Director/PDMR Shareholding

GlaxoSmithKline PLC
12 October 2007


   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 12 October 2007 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 11 October 2007 at a price
of $52.26 per share:-


Dr JP Garnier                                                   386.91
Dr D Pulman                                                     20.85
Mr D Stout                                                      317.44


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

12 October 2007


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