Director/PDMR Shareholding

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

The Administrators of the GlaxoSmithKline Annual Investment Plan notified the Company and the under mentioned person on 17 January 2011 of an increase in their interests in Ordinary shares, purchased at a price of £12.30 per share on 12 January 2011, following the re-investment of the dividend paid to shareholders on 6 January 2011 -

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

V A Whyte

Company Secretary

17 January 2011