Director/PDMR Shareholding

GlaxoSmithKline PLC
11 January 2008




   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 £13.89 per Ordinary share, following the re-investment of
the dividend paid to shareholders on 10 January 2008.


Mr J S Heslop                295
Mrs P A Heslop                71
Mr R Bondy                   318
Mr D Learmouth                69
Dr D Pulman                  132
Mrs C R Pulman                44
Mr A P Witty                  22
Mrs C M Witty                292


The Company and the above named persons were advised of this information on 11
January 2008.

This notification relates to a transaction notified in accordance with
Disclosure and Transparency Rule 3.1.4R(1)(a).




S M Bicknell
Company Secretary

11 January 2008




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