Additional Listing

GlaxoSmithKline plc

Blocklisting Application

Application has been made to the Financial Conduct Authority and the London Stock Exchange Plc for a total of 50,000 Ordinary shares of 25p each (shares) to be admitted to the Official List. Admission of the shares is expected to be on 19 March 2014.

These shares are being reserved under a block listing and will be issued as a result of the award of shares pursuant to the following scheme:

When issued, these shares will rank pari passu with the existing ordinary shares.

V A Whyte

Company Secretary

13 March 2014