Director/PDMR Shareholding

GlaxoSmithKline PLC 13 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. The Administrators of the GlaxoSmithKline US Retirement Savings Plan ("the Plan") notified GlaxoSmithKline plc on 12 February 2007, that as a result of a movement in the fund on 9 February 2007, the number of Ordinary Share ADRs held by the fund had changed from 16,417,421 to 16,417,793 at an average price of $55.84 The Plan is a discretionary fund of which all employees or former employees of GlaxoSmithKline plc and its subsidiaries are potential beneficiaries. Two of the Company's directors, Dr J P Garnier and Dr M M Slaoui are therefore potentially interested in the shares held in the fund 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 13 February 2007 This information is provided by RNS The company news service from the London Stock Exchange

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