Holding(s) in Company

TR-1 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:             
                                                                               
    Prudential plc group of companies                                          
                                                                               
4.  Full name of shareholder(s) (if different from 3.):                        
                                                                               
    MAGIM HSBC GIS NOM (UK) SALI        34,221                                 
    HSBC SEOUL GL BASICS MOTHER FD       6,367                                 
    NORTRUST NOMINEE LTD A/C MHF01      46,581                                 
    NORTRUST NOMINEE LTD A/C MHJ01     332,244                                 
    NORTRUST NOMINEE LTD A/C MKB01     519,718                                 
    NORTRUST NOMINEE LTD A/C MKK01   2,275,000                                 
    NORTRUST NOMINEE LTD               144,926                                 
    NORTRUST NOMINEE LTD A/C MEJ01   6,050,000                                 
    NORTRUST NOMINEE LTD A/C MVA01      20,000                                 
    NORTRUST NOMINEE LTD A/C MVB01     154,311                                 
    NORTRUST NOMINEE LTD A/C PUC01     104,125                                 
    NORTRUST NOMINEE LTD A/C PUF01      42,939                                 
    NORTRUST NOMINEE LTD A/C PUI01       7,393                                 
    NORTRUST NOMINEE LTD A/C PUR01     540,437                                 
    NORTRUST NOMINEE LTD A/C PUS01      12,330                                 
    PRU US TECH DUMMY FUND              17,886                                 
    PRUCLT HSBC GIS NOM (UK) PAC AC  3,289,711                                 
    PRUCLT HSBC GIS NOM (UK) PHL AC    318,934                                 
    PRUCLT HSBC GIS NOM (UK) PPL AC    867,308                                 
    PRUCLT HSBC GIS NOM (UK) EQBF AC    13,787                                 
    PRUCLT HSBC GIS NOM (UK) HYBF AC    57,004                                 
    PRUCLT HSBC GIS NOM (UK) MNBF AC    18,656                                 
    PRUCLT HSBC GIS NOM (UK) PENE AC    76,252                                 
    RBS INTERNATIONAL (GUERNSEY)       127,569                                 
    RECOVERY INV COMPANY LIMITED       105,146                                 
                                                                               
5.  Date of the transaction (and date on which the threshold is crossed or     
    reached if different):                                                     
                                                                               
    3 September 2008                                                           
                                                                               
6.  Date on which issuer notified:                                             
                                                                               
    4 September 2008                                                           
                                                                               
7.  Threshold(s) that is/are crossed or reached:                               
                                                                               
    7%                                                                         
                                                                               
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: 14,782,845                                               
                                                                               
    Number of voting rights: 14,782,845                                        
                                                                               
    Resulting situation after the triggering transaction:                      
                                                                               
    Number of shares (direct): 15,182,845                                      
                                                                               
    Number of voting rights (direct): 15,182,845                               
                                                                               
    Number of voting rights (indirect): -                                      
                                                                               
    % of voting rights (direct): 7.07%                                         
                                                                               
    % of voting rights (indirect): -                                           
                                                                               
    Total number of voting rights: 15,182,845                                  
                                                                               
    Total % of voting rights: 7.07%                                            
                                                                               
9.  Chain of controlled undertakings through which the voting rights and/or the
    financial instruments are effectively held if applicable:                  
                                                                               
    Prudential plc (parent company)                                            
    M&G Group Limited (wholly owned subsidiary of Prudential plc)              
    M&G Limited (wholly owned subsidiary of M&G Group Limited)                 
    M&G Investment Management Limited (wholly owned subsidiary of M&G          
    Limited)                                                                   
                                                                               
    PROXY VOTING:                                                              
                                                                               
10. Name of the proxy holder:                                                  
                                                                               
    N/A                                                                        
                                                                               
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           
                                                                               
15. Contact Telephone Number:                                                  
                                                                               
    020 7269 8461                                                              
                                                                               
    4 September 2008