Director/PDMR Shareholding

NOTIFICATION OF TRANSACTIONS OF DIRECTORS/PERSONS DISCHARGING MANAGERIAL
RESPONSIBILITIES AND CONNECTED PERSONS

1.        Name of the issuer:                                                  
                                                                               
          Johnson Matthey plc                                                  
                                                                               
2.        State whether the notification relates to (i) a transaction notified 
          in accordance with DTR 3.1.2 R, (ii) a disclosure made in accordance 
          with LR 9.8.6R(1) or (iii) a disclosure made in accordance with      
          section 793 of the Companies Act (2006):                             
                                                                               
          In accordance with DTR 3.1.2R                                        
                                                                               
3.        Name of person discharging managerial responsibilities/director:     
                                                                               
          N Whitley                                                            
                                                                               
4.        State whether notification relates to a person connected with a      
          person discharging managerial responsibilities/director named in 3   
          and identify the connected person:                                   
                                                                               
          Notification relates to the person named in 3                        
                                                                               
5.        Indicate whether the notification is in respect of a holding of the  
          person referred to in 3 or 4 above or in respect of a non-beneficial 
          interest:                                                            
                                                                               
          Notification is in respect of a holding of the person named in 3     
          above                                                                
                                                                               
6.        Description of shares (including class), debentures or derivatives or
          financial instruments relating to shares:                            
                                                                               
          Ordinary Shares of £1 each                                           
                                                                               
7.        Name of registered shareholders(s) and, if more than one, the number 
          of shares held by each of them:                                      
                                                                               
          N Whitley                                                            
                                                                               
8.        State the nature of the transaction:                                 
                                                                               
           i. Sale of 1,176 shares at a sale price of £17.26 from the Johnson  
              Matthey Share Incentive Plan; and                                
                                                                               
          ii. Exercise of executive share options and subsequent disposal of  
              shares. Details are as follows:                                      

              Ordinary Shares under    Date of Grant  Exercise   Sale Price   
              option                                  Price (£)  (£)          
                                                                
              3,858                    20/07/2005     10.70      17.22        
              1,691                    26/07/2006     12.82      17.16        

9.         Number of shares, debentures or financial instruments relating to   
           shares acquired:                                                    
                                                                               
            i. See 8 above                                                     
           ii. See 8 above                                                    
                                                                               
10.        Percentage of issued class acquired (treasury shares of that class  
           should not be taken into account when calculating percentage):      
                                                                               
           Less than 0.1%                                                      
                                                                               
11.        Number of shares, debentures or financial instruments relating to   
           shares disposed:                                                    
                                                                               
            i. See 8 above                                                     
           ii. See 8 above                                                    
                                                                               
12.        Percentage of issued class disposed (treasury shares of that class  
           should not be taken into account when calculating percentage):      
                                                                               
           Less than 0.1%                                                      
                                                                               
13.        Price per share or value of transaction:                            
                                                                               
            i. See 8 above                                                     
           ii. See 8 above                                                    
                                                                               
14.        Date and place of transaction:                                      
                                                                               
           6 August 2010, London                                               
                                                                               
15.        Total holding following notification and total percentage holding   
           following notification (any treasury shares of that class should not
           be taken into account when calculating percentage):                 
                                                                               
           N/A                                                                 
                                                                               
16.        Date issuer informed of transaction:                                
                                                                               
           9 August 2010                                                       
                                                                               

Name and signature of duly authorised officer of issuer responsible for making
notification

Angela Purtill
Deputy Company Secretary

Date of Notification
10 August 2010