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:             
                                                                                    
         Ameriprise Financial, Inc. and its group                                   
                                                                                    
    4    Full name of shareholder(s) (if different from 3.):                        
                                                                                    
         (1) Threadneedle Asset Management Limited                                  
                                                                                    
         (2) Columbia Management Investment Advisers, LLC                           
                                                                                    
    5    Date of the transaction (and date on which the threshold is crossed or     
         reached if different):                                                     
                                                                                    
         27 August 2015                                                             
                                                                                    
    6    Date on which issuer notified:                                             
                                                                                    
         1 September 2015                                                           
                                                                                    
    7    Threshold(s) that is/are crossed or reached:                               
                                                                                    
         Above the threshold of 5%                                                  
                                                                                    
    8    Notified details:                                                          
                                                                                    
         VOTING RIGHTS ATTACHED TO SHARES:                                          
                                                                                    
         Class/type of shares (if possible using the ISIN CODE):                    
                                                                                    
         GB00B70FPS60                                                               
                                                                                    
         US4791424082                                                               
                                                                                    
         Situation previous to the triggering transaction:                          
                                                                                    
         Number of shares: N/A                                                      
                                                                                    
         Number of voting rights: N/A                                               
                                                                                    
         Resulting situation after the triggering transaction:                      
                                                                                    
         Number of shares (direct): 128,750 (GB00B70FPS60)                          
                                                                                    
         Number of voting rights (direct): 128,750 (GB00B70FPS60)                   
                                                                                    
         Number of voting rights     10,122,503 (GB00B70FPS60)                      
         (indirect):                               216 (US4791424082)               
                                                                                    
         % of voting rights (direct): 0.063% (GB00B70FPS60)                         
                                                                                    
         % of voting rights (indirect): 4.940% (GB00B70FPS60)                       
                                                                                    
         Total voting rights: 10,251,469 (5.003%)                                   
                                                                                    
    9    Chain of controlled undertakings through which the voting rights and/or the
         financial instruments are effectively held if applicable:                  
                                                                                    
         Columbia Management Investment Advisers, LLC (0.119%)                      
                                                                                    
         Threadneedle Asset Management Limited (4.884%)                             
                                                                                    
         Columbia Management Investment Advisers, LLC is wholly owned by Ameriprise 
         Financial, Inc.                                                            
                                                                                    
         Threadneedle Asset Management Limited is wholly owned by TC Financing      
         Limited, which is itself wholly owned by Threadneedle Asset Management     
         Holdings Limited, which is itself wholly owned by TAM UK Holdings Limited, 
         which is itself wholly owned by Threadneedle Holdings Limited,  which is   
         itself wholly owned by Threadneedle Asset Management Holdings SARL, which  
         is itself wholly owned by Ameriprise International Holdings GmbH, which is 
         itself wholly owned by Ameriprise Financial, Inc.                          
                                                                                    
         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                                                     
                                                                                    
         The Shares referred to in section 9 of this form are held in portfolios and
         funds managed on a discretionary basis by the entities set out in section  
         4.                                                                         
                                                                                    
         Please note that the Shares are held through certain nominee companies.    
                                                                                    
    14   Contact Name:                                                              
                                                                                    
         Angela Purtill, Deputy Company Secretary, Johnson Matthey plc              
                                                                                    
    15   Contact Telephone Number:                                                  
                                                                                    
         020 7269 8461                                                              
                                                                                    
         2 September 2015