Director/PDMR Shareholding

GlaxoSmithKline PLC
15 October 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 £13.05 per Ordinary share, following the re-investment of
the dividend paid to shareholders on 11 October 2007.


Mr J S Heslop                                              287

Mrs P A Heslop                                             70

Mr R Bondy                                                 310

Mr D Learmouth                                             67

Dr D Pulman                                                129

Mrs C Pulman                                               42

Mr A P Witty                                               22

Mrs C M Witty                                              285



The Company and the above named persons were advised of this information on 15
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



15 October 2007


                      This information is provided by RNS
            The company news service from the London Stock Exchange