Holding(s) in Company

TR-1 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:                                               
                                                                             
    Initial notification due to change of thresholds for non-material interest 
                                                                               
3.  Full name of person(s) subject to the notification obligation:             
                                                                               
    Prudential plc group of companies                                          
                                                                               
4.  Full name of shareholder(s) (if different from 3.):                        
                                                                              
    CHASE NOMINEES LIMITED             5,100,000                               
    M&G INCOME INV CO LTD                 65,382                               
    MAGIM HSBC GIS NOM (UK) SALI          20,728                               
    NORTRUST NOMINEE LTD A/C MHF01        46,581                               
    NORTRUST NOMINEE LTD A/C MHJ01       661,780                               
    NORTRUST NOMINEE LTD A/C MKB01       592,691                               
    NORTRUST NOMINEE LTD A/C MKK01     2,150,613                               
    NORTRUST NOMS LTD                     92,086                               
    NORTRUST NOMS LTD A/C MEJ01        3,800,000                               
    NORTRUST NOMS LTD A/C MVB01           66,463                               
    NORTRUST NOMS LTD A/C PUC01           49,040                               
    NORTRUST NOMS LTD A/C PUF01           19,720                               
    NORTRUST NOMS LTD A/C PUI01            7,882                               
    NORTRUST NOMS LTD A/C PUR01          371,918                               
    NORTRUST NOMS LTD A/C PUS01           13,527                               
    PRUCLT HSBC GIS NOM (UK) PAC AC    2,683,151                               
    PRUCLT HSBC GIS NOM (UK) PHL AC      287,594                               
    PRUCLT HSBC GIS NOM (UK) PPL AC      824,307                               
    PRUCLT HSBC GIS NOM (UK) EQBF AC      10,025                               
    PRUCLT HSBC GIS NOM (UK) HYBF AC      25,212                               
    PRUCLT HSBC GIS NOM (UK) MNBF AC       9,467                               
    PRUCULT HSBC GIS NOM (UK) PENE A/C    38,558                               
    RECOVERY INV COMPANY LIMITED          55,783                               
                                                                              
5.  Date of the transaction (and date on which the threshold is crossed or     
    reached if different):                                                     
  
    20 January 2007                                                            
                                                                               
6.  Date on which issuer notified:                                             
                                                                               
    23 January 2007                                                            
                                                                             
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: 16,992,508                                               
                                                                               
    Number of voting rights: 16,992,508                                        
                                                                               
    Resulting situation after the triggering transaction:                      
                                                                               
    Number of shares (direct): 16,992,508                                      
                                                                               
    Number of voting rights (direct): 16,992,508                               
                                                                               
    % of voting rights (direct): 7.75%                                         
                                                                               
9.  Chain of controlled undertakings through which the voting rights and/or the
    financial instruments are effectively held if applicable:                  
                                                                               
    Prudential plc                    16,992,508 7.75% See 4 above             
    M&G Group Limited                 16,992,508 7.75% See 4 above             
    M&G Investment Management Limited 16,932,400 7.72% See below:              
                                                                               
    CHASE NOMINEES LIMITED             5,100,000                               
    M&G INCOME INV CO LTD                 65,382                               
    MAGIM HSBC GIS NOM (UK) SALI          20,728                               
    NORTRUST NOMINEE LTD A/C MHJ01       661,780                               
    NORTRUST NOMINEE LTD A/C MKB01       592,691                               
    NORTRUST NOMINEE LTD A/C MKK01     2,150,613                               
    NORTRUST NOMS LTD                     92,086                               
    NORTRUST NOMS LTD A/C MEJ01        3,800,000                               
    NORTRUST NOMS LTD A/C MVB01           66,463                               
    NORTRUST NOMS LTD A/C PUC01           49,040                               
    NORTRUST NOMS LTD A/C PUF01           19,720                               
    NORTRUST NOMS LTD A/C PUI01            7,882                               
    NORTRUST NOMS LTD A/C PUR01          371,918                               
    PRUCLT HSBC GIS NOM (UK) PAC AC    2,683,151                               
    PRUCLT HSBC GIS NOM (UK) PHL AC      287,594                               
    PRUCLT HSBC GIS NOM (UK) PPL AC      824,307                               
    PRUCLT HSBC GIS NOM (UK) EQBF AC      10,025                               
    PRUCLT HSBC GIS NOM (UK) HYBF AC      25,212                               
    PRUCLT HSBC GIS NOM (UK) MNBF AC       9,467                               
    PRUCULT HSBC GIS NOM (UK) PENE A/C    38,558                               
    RECOVERY INV COMPANY LIMITED          55,783                               
   
    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:                                                    
                                                                               
    None                                                                       
                                                                               
14. Contact Name:                                                              
                                                                               
    Angela Purtill, Assistant Company Secretary, Johnson Matthey plc           
                                                                               
15. Contact Telephone Number:                                                  
                                                                               
    020 7269 8461