Director/PDMR Shareholding

GlaxoSmithKline PLC
13 July 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 at a price of £12.69 per Ordinary Share on
12 July 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 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 2 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
13 July 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

13 July 2007


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