Director/PDMR Shareholding

GlaxoSmithKline PLC
16 January 2008



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


The Administrators of the Deferred Investment Award Plan notified the Company
and Mr Gray on 16 January 2008 of an increase in his interests in Ordinary
Shares at a price of £13.88 per share following the re-investment of the
dividend paid to shareholders on 10 January 2008.

Mr E J Gray                                                        200.06

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


S M Bicknell
Company Secretary

16 January 2008



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