Director/PDMR Shareholding

GlaxoSmithKline PLC
14 January 2008



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


The Administrators of the GlaxoSmithKline Executive Supplemental Savings Plan
notified the Company and the under-mentioned persons on 11 January 2008 of
changes in their interests in Ordinary share ADRs arising from an increase in
their interests under the Annual Investment Plan feature following the
re-investment of the dividend paid to shareholders on 10 January 2008 at a price
of $54.17 per ADR:-


Dr J P Garnier                                            405.65
Dr D Pulman                                                21.86
Mr D M Stout                                              332.81


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


S M Bicknell

Company Secretary

14 January 2008


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