Director/PDMR Shareholding

RNS Number : 3176Z

GlaxoSmithKline PLC

05 March 2013

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

Vesting of Conditional Share Awards under the

GlaxoSmithKline Performance Share Plan

This notification sets out the vesting of an award over Ordinary Shares in GlaxoSmithKline plc, made in 2010 to a connected person of a Person Discharging Managerial Responsibility (PDMR) under the GlaxoSmithKline 2009 Performance Share Plan. The award was subject to the achievement of a relevant business performance condition.

The three-year performance period for the award commenced on 1 January 2010 and ended on 31 December 2012.

The relevant business performance condition was not met and therefore the Remuneration Committee has confirmed that the award lapsed in full on 5 March 2013. The details are given in the table below:

Name of

PDMR

Name of Connected Person

Number of Ordinary Shares lapsed

Mr P Thomson

Mrs K Thomson

178

The Company and the above individuals were advised of these transactions on 5 March 2013.

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

V A Whyte

Company Secretary

5 March 2013