Director/PDMR Shareholding

GlaxoSmithKline PLC
13 March 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 13 March 2007 of:

(i)  An increase in the notional allocation of Ordinary Share ADRs on 9 March
     2007 at a price of $55.59 per share:-

     Dr M M Slaoui                                                          50
     Mrs C Bruck Slaoui                                                     38
     Dr R G Greig                                                           177
     Mr W Louv                                                              64
     Dr D Pulman                                                            56
     Mr D Stout                                                             122
     Mr C Viehbacher                                                        50

This notification relates to a transaction notified in accordance with
Disclosure Rules 3.1.4R(1)(a) and 3.1.4R(1)(b).


S M Bicknell
Company Secretary


13 March 2007



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