On May 25, 2007, NASDAQ agreed to buy OMX for US$3.7 billion.[14] In August 2007, however, Borse Dubai offered US$4 billion, prompting speculation of a bidding war.[15] On September 20 2007, Borse Dubai agreed to stop competing to buy OMX in return for a 20% stake and 5 percent of votes in NASDAQ as well as NASDAQ’s then 28% stake in the London Stock Exchange.[16] In a complex transaction, Borse Dubai acquired 97.2% of OMX’s outstanding shares before selling them onto NASDAQ.[17] The newly merged company was renamed the NASDAQ OMX Group upon completion of the deal on February 27, 2008.

OMX exchanges
Copenhagen Stock Exchange
Stockholm Stock Exchange
Helsinki Stock Exchange
Tallinn Stock Exchange
Riga Stock Exchange
Vilnius Stock Exchange
Iceland Stock Exchange
Armenian Stock Exchange (completed November 2007)[18]
Oslo Stock Exchange (10% stake)

Divisions
The company’s stock market activities are categorized into three divisions:

1. Nordic Market (Copenhagen, Stockholm, Helsinki, Iceland)
2. Baltic Market (Tallinn, Riga, Vilnius)
3. First North (alternative exchange)