FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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OMB Number: 3235-0287
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Hiscock Gregory James 		2. Issuer Name and Ticker or Trading Symbol

MITEL NETWORKS CORP [ MITL ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
See Remarks
(Last)          (First)          (Middle)

350 LEGGET DRIVE, OTTAWA, A6 		3. Date of Earliest Transaction (MM/DD/YYYY)

8/18/2017
(Street)

K2K 2W7
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Options (Common Shares)     (1) 8/18/2017     J   (1)       15000      (2) 7/15/2017   Common Shares   15000     (1) 0   D    
Options (Common Shares)     (3) 8/18/2017     J   (3)       10000      (4) 7/15/2017   Common Shares   10000     (3) 0   D    

Explanation of Responses:
(1)  Represents 15,000 unexercised and out-of-the-money stock options previously granted to Mr. Hiscock 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.
(2)  15,000 stock options to purchase Common Shares of the Company were granted to Mr. Hiscock on July 15, 2010. 937 options vested on October 15, 2010 and vested in approximately equal installments every three months thereafter until July 15, 2014.
(3)  Represents 10,000 unexercised and out-of-the-money stock options previously granted to Mr. Hiscock 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.
(4)  10,000 stock options to purchase Common Shares of the Company were granted to Mr. Hiscock on July 15, 2010. 625 options vested on October 15, 2010 and vested in equal installments every three months thereafter until July 15, 2014.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Hiscock Gregory James
350 LEGGET DRIVE
OTTAWA, A6
K2K 2W7

See Remarks

Signatures
/s/ Gregory James Hiscock 8/22/2017
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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