Borse Dubai, which has bid $4.9 billion (Dh17.9 billion) for stock exchange owner and operator OMX said on Friday it would register a supplement to its bid after OMX published its full-year accounts this week.
A spokesman said the supplement was purely an administrative step.
"We don't think there is any new information that could affect the value [of OMX]," he said.
In a complex deal Borse Dubai will buy OMX and will pass on the Nordic and Baltic bourse firm to Nasdaq in return for a holding in the merged companies.
"Yesterday OMX made public its Financial Report Year End 2007. As the report contains information that may affect the assessment of the offer, Borse Dubai will issue a supplement to its offer document," Borse Dubai said in a statement.
"The OMX shareholders will have a right to withdraw their acceptances of the offer during five business days from the registration and publication of the supplement.
Borse Dubai said it will extend the offer period by five days. (Reuters)
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