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                               2,253,145*
    BT Globenet Nominees Limited                                         2,350*
    Chase GA Group Nominees Limited                                  6,326,907*
    Chase Nominees Limited                                             656,967*
    CUIM Nominee Limited                                             1,525,739*
    Triodos SICAV I Values Equity Fund                                   4,100*
    Vidacos Nominees Limited                                            14,252*
                                                                               
    * denotes direct interest                                                  
                                                                               
    BNP Paribas - London                                                 59,620
    Chase Nominees Limited                                            1,486,187
    State Street Nominees Limited                                       713,184
    Triodos Meerwaarde Aandelen Fonds                                    50,000
    Triodos Meerwaarde Mixfonds                                           8,300
    Vidacos Nominees Limited                                            378,000
    White Rose Nominees Limited                                           3,380
    RC Greig Nominees Limited                                             1,300
                                                                               
5   Date of the transaction (and date on which the threshold is crossed or     
    reached if different):                                                     
                                                                               
    14 October 2008                                                            
                                                                               
6   Date on which issuer notified:                                             
                                                                               
    15 October 2008                                                            
                                                                               
7   Threshold(s) that is/are crossed or reached:                               
                                                                               
    4% to 5% 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: 11,397,985                                               
                                                                               
    Number of voting rights: 11,397,985                                        
                                                                               
    Resulting situation after the triggering transaction:                      
                                                                               
    Number of shares (direct): 10,783,460                                      
                                                                               
    Number of voting rights (direct): 10,783,460                               
                                                                               
    Number of voting rights (indirect): 2,699,971                              
                                                                               
    % of voting rights (direct): 5.02%                                         
                                                                               
    % of voting rights (indirect): 1.26%                                       
                                                                               
    Total voting rights: 13,483,431 shares (6.28%)                             
                                                                               
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)                                                                    
                                                                               
    The investments are administered by Commercial Union Trustees Limited, with
    the following chain of control:                                            
                                                                               
    Commercial Union Trustees Limited:                                         
                                                                               
      * Aviva plc (Parent Company)                                             
      * Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc)    
      * Undershaft Limited (wholly owned subsidiary of Aviva Group Holdings    
        Limited)                                                               
      * Commercial Union Trustees Limited (wholly owned subsidiary of          
        Undershaft Limited)                                                  
  
    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