X0306 4 2018-03-01 0001170534 MITEL NETWORKS CORP MITL 0001617508 Spooner Steven Edward 350 LEGGET DRIVE OTTAWA, A6 K2K 2W7 1 Chief Financial Officer Common Shares 2018-03-01 4 M 0 16750 A 203104 D Common Shares 2018-03-02 4 S 0 7913 8.0278 D 195191 D Common Shares 14900 I Held By Registered Retirement Savings Plan For Steven Edward Spooner Common Shares 5100 I Held By The Spooner Children Trust Restricted Stock Units 0 2018-03-01 4 M 0 16750 D 2024-03-01 Common Shares 16750 50250 D Represents 67,000 Common Shares underlying 67,000 RSUs granted on March 1, 2017. These RSUs vest in four equal installments annually starting March 1, 2018. Represents the automatic withholding of Common Shares to satisfy tax withholding obligations in connection with the vesting of RSUs. 5,100 common shares ("Common Shares") of Mitel Networks Corporation (the "Company") are held by the Spooner Children Trust, of which Mr. Spooner is one of three trustees, for the benefit of the children of Mr. Spooner. Mr. Spooner disclaims beneficial ownership of the Common Shares held for the benefit of his children and this report shall not be deemed an admission that Mr. Spooner is a beneficial owner of such shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. /s/ Steven Edward Spooner 2018-03-05