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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * WILLIAMS DAVID M   2. Issuer Name and Ticker or Trading Symbol MITEL NETWORKS CORP [MITL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 350 LEGGET DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 11/30/2018 (Street) OTTAWA, A6 K2K 2W7 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 Common Shares (1) (2) 11/30/2018   D   227,630 D $ 11.15 0 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction 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 (Month/Day/Year)

7. Title and Amount of Underlying Securities (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)

$ 10.83

11/30/2018

D

9,721

05/20/2014

05/20/2021

Common Shares

9,721

(3)

0

D

Options (Common Shares)

$ 9.96

11/30/2018

D

4,595

08/14/2014

08/14/2021

Common Shares

4,595

(3)

0

D

Options (Common Shares)

$ 9.96

11/30/2018

D

4,850

11/13/2014

11/13/2021

Common Shares

4,850

(3)

0

D

Options (Common Shares)

$ 9.7

11/30/2018

D

294

03/05/2015

03/05/2022

Common Shares

294

(3)

0

D

Options (Common Shares)

$ 8.94

11/30/2018

D

10,000

12/31/2015

05/14/2022

Common Shares

10,000

(3)

0

D

Options (Common Shares)

$ 7.17

11/30/2018

D

10,000

03/04/2017

03/04/2023

Common Shares

10,000

(3)

0

D

Restricted Stock Units

(4)

11/30/2018

D

14,500

12/31/2018

(4)

Common Shares

14,500

(4)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
WILLIAMS DAVID M 350 LEGGET DRIVE OTTAWA, A6 K2K 2W7	X

Signatures

/s/ David M Willliams		12/04/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	On November 30, 2018 (the "Closing Date"), MLN AcquisitionCo ULC (the "Purchaser") acquired all of the outstanding common shares of Mitel Networks Corporation (the "Issuer") under a plan of arrangement under the Canada Business Corporations Act (the "Plan of Arrangement"), and Issuer became a wholly owned subsidiary of the Purchaser, an entity currently owned and controlled by funds affiliated with Searchlight Capital Partners, L.P., a private equity investment group.
(2)	Pursuant to the Plan of Arrangement, each common share was transferred to the Purchaser in exchange for the right to receive US$11.15 in cash, without interest and less any applicable withholding taxes.
(3)	Pursuant to the Plan of Arrangement, options to purchase common shares (the "Options") were accelerated and all Options were cancelled in exchange for the right to receive an amount equal to the excess, if any, of US$11.15 over the exercise price of such option, less any applicable withholding taxes.
(4)	Represents 14,500 common shares underlying 14,500 restricted stock units. Pursuant to the Plan of Arrangement, each restricted share unit was cancelled in exchange for the right to receive US$11.15 in cash, less any applicable withholding taxes.

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