BMPR2

Translational data presented during a late-breaker poster session from a head-to-head study of eblasakimab and dupilumab in a human tissue model of COPD indicates that eblasakimab performed better than dupilumab in improving airway function and enhancing bronchodilation at the same concentrations Results support further investigation of eblasakimab as a potential therapeutic option for COPD with potentially more effective blockade of Type-2 mediated inflammatory effects in lung tissue SAN MATEO, Calif. and SINGAPORE, May 21, 2024 (GLOBE NEWSWIRE) -- ASLAN Pharmaceuticals (Nasdaq: ASLN), a clinical-stage, immunology-focused biopharmaceutical company developing innovative treatments to transform the lives of patients, today announced the late-breaking poster presentation of translational data from head-to-head studies of eblasakimab and dupilumab in human healthy and COPD-derived lung tissue models at the American Thoracic Society (ATS) International Conference 2024 in San Diego, California. “We are pleased to present the translational data that we have generated on eblasakimab in COPD at this prestigious conference. Eblasakimab showed significant improvement across all measured bronchial outcomes, a result we believe may be attributed to the potential of eblasakimab to inhibit the Type 2 receptor complex more efficiently than approved biologics, resulting in greater reduction in Th2 cytokine activity. Since airway hyperresponsiveness is clinically shared across asthma, COPD, and other lung disorders, these data support the further investigation of eblasakimab in a range of Type 2-driven lung conditions,” saidDr Carl Firth, Chief Executive Officer, ASLAN Pharmaceuticals. ATS 2024 International Conference presentation details: Late-breaker poster presentation Eblasakimab Significantly Alleviates IL-4 and IL-13 Induced Bronchial Airway Constriction in COPD-Derived Lung Slices (Poster ID 13753) Type 2 inflammation is observed in 30-40% of COPD patients1 and during exacerbations, characterized by impaired airflow, obstruction, and dyspnea2. Interleukin-4 (IL-4) and interleukin-13 (IL-13) are central mediators of Type 2 inflammation3 and are implicated in various mechanisms of airway obstruction in asthma4, suggesting they may play an essential role in COPD4. Blocking dual IL-4 and IL-13 signaling may have the potential to prevent bronchoconstriction. This was tested using the precision cut-lung slices (PCLS) model of COPD by treatment with dupilumab and eblasakimab which target different receptor subunits of the IL-4 and IL-13 signaling pathway. PCLS from a 66-year-old male with no known history of lung diseases (healthy PCLS) and a 67-year-old female with COPD (COPD PCLS) were used to test constriction and dilation responses to different treatment conditions including IL-4, IL-13, methacholine (bronchoconstrictor), formoterol (dilatory agent), and a range of concentrations of dupilumab and eblasakimab. In both healthy and COPD-derived lung tissues, eblasakimab significantly reduced IL-4- and IL-13-induced bronchial airway constriction. In IL-4 and IL-13 pre-treated healthy lung tissues, eblasakimab further restored formoterol-induced airway dilation, significantly better than dupilumab at the lower concentration, and improved methacholine-induced constriction. The results suggest eblasakimab may provide a therapeutic benefit in reducing IL-4- and IL-13-induced airway hyperresponsiveness and that eblasakimab may provide relief in situations of acute airway constriction. In COPD PCLS, eblasakimab showed significant improvement across all measured bronchial outcomes whereas dupilumab, tested at the same concentrations, did not achieve statistical significance relative to placebo for all measures. This suggests that eblasakimab may potentially provide stronger relief against bronchoconstriction as well as improved dilatory function in COPD compared to dupilumab. The results support further investigation of eblasakimab as a therapeutic option for COPD with potentially more effective blockade of Type-2 mediated effects in lung tissue and improvement in bronchoconstriction. A copy of the poster is available to view online in the Publications section of ASLAN’s website. Singh et al (2014) Eur Resp Journal 44: 1697-1700 Celli BR, et al (2023) Am J Respir Crit Care Med 207(9):1134-1144 Bao K & Reinhardt RL (2015) Cytokine 75(1):25-37 Oishi K et al (2020) J Clin Med 9(8):2670 About eblasakimab Eblasakimab is a potential first-in-class monoclonal antibody targeting the IL-13 receptor subunit of the Type 2 receptor, a key pathway driving several allergic inflammatory diseases. Eblasakimab’s unique mechanism of action enables specific blockade of the Type 2 receptor and has the potential to improve upon current biologics used to treat allergic disease. By blocking the Type 2 receptor, eblasakimab prevents signaling through both interleukin 4 (IL-4) and interleukin 13 (IL-13) – the key drivers of inflammation in AD and Type 2-driven COPD. ASLAN announced positive results from the Phase 2b TREK-AD study of eblasakimab in moderate-to-severe AD patients in July 2023, and is currently investigating eblasakimab in dupilumab-experienced, moderate-to-severe AD patients in the Phase 2 trial, TREK-DX. About ASLAN Pharmaceuticals ASLAN Pharmaceuticals (Nasdaq: ASLN) is a clinical-stage, immunology-focused biopharmaceutical company developing innovative treatments to transform the lives of patients. ASLAN is developing eblasakimab, a potential first-in-class antibody targeting the IL-13 receptor in moderate-to-severe atopic dermatitis (AD) with the potential to improve upon current biologics used to treat allergic disease, and has reported positive topline data from a Phase 2b dose-ranging study in moderate-to-severe AD patients. ASLAN is currently investigating eblasakimab in dupilumab-experienced, moderate-to-severe AD patients in the TREK-DX Phase 2 trial, with topline data expected at the end of 2024. ASLAN is also developing farudodstat, a potent oral inhibitor of the enzyme dihydroorotate dehydrogenase (DHODH) as a potential first-in-class treatment for alopecia areata (AA) in a Phase 2a, proof-of-concept trial with an interim readout expected in Q3 2024. ASLAN has teams in San Mateo, California, and in Singapore. For additional information please visit the ASLAN website or follow ASLAN on LinkedIn. Forward looking statements This release contains forward-looking statements. These statements are based on the current beliefs and expectations of the management of the Company. These forward-looking statements may include, but are not limited to statements regarding the Company’s business strategy and clinical development plans; statements related to the safety and efficacy of eblasakimab, including interim results; the Company’s plans and expected timing with respect to clinical trials, clinical trial enrollment and clinical trial results for eblasakimab; and the potential of eblasakimab as a first-in-class treatment for atopic dermatitis, and in Type-2 receptor-driven lung conditions. The Company’s estimates, projections and other forward-looking statements are based on management's current assumptions and expectations of future events and trends, which affect or may affect the Company’s business, strategy, operations, or financial performance, and inherently involve significant known and unknown risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of many risks and uncertainties, which include, unexpected safety or efficacy data observed during preclinical or clinical studies; risks that future clinical trial results may not be consistent with interim, initial or preliminary results or results from prior preclinical studies or clinical trials; clinical site activation rates or clinical trial enrollment rates that are lower than expected; the impact of health epidemics or pandemics, or geopolitical conflicts on the Company’s operations, research and development and clinical trials and potential disruption in the operations and business of third-party manufacturers, contract research organizations, other service providers and collaborators with whom the Company conducts business; general market conditions; changes in the competitive landscape; the Company’s ability to obtain and maintain intellectual property protection for product candidates; and the Company’s ability to obtain sufficient financing to fund its strategic and clinical development plans. Other factors that may cause actual results to differ from those expressed or implied in such forward-looking statements are described in the Company’s US Securities and Exchange Commission filings and reports (Commission File No. 001- 38475), including the Company’s Annual Report on Form 20-F filed with the US Securities and Exchange Commission on April 12, 2024. All statements other than statements of historical fact are forward-looking statements. The words “believe,” “may,” “might,” “could,” “will,” “aim,” “estimate,” “continue,” “anticipate,” “intend,” “expect,” “plan,” or the negative of those terms, and similar expressions that convey uncertainty of future events or outcomes are intended to identify estimates, projections, and other forward-looking statements. Estimates, projections, and other forward-looking statements speak only as of the date they were made, and, except to the extent required by law, the Company undertakes no obligation to update or review any estimate, projection, or forward-looking statement. ASLAN Media and IR contacts Emma Thompson Ashley R. Robinson Spurwing Communications LifeSci Advisors, LLC Tel: +65 6206 7350 Tel: +1 (617) 430-7577 Email: ASLAN@spurwingcomms.com Email: arr@lifesciadvisors.com

New positive data from an additional analysis of dupilumab-experienced patients treated with eblasakimab 400mg, weekly over 16 weeks further support the recent finding that some AD patients may respond to eblasakimab even after having an inadequate response to dupilumabData to be presented in a KOL event to be held Tuesday, May 7, 2024 at 8:00 am ET, register here SAN MATEO, Calif. and SINGAPORE, May 07, 2024 (GLOBE NEWSWIRE) -- ASLAN Pharmaceuticals (Nasdaq: ASLN), a clinical-stage, immunology-focused biopharmaceutical company developing innovative treatments to transform the lives of patients, will today host a virtual KOL event, during which Company management will present new data from the interim analysis of the Phase 2 TREK-DX study of eblasakimab in dupilumab-experienced atopic dermatitis (AD) patients. The KOL event, “Treatment Options for Atopic Dermatitis Patients with an Inadequate Response to Dupilumab: Exploring the Potential of Eblasakimab in this Sizable New Market”, will begin at 8:00 am ET and participants may register here. “The numbers we have reported from the interim analysis of the TREK-DX study are unprecedented in previous biologics studies in atopic dermatitis (AD) and the new data continue to support our original conclusions announced in April. We’re delighted to observe patient-reported outcomes, such as itch score, correlate strongly to the investigator-assessed outcomes we previously reported, including the vIGA and EASI scores,” said Dr Carl Firth, Chief Executive Officer, ASLAN Pharmaceuticals. “Based on these data and the data we previously reported from the interim analysis of the TREK-DX study, we are establishing a greater understanding of how patients who did not respond to dupilumab may respond to eblasakimab, and, additionally, how eblasakimab may be effective in those AD patients who have a very limited number of safe and long-term alternatives.” In April, ASLAN announced positive interim data from 22 patients enrolled in the TREK-DX study. The primary endpoint, which is the percent change in Eczema Area Severity Index (EASI) score from baseline to Week 16, was statistically significant when compared to placebo (p=0.0059), even though the interim analysis was not powered for statistical significance due to the sample size. 60.0% of dupilumab-experienced AD patients treated with 400mg eblasakimab weekly achieved EASI-90 (at least a 90% reduction in their EASI score) and 66.7% achieved a vIGA score of 0 or 1 (clear or almost clear skin) after 16 weeks, versus 14.3% of patients on placebo. During the KOL event today, Company management will present new data on investigator-assessed and patient-reported secondary endpoints and data from the subgroup of patients with prior inadequate response to dupilumab. Discontinuation rates were lower for patients treated with eblasakimab (13%, 2/15) compared to those on placebo (43%, 3/7). Time courses for secondary endpoints demonstrated rapid onset of effect for patients treated with eblasakimab, with over half of patients achieving EASI-75 by Week 6 (8/15) and 73% (11/15) achieving EASI-75 by Week 16. These investigator assessments are further supported by patient-reported pruritus scores, which show a rapid reduction in itch, with clear separation observed as early as Week 2. Waterfall plots of individual patient responses show clear and consistent improvements in almost all patients treated with eblasakimab versus placebo. Patients with prior inadequate response to dupilumab showed mean percent change in EASI at Week 16 of 91% reduction (n=6). “Today’s discussions come at an important time as physicians see an emerging dupilumab-experienced AD patient population who are seeking alternative safe and long-term treatments to the existing therapies available today. The interim results from the TREK-DX study are impressive and I look forward to the topline readout from the full dataset of this unique study later this year,” said Peter Lio, MD, Northwestern University. Virtual KOL event today Today, ASLAN is hosting a virtual KOL event that will feature a discussion with Lisa Beck, MD from University of Rochester, Peter Lio, MD from Northwestern University, and Raj Chovatiya, MD, PhD from Rosalind Franklin University Chicago Medical School, moderated by Seth Orlow, MD, PhD from New York University, on patients with moderate-to-severe AD that had previously been treated with dupilumab. Panelists will discuss this growing new market, the treatment options available to AD patients with an inadequate response to dupilumab and the interim results of the TREK-DX study in this patient population. The event will begin at 8:00 am ET and participants may register here. A replay of the KOL Event will be made available here and can also be found on ASLAN’s website within the Investor Relations ,“Recent Events” section. About the TREK-DX study TREK-DX (TRials in EblasaKimab in Dupilumab eXperienced AD patients) is the first randomized, double-blind, placebo-controlled trial to be conducted in AD patients who have been previously treated with dupilumab. The trial is expected to enroll 75 patients across sites in North America and Europe to evaluate the efficacy and safety of eblasakimab in patients with moderate-to-severe AD previously treated with dupilumab. The trial is enrolling patients who have discontinued dupilumab treatment for any reason, including inadequate control of AD, loss of access or an adverse event, after at least 16 weeks of dupilumab treatment. The trial consists of a 16-week treatment period and an 8-week safety follow-up period. Patients in the active arm receive a loading dose of 600mg of eblasakimab at weeks 0 and 1, followed by 400mg eblasakimab dosed every week. Patients in the placebo arm are dosed at weeks 0 and 1 and every week thereafter. The primary efficacy endpoint is percentage change in EASI score from baseline to week 16. Key secondary efficacy endpoints include the proportion of patients achieving validated Investigator Global Assessment (vIGA) score of 0 (clear) or 1 (almost clear), proportion of patients with a 75% or greater reduction in EASI (EASI-75), proportion of patients achieving EASI-50 and EASI-90, and changes in peak pruritus. About eblasakimab Eblasakimab is a potential first-in-class monoclonal antibody targeting the IL-13 receptor subunit of the Type 2 receptor, a key pathway driving several allergic inflammatory diseases. Eblasakimab’s unique mechanism of action enables specific blockade of the Type 2 receptor and has the potential to improve upon current biologics used to treat allergic disease. By blocking the Type 2 receptor, eblasakimab prevents signaling through both interleukin 4 (IL-4) and interleukin 13 (IL-13) – the key drivers of inflammation in AD and Type 2-driven COPD. ASLAN announced positive results from the Phase 2b TREK-AD study of eblasakimab in moderate-to-severe AD patients in July 2023, and is currently investigating eblasakimab in dupilumab-experienced, moderate-to-severe AD patients in the Phase 2 trial, TREK-DX. About ASLAN Pharmaceuticals ASLAN Pharmaceuticals (Nasdaq: ASLN) is a clinical-stage, immunology-focused biopharmaceutical company developing innovative treatments to transform the lives of patients. ASLAN is developing eblasakimab, a potential first-in-class antibody targeting the IL-13 receptor in moderate-to-severe atopic dermatitis (AD) with the potential to improve upon current biologics used to treat allergic disease, and has reported positive topline data from a Phase 2b dose-ranging study in moderate-to-severe AD patients. ASLAN is currently investigating eblasakimab in dupilumab-experienced, moderate-to-severe AD patients in the TREK-DX Phase 2 trial, with topline data expected at the end of 2024. ASLAN is also developing farudodstat, a potent oral inhibitor of the enzyme dihydroorotate dehydrogenase (DHODH) as a potential first-in-class treatment for alopecia areata (AA) in a Phase 2a, proof-of-concept trial with an interim readout expected in Q3 2024. ASLAN has teams in San Mateo, California, and in Singapore. For additional information please visit the ASLAN website or follow ASLAN on LinkedIn. Forward looking statements This release contains forward-looking statements. These statements are based on the current beliefs and expectations of the management of the Company. These forward-looking statements may include, but are not limited to statements regarding the Company’s business strategy and clinical development plans; statements related to the safety and efficacy of eblasakimab, including interim results; the Company’s plans and expected timing with respect to clinical trials, clinical trial enrollment and clinical trial results for eblasakimab; and the potential of eblasakimab as a first-in-class treatment for atopic dermatitis. The Company’s estimates, projections and other forward-looking statements are based on management's current assumptions and expectations of future events and trends, which affect or may affect the Company’s business, strategy, operations, or financial performance, and inherently involve significant known and unknown risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of many risks and uncertainties, which include, unexpected safety or efficacy data observed during preclinical or clinical studies; risks that future clinical trial results may not be consistent with interim, initial or preliminary results or results from prior preclinical studies or clinical trials; clinical site activation rates or clinical trial enrollment rates that are lower than expected; the impact of health epidemics or pandemics, or geopolitical conflicts on the Company’s operations, research and development and clinical trials and potential disruption in the operations and business of third-party manufacturers, contract research organizations, other service providers and collaborators with whom the Company conducts business; general market conditions; changes in the competitive landscape; the Company’s ability to obtain and maintain intellectual property protection for product candidates; and the Company’s ability to obtain sufficient financing to fund its strategic and clinical development plans. Other factors that may cause actual results to differ from those expressed or implied in such forward-looking statements are described in the Company’s US Securities and Exchange Commission filings and reports (Commission File No. 001- 38475), including the Company’s Annual Report on Form 20-F filed with the US Securities and Exchange Commission on April 12, 2024. All statements other than statements of historical fact are forward-looking statements. The words “believe,” “may,” “might,” “could,” “will,” “aim,” “estimate,” “continue,” “anticipate,” “intend,” “expect,” “plan,” or the negative of those terms, and similar expressions that convey uncertainty of future events or outcomes are intended to identify estimates, projections, and other forward-looking statements. Estimates, projections, and other forward-looking statements speak only as of the date they were made, and, except to the extent required by law, the Company undertakes no obligation to update or review any estimate, projection, or forward-looking statement. ASLAN Media and IR contacts Emma ThompsonSpurwing CommunicationsTel: +65 6206 7350 Email: ASLAN@spurwingcomms.comAshley R. RobinsonLifeSci Advisors, LLCTel: +1 (617) 430-7577Email: arr@lifesciadvisors.com

ASLAN management will present new data from the interim analysis of the TREK-DX study Register here to attend the webinar event on May 7, 2024 at 8:00 AM ET SAN MATEO, Calif. and SINGAPORE, April 30, 2024 (GLOBE NEWSWIRE) -- ASLAN Pharmaceuticals (Nasdaq: ASLN), a clinical-stage, immunology-focused biopharmaceutical company developing innovative treatments to transform the lives of patients, today announced that it will host a virtual Key Opinion Leader (KOL) Event, “Treatment Options for Atopic Dermatitis Patients with an Inadequate Response to Dupilumab: Exploring the Potential of Eblasakimab in this Sizable New Market”, to be held on Tuesday, May 7, 2024 from 8:00 AM ET to 9:00 AM ET. The event will feature a discussion with Lisa Beck, MD from University of Rochester, Peter Lio, MD from Northwestern University, and Raj Chovatiya, MD, PhD from Rosalind Franklin University Chicago Medical School, moderated by Seth Orlow, MD, PhD from New York University, on the recently announced positive interim results from ASLAN’s Phase 2 TREK-DX study of eblasakimab, a potential first-in-class biologic candidate, in patients with moderate-to-severe atopic dermatitis (AD) that had previously been treated with dupilumab. Panelists will discuss this growing new market and the treatment options available to patients with an inadequate response to dupilumab. Company management will also present new data from the interim analysis of the TREK-DX study. Eblasakimab is a novel monoclonal antibody targeting the IL-13 receptor subunit of the Type 2 receptor, a key pathway driving several allergic inflammatory diseases. Interim data from TREK-DX, a first-of-its-kind study of dupilumab-experienced AD patients, shows eblasakimab may have the potential to be highly effective in AD patients even if dupilumab has not been. A live question and answer session will follow the formal presentation. Register here to attend the webcast or watch the replay of the event. About Lisa Beck, MD Lisa Beck, MD is the Lowell & Carol Goldsmith Professor of Dermatology, with secondary appointments in Medicine (Allergy, Immunology, Rheumatology) & Pathology. She has a longstanding interest in atopic dermatitis (AD) focusing on the dynamic interaction between skin epithelial abnormalities and the innate and type 2 immune inflammation. She was the first to describe and characterize epidermal tight junction (TJ) defects in patients with AD. Dr. Beck is the Co-Director of the URMC Center for Allergic Disease Research. She is secretary of the International Eczema Council since 2014, emeritus member of National Eczema Association’s Scientific Advisory committee, and Past - President of the Society of Investigative Dermatology. She was lead author of the 2014 NEJM paper that set the stage for FDA approval of dupilumab, the first biologic used to treat patients with moderate to severe AD. She has had continuous NIH funding since 1994 and has also received funding from foundations and industry. She has been co-PI of the NIH/NIAID-funded Atopic Dermatitis Research Network (ADRN) since its inception in 2004, which has amassed the largest registry and biobank of deeply phenotyped AD subjects in the world (housed at URMC). About Peter A Lio, MD Peter A Lio, MD is a Clinical Assistant Professor of Dermatology & Pediatrics at Northwestern University Feinberg School of Medicine. Dr. Lio received his medical degree from Harvard Medical School, completed his internship in Pediatrics at Boston Children’s Hospital, and his Dermatology training at Harvard where he served as Chief Resident in Dermatology. While at Harvard, he received formal training in acupuncture. Dr. Lio is the founding director of the Chicago Integrative Eczema Center and a founding partner of Medical Dermatology Associates of Chicago. He serves as a board member and scientific advisory committee member emeritus for the National Eczema Association. He is a member of the American Academy of Dermatology’s Atopic Dermatitis Expert Resource Group and a founding faculty member of the Integrative Dermatology Certificate Program. He has over 200 publications and 3 textbooks. About Raj Chovatiya, MD, PhD, MSCI Raj Chovatiya, MD, PhD, MSCI is Clinical Associate Professor of Medicine at Rosalind Franklin University Chicago Medical School and Founder and Director of the Center for Medical Dermatology and Immunology Research in Chicago, Illinois. His clinical and research focus includes the intersection of cutaneous immunology and inflammatory disease. He received his MD and PhD in immunology from Yale and completed his residency, postdoctoral research fellowship, and MS in Clinical Investigation at Northwestern University where he also served as Chief Resident. Dr. Chovatiya has a particular interest in optimizing patient-centered care, understanding chronic disease burden especially in understudied inflammatory diseases, exploring health and social disparities, and improving care across diverse skin types. He has published numerous abstracts and manuscripts and has been nationally and internationally recognized for his contributions as a clinician, educator, researcher, and leader. About Seth Orlow, MD, PhD Seth Orlow, MD, PhD is a Professor at New York University Grossman School of Medicine and Chair of the Ronald O. Perelman Department of Dermatology. Since 2010, he has served as a Senior Advisor with Pharus Advisors, advising biopharmaceutical and medical tech companies on strategic transactions (often cross border) with a focus on dermatology and immunology, including in the area of atopic dermatitis. He is also one of the co-founders and organizers of the annual Dermatology Summit and Dermatology innovation Forum. In 1995 he co-founded Anaderm, a dermatologic discovery company backed by Pfizer and OSI Pharmaceuticals. He participated in the sale of Anaderm to Pfizer in 2002. From 2001-2010, he rose from Advisor to Partner with Easton Capital Partners, a venture capital firm focused on healthcare and consumer products. Dr. Orlow has licensed technologies to companies ranging from Pfizer to SkinMedica. An author of over 200 medical/scientific publications, he is an internationally sought-after speaker and thought leader. A graduate of Harvard in Biochemical Sciences and with an MD-PhD in Molecular Pharmacology from Albert Einstein College of Medicine, Dr. Orlow trained in Pediatrics and Dermatology at Mt. Sinai and Yale. About eblasakimab Eblasakimab is a potential first-in-class monoclonal antibody targeting the IL-13 receptor subunit of the Type 2 receptor, a key pathway driving several allergic inflammatory diseases. Eblasakimab’s unique mechanism of action enables specific blockade of the Type 2 receptor and has the potential to improve upon current biologics used to treat allergic disease. By blocking the Type 2 receptor, eblasakimab prevents signaling through both interleukin 4 (IL-4) and interleukin 13 (IL-13) – the key drivers of inflammation in AD and Type 2-driven COPD. ASLAN announced positive results from the Phase 2b TREK-AD study of eblasakimab in moderate-to-severe biologic-naïve AD patients in July 2023, and is currently investigating eblasakimab in dupilumab-experienced, moderate-to-severe AD patients in the Phase 2 trial, TREK-DX. About ASLAN Pharmaceuticals ASLAN Pharmaceuticals (Nasdaq: ASLN) is a clinical-stage, immunology-focused biopharmaceutical company developing innovative treatments to transform the lives of patients. ASLAN is developing eblasakimab, a potential first-in-class antibody targeting the IL-13 receptor in moderate-to-severe atopic dermatitis (AD) with the potential to improve upon current biologics used to treat allergic disease, and has reported positive topline data from a Phase 2b dose-ranging study in moderate-to-severe AD patients. ASLAN is currently investigating eblasakimab in dupilumab-experienced, moderate-to-severe AD patients in the TREK-DX Phase 2 trial, with topline data expected at the end of 2024. ASLAN is also developing farudodstat, a potent oral inhibitor of the enzyme dihydroorotate dehydrogenase (DHODH) as a potential first-in-class treatment for alopecia areata (AA) in a Phase 2a, proof-of-concept trial with an interim readout expected in Q3 2024. ASLAN has teams in San Mateo, California, and in Singapore. For additional information please visit the ASLAN website or follow ASLAN on LinkedIn. Forward-looking statements This release contains forward-looking statements. These statements are based on the current beliefs and expectations of the management of the Company. These forward-looking statements may include, but are not limited to statements regarding the Company’s business strategy and clinical development plans; statements related to the safety and efficacy of eblasakimab, including interim results; the Company’s plans and expected timing with respect to clinical trials, clinical trial enrollment and clinical trial results for eblasakimab; the potential of eblasakimab as a first-in-class treatment for atopic dermatitis; and expectations regarding the terms of patents and ability to obtain and maintain intellectual property protection for product candidates. The Company’s estimates, projections and other forward-looking statements are based on management’s current assumptions and expectations of future events and trends, which affect or may affect the Company’s business, strategy, operations, or financial performance, and inherently involve significant known and unknown risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of many risks and uncertainties, which include, unexpected safety or efficacy data observed during preclinical or clinical studies; risks that future clinical trial results may not be consistent with interim, initial or preliminary results or results from prior preclinical studies or clinical trials; clinical site activation rates or clinical trial enrollment rates that are lower than expected; the impact of health epidemics or pandemics, or geopolitical conflicts on the Company’s operations, research and development and clinical trials and potential disruption in the operations and business of third-party manufacturers, contract research organizations, other service providers and collaborators with whom the Company conducts business; general market conditions; changes in the competitive landscape; and the Company’s ability to obtain sufficient financing to fund its strategic and clinical development plans. Other factors that may cause actual results to differ from those expressed or implied in such forward-looking statements are described in the Company’s US Securities and Exchange Commission filings and reports (Commission File No. 001- 38475), including the Company’s Annual Report on Form 20-F filed with the US Securities and Exchange Commission on April 12, 2024. All statements other than statements of historical fact are forward-looking statements. The words “believe,” “may,” “might,” “could,” “will,” “aim,” “estimate,” “continue,” “anticipate,” “intend,” “expect,” “plan,” or the negative of those terms, and similar expressions that convey uncertainty of future events or outcomes are intended to identify estimates, projections, and other forward-looking statements. Estimates, projections, and other forward-looking statements speak only as of the date they were made, and, except to the extent required by law, the Company undertakes no obligation to update or review any estimate, projection, or forward-looking statement. ASLAN Media and IR contacts Emma Thompson Spurwing Communications Tel: +65 6206 7350 Email: ASLAN@spurwingcomms.com Ashley R. Robinson LifeSci Advisors, LLC Tel: +1 (617) 430-7577 Email: arr@lifesciadvisors.com