Corporate Presentation September 2014 Nanobodies® Inspired by nature Forward looking statements Certain statements, beliefs and opinions in this presentation 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 presentation 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 presentation 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 presentation 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 presentation. www.ablynx.com 2 Corporate snapshot Corporate • Drug discovery and development company in Ghent, Belgium • >300 employees Technology • Pioneer in next generation biologics – Nanobodies® • >500 granted and pending patents Products • >30 programmes – six in clinical development • Three clinical proof-of-concepts (POC) • >900 healthy volunteers and patients treated with Nanobodies Partners • AbbVie, Boehringer Ingelheim, Eddingpharm, Merck & Co, Merck Serono and Novartis Financials • €196M in cash at 30th June 2014 • Raised €41.7M through private placement (3rd July 2014) www.ablynx.com 3 Key investment highlights Next generation biologics Diversified portfolio Hybrid business model Validating partnerships Q2 2014 in review www.ablynx.com • • Nanobodies – antibody-derived biologics with key competitive advantages > 500 granted and pending patents • • • Products across various therapeutic indications >30 products in the pipeline – 6 in the clinic >10 new clinical programmes anticipated over the next 3 years • • Balancing risk and reward Fully-funded collaborations, 50/50 co-development deals and proprietary programmes • • • Partnerships with leading players >€330M cash-inflow; ~€3Bn in future potential milestones ~20 partnered programmes with 2 currently in the clinic • Key achievements: achieved 3rd clinical proof-of-concept for Nanobodies − successful completion of 2 Phase I inhalation studies (anti-RSV) − start of Phase I bioavailability study (anti-IL-6R partnered with AbbVie) − balance sheet further strengthened through private placement − 4 Three-pronged business strategy Fully-funded programmes with milestones and royalties • ~20 programmes in oncology, immuno-oncology, neurology, inflammation, pulmonology and bone disorders • 5 discovery deals • 5 licensing deals • >€280M in cash received with future potential value of Co-discovery/co-development partnerships • • • • • 3 co-co deals 3 programmes in inflammation and osteoarthritis 50:50 ownership option to convert into licensing deals >€50M in cash received ~€3Bn in potential milestones plus royalties Balancing risk and reward Wholly-owned product pipeline • ~9 programmes in inflammation, ocular, autoimmune, oncology, haematology and infectious disease • aim to retain the optionality to partner if and when appropriate www.ablynx.com 5 Nanobodies – derived from heavy-chain only antibodies Camelid heavy-chain only antibodies are stable and fully functional Nanobodies represent the next generation of antibody-derived biologics VHH VH CH1 VHH VL CL Ablynx’s Nanobody CH2 CH2 CH3 Conventional antibodies www.ablynx.com 12-15kDa CH3 Heavy chain only antibodies • unique formatting flexibility (up to penta-valent) • speed and ease of generating multi-specifics • nano- to picomolar affinities • favourable biophysical properties (Tm, solubility, viscosity) • tackling intractable targets • multiple administration routes • manufacturing in microbial cells 6 Nanobody discovery process – the power of evolution Immunise llamas with antigen Wide range of highly diverse Nanobodies Formatted* Nanobodies ready for in vivo testing ~12-18 months www.ablynx.com * glycine-serine linkers from C-terminus to N-terminus 7 Nanobodies – uniqueness and competitive advantages Broad target applicability, including challenging targets such as GPCRs and ion channels Flexible formatting: multi-valent, multi-specific, bi-paratopic Nanobodies Half-life engineering technology to achieve desired properties (acute versus chronic diseases) (T1/2 from 2h to 20 days) Robustness allows for alternative delivery such as nebulisation Excellent manufacturing (yeast and bacteria), high concentration formulations and low viscosity (excellent syringeability) www.ablynx.com 8 Multi-specific Nanobodies – targeting checkpoint inhibitors Monovalent Nanobodies against different targets Different multi-specific combinations In vivo testing Pardoll, Nature Reviews Cancer (2012) 12:252-264 May need to interfere with multiple pathways www.ablynx.com In vivo POC for different multi-specific combinations in 18-24 months 9 Multi-specifics – Merck & Co immuno-oncology alliance Financials Platform validation Responsibilities www.ablynx.com • €20M upfront at signing in February 2014 • €10.7M in research funding • €1.7Bn in potential total milestones plus royalties • Building on existing collaboration in neurology • Opportunity in the emerging field of cancer immunotherapy • Focused on the discovery and development of Nanobodies targeting immune checkpoint modulators • Exploiting the ability to rapidly generate multi-specific Nanobodies • Ablynx to perform initial research during the first three years of the collaboration • Merck & Co responsible for further development, product registration and commercialisation 10 Fully partnered CoCo Fully owned Broad pipeline – internal and funded programmes Therapeutic area Product name Target Haematology caplacizumab vWF Inflammation/ Immunology/Infection Various Oncology Various Various Pulmonology ALX-0171 Various Various Ocular NA Inflammation/ Immunology NA NA NA Oncology/Neurology Immunology Various Various Immunology/ Inflammation ALX-0761 ALX-0061 ozoralizumab IL-17F/IL-17A IL-6R TNFα in Greater China Bone disorders ALX-0141 RANKL in Greater China Neurology NA Oncology Phase III RSV Potential to evolve into at least 4 co-co programmes NA NA Various NA NA www.ablynx.com Phase II ALX-0751 Pulmonology Immuno-oncology Discovery Pre-clinical Phase I Various Validated targets (clinic) 1st in class 11 Clinical pipeline Nanobodies® Inspired by nature Clinical pipeline – flagship programmes Anti-vWF – caplacizumab – bivalent Nanobody – wholly-owned • first-in-class opportunity with Orphan Drug Status for TTP • statistically significant Phase II POC in patients with acquired TTP • exploratory partnering discussions ongoing and started preparations for Phase III study Anti-IL-6R – ALX-0061 – monovalent Nanobody – partnered • best-in-class potential; compelling POC Phase II results in patients with RA • global exclusive licensing deal with AbbVie (up to $840M in milestones) • Phase IIb studies in RA and SLE expected to start early 2015 (Ablynx responsible) Anti-RSV – ALX-0171 – inhaled trivalent Nanobody – wholly-owned • first-in-class opportunity with high unmet medical need • 3 Phase I safety studies successfully completed • first-in-infant study expected to start in Q4 2014 Anti-IL-17A/F – ALX-0761 – bi-specific Nanobody – partnered www.ablynx.com • potent neutralisation of both IL-17A and IL-17F • pre-clinical POC achieved and Phase I/II in patients with psoriasis ongoing • exclusively licensed to Merck Serono 13 Significant unmet need in the treatment of acquired TTP Thrombotic thrombocytopenic purpura (TTP) exists in two forms: congenital (<10%) and acquired (>90%) Potentially life threatening rare disorder of the blood coagulation system • mortality remains high (10-30%)1 • causes extensive microscopic thrombi in small blood vessels throughout the body Unmet medical need • no specifically indicated therapeutic drug available • primary treatment is plasma exchange (PEX) plus immune modulators - variable duration, associated risks, expensive and time-consuming • potential clinical complications • relapses in ~ 36% of patients2 Rare disorder with an incidence of 11.3 per million2 • ~10,000 acute events annually in US and Europe www.ablynx.com 1.Allford et al, 2003, Kremer Hovinga, 2010; Benhamou 2012; 2. George et al, 2008 14 Caplacizumab – prevents formation of microthrombi in TTP caplacizumab blocks the platelet – ULvWF interaction ADAMTS13 ULvWF multimers Platelet String Formation endothelium caplacizumab (anti-vWF Nanobody) Ex vivo assay for platelet string formation Fluorescence microscopy image of platelets adhering to UL-vWF in plasma of TTP subjects • Without treatment, fluorescently labelled platelets adhere to UL-vWF, observed as string-like structures ULvWF • Caplacizumab inhibits the formation of platelet strings and associated microthrombi ULvWF and anti-vWF Nanobody www.ablynx.com 15 Caplacizumab – 1st-in-class opportunity in acquired TTP Healthy active adult Sudden onset severe fatigue, headache, bizarre behaviour, vertigo, seizures, coma Daily plasma exchanges (PEX) in hospital until recovery of platelet count Treatment with caplacizumab could potentially result in Fewer days and volume of PEX Reduction in exercerbations/relapses and related morbidities Improved longer term outcomes www.ablynx.com 16 Inclusion criteria: subjects with acquired TTP requiring plasma exchange (PEX) Randomisation Caplacizumab – Phase II TITAN design and schedule PEX 30 days placebo 1 year follow-up 1:1 Target – 110 subjects Actual – 75 patients Exclusion criteria: • severe infection / sepsis • pregnancy • bone marrow transplantation • disseminated intravascular coagulation • known congenital TTP 30 days 30 days PEX X caplacizumab 30 days 1 year follow-up Primary endpoint: time to confirmed normalisation of platelet count Secondary endpoints: plasma exchange frequency and volume; relapse; exacerbations; mortality; major clinical events (stroke, MI, organ dysfunction); recovery from signs/symptoms. Long-term endpoints: relapse; non focal neurological symptoms.. Safety & efficacy endpoints www.ablynx.com 17 Primary endpoint – time to confirmed platelet normalisation Median days to confirmed platelet response – subjects with no prior plasma exchange (95% CI) 25th & 75th percentile Median days to confirmed platelet response – subjects with one prior plasma exchange (95% CI) 25th & 75th percentile Overall Hazard Rate Ratio for caplacizumab vs. placebo (95% CI), N = 75 Stratified log-rank test p-value caplacizumab Placebo 3.00 (2.74, 3.88) 4.92 (3.21, 6.59) N = 34 N = 35 2.72 & 4.31 3.01 & 11.37 2.44 (1.92, 2.97) 4.31 (2.91, 5.68) N=2 N=4 1.92 & 2.97 3.37 & 5.23 N = 36 N = 39 2.197 (1.278, 3.778) 0.013 The group of patients treated with caplacizumab in conjunction with the standard of care achieved confirmed platelet normalisation at more than twice the rate of the group receiving the standard of care plus placebo www.ablynx.com 18 Top line secondary endpoints Caplacizumab Placebo N* = 36 N* = 39 Subjects with an exacerbation within 30 days after stopping daily PEX 3 (8%) 11 (28%) Subjects in complete remission within 30 days after stopping daily PEX as measured by confirmed platelet response and absence of exacerbations 29 (81%) 18 (46%) 13 (36.1%) 13 (33.3%) 0 2 Subjects with an exacerbation and/or relapse at 1 month follow-up after study drug treatment was completed Deaths These secondary endpoints illustrate the potential protective effect of caplacizumab treatment in the acute phase of TTP www.ablynx.com *Intention-to-Treat (ITT) population: 75 subjects, all randomised to caplacizumab (36) or placebo (39) 19 TITAN trial – overall conclusions on top line results Clinical proof-of-concept demonstrated • subjects in the caplacizumab arm achieved confirmed platelet normalisation at more than twice the rate of the placebo arm (hazard ratio of 2.2) • median days to normalised platelet counts (in patients who had not undergone a plasma exchange prior to treament with caplacizumab): 3.0 days for the caplacizumab arm vs. 4.9 days for the placebo arm 73% reduction in number of patients with an exacerbation in the caplacizumab arm compared to the placebo arm 76% more subjects in complete remission in the caplacizumab arm compared to the placebo arm No deaths in the caplacizumab arm compared to 2 deaths in the placebo arm TEAEs and serious TEAEs consistent with serious, potentially life-threatening condition Increased bleeding tendency, which is believed to be manageable Increased number of immune-related TEAEs, but didn’t result in treatment discontinuation Caplacizumab demonstrated a potential clinical benefit for subjects with acquired TTP and has an acceptable safety profile www.ablynx.com TEAE: treatment emergent adverse event 20 Caplacizumab – next steps Complete full analysis of TITAN study and consult with KOLs and regulatory authorities Complete a Phase I trial to demonstrate bioequivalence between the liquid and lyophilised formulations Perform market access and pricing study Continue preparations to start a Phase III study in 2015 Continue to evaluate various partnering and commercialisation options Potential presentation of complete Phase II data set at ASH (Dec 2014) In 2015, caplacizumab will be the first Nanobody to enter Phase III clinical development www.ablynx.com 21 ALX-0061 – potentially best-in-class anti-IL-6R Features Potential benefits Small (26kD) • penetrates faster and more effectively into tissues anti-IL-6R anti-HSA Targets human serum albumin (HSA) • prolongs half-life • improved trafficking to inflamed tissue Monovalent binding • avoids target cross-linking Preferential binding of soluble vs. membrane bound IL-6R • superior benefit/risk profile Strong affinity to soluble IL-6R • fast target engagement resulting in fast onset of action Low immunogenic potential • improved safety profile Tailored PK • extended therapeutic window • convenient dosing and scheduling www.ablynx.com 22 Visual Analogue Scale Number of involved joints ALX-0061 – compelling Phase IIa results in RA patients 15 Tender joints Swollen joints 10 5 0 Bl W12 W16 W20 W24 60 Patient health Pain 40 20 0 BL W12 W16 W20 W24 • Treatment showed strong efficacy and was well tolerated at all doses • No increase of adverse events upon extension of treatment • No anti-drug antibodies were detected www.ablynx.com 23 ALX-0061 – global licensing deal with AbbVie Financials Ablynx • • • $175M upfront at signing in September 2013 $665M total potential milestones double-digit royalties • to perform and fund Phase I study with subcutaneous formulation (start Q2 2014) to perform and fund Phase II studies in RA and SLE (start in 2015) • Key data points AbbVie • • • Phase I results subcutaneous formulation: Q4 2014 Phase II results in RA: expected in 2016 Phase II results in SLE: expected in 2018 • to pay a fee for each indication if they exercise the right to license ALX-0061 after completion of the Phase II studies responsible for Phase III development and registration • Commercialisation www.ablynx.com • • AbbVie is responsible for global commercialisation Ablynx retains option to co-promote ALX-0061 in the Benelux RA: rheumatoid arthritis SLE: systemic lupus erythematosus 24 ALX-0171 to treat RSV infection in infants – unmet need ~310,000 children* (< 5 years) hospitalised per year in the 7 major markets • increased medical cost in the 1st year following RSV1 infection2 • prolonged wheezing and risk for asthma development3 The leading cause of infant hospitalisation and leading viral cause of infant death • ~3.5% mortality rate in hospitalised high-risk infants • estimated 400 deaths/year in US Evolves to distressing symptoms Symptomatic treatment including inhaled corticosteroids & bronchodilator 8-20% hospitalised *Extrapolation based on estimated US prevalence www.ablynx.com 1 Respiratory Syncytial Virus 2 Shi et al., J Med Econ, 2011 3 Sigurs et al., Thorax, 2010; Krishnamoorthy et al., Nature Medicine 2012 25 ALX-0171 – proof-of-concept achieved in RSV lamb model RSV infection Necropsy Onset of RSV infection Trivalent anti-RSV Day -1 0 1 2 3 4 5 6 7 8 Treatment ALX-0171 or formulation buffer Mean viral titers in BALF (day 6 post infection) 6 60 Mean % Involvement Log10 FFU/mL BAL 7 5 4 3 2 1 Lung viral lesions (day 6 post infection) 50 40 30 20 10 0 0 Vehicle RSV Vehicle RSV ALX-0171 Vehicle RSV Vehicle RSV ALX-0171 Daily inhalation of ALX-0171 markedly reduced viral titres and lung lesions in RSV-infected lambs www.ablynx.com 26 ALX-0171 – successful Phase I inhalation studies in adults September 2012 – Phase I first-in-human study • 60 healthy volunteers • single–ascending dose and multiple dose up to 210 mg inhaled twice daily for 5 days • well tolerated, with no clinically relevant adverse events or effects on lung function May 2014 – Phase I safety study in adults with hyper-reactive airways • 24 subjects • single-ascending dose and multiple dose part up to 200 mg inhaled daily for five days • some cases of mild bronchoconstriction which could be immediately reversed May 2014 – Phase I PK study • 41 healthy volunteers • single and multiple dose of 200 mg inhaled daily for 5 days and single dose of 0.3 mg/kg i.v. • local half-life of ALX-0171 is approximately 20 hours, confirming potential for once-daily dosing First-in-infant study expected to start in Q4 2014 using a custom-developed infant inhalation device based on a vibrating mesh www.ablynx.com 27 ALX-0761 – opportunity in inflammatory diseases Bi-specific anti-IL-17A/F Nanobody • blocks both IL-17A and IL-17F anti-IL17F • binds HSA for improved PK • proof-of-concept in primate CIA model* anti-IL17A anti-HSA • currently in PhaseIb study in patients with psoriasis 80 Arthritis score 60 40 V e h ic le vehicle A L X - 0 7 6 12.8 2 .8mg/kg m g /k g Nanobody 20 0 -4 A L X - 0 7 6 110 1 0mg/kg m g /k g Nanobody 6 16 26 36 46 56 Days • The first bi-specific Nanobody in the clinic • Exclusively licensed to Merck Serono www.ablynx.com * Poster available on Ablynx website>R&D>pipeline 28 Additional clinical assets – building a presence in China Anti-TNFα – ozoralizumab • Phase II proof-of-concept achieved in patients with RA (Pfizer) • opportunity in inflammation anti-TNF anti-TNF anti-HSA • Ablynx regained worldwide rights to anti-TNFα Nanobodies from Pfizer • exclusively licensed to Eddingpharm in Greater China in August 2014 - €2M upfront; development and commercial milestones; up to 20% royalties • Pre-clinical study in China on-going • Ablynx will have access to the clinical data generated by Eddingpharm to support potential licensing discussions in other regions Anti-RANKL – ALX-0141 • Phase I study successfully completed (Ablynx) • opportunity in bone disorders anti-RANKL anti-RANKL anti-HSA • exclusively licensed to Eddingpharm in Greater China in October 2013 - €2M upfront; commercial milestones; up to 20% royalties • pre-clinical study in China currently on-going • Ablynx will have access to the clinical data generated by Eddingpharm to support potential licensing discussions in other regions www.ablynx.com 29 Partnerships Nanobodies® Inspired by nature Broad platform exploitation and cash generation • Global licensing deal with AbbVie for ALX-0061 (anti-IL-6R) in RA and SLE: $175M upfront and total potential value of $840M plus royalties • Strategic discovery alliance with Boehringer Ingelheim (8 pre-clinical programmes on-going) • 4 deals with Merck Serono: 10 programmes (1 Phase I) on-going in inflammation, immunology, oncology, immuno-oncology, neurology and osteoarthritis • 2 discovery deals with Merck & Co: ion channel deal in neurology; immune-onco deal with €20M upfront, €10.7M research funding and total potential milestones of up to €1.7bn plus royalties • 2 licensing deals with Eddingpharm in Greater China for ALX-0141 (anti-RANKL) in bone disorders and ozoralizumab (anti-TNFα) in inflammation • Target based discovery deal with Novartis >€330M in non-dilutive cash received from collaborators to date ~€3Bn in potential future milestones plus royalties www.ablynx.com 31 Outlook Nanobodies® Inspired by nature News flow in 2014 Completion of clinical trials • Phase I results from safety and PK studies with ALX0171 (anti-RSV) Start of clinical trials • Start of Phase I study with s.c. ALX-0061 (anti-IL-6R) • Start of Phase Ib study with ALX-0761 in patients with psoriasis (Merck Serono) Business development • Phase II results caplacizumab in acquired TTP • Completion SAD Phase I in healthy volunteers with ALX0761 (Merck Serono) • Start of bio-equivalence study with caplacizumab (anti-vWF) Phase I results from s.c. study with ALX-0061 (anti-IL6R) • Start Phase I/II infant study with ALX-0171 (anti-RSV) • Preparation to start Phase II in RA and SLE with ALX-0061 and Phase III with caplacizumab in 2015 • • Phase I results from bioequivalence study with caplacizumab (anti-vWF) 3 trial readouts achieved 3 clinical trials initiated 2 readouts remaining 1 clinical trial to be initiated www.ablynx.com • • Potential additional collaborative deals Continue discussions with potential partners in a number of areas cash generative partnerships 33 Value creation – clinical data expected from patient studies caplacizumab Phase III (anti-vWF) in subjects with acquired TTP ALX-0061 Phase IIb s.c. (anti-IL-6R) in subjects with RA ALX-0171 Phase I/II (anti-RSV) in infants with an RSV infection caplacizumab Phase II (anti-vWF) in subjects with acquired TTP Wholly-owned clinical asset www.ablynx.com Wholly-owned clinical asset Licensed to AbbVie (worldwide) ALX-0761 Phase Ib (anti-IL-17A/F) in subjects with psoriasis Licensed to Merck Serono (worldwide) Wholly-owned clinical asset ALX-0171 Phase II (anti-RSV) in infants with an RSV infection Wholly-owned clinical asset ALX-0141 and ozoralizumab Phase I/II results from studies in China Licensed to Eddingpharm (Greater China) 34 Financials/Shareholders Nanobodies® Inspired by nature Financial summary €M 2012 2013 H1 2014 Revenue 26.7 35.9 22.2 Operating Result (29.8) (17.7) (7.6) Cash Position(1) 62.8 200.4 196.0 (2) Anticipated net cash burn for 2014: €30M - €35M (1) (2) cash, cash equivalents, restricted cash and short-term investments at the end of the period not including ABO completed on 30th June (€41.7M raised) www.ablynx.com 36 Shareholder structure Investors Abingworth (UK); 9,08% Geography Boehringer Ingelheim (DE); 3,97% Biotech Value Fund (US); 4,48% Other 27% US 24% Aviva (UK); 3,19% Perceptive Advisors (US); 3,85% Other institutional and retail investors; 72,09% France 3% Fidelity Management Research LLC (US); 3,35% UK 21% Benelux 25% Ordinary shares listed on Euronext Brussels (ABLX) 54M shares outstanding 2.7M outstanding warrants Free float is ~90% www.ablynx.com 37 Corporate Presentation September 2014 Nanobodies® Inspired by nature