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 American Depositary Shares (ADSs) of GlaxoSmithKline plc on 28 September 2012:

Mr W C Louv The sale of 9,964 ADSs in GlaxoSmithKline plc at a price of $46.24 per ADS.

The Company was advised of this transaction on 1 October 2012.

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

V A Whyte

Company Secretary

1 October 2012