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

Following a revaluation of the cash element of the notional investment held within the GSK 401K plan (The Plan), which is notionally held in GSK American Depositary Shares (ADSs), the Administrators of the Plan notified GlaxoSmithKline plc and the under-mentioned Persons on 6 January 2014 of the following increase in the notional allocation of ADSs on 3 January 2014 at a price of $52.80 per ADS:-

Director/PDMR

Number of ADSs

Connected Person

Number of ADSs

Dr M M Slaoui

16

Dr K Slaoui

4


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

Sonja Arseni?

Corporate Secretariat

6 January 2014


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