Director/PDMR Shareholding

GlaxoSmithKline PLC
16 February 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.


   14 February 2007              Abacus (GSK) Trustees Limited, as trustee of the
                                 GlaxoSmithKline Employee Trust, ("the GSK Trust"), transferred
                                 387,118 Ordinary Shares in the Company to participants in the
                                 SmithKline Beecham Employee Share Option Plan 1991.


The Company was advised of this transaction on 15 February 2007.


   15 February 2007              The GSK Trust transferred 155,167 Ordinary Shares in the
                                 Company to participants in the SmithKline Beecham Employee
                                 Share Option Plan 1991.


The Company was advised of this transaction on 16 February 2007.


The GSK Trust is a discretionary trust of which all employees or former
employees of GlaxoSmithKline plc and its subsidiaries are potential
beneficiaries. Three of the Company's directors, Dr J-P Garnier, Dr M M Slaoui
and Mr J S Heslop are therefore interested in the shares held in the GSK Trust
from time to time in the same way as other 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 February 2007


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