ZAYO SELECTED BY LARGE PACIFIC NORTHWEST HEALTH CARE PROVIDER

Customer to leverage dark fiber to implement next-generation healthcare technologies

BOULDER, Colo. – March 24, 2016 – Zayo Group Holdings, Inc. (NYSE: ZAYO), has been selected by a large health care provider in the Pacific Northwest for metro dark fiber services. Zayo’s dark fiber will securely connect two primary hospitals and a large medical clinic, enabling the organization to leverage its new electronic health record (EHR) platform. The solution largely leverages existing network acquired through multiple acquisitions and built by prior success-based capital projects.

The digitization of healthcare, including EHR, is generating heavy demand for high-bandwidth solutions, including dark fiber. Zayo is well positioned to benefit from this growth by providing high-performance, secure connectivity and infrastructure over its expansive and unique fiber assets.

“Health care facilities are increasingly turning to dark fiber as it provides the performance and security they require for the types of information they process and transmit,” said Randy Dunbar, senior vice president of Metro Dark Fiber at Zayo. “We expect to achieve a substantial return on the project, which demonstrates our continued ability to leverage existing infrastructure.”

About Zayo Group

Zayo Group Holdings, Inc. (NYSE: ZAYO) provides communications infrastructure services, including fiber and bandwidth connectivity, colocation and cloud services to the world’s leading businesses. Customers include wireless and wireline carriers, media and content companies and finance, healthcare and other large enterprises. Zayo’s 110,000-mile network in North America and Europe includes extensive metro connectivity to thousands of buildings and data centers. In addition to high-capacity dark fiber, wavelength, Ethernet and other connectivity solutions, Zayo offers colocation and cloud services in its carrier-neutral data centers. Zayo provides clients with flexible, customized solutions and self-service through Tranzact, an innovative online platform for managing and purchasing bandwidth and services. For more information, visit zayo.com.

Forward Looking Statements

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