Alphamab Oncology Completed Enrollment in the First Pivotal Phase III Clinical Study of the Bispecific Antibody KN046

ENREACH-LUNG-01 is a multi-center,randomized,double-blind,placebo-controlled phase III clinical study of KN046 combined with platinum-containing chemotherapy in patients with advanced unresectable or metastatic squamous NSCLC. Enrollment of all 482 patients has been completed according to the study design in 61 clinical research centers nationwide.

SUZHOU,China,Oct. 18,2021 --Alphamab Oncology (stock code: 9966.HK),announced that the first phase III pivotal clinical study of PD-L1/CTLA-4 bispecific antibody KN046 in China (ENREACH-LUNG-01) has successfully completed enrollment of all patients. A first interim analysis is going to be performed in the first quarter of 2022. Based on the data,the process of a first BLA submission of KN046 for the treatment of squamous NSCLC will be discussed with authorities and might be submitted as early as 2022.

ENREACH-LUNG-01 is a multicenter,placebo-controlled phase III clinical study of KN046(5 mg/kg) combined with platinum-containing chemotherapy in patients with advanced unresectable or metastatic squamous NSCLC to evaluate the safety and efficacy over standard treatments. 482 patients were enrolled in 61 clinical research centers nationwide.

The principal investigator Professor Caicun Zhou,Director of the Department of Oncology from Shanghai Pulmonary Hospital Affiliated to Tongji University,commented,"We are very pleased to lead the ENREACH-LUNG-01 study,which is the first phase III clinical study of a bispecific antibody for the treatment of NSCLC in China. Lung cancer is one of the most common malignant tumors globally and poses a great threat to human health. Patients with advanced lung cancer have poor prognosis and there is an urgent need to improve the overall survival. Through this clinical study,we hope that the bispecific antibody KN046 could bring long-term survival benefits to patients. We look forward to evolving a new treatment option for lung cancerand bringing significant clinical benefits to more advanced lung cancer patients in need."

Dr. Ting Xu,Chairman and CEO of Alphamab Oncology,"The successful completion of patient enrollment in ENREACH-LUNG-01 is an important milestone in the clinical development and commercialization of KN046. We believe that KN046 combined with chemotherapy can bring better treatment options for advanced squamous NSCLC patients. We sincerely thank the investigators and patients who participated in this clinical trial. We look forward to seeing data from first interim analysis,and the company is well prepared for the BLA of KN046 planned to be submitted in 2022 after discussions with authorities."

About KN046

KN046 is PD-L1/CTLA-4 bispecific antibody independently developed by Jiangsu Alphamab. Its innovative designs include: a novel mechanism CTLA-4 domain fused with a PD-L1 single domain antibody; engineered to target the tumor microenvironment with high PD-L1 expression,and Treg(suppress tumor immunity)clearing function.

There are about 20 clinical trials of KN046 in different stages covering more than 10 types of tumors including NSCLC,thymic cancer,pancreatic cancer,HCC,ESCC and TNBC in Australia and China. The results of these clinical trials have shown promising data in terms of survival for patients. Alphamab Oncology has received FDA clearance to enter later stage trials of KN046 based on the clinical results in China and Australia. Moreover,KN046 has obtained the U.S. FDA's orphan drug designation for thymic epithelial tumor in September 2020. Four pivotal clinical trials are currently being conducted.

About Alphamab Oncology

Alphamab Oncology is focusing on innovation,production and commercialization of anti-tumor drugs. On December 12,2019,the Company was listed in the mainboard of Hong Kong Stock Exchange with stock code 9966.

Alphamab has fully integrated proprietary biologics platforms in bi-specifics and protein engineering. Its highly differentiated in-house pipeline includes fifteen tumor monoclonal antibodies and bispecific antibodies and a Covid-19 bispecific antibody. Four products have advanced into phase I-III clinical trials or pre-marketing stage in China,the United States,Japan and Australia. The BLA for Envafolimab (KN035) has been accepted and granted Priority Review by the National Medical Products Administration (NMPA).

The Company also has state-of-the-art manufacturing capabilities designed and built to meet NMPA and EU/FDA's cGMP standards and a complete quality system which has passed the on-site inspection of a European Union qualified person. Alphamab Oncology is committed to building a global leading,multi-dimensional drug development and commercialization platform,focusing on multifunctional biological innovative drugs,and to benefit patients in China and around the world.

Visit http://www.alphamabonc.comfor more information.