Transaction in Own Shares

Johnson Matthey PLC
11 July 2006

Transaction in Own Shares

Johnson Matthey PLC announces that it has today purchased 100,000 ordinary
shares at a price of 1294.55 pence per share. The purchased shares will all be
held as treasury shares.

Following the above purchase, Johnson Matthey PLC holds 450,000 ordinary shares
as treasury shares. The total number of ordinary shares in issue (excluding
shares held as treasury shares) is 219,900,510.

S Farrant
Company Secretary
11 July 2006


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