Aptorum Group Limited, through its subsidiaries, a clinical stage biopharmaceutical company, engages in the discovery, development, and commercialization of therapeutic products to treat oncology and infectious diseases. Its pipeline products include SACT-1, a repurposed drug candidate, which is in phase 1 clinical trial to treat neuroblastoma and other cancer types; ALS-4, a repurposed small molecule, which is in phase 1 clinical trial for the treatment of bacterial infections, such as staphylococcus aureus, mycobacterium tuberculosis, and pseudomonas aeruginosa; and RPIDD, a liquid biopsy rapid pathogen diagnostic which is in preclinical trial to treat pathogen molecular diagnostics. The company also develops SACT-COV19, a repurposed small molecule which is in preclinical trial for the treatment of coronavirus disease; SACT-2 and SACT-3; ALS-1, a small molecule which is in preclinical trial to treat bacterial infections caused by staphylococcus aureus, including methicillin-resistant staphylococcus aureus (MRSA); and ALS-2/3, a small molecule which is in preclinical trial for the treatment of gram+ve bacterial infections.