Browse Market Structure

OMX: A Key Player in Stock Exchanges

OMX is a company that owns and operates stock exchanges in Scandinavia, the Baltic States, and Armenia; and markets advanced electronic trading systems for derivatives products. OMX became a wholly owned subsidiary of NASDAQ in 2008.

Key Events in OMX History

  • 1998: Acquisition of the Stockholm Stock Exchange
  • 2003: Acquisition of the Helsinki Exchange
  • 2005: Acquisition of the Copenhagen Exchange
  • 2008: Became a wholly owned subsidiary of NASDAQ

Types/Categories of Services

  • Stock Exchange Operations:

    • Stockholm Stock Exchange (OMX Stockholm)
    • Helsinki Exchange (OMX Helsinki)
    • Copenhagen Exchange (OMX Copenhagen)
    • Baltic States Exchanges
    • Armenian Exchange
  • Electronic Trading Systems:

    • Derivatives Trading Systems: Used globally in many stock exchanges
    • Equity Trading Platforms: Advanced systems for efficient stock trading

Acquisitions

OMX’s strategy involved the acquisition of key exchanges, which allowed it to build a unified, regional network of trading platforms:

  • Stockholm Stock Exchange: OMX acquired this exchange to consolidate its influence in Scandinavia.
  • Helsinki Exchange: This acquisition brought OMX’s presence into Finland, expanding its regional network.
  • Copenhagen Exchange: Acquiring the Danish stock exchange further strengthened its Scandinavian network.

Subsidiary of NASDAQ

OMX’s acquisition by NASDAQ in 2008 integrated its advanced trading systems with NASDAQ’s robust global operations, creating NASDAQ OMX.

Importance

OMX played a crucial role in the modernization of trading systems and enhanced the efficiency and connectivity of stock exchanges across Scandinavia and the Baltic region. By integrating advanced electronic trading platforms, OMX has made significant contributions to the global trading infrastructure.

FAQs

What does OMX stand for? OMX was initially known as the OM Group before rebranding.

Why did NASDAQ acquire OMX? To integrate OMX’s advanced trading systems with NASDAQ’s global operations, creating a more robust trading platform.

What are the key stock exchanges under OMX? Stockholm, Helsinki, and Copenhagen stock exchanges are key components.

Revised on Monday, May 18, 2026