MARSHALL WACE, LLP

Q1 2014 13F Holdings Report, Stock Holdings

Signature - Title: Christopher Messiana - Head of Operations
Location: London, United Kingdom
Holdings as of: 31 Mar 2014
Value $: $5,498,409,000
Num holdings: 772
Filing time: 14 May 2014, 11:04:24 UTC
Form type: 13F-HR
Description: All US holdings of this investor are reported in this report. Top holdings included TMUS, ZTS, CMCSA, GOOGL, and ROK.
Next filing: Q2 2014 - 14 Aug 2014
SEC: View on sec.gov

Sym	Weight	Trade Impact	Company	Class	Share Change	Activity	Value Change $	Value $	* Price $	Shares	Principal

Compare Q1 2014 to

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.

Person Signing this Report on Behalf of Reporting Manager:

Name	Title	City, State	Date
Christopher Messiana	Head of Operations	Cos Cob, Connecticut	14 May 2014

Other Included Managers (2):

Num	Name	Location	File Number
1	Marshall Wace North America L.P.	New York, NY	028-11377
2	MARSHALL WACE ASIA Ltd	Central	028-14472