Exhibit 4.1

NUMBER

QUINTILES®

QUINTILES TRANSNATIONAL HOLDINGS INC.

INCORPORATED UNDER THE LAWS OF THE STATE OF NORTH CAROLINA

SHARES

COMMON STOCK

CUSIP 74876Y 10 1

SEE REVERSE FOR CERTAIN DEFINITIONS

This Certifies That is the owner of

FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK, PAR VALUE OF $.01 PER SHARE, OF

QUINTILES TRANSNATIONAL HOLDINGS INC.

transferable only on the books of the Corporation by the holder hereof in person or by duly authorized attorney upon surrender of this Certificate properly endorsed. This Certificate and the shares represented hereby are issued under and subject to the laws of the State of North Carolina and to the Amended and Restated Articles of Incorporation and Bylaws of the Corporation, all as in effect from time to time. This Certificate is not valid until countersigned and registered by the Transfer Agent and Registrar.

WITNESS the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers.

Dated:

SECRETARY

CHIEF EXECUTIVE OFFICER

COUNTERSIGNED AND REGISTERED:

AMERICAN STOCK TRANSFER & TRUST COMPANY, LLC

(Brooklyn, NY) Transfer Agent

And Registrar

By

Authorized Signature

The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations:

TEN COM– as tenants in common UNIF GIFT MIN ACT–Custodian

(Cust)

TEN ENT

(Minor)

– as tenants by the entireties

JT TEN

– as joint tenants with right of

under Uniform Gifts to Minors

of survivorship and not as tenants

Act

in common

(State)

Additional abbreviations may also be used though not in the above list.

For Value Received, hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE

(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

Shares of the common stock represented by the within Certificate, and do hereby irrevocably constitute and appoint

Attorney to transfer the said stock on the books of the within named Corporation with full power of substitution in the premises.

Dated,

THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH

NOTICE:

THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE, IN

EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT, OR

ANY CHANGE WHATEVER

SIGNATURE(S) GUARANTEED:

THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR

INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS

AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE

GUARANTEE MEDALLION PROGRAM), PURSUANT TO SEC RULE 17Ad-15.

THE ISSUER WILL FURNISH IN WRITING AND WITHOUT CHARGE TO EACH SHAREHOLDER WHO SO REQUESTS THE DESIGNATIONS, RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS APPLICABLE TO EACH CLASS OF SHARES AND THE VARIATIONS IN RIGHTS, PREFERENCES AND LIMITATIONS DETERMINED FOR EACH SERIES (AND THE AUTHORITY OF THE BOARD OF DIRECTORS TO DETERMINE VARIATIONS FOR FUTURE SERIES).