Notice of AGM

GlaxoSmithKline plc

Publication of 2017 Notice of Annual General Meeting

GlaxoSmithKline plc (the 'Company') will today publish on the Company's website, http://www.gsk.com/en-gb/investors/shareholder-information/annual-general-meeting/, its 2017 Notice of Annual General Meeting (the '2017 AGM Notice'), together with its Annual Summary 2016.

The Company's Annual General Meeting will be held on Thursday 4 May 2017 at 2.30 pm at The Queen Elizabeth II Centre, Broad Sanctuary, Westminster, London SW1P 3EE.

The 2017 AGM Notice, together with the Annual Report 2016 and Annual Summary 2016, will be sent to those shareholders who have elected to receive paper communications today.

In compliance with Listing Rule 9.6.1 of the UK Financial Conduct Authority, the 2017 AGM Notice and Annual Summary 2016 will be submitted to the UK Listing Authority and will, in due course, be available for inspection at www.morningstar.co.uk/uk/NSM.

V A Whyte

Company Secretary

30 March 2017