Director/PDMR Shareholding

GlaxoSmithKline PLC
25 April 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 24 April 2007 of a correction to an
increase in their interests in Ordinary Share ADRs at a price of $56.84 per ADR
following the re-investment of the dividend paid to shareholders on 12 April
2007.  The numbers of shares re-invested were as follows:

Dr JP Garnier                                              717.52

Mr D J Phelan                                              153.75

Mr D M Stout                                               74.46


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


S M Bicknell
Company Secretary

25 April 2007



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