Director/PDMR Shareholding

GlaxoSmithKline PLC
09 October 2007



   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 the under-mentioned person on 9 October 2007 of:

(i)     An increase in the notional allocation of Ordinary Share ADRs on 
     5 October 2007 at a price of $54.07 per ADR share:-


     Dr R G Greig                3


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


S M Bicknell
Company Secretary

9 October 2007




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