Companies close to Russian billionaire Mikhail Prokhorov, head of Onexim group, will acquire all shares in investment and development group Open Investments (OPIN) owned by companies close to billionaire Vladimir Potanin's Interros group, the two companies said on Friday.

The value of the deal was not disclosed. The group's assets were estimated at $2 billion.

"Vladimir Potanin and Mikhail Prokhorov have agreed to terminate their joint trust. The trust agreement was signed by the parties on March 20, 2008 with trust manager Andrei Klishas to control joint assets. Today, the sides have signed several agreements that must regulate relations on the trust's assets and release each other from their mutual claims," the companies said in a statement.

OPIN, of which 30 percent belongs to Prokhorov's companies and 46 percent to Potanin's, was the last joint venture of the two tycoons, who have been dividing up their joint businesses for the last few years. It also included personal property of Prokhorov and Potanin.

"Onexim has always said that property management by the trust was unsatisfactory, while the purchase of OPIN fully integrates the business development strategy of the holding," an Onexim spokesman told RIA Novosti.

OPIN now sells A class office properties in Moscow, builds premium and economy class houses in Moscow region and shopping centers and hotels across Russia. OPIN is also the management company for the Sochi ski resort development.

MOSCOW, September 10 (RIA Novosti)