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:            
                                                                               
     Legal & General Group Plc (L&G)                                           
                                                                               
4    Full name of shareholder(s) (if different from 3.):                       
                                                                               
     Legal & General Assurance (Pensions Management) Limited (PMC)             
                                                                               
5    Date of the transaction (and date on which the threshold is crossed or    
     reached if different):                                                    
                                                                               
     1 June 2009                                                               
                                                                               
6    Date on which issuer notified:                                            
                                                                               
     3 June 2009                                                               
                                                                               
7    Threshold(s) that is/are crossed or reached:                              
                                                                               
     From 4% - 3% (L&G)                                                        
                                                                               
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: 8,585,499                                               
                                                                               
     Number of voting rights: 8,585,499                                        
                                                                               
     Resulting situation after the triggering transaction:                     
                                                                               
     Number of shares (direct): 8,841,579                                      
                                                                               
     Number of voting rights (direct): 8,841,579                               
                                                                               
     Number of voting rights (indirect):                                       
                                                                               
     % of voting rights (direct): 4.11%                                        
                                                                               
     % of voting rights (indirect):                                            
                                                                               
     Total voting rights: 8,841,579 (4.11%)                                    
                                                                               

9 Chain of controlled undertakings through                                     
which the voting rights and/or the financial                                   
instruments are effectively held if                                            
applicable:                                                                    
                                                                               
Legal & General Group Plc (Direct and                                          
Indirect) (Group)                                                              
                                                                               
Legal & General Investment Management                                          
(Holdings) Limited (LGIMH) (Direct and                                         
Indirect)                                                                      
                                                                               
Legal & General Investment Management                                          
Limited (Indirect) (LGIM)                                                      
                                                                               
Legal & General Group Plc (Direct) (L&G) (8,841,579 - 4.11% = LGAS, LGPL & PMC)
                                                                               
Legal & General Investment Management        Legal & General Insurance Holdings
(Holdings) Limited (Direct) (LGIMHD)         Limited (Direct) (LGIH)           
(8,083,126 - 3.76% = PMC)                                                      
                                                                               
Legal & General Assurance (Pensions          Legal & General Assurance Society 
Management) Limited (PMC) (8,083,126 - 3.76% Limited (LGAS & LGPL)             
= PMC)                                                                         
                                                                               
                                             Legal & General Pensions Limited  
                                            (Direct) (LGPL)                   

     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:                                                   
                                                                               
     Notification using the total voting rights figure of 214,675,736          
                                                                               
14   Contact Name:                                                             
                                                                               
     Angela Purtill, Deputy Company Secretary, Johnson Matthey plc             
                                                                               
     Contact Telephone Number:                                                 
                                                                               
     020 7269 8461