LAG3

Multiple trials underscore the potential of tislelizumab-containing immuno-oncology combinations in a variety of solid tumor settings Additional highlights include preclinical characterization data for an investigational BTK degrader, BGB-16673, currently in clinical development for B-cell malignancies, including mantle cell lymphoma BASEL, Switzerland & BEIJING & CAMBRIDGE, Mass.--(BUSINESS WIRE)-- BeiGene, Ltd. (NASDAQ: BGNE; HKEX: 06160; SSE: 688235), a global oncology company, today announced the presentation of emerging oncology pipeline data at the American Association for Cancer Research (AACR) Annual Meeting April 5-10 in San Diego. BeiGene has nine abstracts scheduled for poster presentations at AACR. “Our presentations at this year’s AACR showcase our ongoing development of tislelizumab combinations in solid tumors as we assess the clinical potential of multiple novel immuno-oncology candidates and make data-driven decisions for further development,” said Lai Wang, Ph.D., Global Head of Research & Development at BeiGene. “More broadly, they reflect our deep commitment to discovering innovative new medicines for cancer patients, including by pioneering novel mechanisms like targeted degradation.” BeiGene will present results from the AdvanTIG-204 Phase 2 study of tislelizumab (anti-PD1) plus ociperlimab (anti-TIGIT) in first-line limited-stage small cell lung cancer (SCLC) as well as results of a biomarker study of the same doublet in the setting of first-line non-small cell lung cancer (NSCLC). An ongoing, global Phase 3 trial of ociperlimab plus tislelizumab in stage IV, PD-L1 high NSCLC, AdvanTIG-302, will complete enrollment this month (NCT04746924). An additional clinical presentation includes the first data from a Phase 1a dose escalation study of BGB-10188, a phosphatidylinositol 3 kinase delta (PI3Kδ) inhibitor, plus tislelizumab in patients with solid tumors. BeiGene will also be presenting preclinical characterizations of several novel molecules from its internal discovery engine, including a CEA x 4-1BB bispecific antibody and a chimeric degradation activation compound (CDAC) targeting BTK, BGB-16673. Clinical data from an ongoing Phase 1 study of BGB-16673 in relapsed/refractory B-cell malignancies were presented at ASH 2023, demonstrating clinical responses and a tolerable safety pro heavily pre-treated patients with B-cell malignancies, including those with BTK inhibitor-resistant disease (NCT05006716).​ An additional preclinical presentation highlights the therapeutic potential of the triple-combination of tislelizumab with anti-LAG-3 (LBL-007) and anti-TIM-3 (surzebiclimab); this combination is being evaluated in an ongoing Phase 2 study in head and neck squamous cell carcinoma (NCT05909904). BeiGene Presentations During AACR 2024 Abstract Title Abstract # Presentation Time (PDT) Lead Author Preclinical Characterization of the correlation between BTK degradation and tumor growth inhibition of the BTK target protein degraders using PK/PD modeling 2110 Monday, April 8 9 a.m. – 12:30 p.m. Section 30 Board #1 Y. Wu BGB-B167, a first-in-class 4-1BB/CEACAM5 bispecific antibody, exhibits potent in vitro and in vivo anti-tumor activity and superior safety pro > in preclinical models 2371 Monday, April 8 9 a.m. – 12:30 p.m. Section 38 Board #17 Z. Li Translational assessment of triple combination with tislelizumab (anti-PD-1), LBL-007 (anti-LAG- 3) and surzebiclimab (anti-TIM-3) highlights its strong anti-tumor activity and clinical potential in solid tumors such as HNSCC 4041 Tuesday, April 9 9 a.m. – 12:30 p.m. Section 3 Board #17 H. Zhu Clinical Exploration of potential biomarkers correlated with efficacy of ociperlimab (anti-TIGIT) plus tislelizumab (anti-PD1) in 1L PD-L1+ non-small cell lung cancer (NSCLC) CT053 Monday, April 8 9 a.m. – 12:30 p.m. Section 48 Board #3 S. Kim A first in human, phase 1a, dose escalation study of BGB 10188, a phosphatidylinositol 3 kinase delta (PI3Kδ) inhibitor, + tislelizumab (anti-PD-1) in patients with solid tumors CT189 Tuesday, April 9 9 a.m. – 12:30 p.m. Section 48 Board #17 R. Cosman AdvanTIG-204: A phase 2, multicenter, randomized, 3-arm, open-label study investigating the preliminary efficacy and safety of ociperlimab (anti-TIGIT) + tislelizumab (anti-PD-1) + concurrent chemoradiotherapy (cCRT) in patients with untreated limited-stage small cell lung cancer (SCLC) CT255 Tuesday, April 9 1:30 p.m. – 5 p.m. Section 48 Board #14 Y. Gong BGB-A317-LBL-007-202 (NCT06010303): A phase 2, randomized, active-controlled, open- label study to evaluate the efficacy and safety of LBL 007 (anti-LAG-3) in combination with tislelizumab (TIS; anti-PD-1) plus chemotherapy (chemo) as first-line (1L) treatment in patients with unresectable locally advanced/metastatic esophageal squamous cell carcinoma (ESCC) CT274 Tuesday, April 9 1:30 p.m. – 5 p.m. Section 50 Board #4 S. Park Liberty-201 (NCT05609370): Maintenance fluoropyrimidine and bevacizumab with or without anti-lymphocyte activation gene-3 (LAG-3) antibody LBL-007 plus anti-programmed cell death protein-1 (PD-1) antibody tislelizumab (TIS) for patients (pts) with metastatic or unresectable microsatellite stable (MSS)/mismatch repair proficient (pMMR)colorectal cancer (CRC) CT276 Tuesday, April 9 1:30 p.m. – 5 p.m. Section 50 Board #6 H.-J. Lenz BGB-LC-201 (NCT05635708): A phase 2, open- label, multi-arm study of tislelizumab (TIS; anti- PD-1) in combination with investigational agents +/- chemotherapy as first-line treatment for patients with locally advanced, unresectable, or metastatic non-small cell lung cancer (NSCLC) CT277 Tuesday, April 9 1:30 p.m. – 5 p.m. Section 50 Board #7 G. Blumenschein About Tislelizumab Tislelizumab is a uniquely designed humanized immunoglobulin G4 (IgG4) anti-programmed cell death protein 1 (PD‑1) monoclonal antibody with high affinity and binding specificity against PD‑1. It is designed to minimize binding to Fc-gamma (Fcγ) receptors on macrophages, helping to aid the body’s immune cells to detect and fight tumors. About BeiGene BeiGene is a global oncology company that is discovering and developing innovative treatments that are more affordable and accessible to cancer patients worldwide. With a broad portfolio, we are expediting development of our diverse pipeline of novel therapeutics through our internal capabilities and collaborations. We are committed to radically improving access to medicines for far more patients who need them. Our growing global team of more than 10,000 colleagues spans five continents, with administrative offices in Basel, Beijing, and Cambridge, U.S. To learn more about BeiGene, please visit and follow us on LinkedIn and X (formerly known as Twitter). Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and other federal securities laws, including statements regarding BeiGene’s ability to discover innovative new medicines for cancer patients and pioneer novel mechanisms; the future development, regulatory filing and approval, and commercialization of tislelizumab, BGB-16673, and other novel molecules; and BeiGene’s plans, commitments, aspirations, and goals under the heading “About BeiGene.” Actual results may differ materially from those indicated in the forward-looking statements as a result of various important factors, including BeiGene's ability to demonstrate the efficacy and safety of its drug candidates; the clinical results for its drug candidates, which may not support further development or marketing approval; actions of regulatory agencies, which may affect the initiation, timing, and progress of clinical trials and marketing approval; BeiGene's ability to achieve commercial success for its marketed medicines and drug candidates, if approved; BeiGene's ability to obtain and maintain protection of intellectual property for its medicines and technology; BeiGene's reliance on third parties to conduct drug development, manufacturing, commercialization, and other services; BeiGene’s limited experience in obtaining regulatory approvals and commercializing pharmaceutical products; BeiGene’s ability to obtain additional funding for operations and to complete the development of its drug candidates and achieve and maintain profitability; and those risks more fully discussed in the section entitled “Risk Factors” in BeiGene’s most recent annual report on Form 10-K, as well as discussions of potential risks, uncertainties, and other important factors in BeiGene's subsequent filings with the U.S. Securities and Exchange Commission. All information in this press release is as of the date of this press release, and BeiGene undertakes no duty to update such information unless required by law. View source version on businesswire.com: Contacts Investor: Liza Heapes +1 857-302-5663 ir@beigene.com Media: Kyle Blankenship +1 667-351-5176 media@beigene.com Source: BeiGene, Ltd. View this news release online at:

Data from the safety lead-in of the AIPAC-003 trial shows 90mg efti in combination with paclitaxel is safe and well toleratedEncouraging initial efficacy in six metastatic breast cancer patients, who exhausted all endocrine therapy including CDK4/6 inhibitors, demonstrated by a 50% overall response rate, including one complete response, and a 100% disease control rate SYDNEY, AUSTRALIA, March 05, 2024 (GLOBE NEWSWIRE) -- Immutep Limited (ASX: IMM; NASDAQ: IMMP) (“Immutep” or “the Company”), a clinical-stage biotechnology company developing novel LAG-3 immunotherapies for cancer and autoimmune disease, today announces safety and initial efficacy data from the first ever 90mg dosing of eftilagimod alpha (efti) in combination with weekly paclitaxel in patients from the safety lead-in (N=6) of the AIPAC-003 Phase II/III trial. Updated safety data from patients with HR-positive/HER2-negative/low metastatic breast cancer (MBC) treated with this innovative immuno-oncology (IO)-chemotherapy combination reveal no treatment-emergent serious adverse events. Additionally, all treatment-emergent adverse events during the safety observation period to date have been of mild severity. Initial efficacy reports show these six MBC patients, who exhausted all endocrine therapy including cyclin-dependent kinase 4/6 (CDK4/6) inhibitors, exhibited encouraging results achieving a 50% overall response rate, including one complete response and two partial responses, and a 100% disease control rate overall with the remaining three patients having stable disease as best response. Acknowledging the early nature of these results, efti with paclitaxel historically has shown a dose-dependent effect in MBC and has in some cases also led to stable disease patients becoming partial responders after six months. The biologically active 30mg efti dose, previously the highest dose of efti ever tested, has demonstrated a stronger immune response and greater efficacy than lower dosing levels (1mg, 6mg) in multiple clinical trials. The ongoing randomized Phase II portion of the trial, which will include up to 58 evaluable patients, is focused on whether 90mg efti dosing is safe and more efficacious than 30mg dosing. This portion of the trial has enrolled 23 patients to date. Importantly, the determination of the optimal biological dose in AIPAC-003 is directly tied to the FDA’s Project Optimus initiative and is relevant for the entire efti program. Further updates from AIPAC-003 will be provided in CY2024. For more information on the trial, please visit clinicaltrials.gov (NCT05747794). About Eftilagimod Alpha (Efti)Efti is Immutep’s proprietary soluble LAG-3 protein and MHC Class II agonist that stimulates both innate and adaptive immunity for the treatment of cancer. As a first-in-class antigen presenting cell (APC) activator, efti binds to MHC (major histocompatibility complex) Class II molecules on APC leading to activation and proliferation of CD8+ cytotoxic T cells, CD4+ helper T cells, dendritic cells, NK cells, and monocytes. It also upregulates the expression of key biological molecules like IFN-ƴ and CXCL10 that further boost the immune system’s ability to fight cancer. Efti is under evaluation for a variety of solid tumours including non-small cell lung cancer (NSCLC), head and neck squamous cell carcinoma (HNSCC), and metastatic breast cancer. Its favourable safety profile enables various combinations, including with anti-PD-[L]1 immunotherapy and/or chemotherapy. Efti has received Fast Track designation in first line HNSCC and in first line NSCLC from the United States Food and Drug Administration (FDA). About ImmutepImmutep is a clinical-stage biotechnology company developing novel LAG-3 immunotherapy for cancer and autoimmune disease. We are pioneers in the understanding and advancement of therapeutics related to Lymphocyte Activation Gene-3 (LAG-3), and our diversified product portfolio harnesses its unique ability to stimulate or suppress the immune response. Immutep is dedicated to leveraging its expertise to bring innovative treatment options to patients in need and to maximise value for shareholders. For more information, please visit www.immutep.com. Australian Investors/Media:Catherine Strong, Citadel-MAGNUS+61 (0)406 759 268; cstrong@citadelmagnus.com U.S. Media:Chris Basta, VP, Investor Relations and Corporate Communications+1 (631) 318 4000; chris.basta@immutep.com

Presentation will highlight publicly for the first time preclinical data on Bonum’s lead cLAG3-IL2 program, demonstrating the power of its conditionally active platform. SEATTLE--(BUSINESS WIRE)-- Bonum Therapeutics, a biopharmaceutical company that is using innovative technology for conditional regulation to create highly active and less toxic medicines, today announced the first public presentation of preclinical data on its lead program, a conditionally active LAG3-IL2 therapeutic. Scientists from Bonum will present these data in a poster at the upcoming American Association for Cancer Research (AACR) Annual Meeting 2024, taking place April 5-10 in San Diego, CA. Presentation details are as follows: Abstract Title: “A novel method for generating regulated cytokine therapeutics: Safety and activity of a conditionally active cLAG3-IL2 capable of delivering IL2 to LAG3+ cells while remaining inert on LAG3- cells.” Presenter: Justin Killebrew, PhD, Senior Director, Immuno-Oncology Discovery at Bonum Therapeutics Abstract Number: 4062 Date/Time: Tuesday, April 9, 2024, 9:00 AM - 12:30 PM PT Session Title: Immune Modulation with Cytokines The poster presentation will highlight a conditionally active therapeutic called cLAG3-IL2 that targets IL-2 to LAG3+ cells while remaining systemically inert, even at high treatment doses. The in vivo safety and efficacy data described in the poster demonstrate that this program is suitable for progressing into the clinic. John Mulligan, PhD, Bonum Therapeutics’ CEO, commented, “We are excited with the progress of our lead program, cLAG3-IL2, and are eager to make the first public presentation about the program at AACR.” The poster will be available on the Bonum website on the day of the presentation. Bonum is developing new therapies based on its proprietary platform of conditionally active therapeutics. The company is a spinout of Good Therapeutics, which developed the technology that Bonum is advancing. The merits of the platform were validated by the Roche acquisition of Good Therapeutics and its PD-1-regulated IL-2 program in September 2022. Bonum’s core platform enables the engineering and development of a broad array of important medicines. Initially, Bonum is applying the technology to regulated cytokines, including IL-12, IFN-alpha, and TGF-beta for immuno-oncology applications. In parallel, it is seeking partners for applications of its technology in other disease areas where the partner brings expertise in a specific biology and can help guide choices to create new therapies and reach patients as quickly as possible. About Bonum Therapeutics Bonum Therapeutics is a privately held biotechnology company focused on the generation of a new class of therapeutics based on a proven technology platform that utilizes principles of allosteric regulation to create highly active and less toxic medicines. The company was founded in 2022 as a spinout of Good Therapeutics, following the sale of Good to Roche in September 2022 for $250 million, plus significant milestones. Using a novel approach, Bonum’s molecules combine a sensor component directed against a specific biological marker and a therapeutic component. When the sensor binds its target, the molecule reversibly changes shape and becomes active, delivering potent activity only where it is needed. The technology is applicable to a wide range of therapeutic areas, including oncology, autoimmunity, metabolic disorders, and pain management. Bonum’s initial efforts are focusing on regulated immunocytokines, including conditionally active IFN-alpha, IL-12, and TGF-beta, while it pursues additional applications in partnership with others. The company is backed by a group of leading venture investors including Rivervest Venture Partners, Roche Venture Fund, Digitalis Ventures, American Century Investments, Codon Capital, and Vivo Capital. For more information, please visit our website at and connect with us on LinkedIn and X (Twitter). View source version on businesswire.com: Contacts Bonum Contact: Neela Patel, PhD Bonum Therapeutics (425) 375-5369 patel@bonumtx.com Source: Bonum Therapeutics View this news release online at: