Marshall Wace, Llp

Q1 2015 13F Holdings Report, Stock Holdings

Signature - Title: Sven Jones - Operations Control
Location: London, United Kingdom
Holdings as of: March 31, 2015
Value $: $7.68B
Num holdings: 778
Date filed: 5/11/2015, 06:27 AM
Form type: 13F-HR
Description: All US holdings of this investor are reported in this report. Top holdings included ZTS, B108PS, TMUS, EPI, and AZO.
Previous filing: Q4 2014 - Feb 17, 2015
Next filing: Q2 2015 - Aug 14, 2015
SEC: View on sec.gov

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

Filing 2015 Q1 compared to 2014 Q4 by default.

Compare Q1 2015 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
Sven Jones	Operations Control	London, United Kingdom	5/11/2015

Other Included Managers (2):

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