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 DR 3.1.4(R)(1)(a); or (ii) DR 3.1.4 (R)(1)(b) a disclosure 
    made in accordance with section 324 (as extended by section 328) of the    
    Companies Act 1985 or (iii) both (i) and (ii):                             
                                                                               
     (i)                                                                       
                                                                               
3.  Name of person discharging managerial responsibilities/director:           
                                                                               
    F K Sheffy                                                                 
                                                                               
4.  State whether notification relates to a person connected with a person     
    discharging managerial responsibilities/director named in 3 and identify   
    the connected person:                                                      
                                                                               
    No                                                                         
                                                                               
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:    
                                                                               
    In respect of 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:                                               
                                                                               
    T Rowe Price Trust as Trustee of the Johnson Matthey Salaried Employees    
    Savings Investment Plan                                                    
                                                                               
8.  State the nature of the transaction:                                       
                                                                               
    Regular purchase of shares by the Trustee of the Johnson Matthey Salaried  
    Employees Savings Investment Plan                                          
                                                                               
9.  Number of shares, debentures or financial instruments relating to shares   
    acquired:                                                                  
                                                                               
    16 April 2007  17 Ordinary Shares of £1 each                               
    2 May 2007     17 Ordinary Shares of £1 each                               
    15 May 2007    17 Ordinary Shares of £1 each                               
    29 May 2007    17 Ordinary Shares of £1 each                               
    13 June 2007   16 Ordinary Shares of £1 each                               
    27 June 2007   16 Ordinary Shares of £1 each                               
    12 July 2007   15 Ordinary Shares of £1 each                               
    24 July 2007   15 Ordinary Shares of £1 each                               
    7 August 2007  16 Ordinary Shares of £1 each                               
                                                                               
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:                                                                  
                                                                               
    N/A                                                                        
                                                                               
12. Percentage of issued class disposed (treasury shares of that class should  
    not be taken into account when calculating percentage):                    
                                                                               
    N/A                                                                        
                                                                               
13. Price per share or value of transaction:                                   
                                                                              
    16 April 2007  £16.27                                                      
    2 May 2007     £15.63                                                      
    15 May 2007    £15.82                                                      
    29 May 2007    £15.71                                                      
    13 June 2007   £16.53                                                      
    27 June 2007   £16.91                                                      
    12 July 2007   £17.59                                                      
    24 July 2007   £17.69                                                      
    7 August 2007  £16.66                                                      
                                                                               
14. Date and place of transaction:                                             
                                                                               
    See above dates. All transactions took place in 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):                                      
                                                                               
16. Date issuer informed of transaction:                                       
                                                                               
    10 August 2007                                                             
                                                                               
17. Date of grant:                                                             
                                                                               
18. Period during which or date on which it can be exercised:                  
                                                                               
19. Total amount paid (if any) for grant of the option:                        
                                                                               
20. Description of shares or debentures involved (class and number):           
                                                                               
21. Exercise price (if fixed at time of grant) or indication that price is to  
    be fixed at the time of exercise:                                          
                                                                               
22. Total number of shares or debentures over which options held following     
    notification:                                                              
                                                                               
23. Any additional information:                                                
                                                                               
24. Name of contact and telephone for queries:                                 
                                                                               
    Angela Purtill, Assistant Company Secretary                                
    020 7269 8461                                                              

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

Angela Purtill

Date of Notification:

14 August 2007