Director/PDMR Shareholding

GlaxoSmithKline PLC 23 March 2007 Notification of Transactions of Directors, Persons Discharging Managerial Responsibility or Connected Persons I give below details of changes in the interests of Directors, Persons Discharging Managerial Responsibility or Connected Persons in the Ordinary Shares and Ordinary Share ADRs ("ADRs") of GlaxoSmithKline plc ("the Company"). 22 March 2007 Abacus (GSK) Trustees Limited, as trustee of the GlaxoSmithKline Employee Trust, ("the GSK Trust"), transferred 4,736 Ordinary Shares in the Company to participants in the SmithKline Beecham Employee Share Option Plan 1991. Abacus Corporate Trustees Limited, as trustee of the GlaxoSmithKline (US) Trust ("the GSK US Trust") transferred 25 ADRs of GlaxoSmithKline plc to participants in the GlaxoSmithKline Performance Share Plan. The Company was advised of these transactions on 22 March 2007. 22 March 2007 The GSK US Trust sold 2,043 ADRs of GlaxoSmithKline plc at a price of $55.64 per ADR on behalf of participants in the GlaxoSmithKline Performance Share Plan. The GSK US Trust transferred 4,422 ADRs of GlaxoSmithKline plc to participants in the GlaxoSmithKline Performance Share Plan. The Company was advised of these transactions on 23 March 2007. The GSK Trust is a discretionary trust of which all employees or former employees of GlaxoSmithKline plc and its subsidiaries are potential beneficiaries. Three of the Company's directors, Dr J-P Garnier, Dr M M Slaoui and Mr J S Heslop are therefore interested in the shares held in the GSK Trust from time to time in the same way as other employees or former employees of GlaxoSmithKline plc and its subsidiaries. The GSK US Trust is a grantor trust of which all employees or former employees of SmithKline Beecham Corporation and its subsidiaries are potential beneficiaries. Two of the Company's directors, Dr J-P Garnier and Dr M M Slaoui are therefore interested in the shares held in the GSK US Trust from time to time in the same way as other employees or former employees of SmithKline Beecham Corporation and its subsidiaries. This notification relates to a transaction notified in accordance with Disclosure Rule 3.1.4R(1)(b). S M Bicknell Company Secretary 23 March 2007 This information is provided by RNS The company news service from the London Stock Exchange

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GSK (GSK)
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