The Qatar Investment Authority wants Sweden's regulator to speed up a decision on its suitability as an owner of OMX, a report said.

It wants the ruling to come at the same time as a ruling on rival Borse Dubai, daily Dagens Industri wrote on its Internet edition.

Quoting from Qatar's approval application, the newspaper said that failure to give a judgement about its and Dubai's suitability as owners of OMX at the same time would disadvantage OMX shareholders.

'Qatar Holding's ability to buy shares in OMX can be affected seriously negatively, and to the detriment of OMX shareholders if Qatar Holding does not get a decision from the Financial Services Authority at the same time as Borse Dubai does,' the paper quoted the document as saying. Qatar Holding is a QIA subsidiary.

Earlier in the day the QIA, through its Qatar Holding subsidiary, applied for approval to raise its stake in OMX to over 10 percent. Qatar has said it owns 9.98 percent of OMX shares.

Qatari Prime Minister Sheikh Hamad bin Jassim bin Jabr al-Thani, who also heads QIA, said on Tuesday the authority was considering taking over OMX and filed for regulatory approval to take a bigger stake in the Nordic firm.

Borse Dubai has teamed up with US exchange group Nasdaq in a bid for OMX, and the two groups said last week they controlled 47.6 percent of the firm, after raising their bid to 265 crowns per share. Borse Dubai and Nasdaq have already sought approval for ownership of OMX. -Reuters