BOULDER, Colo. – 
      Zayo Group Holdings, Inc. (NYSE: ZAYO) invites you to listen to its
      earnings call for the third quarter fiscal year 2018 ended March 31,
      2018 on Thursday, May 3, 2018.
    
When: Thursday, May 3, 2018 at 3:00 p.m. MDT/5:00 p.m. EDT
Click this link to register and view the Webcast: https://services.choruscall.com/links/zayo180504nELjj8D2.html
      Dial-in information for the audio portion of the Webcast; please request
      to join the Zayo Group call:
U.S. Listeners: 866-737-5498
International
      Listeners: 412-858-4607
    
      During the call, the Company will review an earnings presentation that
      summarizes the financial, operational and commercial highlights of the
      quarter. This earnings presentation, a live webcast of the conference
      call, and a supplemental earnings presentation will be made available
      through the Investor Relations section of the Company’s website at investors.zayo.com.
    
      If you have any questions, please contact Zayo Investor Relations at
      720-306-7556 or IR@www.zayo.com.
    
About Zayo Group
      Zayo Group Holdings, Inc. (NYSE: ZAYO) provides communications
      infrastructure solutions, including fiber and bandwidth connectivity,
      colocation and cloud infrastructure 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
      127,000-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 infrastructure
      in its carrier-neutral data centers. Zayo provides users with flexible,
      customized solutions and self-service through Tranzact, an innovative
      online platform for managing and purchasing bandwidth. For more
      information, visit zayo.com.
    
View source version on businesswire.com: https://www.businesswire.com/news/home/20180404006127/en/
Zayo Group Holdings, Inc.
Media:
Shannon Paulk,
      303-577-5897
Corporate Communications
press@www.zayo.com
or
Investors:
Brad
      Korch, 720-306-7556
Investor Relations
IR@www.zayo.com
