Transaction in Own Shares

Transaction in Own Shares

Johnson Matthey PLC announces that on 10 September 2007 it purchased 150,000
ordinary shares at a price of 1544.48 pence per share. All of the purchased
shares will be held as treasury shares.

Following the above purchase, Johnson Matthey PLC holds 5,701,739 ordinary
shares as treasury shares. The total number of ordinary shares in issue
(excluding shares held as treasury shares) is 214,971,874.

Therefore, the total number of Johnson Matthey PLC ordinary shares with voting
rights is 214,971,874. This figure may be used by shareholders and other
parties subject to disclosure obligations as the denominator for calculations
by which they will determine if they are required to notify their interest in,
or a change to their interest in, Johnson Matthey PLC under the FSA's
Disclosure and Transparency Rules.

S Farrant

Company Secretary

10 September 2007