Director/PDMR Shareholding

 Notification of Transactions of Directors, Persons Discharging Managerial Responsibility or Connected Persons

I give below details of a change in the interests of a Person Discharging Managerial Responsibility in the ADR Shares of GlaxoSmithKline plc on 25 August 2011:

Mr W C Louv The sale of 1,722 ADR shares in GlaxoSmithKline plc for $42.71 per share.

The Company was advised of this transaction on 25 August 2011.

This notification relates to transactions notified in accordance with Disclosure Rule 3.1.4R(1)(a).

V A Whyte

Company Secretary

26 August 2011