Director/PDMR Shareholding

GlaxoSmithKline PLC
12 October 2007




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





I give below details of changes in the interests of Directors, Persons
Discharging Managerial Responsibility or Connected Persons in the Ordinary
shares of GlaxoSmithKline plc in respect of the under-mentioned persons arising
from the purchase of Ordinary shares resulting from the reinvestment of
dividends paid to shareholders on 11 October 2007 at a price of £13.03 per
Ordinary share through the Company's ShareReward Plan ("the Plan").


Mr J S Heslop                    Acquisition of 13 Ordinary shares under the Dividend Reinvestment
                                 element of the Plan


Mr R Bondy                       Acquisition of 13 Ordinary shares under the Dividend Reinvestment
                                 element of the Plan


Mr D Learmouth                   Acquisition of 13 Ordinary shares under the Dividend Reinvestment
                                 element of the Plan


Dr D Pulman                      Acquisition of 7 Ordinary shares under the Dividend Reinvestment element
                                 of the Plan


Mr C Viehbacher                  Acquisition of 3 Ordinary shares under the Dividend Reinvestment element
                                 of the Plan


Mr A P Witty                     Acquisition of 13 Ordinary shares under the Dividend Reinvestment
                                 element of the Plan





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



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



12 October 2007


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