CyrusOne Aurora I and Aurora II Data Centers Awarded Three Green Globes for Environmental Leadership

CyrusOne Inc. (NASDAQ: CONE), a premier global REIT, today announced the Green Building Initiative (GBI), following a detailed review process, has awarded the ranking of Three Green Globes^® for the Company's Chicago Aurora I and Aurora II Data Centers. The recognition for both data centers on the Aurora campus demonstrates CyrusOne's commitment to applying the best energy, water, and environmental efficiency practices.

Notable achievements from the Three Green Globes recognition include:

• Robust monitoring of mechanical and electrical systems

• Comprehensive facility energy management and sustainability policies implemented at both data centers

• Implementation of a comprehensive purchasing and waste policy that incorporates CyrusOne's sustainability goals

• Comprehensive green cleaning policy

• Comprehensive refrigerant management plan

"On behalf of our entire Aurora Campus team, CyrusOne is proud to accept this outstanding award from the Green Building Initiative. The awards for both data centers on our Aurora campus highlight our continued commitment to fulfilling our sustainability mission," said Kyle Myers, Senior Director of Environmental Health, Safety & Sustainability at CyrusOne. "We continue to strive towards implementing innovative solutions to help our customers reduce their environmental impact, today and in the future."

"GBI applauds CyrusOne's commitment to sustainability and the achievement of an impressive Three Green Globes rating. Data centers have unique complexities, especially with respect to energy consumption, and Aurora I and II serve as outstanding examples of integrated planning and execution," said Vicki Worden, GBI President & CEO. Worden added, "Green Globes flexibility features, cost-effectiveness and time to certification allow REITs to elevate and be recognized for their sustainability efforts across portfolios."

In October 2020, CyrusOne published its first sustainability report, highlighting progress toward its sustainability goals and the Company's emphasis on building data centers designed for a sustainable future. CyrusOne continues to make substantial progress on its goals and will be publishing its 2021 Sustainability Report later this year.

To learn more about CyrusOne, visit www.cyrusone.com.

About CyrusOne

CyrusOne (NASDAQ: CONE) is a premier global REIT specializing in design, construction and operation of more than 50 high-performance data centers worldwide. The company provides mission-critical facilities that ensure the continued operation of IT infrastructure for approximately 1,000 customers, including approximately 200 Fortune 1000 companies.

A leader in hybrid-cloud and multi-cloud deployments, CyrusOne offers colocation, hyperscale, and build-to-suit environments that help customers enhance the strategic connection of their essential data infrastructure and supporting achievement of sustainability goals. CyrusOne data centers offer world-class flexibility, enabling clients to modernize, simplify, and rapidly respond to changing demand. Combining exceptional financial strength with a broad global footprint, CyrusOne provides customers with long-term stability and strategic advantage at scale.

About Green Building Initiative

Green Building Initiative (GBI) is a nonprofit organization and American National Standards Institute (ANSI) Accredited Standards Developer dedicated to improving building performance and reducing climate impacts. Founded in 2004, the organization is the global provider of the Green Globes^® and federal Guiding Principles Compliance certification and assessment programs.