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 A P Carson                                                         
                                                                               
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 person named in 3 above                      
                                                                               
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 104 16/21 pence each                               
                                                                               
7.        Name of registered shareholders(s) and, if more than one, the number 
          of shares held by each of them:                                      
                                                                               
          N A P Carson                                                         
                                                                               
8.        State the nature of the transaction:                                 
                                                                               
          Exercise of executive share options and subsequent disposal of       
          shares. Details are as follows:                                      

          Ordinary Shares   Date of Grant  Exercise   Number    Sale Price 
          under option                     Price (£)  Disposed  (£)        
                                                                               
          59,481            26 July 2006   12.82      59,481    25.64      

          Under the Johnson Matthey share option scheme rules, the pre-tax gain
          made on the exercise of share options granted in 2006 is capped      
          at 100% of the grant price (£12.82). A share price of £25.64 would   
          deliver the maximum gain. Johnson Matthey has put in place an        
          automated process for the exercise of 2006 share options which means 
          that, provided the participant has consented, options are            
          automatically exercised when the share price reaches £25.64. Mr      
          Carson consented to take part in this automated process. Accordingly,
          his options were exercised on 14 September 2012 at £25.64.           

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):      
                                                                               
          N/A                                                                 
                                                                               
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:                                      
                                                                               
          14 September 2012, 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):                 
                                                                               
          213,085 Ordinary Shares of 104 16/21 pence each                      
                                                                               
16.       Date issuer informed of transaction:                                
                                                                               
          17 September 2012                                                   
                                                                               

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

Angela Purtill
Deputy Company Secretary

Date of Notification
17 September 2012