Director/PDMR Shareholding

GlaxoSmithKline PLC
16 January 2007





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



I give below details of changes in the interests of Directors, Persons
Discharging Managerial Responsibility or Connected Persons in the Ordinary
Shares of GlaxoSmithKline plc.




   11 January 2007         The Administrators of the SmithKline Beecham Employee Benefit Trust ("the
                           Trust") notified the Company on 15 January 2007 that 38,040 Ordinary shares
                           had been transferred from the Trust to a participant in the SmithKline Beecham
                           Annual Investment Plan.


   12 January 2007         The Trust notified the Company on 15 January 2007 that 380 Ordinary Shares had
                           been acquired by the Trust at a price of £13.70 per share following the
                           re-investment of the dividend paid to the Trust on behalf of participants in
                           the SmithKline Beecham Bonus Investment Plan on 4 January 2007.



                           The Trust also notified the Company on 15 January 2007 that 9,668 Ordinary
                           Shares had been acquired by the Trust at a price of £13.70 per share following
                           the re-investment of the dividend paid to the Trust on behalf of participants
                           in the SmithKline Beecham Annual Investment Plan on 4 January 2007.



The Trust is a discretionary fund of which all non US employees or former
employees of GlaxoSmithKline plc and its subsidiaries are potential
beneficiaries. One of the Company's directors, Mr J S Heslop is therefore
interested in the shares held in the fund from time to time in the same way as
other non US employees or former employees of GlaxoSmithKline plc and its
subsidiaries.



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





S M Bicknell

Company Secretary



16 January 2007


                      This information is provided by RNS
            The company news service from the London Stock Exchange