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:     
                                                                               
          L C Pentz                                                            
                                                                               
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 director 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 holdings 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:                                      
                                                                               
          L C Pentz                                                            
                                                                               
8.        State the nature of the transaction:                                 
                                                                               
          Exercise of executive share options and subsequent disposal of       
          shares. Details are as follows:                                      

          Ordinary       Date of Grant     Exercise      Number     Sale Price
          Shares under                     Price(£)      Disposed   (£)       
          option                                                      
                                                            
          12,952         18/07/2001        10.83         12,952     17.635    

9.        Number of shares, debentures or financial instruments relating to   
          shares acquired:                                                    
                                                                               
          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:                                                    
                                                                               
          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:                            
                                                                               
          See 8 above                                                         
                                                                               
14.       Date and place of transaction:                                      
                                                                               
          16 September 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):                 
                                                                               
          L C Pentz - 101,530 ordinary shares of £1 each                      
                                                                               
16.       Date issuer informed of transaction:                                
                                                                              
          17 September 2010                                                   
                                                                               

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

Angela Purtill
Deputy Company Secretary

Date of Notification
17 September 2010