Director/PDMR Shareholding

GlaxoSmithKline PLC
03 January 2008




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



I give below details of changes in the directors' interests in the Ordinary
Shares and American Depository Shares (ADSs) of GlaxoSmithKline plc.



On 31 December 2007, the Company's Non-Executive Directors were provisionally
allocated the following awards over Ordinary Shares and American Depository
Shares (ADSs) in the Company through the Annual Re-investment of Dividends paid
throughout 2007:



SmithKline Beecham Non-Executive Directors Retainer Fee and Share Allocation
Award - Annual Dividend Reinvestment


Non-Executive Director                              No. of Ordinary     Average Price (£)
                                                             Shares
Sir Ian Prosser                                              42.361               12.8433





GlaxoSmithKline Non-Executive Directors Automatic Share Award and Elected Share
Award - Annual Dividend Reinvestment


Non-Executive Director                 No. of Ordinary Average Price (£)      No. of ADSs    Average Price
                                                Shares                                                 ($)
Sir Christopher Gent                            728.17           12.8433
Prof Sir Roy Anderson                                -                 -
Dr Stephanie Burns                                                                   5.92            50.82
Mr Lawrence Culp                                                                   357.82            50.82
Sir Crispin Davis                               729.43           12.8433
Sir Deryck Maughan                                                                 278.73            50.82
Dr Daniel Podolsky                                                                  43.48            50.82
Sir Ian Prosser                                 767.65           12.8433
Dr Ronaldo Schmitz                              666.93           12.8433
Mr Tom de Swaan                                  34.26           12.8433
Sir Robert Wilson                               191.97           12.8433



The Company and the Non-Executive Directors were informed of these allocations
on 2 January 2008.



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



S M Bicknell

Company Secretary

3 January 2008


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