Prokhorov Said to Agree to Buy Kerimov’s Uralkali Stake

Billionaire Mikhail Prokhorov’s Onexim Group reached an agreement with Suleiman Kerimov and his partners to buy their 33 percent stake in potash producer OAO Uralkali, three people with knowledge of situation said.

The deal values the world’s largest producer of the soil nutrient at about $20 billion, the people said, asking not to be identified before an official statement. The stake held by Kerimov and his partners has a market value of about $5.2 billion. OAO Uralchem owner Dmitry Mazepin may join Onexim as a partner in the deal, two of the people said.