As a result of an administrative error by the Company's external share plan administrator, in connection with the number of shares actually sold, this announcement replaces the original announcement released on 23 October 2014 at 17:26 (RNS No: 1732V).

GlaxoSmithKline plc

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

In accordance with DTR 3.1.4R(1)(a) I give below details of changes in the interests of Sir Andrew Witty, a Director, in the Ordinary Shares of GlaxoSmithKline plc (the "Company"):

The exercise of options over 77,500 Ordinary Shares on 23 October 2014, granted on 2 December 2004 under the GlaxoSmithKline Share Option Plan at a price of £11.23 per share, and the sale of 69,905 Ordinary Shares at a price of £13.84 per share on 23 October 2014.

The Company was advised of the revised transaction details on 13 November 2014.

V A Whyte

Company Secretary

14 November 2014


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