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                                                            
                                                                               
4    Full name of shareholder(s) (if different from 3.):                       
                                                                               
     REGISTERED HOLDER                      HOLDING         VOTING RIGHTS                                   
                                                                               
     Prudential plc, direct holding:                                           
                                                                               
     HSBC SEOUL GL BASICS MOTHER FD             759                   759                                   
     M&G GLOBAL DIVIDEND FUND               278,817               278,817                                  
     NORTRUST NOMINEES LTD A/C MHF01         45,418                45,418                            
     NORTRUST NOMINEES LTD A/C MKK01      3,750,000             3,750,000                       
     NORTRUST NOMS LTD                      443,221               443,221                                         
     NORTRUST NOMS LTD A/C MEJ01          2,900,000             2,900,000                           
     NORTRUST NOMS LTD A/C MVA01            123,810               123,810                              
     NORTRUST NOMS LTD A/C MVB01             80,027                80,027                                 
     NORTRUST NOMS LTD A/C PUC01             92,400                92,400                                 
     NORTRUST NOMS LTD A/C PUE01                600                   600                                       
     NORTRUST NOMS LTD A/C PUS01              8,931                 8,931                                   
     PRUCLT HSBC GIS NOM(UK) PAC AC       2,208,028             2,208,028                        
     PRUCLT HSBC GIS NOM(UK) PPL AC         758,205               758,205                            
     PTF 28,288 28,288                                                         
                                                                               
     Prudential plc, indirect holding:                                         
                                                                               
     JNL/M&G GLOBAL BASICS FUND              64,776                64,776                                   
     STATE STREET NOMS                       12,858                12,858                                            
                                                                               
     Total                                                     10,796,138 (5.02%) 
                                                                       
     M&G Group Limited                                                         
                                                                               
     HSBC SEOUL GL BASICS MOTHER FD              759                  759                                    
     M&G GLOBAL DIVIDEND FUND                278,817              278,817                                  
     NORTRUST NOMINEES LTD A/C MHF01          45,418               45,418                             
     NORTRUST NOMINEES LTD A/C MKK01       3,750,000            3,750,000                      
     NORTRUST NOMS LTD                       443,221              443,221                                        
     NORTRUST NOMS LTD A/C MEJ01           2,900,000            2,900,000                           
     NORTRUST NOMS LTD A/C MVA01             123,810              123,810                               
     NORTRUST NOMS LTD A/C MVB01              80,027               80,027                                  
     NORTRUST NOMS LTD A/C PUC01              92,400               92,400                                 
     NORTRUST NOMS LTD A/C PUE01                 600                  600                                       
     NORTRUST NOMS LTD A/C PUS01               8,931                8,931                                   
     PRUCLT HSBC GIS NOM(UK) PAC AC        2,208,028            2,208,028                        
     PRUCLT HSBC GIS NOM(UK) PPL AC          758,205              758,205                            
     JNL/M&G GLOBAL BASICS FUND               64,776               64,776                                  
     STATE STREET NOMS                        12,858               12,858                                           
                                                                               
     Total                                                     10,767,850 (5.01%)
                                                                   
     M&G LIMITED                                                               
                                                                               
     HSBC SEOUL GL BASICS MOTHER FD               759                 759                                     
     M&G GLOBAL DIVIDEND FUND                 278,817             278,817                                   
     NORTRUST NOMINEES LTD A/C MHF01           45,418              45,418                              
     NORTRUST NOMINEES LTD A/C MKK01        3,750,000           3,750,000                        
     NORTRUST NOMS LTD                        443,221             443,221                                          
     NORTRUST NOMS LTD A/C MEJ01            2,900,000           2,900,000                            
     NORTRUST NOMS LTD A/C MVA01              123,810             123,810                                
     NORTRUST NOMS LTD A/C MVB01               80,027              80,027                                  
     NORTRUST NOMS LTD A/C PUC01               92,400              92,400                                 
     NORTRUST NOMS LTD A/C PUE01                  600                 600                                        
     NORTRUST NOMS LTD A/C PUS01                8,931               8,931                                    
     PRUCLT HSBC GIS NOM(UK) PAC AC         2,208,028           2,208,028                         
     PRUCLT HSBC GIS NOM(UK) PPL AC           758,205             758,205                             
     JNL/M&G GLOBAL BASICS FUND                64,776              64,776                                   
     STATE STREET NOMS                         12,858              12,858                                           
                                                                               
     Total                                                     10,767,850 (5.01%)   

                                                                     
5    Date of the transaction (and date on which the threshold is crossed or    
     reached if different):                                                    
                                                                               
     18 November 2010                                                          
                                                                               
6    Date on which issuer notified:                                            
                                                                               
     19 November 2010                                                          
                                                                               
7    Threshold(s) that is/are crossed or reached:                              
                                                                               
     5%                                                                        
                                                                               
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: below 5%                                                
                                                                               
     Number of voting rights: below 5%                                         
                                                                               
     Resulting situation after the triggering transaction:                     
                                                                               
     Number of shares (direct): 10,796,138                                     
                                                                               
     Number of voting rights (direct): 10,718,504                              
                                                                               
     Number of voting rights (indirect): 77,634                                
                                                                               
     % of voting rights (direct): 4.99%                                        
                                                                               
     % of voting rights (indirect): 0.03%                                      
                                                                               
     Total voting rights: 10,796,138 (5.02%)                                   
                                                                               
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                                                    
                                                                               
     N/A                                                                       
                                                                               
14   Contact Name:                                                             
                                                                               
     Angela Purtill, Deputy Company Secretary, Johnson Matthey plc             
     Contact Telephone Number: 020 7269 8461