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 Person Discharging Managerial Responsibility and her Connected Person in the Ordinary Shares of GlaxoSmithKline plc.

Mrs V A Whyte The transfer of 799 Ordinary shares in GlaxoSmithKline plc to Mr I W Whyte on 5 May 2011.

The Company was advised of this transaction on 5 May 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

6 May 2011