These have grown to include the right to oil and diamond concessions, plus a stake in Congo's few remaining industrial giants, including the state copper company.

ECONOMIST: Congo

The newly-acquired 10.1% stake, plus Sport Direct's existing 15% stake in Umbro, mean any suitor would have a tougher battle ahead, say analysts.

BBC: JJB Sports acquires 10% of Umbro

His Tecnicas Reunidas holding, plus a 5% stake in Houston-based marine transport company Kirby Corp.

FORBES: Spanish Contractor Jose Llado Joins Billionaires Club