Director/PDMR Shareholding

GlaxoSmithKline PLC
02 January 2008




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


Following a re-valuation of the cash element of the notional investment held
within the US Retirement Savings Plan (the "Plan"), which is notionally held in
GSK Ordinary Share ADRs, the Administrators of the Plan notified GlaxoSmithKline
plc and Dr R G Greig on 31 December 2007 of an increase in the notional
allocation of Ordinary share ADRs on 28 December 2007 at a price of $50.75 per
ADR share:-


                                                     No. of ADRs
Dr R G Greig                                             10


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



S M Bicknell
Company Secretary


2 January 2008




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