Director/PDMR Shareholding

GlaxoSmithKline PLC
09 May 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 9 May 2007 of:

(i)                  An increase in the notional allocation of Ordinary Share
ADRs on 3 May 2007 at a price of $57.44 per share:-

Dr JP Garnier                                                          59
Dr M M Slaoui                                                          1
Mrs C Bruck Slaoui                                                     1
Dr R G Greig                                                           72
Mr W C Louv                                                            5
Dr D Pulman                                                            12
Mr D M Stout                                                           29
Mr C Viehbacher                                                        4



The Administrators of the Plan further notified GlaxoSmithKline plc and the
under-mentioned persons on 9 May 2007 of

(i)                  An increase in the notional allocation of Ordinary Share
ADRs on 4 May 2007 at a price of $57.90 per share:-


Mrs C Bruck Slaoui                                                     3
Dr R G Greig                                                           1




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



9 May 2007


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