Todd Ahlsten is the chief investment officer and lead portfolio manager of the Parnassus Core Equity Fund. Mr. Ahlsten has responsibility for portfolio management for the firm’s Core Equity strategy. He also oversees all the firm’s strategies, including mentoring investment staff, managing investment risk and acting as final arbiter on ESG decisions. He joined Parnassus Investments in 1995 as a research analyst after serving as a Parnassus research intern. In 1998, Mr. Ahlsten was promoted to director of research and subsequently became portfolio manager of the Parnassus Core Equity Fund in 2001. He became chief investment officer in 2008. Mr. Ahlsten received his bachelor's degree in business administration from the University of California, Berkeley with an emphasis in finance and accounting.