Director/PDMR Shareholding

GlaxoSmithKline PLC 16 February 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 of GlaxoSmithKline plc. 14 February 2007 Abacus (GSK) Trustees Limited, as trustee of the GlaxoSmithKline Employee Trust, ("the GSK Trust"), transferred 387,118 Ordinary Shares in the Company to participants in the SmithKline Beecham Employee Share Option Plan 1991. The Company was advised of this transaction on 15 February 2007. 15 February 2007 The GSK Trust transferred 155,167 Ordinary Shares in the Company to participants in the SmithKline Beecham Employee Share Option Plan 1991. The Company was advised of this transaction on 16 February 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. This notification relates to a transaction notified in accordance with Disclosure Rule 3.1.4R(1)(b). S M Bicknell Company Secretary 16 February 2007 This information is provided by RNS The company news service from the London Stock Exchange

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GSK (GSK)
UK 100

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