Director/PDMR Shareholding

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

I give below details of changes in the interests of a Director and his Connected Person in the Ordinary Shares of GlaxoSmithKline plc.

Mr A P Witty The transfer by way of gift of 118,000 Ordinary shares in GlaxoSmithKline plc to his wife on 31 March 2011.

The Company was advised of this transaction on 31 March 2011.

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

V A Whyte

Company Secretary

31 March 2011