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                            
                                                                             
3     Full name of person(s) subject to the notification obligation:         
                                                                             
      Aviva plc and its subsidiaries                                         
                                                                             
4     Full name of shareholder(s) (if different from 3.):                    
                                                                             
      BNY Norwich Union Nominees Limited              1,228,254*             
      BT Globenet Nominees Limited                        2,350*             
      Chase GA Group Nominees Limited                 3,840,414*             
      Chase Nominees Limited                            274,884*             
      CUIM Nominee Limited                              827,764*             
      Triodos SICAV I Values Equity Fund                  4,100*             
      Vidacos Nominees Limited                           14,252*
                                                                             
      * denotes direct interest                                              
                                                                             
5     Date of the transaction (and date on which the threshold is crossed or 
      reached if different):                                                 
                                                                             
      6 May 2009                                                             
                                                                             
6     Date on which issuer notified:                                         
                                                                             
      7 May 2009                                                             
                                                                             
7     Threshold(s) that is/are crossed or reached:                           
                                                                             
      3% to <3% change at Direct Interest Level                              
                                                                             
8     Notified details:                                                      
                                                                             
      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: 10,447,162                                           
                                                                             
      Number of voting rights: 10,447,162                                    
                                                                             
      Resulting situation after the triggering transaction:                  
                                                                             
      Number of shares (direct): 6,192,018                                   
                                                                             
      Number of voting rights (direct): 6,192,018                            
                                                                             
      Number of voting rights (indirect): Not disclosable                    
                                                                             
      % of voting rights (direct): 2.88%                                     
                                                                             
      % of voting rights (indirect): Not disclosable                         
                                                                             
      Total voting rights: 6,192,018 shares (2.88%)                          
                                                                             
9     Chain of controlled undertakings through which the voting rights and/or
      the financial instruments are effectively held if applicable:          
                                                                             
      The voting rights are managed and controlled by Aviva Investors Global 
      Services Limited & Delta Lloyd Asset Management NV, with the following
      chain of controlled undertakings:-                                     
                                                                             
      Aviva Investors Global Services Limited:                               
                                                                             
        * Aviva plc (Parent Company)                                         
        * Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc)
        * Aviva Investors Holdings Limited (wholly owned subsidiary of Aviva 
          Group Holdings Limited)                                            
        * Aviva Investors Global Services Limited (wholly owned subsidiary of
          Aviva Investors Holdings Limited)                                  
                                                                             
      Delta Lloyd Asset Management NV:                                       
                                                                             
        * Aviva plc (Parent Company)                                         
        * Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc)
        * Aviva International Insurance Limited (wholly owned subsidiary of  
          Aviva Group Holdings Limited)                                      
        * Aviva Insurance Limited (wholly owned subsidiary of Aviva          
          International Insurance Limited)                                   
        * Aviva International Holdings Limited (wholly owned subsidiary of   
          Aviva Insurance Limited)                                           
        * CGU International Holdings BV (wholly owned subsidiary of Aviva    
          International Holdings Limited)                                    
        * Delta Lloyd NV (majority owned subsidiary of CGU International     
          Holdings BV)                                                       
        * Delta Lloyd Asset Management NV (wholly owned subsidiary of Delta  
          Lloyd NV)                                                          
                                                                             
      PROXY VOTING:                                                          
                                                                             
10    Name of the proxy holder:                                              
                                                                             
      See Section 4                                                          
                                                                             
11    Number of voting rights proxy holder will cease to hold:               
                                                                             
      N/A                                                                    
                                                                             
12    Date on which proxy holder will cease to hold voting rights:           
                                                                             
      N/A                                                                    
                                                                             
13    Additional Information                                                 
                                                                             
14    Contact Name:                                                          
                                                                             
      Angela Purtill, Assistant Company Secretary, Johnson Matthey plc       
                                                                             
      Contact Telephone Number:                                              
                                                                             
      020 7269 8461