Eidos, the computer-games publisher best known in the City for its "Lara Croft" game, has demanded that a leading broker reveal the identity of a secretive investor who has amassed a £12m stake in the firm.
Rumours of an imminent takeover bid for Eidos are widespread, as is speculation that Robert Bonnier, the controversial former chief executive of Scoot.com, is building a stake.
Last week GNI, the London-based derivatives broker, announced that it had acquired 7.2m shares shares [sic] in the computer-games company.
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Brokers say that GNI may have bought the shares to hedge a position possibly taken by Bonnier via a so-called "contract for difference" (CFD).