Director/PDMR Shareholding

GlaxoSmithKline PLC
16 April 2007


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


I give below details of an increase in interests in the Ordinary Shares of
GlaxoSmithKline plc in respect of the personal holdings of the under-mentioned
persons at a price of £14.23 per Ordinary Share, following the re-investment of
the dividend paid to shareholders on 12 April 2007.

Mr J S Heslop                                              190
Mrs P A Heslop                                             72
Mr R Bondy                                                 326
Mr D Learmouth                                             39
Dr D Pulman                                                135
Mrs C Pulman                                               45
Mr A P Witty                                               23
Mrs C Witty                                                330

The Company and the above named persons were advised of this information on 16
April 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

16 April 2007



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