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:            
                                                                               
     FIL Limited                                                               
                                                                               
4    Full name of shareholder(s) (if different from 3.):                       
                                                                               
     FIL Limited (FIL) is the parent holding company for various direct and    
     indirect subsidiaries, including FIL Fund Management Limited (FFML), FIL  
     Investment Services Ltd (FISL), FIL Gastion (FIGEST), FIL Asset Management
     (Korea) Limited (FIAKL), FIL Investments Management (Hong Kong) Limited   
     (FIMHK), FIL Pension Management (FPM), Fidelity Investments Japan (FIJ)   
     and FIL Investments International (FII), investment managers for various  
     non-US investment companies and institutional clients.                    
                                                                               
     SHARES HELD   NOMINEE                        MANAGEMENT COMPANY                                    
                                                                               
     56,400        BANK OF IRELAND (S)            FIL                          
     144,483       BANK OF NEW YORK BRUSSELS      FPM                          
     16,100        BANK OF NEW YORK EUROPE LDN    FIL                          
     592,170       BNP PARIBAS, PARIS             FIGEST                       
     7,800         BNP PARIBAS, PARIS (C)         FIL                          
     6,606,265     Brown Bros Harrimn Ltd Lux     FIL                          
     89,269        Brown Bros Harrimn Ltd Lux(C)  FIL                          
     67,373        Brown Bros Harriman and Co     FIJ                          
     10,800        Chase Manhttn BK AG FRNKFRT(S) FPM                          
     19,100        CITIBANK NA, HONG KONG BR (S)  FIL                          
     1,948,991     JP MORGAN, BOURNEMOUTH         FIL                          
     473,076       JP MORGAN, BOURNEMOUTH (C)     FIL                         
     77,949        KAS BANK NV (S)                FIL                         
     98,000        MASTER TRUST BANK OF JAPAN (C) FIJ                          
     16,300        MELLON BANK NA (S)             FIL                          
     8,600         NORDDEUTSCHE LANDERSBANK       FIL                          
     440,487       NORTHERN TRUST LONDON          FIL                          
     9,700         STATE STR BK AND TR CO LNDN(C) FIL                          
     25,500        STATE STR BK AND TR CO LNDN(S) FIL                          
     53,000        STATE STREET HONG KONG         FIA(K)L                                     
                                                                               
5    Date of the transaction (and date on which the threshold is crossed or    
     reached if different):                                                    
                                                                               
     11 November 2010                                                          
                                                                               
6    Date on which issuer notified:                                            
                                                                               
     15 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: 10,719,533                                              
                                                                               
     Number of voting rights: 10,719,533                                       
                                                                               
     Resulting situation after the triggering transaction:                     
                                                                               
     Number of shares (direct): 10,761,363                                     
                                                                               
     Number of voting rights (direct):                                         
                                                                               
     Number of voting rights (indirect): 10,761,363                            
                                                                               
     % of voting rights (direct):                                              
                                                                               
     % of voting rights (indirect): 5.01                                       
                                                                               
     Total voting rights: 10,761,363 (5.01%)                                   
                                                                               
9    Chain of controlled undertakings through which the voting rights and/or   
     the financial instruments are effectively held if applicable:             
                                                                               
     See 4 above.                                                              
                                                                               
     PROXY VOTING:                                                             
                                                                               
10   Name of the proxy holder:                                                 
                                                                               
     FIL Limited                                                               
                                                                               
11   Number of voting rights proxy holder will acquire:                        
                                                                               
     41,830                                                                    
                                                                               
12   Date on which proxy holder will acquire voting rights:                    
                                                                               
     11 November 2010                                                          
                                                                               
13   Additional Information                                                    
                                                                               
     None                                                                      
                                                                               
14   Contact Name:                                                             
                                                                               
     Angela Purtill, Deputy Company Secretary, Johnson Matthey plc             
     Contact Telephone Number: 020 7269 8461