In 1983, John Osterweis founded Osterweis Capital Management to manage assets for individuals, families, endowments, and institutions. Now in our fourth decade, we are an integrated firm with over sixty employees, managing $7.2 billion in assets.

Our clients, many of them with us for decades, know we have gotten here through an unwavering commitment to one purpose: To protect and grow our clients’ capital for the enduring security of multiple generations.

Osterweis is an investment adviser and is privately held by a number of employees and two outside directors. 

Our Team

We are an independently owned firm, which allows us to keep our clients’ interests at the forefront. We value original thinking, discipline, honesty, integrity, and excellence.


We believe our clients’ financial goals are best achieved by the avoidance of major losses in falling markets and the compounding of reasonable gains in rising markets.


Over time we have carefully managed the firm to meet the evolving needs of our clients.

The Osterweis Funds and other products and services described on this website are intended to be made available to U.S. investors only. Shares of the Funds are currently offered only in the United States and are not available for sale in any jurisdiction other than the United States. The information on this website is neither an offer to sell nor a solicitation of an offer to buy a mutual fund, security or service in any jurisdiction in which such offer, solicitation, purchase or sale would be unlawful. Please read these Terms and Conditions.

The Osterweis Funds are available by prospectus only. The Funds’ investment objectives, risks, charges and expenses must be considered carefully before investing. The summary and statutory prospectuses contain this and other important information about the Funds. You may obtain a summary or statutory prospectus by calling toll free at (866) 236-0050, or by visiting Please read the prospectus carefully before investing to ensure the Fund is appropriate for your goals and risk tolerance.

Mutual fund investing involves risk. Principal loss is possible.

Osterweis Capital Management is the adviser to the Osterweis Funds, which are distributed by Quasar Distributors, LLC.