Document:

SEVENTH
SUPPLEMENTAL INDENTURE

This SEVENTH SUPPLEMENTAL INDENTURE (the
“Supplemental Indenture”) dated as of July 20, 2012 among OMNICOM GROUP INC., a New York corporation (the “Company”),
OMNICOM CAPITAL INC., a Connecticut corporation (“OCI” and, together with the Company, the “Issuers”),
and Deutsche Bank Trust Company Americas, as trustee under the indenture referred to below (the “Trustee”).

W I T N E S S E T H:

WHEREAS, the Issuers, Omnicom Finance
Inc., a Delaware corporation (“OFI”), and the Trustee have heretofore executed and delivered to the Trustee
an Indenture, dated as of June 10, 2003, as amended by the First Supplemental Indenture, dated as of November 5, 2003 (the “First
Supplemental Indenture”), the Second Supplemental Indenture, dated as of November 4, 2004, the Third Supplemental Indenture,
dated as of November 10, 2004, the Fourth Supplemental Indenture, dated as of June 30, 2006, the Fifth Supplemental Indenture,
dated as of June 8, 2010, and the Sixth Supplemental Indenture, dated as of June 21, 2010 (as so amended, the “Indenture”),
relating to the issuance of an aggregate principal amount of $600,000,000 of Zero Coupon Zero Yield Convertible Notes due 2033
(the “2033 Securities”), $84,000 of which are outstanding as 2033 Securities on the date hereof and $406,622,000
of which are outstanding as Zero Coupon Zero Yield Convertible Notes due 2038 (the “2038 Securities” and, together
with the 2033 Securities, the “Securities”) on the date hereof;

WHEREAS, as permitted by the Indenture, including
the provisions of Article V thereof, OFI has been merged with and into the Company;

 

WHEREAS, the Issuers desire to enter into this
Supplemental Indenture pursuant to the Indenture to supplement the Indenture to evidence that the Company shall succeed to, and
be substituted for, and may exercise every right and power of OFI;

 

NOW THEREFORE, for good and valuable consideration,
the receipt of which is hereby acknowledged, the Issuers and the Trustee mutually covenant and agree for the equal and ratable
benefit of the holders of the Securities as follows:

1.                 
Definitions. All capitalized terms used but not defined herein shall have the meanings given to such terms set forth
in the Indenture.

2.                 
Merger; Discharge. The Company shall succeed to, and be substituted for, and may exercise every right and power of
OFI, and consequently, OFI is hereby discharged and released from any obligations under the Indenture.

3.                 
Separability Clause. In case any provision in this Supplemental Indenture shall be invalid, illegal or unenforceable,
the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

4.                 
Ratification of Indenture; Supplemental Indenture Part of Indenture. Except as expressly amended hereby, the Indenture
is in all respects ratified and confirmed and all the

    	 

    	 	 

    
terms, conditions and provisions thereof shall remain in full force and effect.
In the event of a conflict between the terms and conditions of the Indenture and the terms and conditions of this Supplemental
Indenture, then the terms and conditions of this Supplemental Indenture shall prevail. This Supplemental Indenture shall form a
part of the Indenture for all purposes, and every holder of Securities heretofore or hereafter authenticated and delivered shall
be bound hereby.

5.                 
Trust Indenture Acts Controls. If any provision of this Supplemental Indenture limits, qualifies or conflicts with
any provision of the Trust Indenture Act of 1939, as amended (“TIA”), that is required under the TIA to be part
of and govern any provision of this Supplemental Indenture, the provision of the TIA shall control. If any provision of this Supplemental
Indenture modifies or excludes any provisions of the TIA that may be so modified or excluded, the provisions of the TIA shall be
deemed to apply to the Indenture as so modified or to be excluded by this Supplemental Indenture, as the case may be.

6.                 
Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE
STATE OF NEW YORK, AS APPLIED TO CONTRACTS MADE AND PERFORMED WITHIN THE STATE OF NEW YORK WITHOUT GIVING EFFECT TO THE PRINCIPLES
OF CONFLICTS OF LAW.

7.                 
Trustee Makes No Representation. The statements herein, except the Trustee's certificates of authentication, are
deemed to be those of the Company or OCI, as applicable, and not of the Trustee. The Trustee makes no representation as to the
validity or sufficiency of this Supplemental Indenture.

8.                 
Multiple Originals. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall
be an original, but all of them together represent the same agreement. One signed copy is enough to prove this Supplemental Indenture.

9.                 
Effect of Headings. The Section headings herein are for convenience only and shall not effect the construction thereof.

10.             
Notices. Any request, demand, authorization, notice, waiver, consent or communication to any of the parties shall
be made as set forth in Section 12.02 of the Indenture.

11.             
Successors. All agreements of each of the Company and OCI in respect of this Supplemental Indenture shall bind its
successor. All agreements of the Trustee in this Indenture shall bind its successor.

    	 

    	 	 

    

IN WITNESS
WHEREOF, this Supplemental Indenture has been duly executed by the Company, OCI and the Trustee as of the date first written above.

	Omnicom
    Group Inc.
	By:	 /s/
    Randall J. Weisenburger
	 	Name:	Randall J. Weisenburger
	 	Title:	Executive Vice President 

and Chief Financial Officer

  

  

	Omnicom
    CAPITAL Inc.
	By:	 /s/
    Michael J. O’Brien
	 	Name:	Michael J. O’Brien
	 	Title:	Secretary

  

    	 

    	 

    

	Deutsche
    Bank Trust Company 

    Americas, as Trustee
	By:	/s/ Christina Van Ryzin
	 	Name:	Christina Van Ryzin
	 	Title:	Vice President
	By:	/s/ Kisha A. Holder
	 	Name:	Kisha A. Holder
	 	Title:	Vice President

  

    	 

    	 

    

IN WITNESS
WHEREOF, this Supplemental Indenture has been duly executed by the Company, as successor to Omnicom Finance Inc., as
of the date first written above.

	Omnicom
    Group Inc.
	By:	 /s/
    Randall J. Weisenburger
	 	Name:	Randall J. Weisenburger
	 	Title:	Executive Vice President 

and Chief Financial OfficerOMNICOM GROUP INC.

OMNICOM CAPITAL
INC.

as Issuers

SECOND SUPPLEMENTAL INDENTURE

Dated as of July 20, 2012

DEUTSCHE BANK TRUST COMPANY AMERICAS

as Trustee

Senior Debt Securities

    	 

    	 	 

    

Second Supplemental Indenture dated as of July
20, 2012 (the “Supplemental Indenture”) among Omnicom Group Inc., a New York corporation (the “Company”),
Omnicom Capital Inc., a Connecticut corporation (“OCI” and, together with the Company, collectively referred
to as the “Issuers,” and each, individually, an “Issuer”), and Deutsche Bank Trust Company
Americas, a New York banking corporation, as Trustee (the “Trustee”).

 

W I T N E S S E T H:

 

WHEREAS, the
Issuers, Omnicom Finance Inc., a Delaware corporation (“OFI”), and the Trustee executed and delivered an indenture
dated as of March 29, 2006 (the “Indenture”) to provide for the issuance by the Issuers and OFI from time to
time of Securities to be issued in one or more series as provided in the Indenture;

 

WHEREAS, on March 29, 2006, the Issuers, OFI
and the Trustee entered into the First Supplemental Indenture to the Indenture (the “First Supplemental Indenture”),
pursuant to which the Issuers and OFI issued $1,000,000,000 aggregate principal amount of 5.90% Senior Notes due 2016;

 

WHEREAS, as permitted by the Indenture, including
the provisions of Article V thereof, OFI has been merged with and into the Company;

 

WHEREAS, the Issuers desire to enter into this
Supplemental Indenture pursuant to the Indenture to supplement the Indenture to evidence that the Company shall succeed to, and
be substituted for, and may exercise every right and power of OFI; and

 

        NOW, THEREFORE,
THIS SUPPLEMENTAL INDENTURE WITNESSETH, that, for and in consideration of the above premises, it is mutually covenanted and agreed,
for the equal and proportionate benefit of all Holders of the Securities, as follows:

 

ARTICLE ONE

DEFINITIONS

 

Section 1.1 Relation to Base Indenture.   

 

This Supplemental Indenture constitutes an integral
part of the Indenture. In the event of inconsistencies between the Indenture and this Supplemental Indenture, the terms hereof
shall govern.

 

Section 1.2 Definitions.

 

All of the terms used in this Supplemental Indenture which
are defined in the Indenture shall have the meanings specified in the Indenture, unless otherwise provided herein or unless the
context otherwise requires.

 

    	1

    	 	 

    

ARTICLE TWO

MERGER; DISCHARGE

 

Section 2.1. Merger and Discharge.

 

The Company shall succeed to, and be substituted for, and may
exercise every right and power of OFI, and consequently, OFI is hereby discharged and released from any obligations under the Indenture.

 

ARTICLE THREE

LIABILITY OF TRUSTEE

 

Section 3.1 Trustee Not Responsible for Recitals.

 

The Trustee shall not be responsible in any
matter whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals
contained herein, all of which are made solely by the Issuers.

 

ARTICLE FOUR

MISCELLANEOUS

Section 4.1. Ratification and Effect.

 

        Except as hereby
expressly amended, the Indenture is in all respects ratified and confirmed and all the terms, provisions and conditions thereof
shall be and remain in full force and effect.

 

        Upon and after
the execution of this Supplemental Indenture, each reference in the Indenture to “this Indenture,” “hereunder,”
“hereof” or words of like import referring to the Indenture shall mean and be a reference to the Indenture as modified
hereby.

 

Section 4.2 Governing Law.

 

        THIS SUPPLEMENTAL
INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE AND TO BE PERFORMED
IN SUCH STATE, WITHOUT REGARD TO THE CONFLICT OF LAWS PROVISIONS THEREOF.

 

Section 4.3 Counterpart Originals.

 

        This Supplemental
Indenture may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of which when
so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement.

 

Section 4.4 Effect of Headings.    

 

The headings of the Articles and Sections of
this Supplemental Indenture have been inserted for convenience of reference only, are not to be considered a part hereof, and shall
in no way modify or restrict any of the terms or provisions hereof.

 

    	2

    	 	 

    
Section 4.5.Severability.

 

In case any provision in this Supplemental Indenture
or in the Securities shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions
shall not in any way be affected or impaired thereby.

 

Section 4.6. Ratification of Indenture; Supplemental
Indenture Part of Indenture.

 

Except as expressly amended hereby, the Indenture
is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect.
This Supplemental Indenture shall form a part of the Indenture for all purposes, and every holder of Securities heretofore or hereafter
authenticated and delivered shall be bound hereby.

 

Section 4.7. Trust Indenture Acts Controls.

 

If any provision of this Supplemental Indenture
limits, qualifies or conflicts with any provision of the Trust Indenture Act of 1939, as amended (the “TIA”),
that is required under the TIA to be part of and govern any provision of this Supplemental Indenture, the provision of the TIA
shall control. If any provision of this Supplemental Indenture modifies or excludes any provisions of the TIA that may be so modified
or excluded, the provisions of the TIA shall be deemed to apply to the Indenture as so modified or to be excluded by this Supplemental
Indenture, as the case may be.

 

(Signatures on following
page)

 

    	3

    	 	 

    

IN WITNESS
WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the day and year first
above written.

	Omnicom
    Group Inc.
	By:	 /s/
    Randall J. Weisenburger
	 	Name:	Randall J. Weisenburger
	 	Title:	Executive Vice President
and 

Chief Financial Officer

  

  

	Omnicom
    CAPITAL Inc.
	By:	 /s/
Eric Huttner
	 	Name:	Eric Huttner
	 	Title:	
Executive Vice President

  

    	 

    	 

    

	Omnicom
    Group Inc., as successor to 

Omnicom Finance Inc.
	By:	 /s/
    Randall J. Weisenburger
	 	Name:	Randall J. Weisenburger
	 	Title:	Executive Vice President and

Chief Financial Officer

  

  

    	 

    	 

    

	Deutsche
    Bank Trust Company 

    Americas, as Trustee
	By:	/s/ Christina Van Ryzin
	 	Name:	Christina Van Ryzin
	 	Title:	Vice President
	By:	/s/ Kisha A. Holder
	 	Name:	Kisha A. Holder
	 	Title:	Vice President

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