Director/PDMR Shareholding

GlaxoSmithKline PLC
07 August 2007



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


Following a re-valuation of the cash element of the notional investment held
within the US Retirement Savings Plan ("The Plan"), which is notionally held in
GSK Ordinary Share ADRs, the Administrators of the Plan notified GlaxoSmithKline
plc and the under-mentioned persons on 07 August 2007 of:
          
     (i)  An increase in the notional allocation of Ordinary Share ADRs on 02 
          August 2007 at a price of $51.86 per share:-

Mrs C Bruck Slaoui                                                     1
Mr W C Louv                                                            6
Dr M M Slaoui                                                          2
Mr D M Stout                                                           39
Dr D Pulman                                                            16
Dr R G Greig                                                           81
Dr J P Garnier                                                         75
Mr C Viehbacher                                                        6


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

07 August 2007


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