Director/PDMR Shareholding

GlaxoSmithKline PLC
13 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 12 February 2007 of an increase in the
notional allocation of Ordinary Share ADRs on 9 February 2007 at a price of
$56.38 per share:-
Dr JP Garnier                                                          88
Dr M M Slaoui                                                          62
Mrs C Bruck Slaoui                                                     2
Dr R G Greig                                                           18
Mr W Louv                                                              4
Mr D Phelan                                                            19
Dr D Pulman                                                            6
Mr D Stout                                                             42
Mr C Viehbacher                                                        7



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 February 2007


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