GlaxoSmithKline plc (the "Company") announces that in accordance with the authority granted by shareholders at the Company's Annual General Meeting on 6th May 2010 it purchased 425,000 of its Ordinary shares of 25 pence each ("shares") on 31 March 2011.
The highest price paid per share was 1202.5 pence per share.
The lowest price paid per share was 1190.5 pence per share.
The shares will be cancelled.
The Company holds 493,224,284 of its shares in Treasury, representing 8.71% of the total issued share capital of the Company and 9.54% of the total voting rights.
The Company has 5,171,221,373 shares in issue (excluding Treasury shares). This number represents the total voting rights in the Company and may be used by shareholders as the denominator for the calculations by which they can determine if they are required to notify their interest in, or a change to their interest in the Company under the Financial Services Authority's Disclosure and Transparency Rules.
This announcement does not constitute, or form part of, an offer or any solicitation of an offer to purchase or subscribe for securities in any jurisdiction and is in conformity with the Financial Services Authority's Disclosure and Transparency Rules.