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:     
                                                                               
    G P Otterman                                                         
                                                                               
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:                                      
                                                                               
    G P Otterman                                                         
                                                                               
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  Sale Price
                       under option                     Price (£) (£)       
                                                                  
    G P Otterman       2,114             19/07/2000     9.42      15.530998 

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:                                      
                                                                               
    9 July 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:                                
                                                                               
    12 July 2010                                                        
                                                                               

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

Angela Purtill
Deputy Company Secretary

Date of Notification
13 July 2010