Director/PDMR Shareholding

GlaxoSmithKline PLC
02 October 2007



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


I give below details of changes in the directors' interests in the Ordinary
shares and American Depository Shares (ADSs) of GlaxoSmithKline plc.

On 1 October 2007, the Company's Non-Executive Directors were provisionally
allocated the following awards over Ordinary shares and ADSs under the share
allocation arrangements for Non-Executive Directors for the period of service
from 1 July 2007 to 30 September 2007:


Non - Executive Director       Ordinary Shares      American Depository 
                                                                 Shares
                                                                 (ADSs)

Sir Christopher Gent                  2,196.33
Dr Stephanie Burns                                               341.37
Mr Lawrence Culp                                                 682.74
Sir Crispin Davis                     1,145.91
Sir Deryck Maughan                                               682.74
Dr Daniel Podolsky                                               469.38
Sir Ian Prosser                       859.43
Dr Ronaldo Schmitz                    458.37
Mr Tom de Swaan                       429.72
Sir Robert Wilson                     381.97


The Company and the Non-Executive Directors were informed of these allocations
on 1 October 2007.

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


S M Bicknell
Company Secretary
2 October 2007


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