X0206 3 2016-12-20 0 0001170534 MITEL NETWORKS CORP MITL 0001273417 WILLIAMS DAVID M 350 LEGGET DRIVE OTTAWA A6 K2K 2W7 ONTARIO, CANADA 1 0 0 0 Common Shares 170000 D Options (Common Shares) 7.17 2017-03-04 2023-03-04 Common Shares 10000 D Options (Common Shares) 8.94 2015-12-31 2022-05-14 Common Shares 10000 D Options (Common Shares) 9.70 2015-03-05 2022-03-05 Common Shares 294 D Options (Common Shares) 9.96 2014-11-13 2021-11-13 Common Shares 4850 D Options (Common Shares) 9.96 2014-08-14 2021-08-14 Common Shares 4595 D Options (Common Shares) 10.83 2014-05-20 2021-05-20 Common Shares 9721 D Restricted Stock Units Common Shares 10000 D Represents 10,000 Common Shares underlying 10,000 Restricted Stock Units ("RSUs") granted to Mr. Williams on March 4, 2016. These RSUs will vest on February 28, 2017. /s/ David Michael Williams 2016-12-20