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Zayo to Host Fourth Quarter Fiscal Year 2016 Conference Call August 25, 2016

BOULDER, Colo.August 2, 2016 – Zayo Group Holdings (“Zayo” or the “Company”) (NYSE: ZAYO) invites you to listen to its earnings call for the fourth quarter fiscal year 2016 ended June 30, 2016 on Thursday, August 25, 2016.

When: Thursday, August 25, 2016 @ 3:00 p.m. MDT/5:00 p.m. EDT

Click this link to register and view the Webcast: https://cc.readytalk.com/r/ic1nh315rcwc&eom

Dial-in information for the audio portion of the Webcast: U.S. & Canada Toll-Free: 888-273-1350, (ID: 21815967)

During the call, the Company will review an earnings presentation that summarizes the financial, operational and commercial highlights of the quarter. This presentation and the earnings supplement will be available after the call through Zayo’s website at: http://www.zayo.com/investors/earnings-releases.

If you have any questions, please contact Zayo Investor Relations at 720.306.7556 or IR@zayo.com.

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 112,000-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.