Director/PDMR Shareholding

GlaxoSmithKline PLC
03 April 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 31 March 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 January 2007 to 31 March 2007:


     Non Executive Director         Ordinary Shares   American Depository Shares
                                                               (ADSs)
     Sir Christopher Gent               2,071.33
     Dr Stephanie Burns                                       133.01
     Mr Lawrence Culp                                         498.80
     Sir Crispin Davis                  1,440.92
     Sir Deryck Maughan                                       498.80
     Dr Daniel Podolsky                                       374.10
     Sir Ian Prosser                     990.63
     Dr Ronaldo Schmitz                  576.37
     Mr Tom de Swaan                     495.32
     Sir Robert Wilson                   450.29

The Company and the Non-Executive Directors were informed of these allocations
on 2 April 2007.

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

S M Bicknell
Company Secretary
3 April 2007


                      This information is provided by RNS
            The company news service from the London Stock Exchange