Nasdaq Chief Executive Bob Greifeld said Wednesday that shareholders in Nordic bourse operator OMX would benefit from a linkup with the U.S.-based exchange, enabling the combined company to expand its business with Russian and eastern European companies.

"This will allow us to be in the best position to win more European IPOs (initial public offerings) ... to clearly win IPOs in the Russian, eastern Europe, central European environment," Greifeld told reporters. "This would allow both organizations really to be in the forefront of the globalization of exchanges (and) to compete very successfully across Europe."