By | May 11 2012 9:54 AM

The Qatar Investment Authority (QIA) is on an investment spree, bulking up its holdings in several major companies including Royal Dutch Shell Plc (NYSE: RDS.A), Eni SpA (NYSE: E), and Xstrata PLC (London: XTA), and the sovereign fund has already taken a holding Total SA (NYSE: TOT) and is pursuing avenues to invest in Glencore International Plc (London: GLEN), sources reported Friday.