Director/PDMR Shareholding

GlaxoSmithKline PLC
14 January 2008



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



I give below details of changes in interests in the Ordinary Shares of
GlaxoSmithKline plc in respect of the under-mentioned persons, arising from the
purchase of Ordinary Shares on 10 January 2008 under a Single Company ISA at a
price of £13.85 per Ordinary Share:


Mr E J Gray                                      5

Mr J S Heslop                                    5

Mr A P Witty                                     5



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


14 January 2008


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