Director/PDMR Shareholding

GlaxoSmithKline PLC
16 February 2007



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


The Administrators of the GlaxoSmithKline Performance Share Plan notified the
Company and the under-mentioned persons on 16 February 2007 of an increase in
their interests in Ordinary Share ADRs at a price of $54.67 per ADR following
the re-investment of the dividend paid to shareholders on 4 January 2007.


Dr JP Garnier                                                      604.15
Mr D Phelan                                                        129.46
Mr D Stout                                                         62.70



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


S M Bicknell
Company Secretary

16 February 2007


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