Director/PDMR Shareholding

GlaxoSmithKline PLC
02 April 2008





   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 2008, 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 2008 to 31 March 2008:


Non Executive Director                     Ordinary Shares        American Depository Shares
                                                                            (ADSs)
Sir Christopher Gent                           2,694.47
Prof Sir Roy Anderson                           761.48
Dr Stephanie Burns                                                          321.03
Mr Lawrence Culp                                                            642.07
Sir Crispin Davis                              2,343.02
Sir Deryck Maughan                                                          642.07
Dr Daniel Podolsky                                                          481.55
Sir Ian Prosser                                1522.96
Dr Ronaldo Schmitz                              937.21
Mr Tom de Swaan                                 761.48
Sir Robert Wilson                               702.91



The Company and the Non-Executive Directors were informed of these allocations
on 1 April 2008.



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



S M Bicknell
Company Secretary
2 April 2008


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