| Not the only one 
 
 
 
 
   January 16, 2018 01:01 ET                                       | Source:  Ablynx NV
 multilang-release
 
 REGULATED INFORMATION
 
 GHENT, Belgium, 16 January 2018 - Ablynx [Euronext Brussels and Nasdaq: ABLX]  today announced, in accordance with Article 14 of the Belgian Law of 2  May 2007 regarding the publication of major shareholdings in issuers  whose securities are admitted to trading on a regulated market (the  "Transparency Law"), that it received a notification of shareholdings  from Marshall Wace LLP on 12 January 2018.
 
 Marshall  Wace LLP notified Ablynx that as a result of an acquisition of voting  securities, it has crossed the 3% threshold on 8 January 2018 and now  holds 2,251,187 voting securities of Ablynx, representing 3.01% of the  current 74,720,644 outstanding voting rights of Ablynx.
 
 The notification contains the following information:
 
 Reason for the notification: acquisition or disposal of voting securities or voting rights  Notification by: a person that notifies alone  Persons subject to the notification requirement: Marshall Wace LLP  Transaction date: 8 January 2018  Threshold that is crossed: 3%  Denominator: 74,720,644  Details of the notification: Marshall Wace LLP holds 2,251,187 Ablynx shares with voting rights
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