Director/PDMR Shareholding

GlaxoSmithKline plc

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

In accordance with DTR 3.1.4 R(1)(c) I give details of changes in the interests of Dr P J T Vallance, a Person Discharging Managerial Responsibilities, in the Ordinary Shares of GlaxoSmithKline (GSK). GSK was advised on 11 August 2014 that Dr P J T Vallance's spouse, Dr S Dexter, purchased 7,225 Ordinary Shares on 11 August 2014 at a price of 1377.00 pence per Ordinary Share.

V A Whyte

Company Secretary

11 August 2014