Director/PDMR Shareholding

GlaxoSmithKline PLC
10 October 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
£13.17 per Ordinary share on 9 October 2007 through the Company's ShareReward
Plan ("the Plan").


Mr J S Heslop   Acquisition of 10 Ordinary shares under the partnership element 
                of the Plan (personal contribution)

                Acquisition of 10 Ordinary shares under the matching element of 
                the Plan (Company contribution)


Mr R Bondy      Acquisition of 10 Ordinary shares under the partnership element 
                of the Plan (personal contribution)

                Acquisition of 10 Ordinary shares under the matching element of 
                the Plan (Company contribution)


Mr D Learmouth  Acquisition of 10 Ordinary shares under the partnership element 
                of the Plan (personal contribution)

                Acquisition of 10 Ordinary shares under the matching element of 
                the Plan (Company contribution)


Mr A P Witty    Acquisition of 10 Ordinary shares under the partnership element 
                of the Plan (personal contribution)

                Acquisition of 10 Ordinary shares under the matching element of 
                the Plan (Company contribution)


The Company and the above-mentioned persons were advised of this information on
10 October 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

10 October  2007




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