NOTIFICATION OF MAJOR INTERESTS IN SHARES

1.   Identity of the issuer or the underlying issuer of existing shares to
     which voting rights are attached:

     Johnson Matthey Plc

2.   Reason for the notification:

     An acquisition or disposal of voting rights

     An acquisition or disposal of instruments with similar economic effect to
     qualifying financial instruments

3.   Full name of person(s) subject to the notification obligation:

     BlackRock, Inc.

4.   Full name of shareholder(s) (if different from 3.):

     N/A

5.   Date of the transaction (and date on which the threshold is crossed or
     reached if different):

     21 January 2014

6.   Date on which issuer notified:

     22 January 2014

7.   Threshold(s) that is/are crossed or reached:

     Holding has gone above 10%

8.   Notified details:

A.   VOTING RIGHTS ATTACHED TO SHARES:

     Class/type of shares (if possible using the ISIN CODE): GB00B70FPS60

     Situation previous to the triggering transaction:

     Number of shares: 19,518,149

     Number of voting rights: 19,518,149

     Resulting situation after the triggering transaction:

     Number of shares (direct): N/A

     Number of voting rights (direct): N/A

     Number of voting rights (indirect): 20,240,386

     % of voting rights (direct): N/A

     % of voting rights (indirect): 9.88%

B    QUALIFYING FINANCIAL INSTRUMENTS

     N/A

C    FINANCIAL INSTRUMENTS WITH SIMILAR ECONOMIC EFFECT TO QUALIFYING FNIANCIAL
     INSTRUMENTS

     Resulting situation after triggering the transaction:

     Type of financial instrument: CFD

     Exercise price: N/A

     Expiration date: N/A

     Exercise/Conversion period: N/A

     Number of voting rights instrument refers to: 314,799

     % of voting rights (Nominal): 0.15%

     % of voting rights (Delta): 0.15%

     Total voting rights: 20,555,185 shares (10.03%)

9.   Chain of controlled undertakings through which the voting rights and/or
     the financial instruments are effectively held if applicable:

     BlackRock Investment Management (UK) Limited - 20,555,185 shares (10.03%)

10.  Name of the proxy holder:

11.  Number of voting rights proxy holder will cease to hold:

12.  Date on which proxy holder will cease to hold voting rights:

13.  Additional Information:

14.  Contact Name: Angela Purtill, Deputy Company Secretary, Johnson Matthey
     Plc

15.  Contact Telephone Number: 020 7269 8461

22 January 2014