X0306 4 2019-09-04 0 0001608249 Zayo Group Holdings, Inc. ZAYO 0001622435 Caruso Daniel 1821 30TH STREET, UNIT A BOULDER CO 80301 1 1 0 0 CEO Common Stock 2019-09-04 4 S 0 8141 33.75 D 372406 D Common Stock 2019-09-04 4 S 0 1741859 33.75 D 5013660 I By DPC Papa Bear Enterprises, LLC Common Stock 2019-09-05 4 S 0 500000 33.75 D 4513660 I By DPC Papa Bear Enterprises, LLC Common Stock 4438 I By Bear Investments, LLLP Common Stock 8066 I By Bear Equity, LLC Common Stock 127886 I By Daniel P. Caruso Development Fund The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.75 to $33.75. The reporting person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in in this footnote The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.70 to $33.80. The reporting person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in in this footnote. The reporting person disclaims beneficial ownership of the shares held by DPC Papa Bear Enterprises, LLC, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $37.70 to $37.80. The reporting person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in in this footnote The reporting person disclaims beneficial ownership of the shares held by Daniel P. Caruso Development Fund, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. /s/ Shira Cooks, as attorney-in-fact 2019-09-06