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 of 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.

Benjamin Allen is the Chief Executive Officer of Parnassus Investments and Portfolio Manager of the Parnassus Core Equity Fund. Mr. Allen is responsible for Parnassus’s long-term strategic direction, products and personnel. He is also responsible for portfolio management for the firm’s Core Equity strategy. He joined Parnassus Investments in 2005 as a Senior Research Analyst after serving as a Parnassus research intern. In 2008, Mr. Allen was promoted to Director of Research and subsequently became Portfolio Manager of the Parnassus Core Equity Fund in 2012. Prior to joining the firm, Mr. Allen worked at Morgan Stanley in New York, first as an Investment Banking Analyst and later in the firm's venture capital group. Mr. Allen graduated Phi Beta Kappa and magna cum laude from Georgetown University with a bachelor's degree in government and completed the general course in philosophy at the London School of Economics. He received his master's degree in business administration from the University of California, Berkeley.

Andrew Choi is a Portfolio Manager of the Parnassus Core Equity Fund and a Senior Research Analyst. Mr. Choi has responsibility for portfolio management for the firm’s Core Equity strategy and firmwide research. Mr. Choi joined Parnassus as a Senior Research Analyst in 2018 after serving as a Parnassus research intern. Prior to joining Parnassus, Mr. Choi worked at Deloitte Consulting as a Business Analyst. Mr. Choi received his bachelor’s degree in Chemistry from Princeton University and his master’s degree in business administration from Harvard Business School.