REGULATED INFORMATION

PUBLICATION IN ACCORDANCE WITH ARTICLE 14 OF THE BELGIAN LAW OF 2 MAY 2007 REGARDING THE PUBLICATION OF MAJOR SHAREHOLDINGS (THE "TRANSPARENCY LAW") GHENT, Belgium, 29 November 2017 - 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 Millennium Group Management LLC on 27 November 2017.

Millennium Group Management LLC notified Ablynx that it has crossed downward the lowest threshold on 21 November 2017.

The notification contains the following information:

  • Reason for the notification: acquisition or disposal of voting securities or voting rights; downward crossing of the lowest threshold
  • Notification by: a parent undertaking or a controlling person
  • Persons subject to the notification requirement: Millennium Group Management LLC
  • Date on which threshold is crossed: 21 November 2017
  • Threshold that is crossed: 3%
  • Denominator: 74,720,644
  • Details of the notification: - (no details required when downward crossing the lowest threshold)
  • Chain of controlled undertakings through which the holding is effectively being held: Millennium International Management LP and Integrated Core Strategies (Europe) Sarl are ultimately controlled by Millennium Group Management LLC.
  • Additional information: Millennium International Management LP is a discretionary investment manager of various trading vehicles that can exercise the voting rights at its discretion in the absence of specific instructions.

More information is provided in the transparency notification. Full versions of the transparency notifications are available on Ablynx website, under the section Investors.

The Articles of the Association of Ablynx NV provide for shareholders notification threshold of 3%, 5% or a multiple of 5% of the total number of existing voting rights.

About Ablynx

Ablynx is a biopharmaceutical company engaged in the development of Nanobodies, proprietary therapeutic proteins based on single-domain antibody fragments, which combine the advantages of conventional antibody drugs with some of the features of small-molecule drugs. Ablynx is dedicated to creating new medicines which will make a real difference to society. Today, the Company has more than 45 proprietary and partnered programmes in development in various therapeutic areas including inflammation, haematology, immuno-oncology, oncology and respiratory disease. The Company has collaborations with

multiple pharmaceutical companies including AbbVie; Boehringer Ingelheim; Eddingpharm; Merck & Co., Inc., Kenilworth, New Jersey, USA; Merck KGaA; Novartis; Novo Nordisk; Sanofi and Taisho Pharmaceuticals. The Company is headquartered in Ghent, Belgium. More information can be found on www.ablynx.com.

For more information, please contact:

Ablynx

Dr Edwin Moses CEO

t: +32 (0)9 262 00 07

m: +32 (0)473 39 50 68

e: edwin.moses@ablynx.com

Lies Vanneste Director IR

t: +32 (0)9 262 0137

m: +32 (0)498 05 35 79

e: lies.vanneste@ablynx.com

@AblynxABLX

Ablynx media relations: Consilium Strategic Communications

Mary-Jane Elliott, Philippa Gardner, Sukaina Virji t: +44 (0)20 3709 5700

e: ablynx@consilium-comms.com

Disclaimer

Certain statements, beliefs and opinions in this press release are forward-looking, which reflect the Company or, as appropriate, the Company directors' current expectations and projections about future events. By their nature, forward-looking statements involve a number of risks, uncertainties and assumptions that could cause actual results or events to differ materially from those expressed or implied by the forward-looking statements. These risks, uncertainties and assumptions could adversely affect the outcome and financial effects of the plans and events described herein. A multitude of factors including, but not limited to, changes in demand, competition and technology, can cause actual events, performance or results to differ significantly from any anticipated development. Forward looking statements contained in this press release regarding past trends or activities should not be taken as a representation that such trends or activities will continue in the future. As a result, the Company expressly disclaims any obligation or undertaking to release any update or revisions to any forward-looking statements in this press release as a result of any change in expectations or any change in events, conditions, assumptions or circumstances on which these forward-looking statements are based. Neither the Company nor its advisers or representatives nor any of its parent or subsidiary undertakings or any such person's officers or employees guarantees that the assumptions underlying such forward-looking statements are free from errors nor does either accept any responsibility for the future accuracy of the forward-looking statements contained in this press release or the actual occurrence of the forecasted developments. You should not place undue reliance on forward-looking statements, which speak only as of the date of this press release.

Ablynx NV published this content on 29 November 2017 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 29 November 2017 06:57:05 UTC.

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