Transaction in Own Shares

Transaction in Own Shares

Johnson Matthey PLC announces that it has today purchased 72,000 ordinary
shares at a price of 1564.63 pence per share. All of the purchased shares will
be held as treasury shares.

Following the above purchase, Johnson Matthey PLC holds 3,467,000 ordinary
shares as treasury shares. The total number of ordinary shares in issue
(excluding shares held as treasury shares) is 217,005,347.

Therefore, the total number of Johnson Matthey PLC ordinary shares with voting
rights is 217,005,347. 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
21 March 2007