Alta Partners is a San Francisco-based venture capital firm specializing in biotechnology and life sciences investments. The firm primarily focuses on early to mid-stage companies, with a strong emphasis on Series A to Series C rounds. Alta Partners typically invests in innovative companies developing cutting-edge therapies, medical devices, and healthcare technologies.

Notable portfolio companies include Vir Biotechnology, eGenesis, and Transcarent. Alta Partners' investment philosophy centers on supporting groundbreaking scientific advancements and disruptive healthcare solutions. The firm leverages its extensive industry network and expertise to provide strategic guidance and operational support to its portfolio companies, helping them navigate the complex landscape of drug development and commercialization.