Holding(s) in Company

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 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): 
                                                                               
     1 December 2009                                                           
                                                                               
6.   Date on which issuer notified:                                            
                                                                               
     4 December 2009                                                           
                                                                               
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):                   
                                                                               
     GB0004764071                                                              
                                                                               
     Situation previous to the triggering transaction:                         
                                                                               
     Number of shares: N/A                                                     
                                                                               
     Number of voting rights: N/A                                              
                                                                               
     Resulting situation after the triggering transaction:                     
                                                                               
     Number of shares (direct): N/A                                            
                                                                               
     Number of voting rights (direct): N/A                                     
                                                                               
     Number of voting rights (indirect): 20,947,855                            
                                                                               
     % of voting rights (direct): N/A                                          
                                                                               
     % of voting rights (indirect): 9.76%                                      
                                                                               
B    QUALIFYING FINANCIAL INSTRUMENTS                                          
                                                                               
     N/A                                                                       
                                                                               
C    FINANCIAL INSTRUMENTS WITH SIMILAR ECONOMIC EFFECT TO QUALIFYING FNIANCIAL
     INSTRUMENTS                                                               
                                                                               
     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: 966,748                     
                                                                               
     % of voting rights (Nominal): 0.45%                                       
                                                                               
     % of voting rights (Delta): N/A                                           
                                                                               
     Total voting rights: 21,914,603 shares (10.21%)                           
                                                                               
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 - 21,914,603 shares (10.21%) 
                                                                               
     On 1 December 2009, the Barclays Global Investors (BGI) business was acquired by BlackRock, Inc. The combined
     holdings of BlackRock, Inc. following this acquisition triggered this disclosure requirement. 
                                                                               
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:                                                             
                                                                               
15.  Angela Purtill, Deputy Company Secretary, Johnson Matthey plc             
                                                                               
     Contact Telephone Number:                                                
     020 7269 8461                                                             

4 December 2009