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  • Stone Ridge Firm Overview

    Stone Ridge focuses on delivering valuable, diversifying return streams sourced from alternative risk exposures – not alpha.  We believe strongly in markets and strongly in the link between risk and return.  We leverage this link to create global opportunities for portfolio enhancement with a family of risk-specific strategies spanning reinsurance, volatility, and alternative lending.

    Powered by a close-knit team – with experience in academia, capital markets, and alternative asset management – our investor solutions facilitate access to and execution of complex strategies, making them accessible and cost-effective.

    Stone Ridge is based in New York with a financial engineering practice in Beijing.

  • Stone Ridge Leadership
    • Samuel Donat
      COO
    • Dan Fleder
      Markets
    • Paul Germain
      Alternative Lending
    • Robert Gutmann
      Digital Asset Strategies
    • Ben Lawsky
      Regulatory Affairs
    • Alexander Nyren
      Reinsurance
    • Jim Rothwell
      CAO and Legal
    • Tomer Seifan
      Structured Investments
    • Ross Stevens
      CEO
    • Yan Zhao
      Flourish

    Samuel Donat, Chief Operating Officer

    Sam Donat is the Chief Operating Officer at Stone Ridge and is responsible for Technology, Operations and Recruiting at the firm.  Prior to joining Stone Ridge, Sam was the Global Head of Corporate Technology at Millennium Management and previously was a Director of Technology at SAC Capital.  Sam earned his BS in Computer Science from the California State University, Chico.

    Dan Fleder, Head of Markets

    Dan Fleder is the Chair of the Investment Committee and serves as Head of Markets and Head of Risk at Stone Ridge.  Dan was previously Head of Variance Risk Premium at Stone Ridge.  Dan received his PhD in Operations Research and MS in Statistics from the University of Pennsylvania (Wharton) and BSE in Engineering from the University of Pennsylvania (Engineering School).

    Paul Germain, Head of Alternative Lending

    Paul Germain is the Head of Alternative Lending at Stone Ridge.  Prior to joining Stone Ridge, Paul served as the Global Head of Prime Services at Credit Suisse.  Paul was previously a Partner at Goldman Sachs and Co-Head of the US Client Franchise in Prime Brokerage.  Paul earned an MBA from Harvard Business School and BSE in Management from University of Pennsylvania (Wharton).

    Robert Gutmann, Head of Digital Asset Strategies

    Robert Gutmann is a co-founder of Stone Ridge.  Robert has held a variety of leadership roles at Stone Ridge, including Head of Product Development and Execution and his current role as Head of Digital Asset Strategies.  Robert received his B.A.  in Mathematics and Music from Columbia University.

    Ben Lawsky, Head of Regulatory Affairs

    Ben Lawsky is the Head of Regulatory Affairs.  Prior to joining Stone Ridge, Ben was New York State's Superintendent of Financial Services, leading a 1,400-person regulatory body with responsibility for oversight of the more than 3,800 US and non-US banks and insurance companies with a nexus in NY.  In that role, Ben also spearheaded creation of the BitLicense, the first regulatory licensing scheme for digital currency businesses.  Ben is also a Visiting Scholar at Stanford University's Cyber Initiative, and was co-chair of NY Governor Andrew Cuomo's Cyber Security Advisory Board.  Ben holds a JD and a BA from Columbia University.

    Alexander Nyren, Head of Reinsurance

    Alexander Nyren is the Head of Reinsurance at Stone Ridge.  Prior to joining Stone Ridge, Alexander was a Principal in the insurance practice of Oliver Wyman, where he worked with reinsurers, insurers and government entities on risk management, underwriting and regulatory matters.  Previously, he structured catastrophe bond and quota share investments at Barclays Capital/Lehman Brothers.  Alexander earned an MPhil in Economics from the University of Cambridge and a BA in Applied Mathematics from Harvard University.

    Jim Rothwell, CAO and Head of Legal

    Jim Rothwell is the Chief Administrative Officer and the Head of Legal at Stone Ridge.  Prior to joining Stone Ridge, Jim was a partner in the Securities and Equity Derivatives Group at Davis Polk & Wardwell LLP.  Jim holds a JD from Harvard Law School and a BS in Biochemistry and Molecular Biology from Harvard University.

    Tomer Seifan, Head of Structured Investments

    Tomer Seifan is the Head of Structured Investments at Stone Ridge.  Prior to joining Stone Ridge, Tomer was the Head of Structuring and Solutions for Global Markets in the Americas at BNP Paribas.  Previously, Tomer led a variety of structuring and structured product groups at both BNP Paribas and Bank of America.  Tomer started his career in the Financial Institutions Group at Davis Polk & Wardwell.  Tomer received his JD from Georgetown University and his BA from Yale University.

    Ross Stevens, CEO

    Ross Stevens founded Stone Ridge in 2012, and serves as Chief Executive Officer.  Ross received his PhD in Finance and Statistics from the University of Chicago (Booth) and his BSE in Finance from the University of Pennsylvania (Wharton).

    Yan Zhao, Head of Flourish

    Yan Zhao is a co-founder of Stone Ridge.  Yan has held a variety of leadership roles at Stone Ridge, including Head of Reinsurance and her current role as Head of Flourish.  Yan holds an MBA from Harvard Business School and a BA in Economics from Harvard University.

PHOTOGRAPHY BY
G. Steve Jordan
Stone Ridge NY area