Holding(s) in Company

For filings with the FSA include the annex                                                
                                                                                          
For filings with issuer exclude the annex                                                 
                                                                                          
                                                                                          
                                                                                          
TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi                                           
                                                                                          
                                                                                          
                                                                                          
1. Identity of the issuer or the underlying issuer                    Oxford Instruments  
of existing shares to which voting rights are                                 PLC         
attached:ii                                                                               
                                                                                          
2 Reason for the notification :                 
                                                                                          
An acquisition or disposal of voting rights                                               
                                                                                        
                                                                                            
3. Full name of person(s) subject to the                             BlackRock, Inc.      
notification obligation:iii                                                               
                                                                                          
4. Full name of shareholder(s)                                                            
 (if different from 3.):iv                                                                
                                                                                          
5. Date of the transaction and date on                                                    
which the threshold is crossed or                                   8th September 2011    
reached:v                                                                                 
                                                                                          
6. Date on which issuer notified:                                  12th September 2011    
                                                                                          
7. Threshold(s) that is/are crossed or                          Holding has gone above 16%
reached: vi, vii                                                                          
                                                                                          


 

8. Notified details:                                                                                   
                                                                                                       
A: Voting rights attached to shares viii, ix                                                           
                                                                                                       
Class/type   Situation previous                   Resulting situation after the triggering transaction 
of           to the triggering                                                                         
shares       transaction                                                                               
                                                                                                       
             Number                 Number        Number   Number of voting        % of  voting rights 
if possible  of                     of            of       rights                  x                   
using        Shares                 Voting        shares                                               
the ISIN                            Rights                                                             
CODE                                              Direct   Direct xi Indirect xii  Direct  Indirect    
                                                                                                       
GB0006650450       6,049,977          6,049,977   N/A      N/A       6,597,937     N/A     11.95%      
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
B: Qualifying Financial Instruments                                                                    
                                                                                                       
Resulting situation after the triggering transaction                                                   
                                                                                                       
Type of        Expiration            Exercise/              Number of voting             % of voting   
financial      date xiii             Conversion Period xiv  rights that may be           rights        
instrument                                                  acquired if the                            
                                                            instrument is                              
                                                            exercised/ converted.                      
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
C: Financial Instruments with similar economic effect to Qualifying Financial                          
Instruments xv, xvi                                                                                    
                                                                                                       
Resulting situation after the triggering transaction                                                   
                                                                                                       
Type of       Exercise price        Expiration  Exercise/  Number of voting rights    % of voting      
financial                           date xvii   Conversion instrument refers to       rights xix, xx   
instrument                                      period                                                 
                                                xviii                                                  
                                                                                                       
                                                                                      Nominal Delta      
CFD                                                        2,250,191                                   
                                                                                      4.08% 4.08%      
                                                                                                       
                                                                                                       
                                                                                                       
Total (A+B+C)                                                                                          
                                                                                                       
Number of voting rights                                  Percentage of voting rights                   
                                                                                                       
8,848,128                                                16.03%                                        
                                                                                                       


 

9. Chain of controlled undertakings through which the voting rights and/or the          
financial instruments are effectively held, if applicable: xxi                          
                                                                                        
                                                                                        
                                                                                        
BlackRock Investment Management (UK) Limited -  8,848,128 (16.03%)                      
                                                                                        
                                                                                        
                                                                                        
                                                                                        
                                                                                        
                                                                                        
                                                                                        
Proxy Voting:                                                                           
                                                                                        
10. Name of the proxy holder:                                                           
                                                                                        
11. Number of voting rights proxy holder will cease                                     
to hold:                                                                                
                                                                                        
12. Date on which proxy holder will cease to hold                                       
voting rights:                                                                          
                                                                                        
                                                                                        
                                                                                        
                                                         Oxford Instruments plc         
13. Additional information:                                                             
                                                                                        
14. Contact name:                                Susan Johnson-Brett (Company Secretary)
                                                                                        
15. Contact telephone number:                                 01865 393 324             
                                                                                        


 

Note: Annex should only be submitted to the FSA not the issuer                          
                                                                                        
Annex: Notification of major interests in sharesxxii                                    
                                                                                        
                                                                                        
                                                                                        
A: Identity of the persons or legal entity subject to the notification                  
obligation                                                                              
                                                                                        
Full name                                                                               
                                                                                        
(including legal form of legal entities)                                                
                                                                                        
                                                                                        
                                                                                        
Contact address                                                                         
                                                                                        
(registered office for legal entities)                                                  
                                                                                        
                                                                                        
                                                                                        
Phone number & email                                                                    
                                                                                        
                                                                                        
                                                                                        
Other useful information                                                                
                                                                                        
(at least legal representative for legal persons)                                       
                                                                                        
                                                                                        
                                                                                        
                                                                                        
                                                                                        
B: Identity of the notifier, if applicable                                              
                                                                                        
Full name                                                                               
                                                                                        
                                                                                        
                                                                                        
Contact address                                                                         
                                                                                        
                                                                                        
                                                                                        
Phone number & email                                                                    
                                                                                        
                                                                                        
                                                                                        
Other useful information                                                                
                                                                                        
(e.g. functional relationship with the person or legal entity subject to the            
notification obligation)                                                                
                                                                                        
                                                                                        
                                                                                        
C: Additional information                                                               
                                                                                        
                                                                                        
                                                                                        
For notes on how to complete form TR-1 please see the FSA website.