ABLYNX ANNOUNCES RESULTS FOR THE FIRST NINE MONTHS OF 2016 AND A YEAR-TO-DATE BUSINESS UPDATE

REGULATED INFORMATION

Strong clinical progress across our product portfolio

GHENT, Belgium, 23 November 2016 - Ablynx [Euronext Brussels: ABLX; OTC: ABYLY] today announced its financial results, summarising the non-audited financial position for the first nine months of 2016, a business update for the year-to-date and the outlook for the next period.

Operational highlights year-to-date

  • Caplacizumab - wholly-owned anti-vWF Nanobody® for the treatment of acquired TTP (aTTP)

    • Publication of the Phase II TITAN study results for caplacizumab in The New England Journal of Medicine (NEJM).

    • Post-hoc analyses of the TITAN study results demonstrated that caplacizumab has a significant effect on clinically relevant endpoints showing a 71% reduction in frequency of major thromboembolic events (e.g. stroke) and a dramatic reduction in refractoriness to treatment; the latter is associated with a very poor prognosis for survival of an acute episode of aTTP.

    • Initial target recruitment of 92 patients in HERCULES Phase III study of caplacizumab already achieved, 6 months ahead of schedule. Target enrolment increased to 132 patients with results still expected in H2 2017.

    • Started 3-year follow-up study with patients who completed the HERCULES study to evaluate the long-term safety and efficacy of caplacizumab, the safety and efficacy of repeated use of caplacizumab and to characterise the severity and long-term impact of aTTP.

    • On track to file for conditional approval of caplacizumab in Europe in early 2017.

  • ALX-0171 - wholly-owned inhaled Nanobody for the treatment of RSV infections

    • Once daily inhalation, for 3 consecutive days, of ALX-0171 in infants hospitalised with a RSV infection was safe and well tolerated, had a significant and immediate impact on viral replication and an encouraging initial therapeutic effect.

    • Phase IIb dose-ranging efficacy study in 180 hospitalised infants with a RSV infection on track to start by year-end.

  • Vobarilizumab - anti-IL-6R Nanobody for the treatment of RA and SLE

    • Delivered excellent efficacy and safety results from the Phase IIb monotherapy and combination therapy studies of vobarilizumab in RA; AbbVie subsequently decided not to exercise its right to opt-in and license vobarilizumab in this indication. Ablynx has started the process of identifying a new partner for vobarilizumab in RA.

    • Recruitment of 300 patients in SLE Phase II study ahead of schedule; results anticipated in H1 2018.

  • Three partnered Nanobody programmes began Phase I clinical development, which triggered >€16 million in success fees to Ablynx.

  • Ion channel collaboration with Merck & Co., Inc. extended for the second time, triggering a €1 million milestone payment to Ablynx.

  • Initiated >15 new wholly-owned and partnered pre-clinical programmes bringing the total number of active programmes in the R&D pipeline to >45.