REGULATED INFORMATION

ABLYNX AND SANOFI ENTER INTO A STRATEGIC COLLABORATION TO DEVELOP NANOBODY PRODUCT CANDIDATES FOCUSED ON IMMUNE-MEDIATED INFLAMMATORY DISEASES GHENT, Belgium, 20 July 2017 - Ablynx [Euronext Brussels: ABLX; OTC: ABYLY] today announced that it has entered into a research collaboration and global exclusive licensing agreement with Sanofi initially focused on developing and commercialising Nanobody®-based therapeutics for the treatment of various immune- mediated inflammatory diseases.

This collaboration gives Sanofi access to certain Nanobodies in Ablynx's existing portfolio as well as to Ablynx's scientists and proprietary Nanobody platform. Under the terms of the agreement, Sanofi gains exclusive global rights to certain multi-specific Nanobodies against selected targets, with options for similar rights to additional targets, for a total of eight potential Nanobody product candidates.

The financial terms include an upfront payment of €23 million to Ablynx, comprised of license and option fees. In addition, Ablynx will receive research funding, estimated to amount to €8 million for the initially selected targets. Upon exercise of options to additional targets, Sanofi will pay Ablynx further option exercise fees and research funding. Sanofi will be responsible for the development, manufacturing and commercialisation of any products resulting from this agreement. Ablynx will be eligible to receive development, regulatory and commercial milestone payments of up to €2.4 billion plus tiered royalties up to low double digits on the net sales of any products originating from the collaboration.

Dr Edwin Moses, CEO of Ablynx, commented:

"This strategically important collaboration further confirms the potential of our Nanobody platform and is a unique opportunity for us to work with a world-leader like Sanofi in the development of a new generation of therapeutics for the treatment of immune-mediated inflammatory diseases. We look forward to exploring the different Nanobody target combinations as new and novel therapeutic options for patients suffering from a range of inflammatory diseases."

Frank Nestle, MD, Sanofi's Global Head of Immunology Therapeutic Research Area and Chief Scientific Officer, North America, commented:

"This collaboration is the latest example of Sanofi's strategic commitment to expand our drug discovery pipeline in immunology at a time when we are launching new treatments for atopic dermatitis and rheumatoid arthritis. We are particularly excited by the Ablynx technology as a leading biologics platform, enabling the development of transformative multi-targeting treatment approaches. Through external partnerships like these, combined with our internal R&D expertise, we aim to transform the treatment landscape for patients living with autoimmune and inflammatory conditions."

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/analyst relations: FTI Consulting

Julia Phillips, Brett Pollard, Mo Noonan t: +44 20 3727 1000

e: ablynx@fticonsulting.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 20 July 2017 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 20 July 2017 07:23:12 UTC.

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