CME Data Center With ‘Cooling Issue’ Was Flagship Site in Aurora

A CyrusOne data center in Aurora, Illinois on November 28. — A CyrusOne data center in Aurora, Illinois on November 28.
Photographer: Jim Vondruska/Bloomberg

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By Bernard Goyder

November 28, 2025 at 3:01 PM UTC

The CME Group data center that malfunctioned and caused a wave of disruption across global markets is located in Aurora, Illinois, the exchange has confirmed.

Read more: Frustration, Confusion Ripple Across Markets on CME Outage