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:            
                                                                               
     Ameriprise Financial, Inc. and its group                                  
                                                                               
4    Full name of shareholder(s) (if different from 3.):                       
                                                                               
     See additional information under 13                                       
                                                                               
5    Date of the transaction (and date on which the threshold is crossed or    
     reached if different):                                                    
                                                                               
     26 October 2011                                                           
                                                                               
6    Date on which issuer notified:                                            
                                                                               
     28 October 2011                                                           
                                                                               
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):                   
                                                                               
     Ordinary £1 Share                                                         
                                                                               
     GB0004764071                                                              
                                                                               
     US4791423092                                                              
                                                                               
     Situation previous to the triggering transaction:                         
     (The following answers are in respect of GB0004764071 unless otherwise    
     stated)                                                                   
                                                                               
     Number of shares: N/A                                                     
                                                                               
     Number of voting rights: N/A                                              
                                                                               
     Resulting situation after the triggering transaction:                     
                                                                               
     Number of shares (direct): 264,202                                        
                                                                               
     Number of voting rights (direct): 264,202                                 
                                                                               
     Number of voting rights (indirect): 10,512,731 (plus 249 in respect of    
     US4791423092)                                                             
                                                                               
     % of voting rights (direct): 0.123%                                       
                                                                               
     % of voting rights (indirect): 4.897%                                     
                                                                               
     Total voting rights: 10,777,182 (5.02%)                                   
                                                                               
9    Chain of controlled undertakings through which the voting rights and/or   
     the financial instruments are effectively held if applicable:             
                                                                               
     Ameriprise Financial, Inc., which through intermediate holding companies  
     controls the voting rights of Columbia Management Investment Advisers,    
     Columbia Wanger Asset Management, Threadneedle Management Luxembourg S.A. 
     and Threadneedle Asset Management Holdings Ltd, which itself controls the 
     voting rights of Threadneedle Asset Management Ltd, Threadneedle          
     International Ltd and Threadneedle Pensions Ltd.                          
                                                                               
     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                                                    
                                                                               
     Registered Owner                                                          
                                                                               
     Littledown Nominees Ltd                      A/C ZLA08        16,674                                   
     Ameriprise Financial Inc                     A/C             165,700                                     
     Royal Trust Corp of Canada                   A/C 719306       46,215                              
     HSBC Global Custody Nominees (UK) Ltd        A/C 2456820      31,655                  
     Columbia Management Investment Advisers LLC  A/C                 659                       
     State Street Nominees Limited                A/C XC7N        203,138                            
     Chase Nominees Ltd                           A/C 75102        22,000                                       
     KDTC KAS Depositary Trust Company            A/C 223700533    86,752                    
     Harewood Nominees Ltd                        A/C 1040411926G 175,988                             
     William & Glyns (Isle of Man) Nominees Ltd   A/C 301780       39,934               
     Littledown Nominees Ltd                      A/C ZLA01        60,000                                  
     Littledown Nominees Ltd                      A/C ZLA03     4,218,272                               
     Littledown Nominees Ltd                      A/C 07198       236,433                                
     Littledown Nominees Ltd                      A/C 27642        27,769                                  
     Littledown Nominees Ltd                      A/C 10478         5,436                                   
     Littledown Nominees Ltd                      A/C ZLA09        10,073                                  
     Littledown Nominees Ltd                      A/C 10479         5,502                                   
     Littledown Nominees Ltd                      A/C ZLA12       219,045                                 
     Littledown Nominees Ltd                      A/C ZLA14        59,829                                  
     Littledown Nominees Ltd                      A/C 07207       464,127                                 
     Littledown Nominees Ltd                      A/C 07196        19,950                                 
     Littledown Nominees Ltd                      A/C 07199        16,267                                  
     Mellon Nominees (UK) Ltd                     A/C WWSF0004002 165,120                          
     Littledown Nominees Ltd                      A/C 18667        84,533                                  
     Littledown Nominees Ltd                      A/C 10469       127,108                                 
     Littledown Nominees Ltd                      A/C 18668       116,670                                 
     Littledown Nominees Ltd                      A/C 10496       722,905                                 
     Littledown Nominees Ltd                      A/C 10492       356,060                                 
     Littledown Nominees Ltd                      A/C 10491     1,022,562                               
     Littledown Nominees Ltd                      A/C 10488     1,090,909                               
     Littledown Nominees Ltd                      A/C 10495       135,000                                 
     Littledown Nominees Ltd                      A/C 10489       237,357                                 
     Littledown Nominees Ltd                      A/C 30337        20,000                                  
     Littledown Nominees Ltd                      A/C ZLA15       567,291                                
     Columbia Management Investment Advisers LLC  A/C                 249                       
                                                                               


     Contact Name:                                                            
     Angela Purtill, Deputy Company Secretary, Johnson Matthey plc             
                                                                               
     Contact Telephone Number: 020 7269 8461