Organization and Nature of Business

9 Months Ended

Sep. 30, 2016

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Organization and Nature of Business

1. Organization and Nature of Business

Aduro Biotech, Inc., or the Company, is an immunotherapy company focused on the discovery, development and commercialization of therapies that transform the treatment of challenging diseases. The Company’s technology platforms, which are designed to harness the body's natural immune system, are being investigated in cancer indications and have the potential to expand into autoimmune and infectious diseases. The Company operates in one business segment.

The Company has developed three technology platforms, Live, Attenuated, Double-Deleted, or LADD, STING Pathway Activator and B-select monoclonal antibodies. The Company’s LADD technology platform is based on proprietary attenuated strains of Listeria that have been engineered to express tumor-associated antigens to induce specific and targeted immune responses. This platform is being developed as a treatment for multiple indications, including mesothelioma, ovarian, pancreatic, lung and prostate cancers, and glioblastoma. The Company’s STING Pathway Activator platform is designed to activate the intracellular Stimulator of Interferon Genes, or STING, receptor, resulting in a potent tumor-specific immune response. The Company’s B-select monoclonal antibody platform includes a number of immune modulating assets in research and preclinical development and is led by the Company’s wholly owned subsidiary based in the Netherlands, Aduro Biotech Holdings, Europe B.V., or Aduro Biotech Europe. The Company is also collaborating with leading global pharmaceutical companies to expand its products and technology platforms.

Initial Public Offering and Concurrent Private Placement

On April 20, 2015, the Company closed its initial public offering, or IPO, and sold 8,050,000 shares of its common stock (inclusive of 1,050,000 shares of common stock pursuant to the full exercise of the underwriters’ option to purchase additional shares) at a price to the public of $17.00 per share. The Company received aggregate net proceeds of $124.2 million, net of underwriting discounts and offering expenses. The Company also sold to Novartis Institutes for BioMedical Research, Inc., or NIBR, in a concurrent private placement 1,470,588 shares of common stock at a price of $17.00 per share for proceeds of $25.0 million. Upon the closing of the IPO, all then-outstanding shares of convertible preferred stock converted by their terms into 51,822,659 shares of common stock. Additionally, the Company amended and restated its certificate of incorporation effective April 20, 2015 to, among other things, change the authorized number of shares of common stock to 300,000,000 shares and the authorized number of shares of preferred stock to 10,000,000 shares.