Director/PDMR Shareholding

GlaxoSmithKline PLC
16 February 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 16 February 2007 of an increase in the
notional allocation of Ordinary Share ADRs on 15 February 2007 at a price of
$57.65 per share:-

Dr JP Garnier                                                          63
Dr M M Slaoui                                                          2
Dr R G Greig                                                           76
Mr W Louv                                                              5
Mr D Phelan                                                            184
Dr D Pulman                                                            13
Mr D Stout                                                             32
Mr C Viehbacher                                                        4



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



16 February 2007


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