TR-1: Standard form for notification of major holdings

    1a. Identity of the issuer or the underlying                                                 
    issuer of existing shares to which voting                  Oxford Instruments PLC            
    rights are attachedii:                                                                       
                                                                                                 
    1b. Please indicate if the issuer is a non-UK issuer   (please mark with an "X"              
    if appropriate)                                                                              
                                                                                                 
    Non-UK issuer                                                                                
                                                                                                 
    2. Reason for the notification (please mark the appropriate box or boxes with                
    an "X")                                                                                      
                                                                                                 
    An acquisition or disposal of voting rights                                               X  
                                                                                                 
    An acquisition or disposal of financial instruments                                          
                                                                                                 
    An event changing the breakdown of voting rights                                             
                                                                                                 
    Other (please specify)iii:                                                                   
                                                                                                 
    3. Details of person subject to the notification obligationiv                                
                                                                                                 
    Name                                            Ameriprise Financial, Inc. and its group     
                                                                                                 
    City and country of registered office (if       Minneapolis, USA                             
    applicable)                                                                                  
                                                                                                 
    4. Full name of shareholder(s) (if different from 3.)v                                       
                                                                                                 
    Name                                            HSBC Global Custody Nominee (UK) Limited     
                                                    Nortrust Nominees Limited                    
                                                    Securities Services Nominees Limited         
                                                    State Street Bank & Trust Boston             
                                                    State Street Nominees Limited                
                                                    Vidacos Nominees Limited                     
                                                                                                 
    City and country of registered office (if                                                    
    applicable)                                                                                  
                                                                                                 
    5. Date on which the threshold was crossed or   13/11/2017                                   
    reachedvi:                                                                                   
                                                                                                 
    6. Date on which issuer notified (DD/MM/YYYY):  15/11/2017                                   
                                                                                                 
    7. Total positions of person(s) subject to the notification obligation                       
                                                                                                 
                          % of voting     % of voting rights  Total of both in  Total number of  
                        rights attached   through financial     % (8.A + 8.B)   voting rights of 
                       to shares (total      instruments                        issuervii        
                           of 8. A)       (total of 8.B 1 +                                      
                                                8.B 2)                                           
                                                                                                 
    Resulting               14.084%             0.00%              14.084%         57,373,104    
    situation on the                                                                             
    date on which                                                                                
    threshold was                                                                                
    crossed or reached                                                                           
                                                                                                 
    Position of             13.156%             0.00%              13.156%                       
    previous                                                                                     
    notification (if                                                                             
    applicable)                                                                                  
                                                                                                 

       

    8. Notified details of the resulting situation on the date on which the                           
    threshold was crossed or reachedviii                                                              
                                                                                                      
    A: Voting rights attached to shares                                                               
                                                                                                      
    Class/type of        Number of voting rightsix             % of voting rights                     
    shares                                                                                            
    ISIN code (if             Direct            Indirect              Direct             Indirect     
    possible)                (Art 9 of         (Art 10 of       (Art 9 of Directive     (Art 10 of    
                          Directive 2004/  Directive 2004/109/ 2004/109/EC) (DTR5.1)  Directive 2004/ 
                         109/EC) (DTR5.1)    EC) (DTR5.2.1)                               109/EC)     
                                                                                        (DTR5.2.1)    
                                                                                                      
        GB0006650450          38,345            8,042,016             0.067%              14.017%     
                                                                                                      
    SUBTOTAL 8. A                      8,080,361                               14.084%                
                                                                                                      
    B 1: Financial Instruments according to Art. 13(1)(a) of Directive 2004/109/EC                    
    (DTR5.3.1.1 (a))                                                                                  
                                                                                                      
    Type of financial    Expiration Exercise/               Number of voting rights  % of voting      
    instrument           datex      Conversion Periodxi     that may be acquired if  rights           
                                                            the instrument is                         
                                                            exercised/converted.                      
                                                                                                      
                                    SUBTOTAL 8. B 1                                                   
                                                                                                      
    B 2: Financial Instruments with similar economic effect according to Art. 13(1)                   
    (b) of Directive 2004/109/EC (DTR5.3.1.1 (b))                                                     
                                                                                                      
    Type of          Expiration     Exercise/       Physical or cash  Number of      % of voting      
    financial        datex          Conversion      settlementxii     voting rights  rights           
    instrument                      Period xi                                                         
                                                                                                      
                                                    SUBTOTAL 8.B.2                                    
                                                                                                      
                                                                                                      
                                                                                                      
                                                                                                      

       

    9. Information in relation to the person subject to the notification obligation                        
    (please mark the                                                                                       
    applicable box with an "X")                                                                            
                                                                                                           
    Person subject to the notification obligation is not controlled by any natural                         
    person or legal entity and does not control any other undertaking(s) holding                           
    directly or indirectly an interest in the (underlying) issuerxiii                                      
                                                                                                           
    Full chain of controlled undertakings through which the voting rights and/or                 X         
    the                                                                                                    
    financial instruments are effectively held starting with the ultimate                                  
    controlling natural person or legal entityxiv (please add additional rows as                           
    necessary)                                                                                             
                                                                                                           
             Namexv          % of voting rights if it   % of voting rights     Total of both if it         
                             equals or is higher than   through financial      equals or is higher         
                             the notifiable threshold   instruments if it      than the notifiable         
                                                       equals or is higher          threshold              
                                                       than the notifiable                                 
                                                            threshold                                      
                                                                                                           
    Ameriprise Financial,               %                       %                       %                  
    Inc.                                                                                                   
                                                                                                           
    Ameriprise International            %                       %                       %                  
    Holdings GmbH                                                                                          
                                                                                                           
    Threadneedle Asset                  %                       %                       %                  
    Management Holdings SARL                                                                               
                                                                                                           
    Threadneedle Holdings               %                       %                       %                  
    Limited                                                                                                
                                                                                                           
    TAM UK Holdings Limited             %                       %                       %                  
                                                                                                           
    Threadneedle Asset                  %                       %                       %                  
    Management Holdings                                                                                    
    Limited                                                                                                
                                                                                                           
    TC Financing Limited                %                       %                       %                  
                                                                                                           
    Threadneedle Asset               14.084%                    %                    14.084%               
    Management Limited                                                                                     
                                                                                                           
                                                                                                           
                                                                                                           
                                                                                                           
                                                                                                           
    10. In case of proxy voting, please identify:                                                          
                                                                                                           
    Name of the proxy holder                          N/A                                                  
                                                                                                           
    The number and % of voting rights held            N/A                                                  
                                                                                                           
    The date until which the voting rights will be    N/A                                                  
    held                                                                                                   
                                                                                                           
                                                                                                           
                                                                                                           
                                                                                                           
                                                                                                           
                                                                                                           
                                                                                                           
                                                                                                           
                                                                                                           
    11. Additional informationxvi                                                                          
                                                                                                           
                                                                                                           
    Threadneedle Asset Management Limited is wholly owned by TC Financing Limited,                         
    which is itself wholly owned by Threadneedle Asset Management Holdings Limited,                        
    which is itself wholly owned by TAM UK Holdings Limited, which is itself wholly                        
    owned by Threadneedle Holdings Limited, which is itself wholly owned by                                
    Threadneedle Asset Management Holdings SARL, which is itself wholly owned by                           
    Ameriprise International Holdings GmbH, which is itself wholly owned by                                
    Ameriprise Financial, Inc.                                                                             
                                                                                                           
        12 Contact name:                             Susan Johnson-Brett, Oxford Instruments plc           
                                                                                                           
        13. Contact telephone number:                01865 393324                                          
                                                                                                           

    LEI number of Oxford Instruments plc: 213800J364EZD6UCE231

    Classification: Major shareholding notifications