X0306 4 2017-08-18 0001170534 MITEL NETWORKS CORP MITL 0001692516 Brinton Jon 350 LEGGET DRIVE OTTAWA, A6 K2K 2W7 1 See Remarks Options (Common Shares) 2017-08-18 4 J 0 7000 D 2017-07-15 Common Shares 7000 0 D Represents 7,000 unexercised and out-of-the-money stock options previously granted to Mr. Brinton that expired on August 18, 2017. The expiry date for such options had been extended in accordance with the 2006 Equity Incentive Plan, to August 18, 2017 as a result of the original expiry date of July 15, 2017 coinciding with a black-out period for the Issuer. 7,000 stock options to purchase Common Shares of the Company were granted to Mr. Brinton on July 15, 2010. 437 options vested on October 15, 2010 and vested in approximately equal installments every three months thereafter until July 15, 2014. /s/ Jon Brinton 2017-08-22