This marks an increase of over 1.88 million shares since the end of 2016 when they owned 10.79 million shares. The filing was made due to activity on February 17th.
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Per Google Finance, Zayo Group is "a provider of bandwidth infrastructure in the United States, Canada and Europe. The Company operates in five segments, including Dark Fiber Solutions, Network Connectivity, Colocation and Cloud Infrastructure, Zayo Canada and Other. Its key products include leased dark fiber, fiber to cellular towers and small cell sites, wavelength connections, Ethernet, Internet Protocol (IP) connectivity and cloud services. Its products and services enable high-bandwidth applications, such as cloud-based computing, video, mobile, social media and machine-to-machine connectivity. As of June 30, 2016 the Company owned fiber networks in 300 metro markets, including metro areas, such as New York, Chicago, San Francisco, Paris, and London, as well as smaller metro areas, such as Allentown, Pennsylvania, Fargo, North Dakota, and Spokane, Washington. The Company also provides its network-neutral colocation and interconnection services utilizing its own data centers."