Bunge’s shares were up 5.6 percent in premarket trading. ADM, which is expected to report its quarterly results on Tuesday, was up more than a percent.
Last month media reported that ADM had proposed a takeover of Bunge.
The proposed deal comes as large grain traders that make money by buying, selling, storing and shipping crops have struggled in recent years with global oversupplies.
Thin margins have squeezed core commodity trading operations, including those of ADM, Bunge, Cargill Inc and Louis Dreyfus Co, which together are known as the “ABCDs” and dominate the industry.
New York-based Bunge, which rebuffed an acquisition offer from Glencore last year, operates in more than 40 countries and is Brazil’s largest exporter of agricultural products. Chicago-based ADM has customers in 160 countries.
As of Friday’s close, Bunge had a market value of about $11 billion, while ADM was valued at $23 billion.
Companies declined to comment.