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Zayo Announces $500 Million Share Repurchase Program

Press Release

BOULDER, Colo. –
Zayo Group Holdings, Inc. (NYSE: ZAYO) announced that the company’s
Board of Directors has authorized a six-month share repurchase program.

The share repurchase program authorizes up to $500 million for the
repurchase from time to time in open market transactions at prevailing
market prices, in privately negotiated transactions or by other means in
accordance with the federal securities laws. The actual timing, number
and value of shares repurchased under the program will be determined by
Zayo in its discretion and will depend on a number of factors, including
the market price of the common stock, general market and economic
conditions, applicable legal requirements and other factors.

For more information about Zayo’s network, visit 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
128,000-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.

Forward Looking Statements

This press release contains a number of forward-looking statements.
Words, and variations of words such as “believe,” “expect,” “plan,”
“continue,” “will,” “should,” and similar expressions are intended to
identify our forward-looking statements. No assurance can be given that
future results expressed or implied by the forward-looking statements
will be achieved and actual results may differ materially from those
contemplated by the forward-looking statements. These forward-looking
statements involve risks and uncertainties, many of which are beyond our
control. For additional information on these and other factors that
could affect our forward-looking statements, see our risk factors, as
they may be amended from time to time, set forth in our filings with the
SEC. We disclaim and do not undertake any obligation to update or revise
any forward-looking statement in this press release, except as required
by applicable law or regulation.

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Zayo Group Holdings, Inc.
Media:
Pat Nichols, Corporate
Communications
303-226-5955
press@www.zayo.com
or
Investors:
Brad
Korch, Investor Relations
720-306-7556
IR@www.zayo.com