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:         
                                                                             
      Prudential plc group of companies                                      
                                                                             
4     Full name of shareholder(s) (if different from 3.):                    
                                                                             
      HSBC SEOUL GL BASICS MOTHER FD               5,442                     
      JACKSON PERSPECTIVE GBL BASICS               9,055                     
      JNL/M&G GLOBAL BASICS FUND                  10,727                    
      M&G GLOBAL DIVIDEND FUND                    21,850                    
      NORTRUST NOMINEE LTD A/C MHF01              48,941                     
      NORTRUST NOMINEE LTD A/C MHJ01             262,244                     
      NORTRUST NOMINEE LTD A/C MKB01             279,789                     
      NORTRUST NOMINEE LTD A/C MKK01           2,802,990                     
      NORTRUST NOMINEE LTD A/C MNC01             221,195                     
      NORTRUST NOMS LTD                          217,910                     
      NORTRUST NOMINEE LTD A/C MEJ01           7,137,527                     
      NORTRUST NOMINEE LTD A/C MVA01             138,335                     
      NORTRUST NOMINEE LTD A/C MVB01             182,135                     
      NORTRUST NOMINEE LTD A/C PUC01             134,263                     
      NORTRUST NOMINEE LTD A/C PUF01              44,982                     
      NORTRUST NOMINEE LTD A/C PUI01               8,061                     
      NORTRUST NOMINEE LTD A/C PUR01             724,160                     
      NORTRUST NOMINEE LTD A/C PUS01              10,974                     
      PRU US TECH DUMMY FUND                      30,686                     
      PRUCLT HSBC GIS NOM (UK) PAC AC          3,895,502                     
      PRUCLT HSBC GIS NOM (UK) PHL AC            439,312                     
      PRUCLT HSBC GIS NOM (UK) PPL AC          1,044,069                     
      PRUCLT HSBC GIS NOM (UK) HYBF AC            61,845                     
      RECOVERY INV COMPANY LIMITED               103,907
                                                                             
5     Date of the transaction (and date on which the threshold is crossed or 
      reached if different):                                                 
                                                                             
      11 February 2009                                                       
                                                                             
6     Date on which issuer notified:                                         
                                                                             
      12 February 2009                                                       
                                                                             
7     Threshold(s) that is/are crossed or reached:                           
                                                                             
      See item 13                                                            
                                                                             
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: 17,738,270                                           
                                                                             
      Number of voting rights: 17,738,270                                    
                                                                             
      Resulting situation after the triggering transaction:                  
                                                                             
      Number of shares (direct): 17,835,901                                  
                                                                             
      Number of voting rights (direct): 17,835,901                           
                                                                             
      Number of voting rights (indirect):                                    
                                                                             
      % of voting rights (direct): 8.30%                                     
                                                                             
      % of voting rights (indirect):                                         
                                                                             
      Total voting rights: 17,835,901 (8.30%)                                
                                                                             
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)                                                               
                                                                             
      M&G Securities 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                                                 
                                                                             
      M&G Securities Limited (wholly owned subsidiary of M&G Limited) has    
      moved to a 5% notifiable interest triggering this notification         
                                                                             
14    Contact Name:                                                          
                                                                             
      Angela Purtill, Assistant Company Secretary, Johnson Matthey plc       
                                                                             
      Contact Telephone Number:                                              
                                                                             
      020 7269 8461