Total Voting Rights

Total Voting Rights and Capital

In conformity with Disclosure and Transparency Rule 5.6.1R, GlaxoSmithKline plc (the Company) hereby notifies the market of the following:

The Company's issued share capital as at 30 April 2013 consisted of 5,421,767,041 Ordinary Shares of 25p each, of which 498,431,327 Ordinary Shares were held in Treasury.

Therefore, the total number of voting rights in the Company is 4,923,335,714. This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the Financial Conduct Authority's Disclosure and Transparency Rules.

V A Whyte

Company Secretary

1 May 2013