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 * ROSENBERG GRAHAM LAWRENCE   2. Issuer Name and Ticker or Trading Symbol MDC PARTNERS INC [MDCA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Managing Director (Last) (First) (Middle) C/O MDC PARTNERS INC., 45 HAZELTON AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 09/04/2007 (Street) TORONTO ONTARIO CANADA, A6 M5R 2E3 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 Class A Subordinate Voting Shares (1)               39,057 (2) (3) D   Class A Shares               4,000 I Owned by spouse Class A Shares 09/04/2007   M   13,000 A $ 8.02 (4) 52,057 (2) (3) D   Class A Shares 09/04/2007   D   13,000 D $ 11.02 (4) 39,057 (2) (3) D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Stock Options (5)

$ 8.02 (4)

09/04/2007

M

13,000

11/14/2002

11/14/2007

Class A Shares

13,000

$ 0 (6)

0

D

Stock Options (7)

$ 8.4 (4)

07/31/2003

04/09/2012

Class A Shares

47,625

47,625

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ROSENBERG GRAHAM LAWRENCE C/O MDC PARTNERS INC. 45 HAZELTON AVENUE TORONTO ONTARIO CANADA, A6 M5R 2E3			Managing Director

Signatures

/s/ Graham L. Rosenberg		09/05/2007
**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)	Hereinafter, "Class A Shares".
(2)	Includes 17,500 Financial Performance-Based Restricted Stock Units (Class A Shares) (hereinafter, "FPB RSU's") of the Issuer awarded on February 28, 2006. These FPB RSU's may vest in 2008 and / or 2009 if the Issuer achieves specified financial performance targets in 2007 - 2008, and is dependent on continued employment. Such financial targets are set forth in a "Financial Performance-Based Restricted Stock Unit Agreement", a form of which was filed by the Issuer as an exhibit to a Form 8-K filed with the SEC on March 2, 2006.
(3)	Includes 19,643 FPB RSU's of the Issuer awarded March 20, 2007 which may vest in each of 2008, 2009 or 2010 if the Issuer achieves specified financial performance targets in 2007, 2008 and 2009, and is dependent on continued employment.
(4)	Canadian dollars.
(5)	Stock Options (previously granted on November 14, 2002) vest 1/5 on grant and 1/5 on each anniversary of the grant date, expiring five years from the grant date.
(6)	This transaction does not involve the sale or purchase of a derivative security, but rather the exercise of stock appreciation rights. As per instruction 4 of Form 4, this field has been left blank.
(7)	Stock Options (previously granted July 31, 2003) are deemed to have fully vested on the grant date.

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