Director/PDMR Shareholding

GlaxoSmithKline PLC
12 September 2007



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



I give below details of changes in the interests of the under-mentioned Director
and Persons Discharging Managerial Responsibility in the Ordinary shares of
GlaxoSmithKline plc arising from the purchase of Ordinary shares at a price of
£13.15 per Ordinary share on 11 September 2007 through the Company's ShareReward
Plan ("the Plan") which the under mentioned persons entered on 5 October 2001:


Mr J S Heslop       Acquisition of 9 Ordinary shares under the partnership 
                    element of the Plan (personal contribution)

                    Acquisition of 9 Ordinary shares under the matching element 
                    of the Plan (Company contribution)

Mr R Bondy          Acquisition of 9 Ordinary shares under the partnership 
                    element of the Plan (personal contribution)

                    Acquisition of 9 Ordinary shares under the matching element 
                    of the Plan (Company contribution)

Mr D Learmouth      Acquisition of 9 Ordinary shares under the partnership 
                    element of the Plan (personal contribution)

                    Acquisition of 9 Ordinary shares under the matching element 
                    of the Plan (Company contribution)

Mr A P Witty        Acquisition of 9 Ordinary shares under the partnership 
                    element of the Plan (personal contribution)

                    Acquisition of 9 Ordinary shares under the matching element 
                    of the Plan (Company contribution)


The Company and the above-mentioned persons were advised of this information on
12 September 2007.

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


S M Bicknell
Company Secretary

12 September 2007


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