Bioventix plc                                 

                            ("Bioventix" or the "Company")                         

                              Director/PDMR Shareholding                           

    Bioventix plc (BVXP), a UK company specialising in the development and
    commercial supply of high-affinity monoclonal antibodies for application in
    clinical diagnostics, was notified on 19 October 2017 of the following
    transactions in its ordinary shares of 5 pence each ("Ordinary Shares"):

    Director                Position        Ordinary  Sale price     Ordinary   Percentage
                                              Shares         per  Shares held    of issued
                                                sold    Ordinary subsequently        share
                                                           Share              capital held
                                                                              subsequently
                                                                                          
    Ian Nicholson and       Non-Executive      5,000    2400.75p       18,000         0.4%
    Persons Closely         Chairman                                                      
    Associated                                                                            
                                                                                          
    Peter Harrison and      CEO               80,000    2425.00p      428,176         8.3%
    Persons Closely                                                                       
    Associated                                                                            

       Notification and public disclosure of transactions by persons discharging   
         managerial responsibilities and persons closely associated with them      

             Details of the person discharging managerial responsibilities /      
             person closely associated                                            
                                                                                  
    a)       Names                   Ian Nicholson (Non-Executive Chairman)       
                                     Catherine Nicholson (PCA with Ian Nicholson) 
                                     Peter Harrison (CEO)                         
                                                                                  
             Reason for the Notification                                          
                                                                                  
    a)       Position/status         See 1(a) above, all are PDMR's or PCA's of   
                                     PDMR's                                       
                                                                                  
    b)       Initial notification/   Initial notification                         
             Amendment                                                            
                                                                                  
             Details of the issuer, emission allowance market participant, auction
             platform, auctioneer or auction monitor                              
                                                                                  
    a)       Name                    Bioventix plc                                
                                                                                  
    b)       LEI                     213800225MHX7LZQY108                         
                                                                                  
             Details of the transaction(s): section to be repeated for (i) each   
             type of instrument; (ii) each type of transaction; (iii) each date;  
             and (iv) each place where transactions have been conducted           
                                                                                  
    a)       Description of the      Ordinary shares of 5 pence ("Ordinary        
             Financial instrument,   Shares")                                     
             type of instrument                                                   
                                                                                  
             Identification code     GB00B4QVDF07                                 
                                                                                  
    b)       Nature of the           In each case, sale of Ordinary Shares        
             transaction                                                          
                                                                                  
    c)       Price(s) and volume(s)  Ian Nicholson:                               
                                                                                  
                                     Price(s)              Volume(s)              
                                                                                  
                                     2400.75p              2,500                  
                                                                                  
                                     Catherine Nicholson:                         
                                                                                  
                                     Price(s)              Volume(s)              
                                                                                  
                                     2400.75p              2,500                  
                                                                                  
                                     Peter Harrison:                              
                                                                                  
                                     Price(s)              Volume(s)              
                                                                                  
                                     2425.00p              80,000                 
                                                                                  
    d)       Aggregated information: See 4(c)                                     
                                                                                  
    e)       Date of the transaction 19 October 2017                              
                                                                                  
    f)       Place of the            London Stock Exchange, AIM Market (XLON)     
             transaction                                                          

    For further information please contact:

    Bioventix plc                                     Tel: 01252 728 001     
    Peter Harrison           Chief Executive Officer                         
                                                                             
    finnCap Ltd                                       Tel: 020 7220 0500     
    Geoff Nash/Simon Hicks   Corporate Finance                               
    Stephen Norcross         Corporate Broking                               

    About Bioventix plc:

    Bioventix (www.bioventix.com) specialises in the development and commercial
    supply of high-affinity monoclonal antibodies with a primary focus on their
    application in clinical diagnostics, such as in automated immunoassays used in
    blood testing. The antibodies created at Bioventix are generated in sheep and
    are of particular benefit where the target is present at low concentration and
    where conventional monoclonal or polyclonal antibodies have failed to produce a
    suitable reagent. Bioventix currently offers a portfolio of antibodies to
    customers for both commercial use and R&D purposes, for the diagnosis or
    monitoring of a broad range of conditions, including heart disease, cancer,
    fertility, thyroid function and drug abuse. Bioventix currently supplies
    antibody products and services to the majority of multinational clinical
    diagnostics companies. Bioventix is based in Farnham, UK and its shares are
    traded on AIM under the symbol BVXP.