Monsanto Offer

Syngenta AG, the agrochemical maker that rejected an unsolicited $45 billion takeover offer from Monsanto Co., is building up defenses as it prepares for a possible higher bid from its U.S. rival, according to people with knowledge of the situation.

The Swiss maker of Polo and Force insecticides has added UBS Group AG to its stable of advisers to speak with investors and monitor changes in shareholdings, said the people, who asked not to be identified because the information is private. Syngenta expects that Monsanto could return as soon as next week with a bid that tops the unsuccessful 449 franc-a-share offer, they said.