Todd Ahlsten is the Chief Investment Officer of Parnassus Investments, an investment management firm headquartered in San Francisco, CA. He is responsible for overseeing all aspects of the firm’s strategies, including mentoring investment staff, managing investment risk, and acting as the final arbiter on ESG decisions. Ahlsten is also the Lead Portfolio Manager of the Parnassus Core Equity Fund. He has worked at Parnassus his entire investing career starting in 1995.