(MENAFN) Qatar Investment Authority (QIA), the Gulf state's sovereign wealth fund, acquired a 5 percent stake in Xstrata, Reuters reported.
The move came ahead of the Xtrata's planned USD41 billion acquisition deal by commodities trader Glencore.
QIA, which owns stakes in Credit Suisse and supermarket chain Harrods, is currently the third largest share holder in the mining company after Glencore and asset manager BlackRock.
Qatar built up its USD2.65 billion shares in the world's fourth largest mining firm at current prices; through a series of stock market transactions which began soon after Glencore announced it was buying the company.
QIA, estimated to have assets of around USD100 billion, is widely seen as the most aggressive buyer in the world, turning the Gulf state's gas dollars into a range of Western assets including automakers, prime real estate and global banks.
Glencore, Xstrata merger deal could create a combined group worth more than USD79 billion, marking the industry's largest deal to date.