OneSource Specialty Pharma Limited, a biopharmaceutical company, engages in the research, development, manufacture, and commercialization of biological drug products in various injectable formats in India and internationally. The company provides end-to-end CDMO services across various phases of preclinical and clinical development and commercial supply of biologics. It also offers drug-devices, including prefilled syringes, dial and push variable and fixed dose pen injectors, pull push fixed dose pens, and autoinjectors; sterile injectables; soft gelatin capsules; and biologics solutions for microbial and mammalian cell line biopharmaceuticals, cell and gene therapy, and RNA products. OneSource Specialty Pharma Limited was formerly known as Stelis Biopharma Limited and changed its name to OneSource Specialty Pharma Limited in February 2024. The company was incorporated in 2007 and is based in Bengaluru, India.