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Parnassus Investments is a pioneer in responsible investing, founded in 1984. The firm is dedicated to building wealth responsibly for its clients by investing in companies that meet rigorous environmental, social, and governance (ESG) criteria alongside strong financial fundamentals. Parnassus offers a range of actively managed equity and fixed income mutual funds, aiming to achieve attractive long-term returns while making a positive impact. Their investment philosophy emphasizes high-quality businesses with sustainable competitive advantages and ethical practices.
The headquarters serves as the central hub for all investment management, research, client services, operations, and strategic decision-making for the firm.
Located in the prominent One Market Plaza complex, offering modern facilities and convenient access to the heart of San Francisco's financial community. The office space is designed to foster collaboration and focused research.
Parnassus cultivates a principled, collaborative, and intellectually stimulating work environment. The culture is deeply rooted in its ESG investment philosophy, attracting mission-driven individuals who are passionate about responsible investing and long-term value creation. Emphasis is placed on thorough research, ethical conduct, and teamwork.
The San Francisco headquarters is significant as it's the sole operational center for this pioneering ESG investment firm, from which all fund management and company strategy emanate. Its location in a major U.S. financial hub underscores its standing in the investment community.
Parnassus Investments operates primarily from its headquarters in San Francisco, USA. While it does not maintain physical branch offices globally, its mutual funds may invest in companies across global markets that meet its ESG and financial criteria. The firm serves a diverse client base, including individuals and institutions, interested in responsible investing, extending its reach beyond its physical location through its investment activities and client relationships.
1 Market Street, Suite 1600
San Francisco
CA
USA
No additional office locations available.
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As of April 2025, Parnassus Investments' leadership includes:
Parnassus Investments has been backed by several prominent investors over the years, including:
In the past year, Parnassus Investments has seen strategic additions to its team, reflecting continued growth and focus in specialized areas. No high-profile C-suite departures have been publicly announced during this specific period.
Discover the tools Parnassus Investments uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
Parnassus Investments commonly uses the email format combining the first initial of an employee's name followed by their last name.
[first_initial][last]@parnassus.com
Format
jdoe@parnassus.com
Example
90%
Success rate
PR Newswire • January 25, 2024
Parnassus Investments announced its recognition by Investor's Business Daily (IBD) as one of the Best Mutual Fund Families of 2024. This marks the fourth consecutive year Parnassus has received this honor, highlighting its consistent performance in the U.S. Equity and ESG categories....more
Parnassus Investments Blog • February 14, 2024
Parnassus portfolio managers discuss their approach to investing in the rapidly evolving field of Artificial Intelligence, emphasizing the importance of identifying companies with sustainable competitive advantages and responsible AI development practices within their ESG framework....more
Citywire • May 7, 2024
Parnassus Chief Investment Officer Todd Ahlsten discusses the firm's investment process and highlights key considerations within their ESG framework, offering insights into what metrics they prioritize when evaluating companies for long-term responsible investment....more
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