Transaction in Own Shares

REPURCHASE OF SHARES IN ASTRAZENECA PLC

AstraZeneca PLC announced that on 1 December 2011, it purchased for cancellation 809,923 ordinary shares of AstraZeneca PLC at a price of 2923 pence per share.

Some of these shares were purchased under the terms of the previously announced irrevocable, non-discretionary share repurchase programme for the period 3 October 2011 to 16 December 2011.

Upon the cancellation of these shares, the number of shares in issue will be 1,302,258,397.

A C N Kemp

Company Secretary

2 December 2011