Todd Ahlsten is chief investment officer of Parnassus Investments and lead portfolio manager of the Parnassus Core Equity strategy. He is responsible for portfolio management of the firm’s Core Equity strategy. He also oversees all the firm’s strategies, including mentoring investment staff, managing investment risk and acting as an adviser and final arbiter on investment and sustainability-related decisions.

Benjamin Allen is chief executive officer of Parnassus Investments and portfolio manager of the Parnassus Core Equity strategy. He is responsible for Parnassus’s people, culture and direction as well as portfolio management of the firm’s Core Equity strategy.

Andrew Choi is the lead portfolio manager of the Parnassus Growth Equity strategy, a portfolio manager of the Parnassus Core Equity strategy and a senior analyst. He is responsible for portfolio management of the firm’s Growth Equity and Core Equity strategies. Andrew joined Parnassus Investments as a senior analyst in 2018 after serving as a Parnassus research intern. Prior to joining Parnassus, he worked at Deloitte Consulting as a business analyst. Andrew received his bachelor’s degree in chemistry from Princeton University and his MBA from Harvard Business School.