German drug and chemicals giant Bayer has made an unsolicited takeover offer for Monsanto, the world's biggest seed company, as high inventories and low commodity prices spur consolidation in the global agrichemicals industry.
Monsanto disclosed the approach on Wednesday before Bayer confirmed its move, though neither released proposed deal terms.
With Monsanto worth $42 billion by market capitalization, an acquisition would likely be bigger than ChemChina's February deal to buy Swiss agrichemicals firm Syngenta for $43 billion - a target Monsanto itself pursued last year - and could face U.S. antitrust hurdles.
Monsanto said in a statement its board is reviewing the proposal, which is subject to due diligence, regulatory approvals and other conditions. There is no assurance that any transaction will take place, it said.
Bayer, which has a market value of $90 billion, said in a brief statement that its executives recently met executives of Monsanto to privately discuss a negotiated acquisition. A further statement will be made as appropriate, it said.
The proposal comes as Chinese state-backed ChemChina's deal for Syngenta faces intensive regulatory review in the United States over concerns about the security of U.S. food supply. The deal is the largest foreign acquisition ever by a Chinese company, as Beijing seeks to secure the country's own food supply.
Any deal between Bayer and Monsanto, meanwhile, could raise U.S. antitrust concerns because of the overlap in the seeds business, particularly in soybeans, cotton and canola, antitrust experts have said.