Value investing redefined

The Oakmark family of mutual funds is an extension of Harris Associates’ value-focused approach to investing. For more about our selection of funds, visit

The Oakmark Funds

111 South Wacker Drive, Suite 4600
Chicago, Illinois 60606
1-800-OAKMARK (625-6275)

John Sitarz portrait

John A. Sitarz, CFA, CPA

Partner, Portfolio Manager and U.S. Investment Analyst

  • Portfolio Manager of the Oakmark Global Fund and the Oakmark Global Select Fund
  • Portfolio Manager of the Global, Global All Cap and Global Concentrated Strategies
  • Vice President, Oakmark Funds
  • B.S., University of Denver, 2012
  • Research Associate with Harris Associates, 2015-17; Research Assistant with Harris Associates, 2013-15; Audit Senior Assistant at Deloitte & Touche, 2012-13
  • 11 years investment experience
  • Joined Harris Associates in 2013

News + Insights

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Tony Coniaris and John Sitarz on “Business Breakdowns” (12.06.23)

December 6, 2023

Portfolio Managers Tony Coniaris and John Sitarz do a deep dive on the cable industry and share why they see value in a communication...

We do value investing differently

At Harris Associates, we don’t have an opinion about how equities will perform this year, if a recession will start or if the political parties will produce pro-growth candidates during the next election cycle. As long-term investors, we don’t think it matters.