Stone Ridge Asset Management
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We have a fundamental, bedrock view that our people are everything. It's not surprising that since our firm's inception we have had a purposeful philosophy about our hiring and culture.

Our Leadership

  • Paul Germain President

    Paul Germain is the President of Stone Ridge Asset Management. 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 received his MBA from Harvard Business School and his BSE in Management from University of Pennsylvania (Wharton). 

  • 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 where he spent 23 years. Jim received his JD from Harvard Law School and his AB in Biochemistry and Molecular Biology from Harvard University.

  • Mike Sapnar Head of Insurance Solutions

    Mike Sapnar is the CEO of Longtail Re and Short Tail Re and the Global Head of Insurance Solutions at Stone Ridge. Prior to joining Stone Ridge, Mike served as the President and CEO of Transatlantic Reinsurance for nearly ten years and held various positions domestically and internationally during his 26-year tenure. Mike has served as Chairman of the Reinsurance Association of America (RAA) and Brokers & Reinsurance Markets Association (BRMA). Mike received his BA in Economics from the College of William & Mary and his MBA in Finance from New York University.

  • Ross Stevens Founder and CEO

    Ross Stevens is the Founder and CEO of Stone Ridge Holdings Group. Ross started his career at Goldman Sachs after receiving his PhD in Finance and Statistics from the University of Chicago (Booth) and his BSE in Finance from the University of Pennsylvania (Wharton). Ross’ philanthropy focuses on human excellence and human rights, including establishing Wharton’s Stevens Center for Innovation in Finance, enhancing Booth’s PhD program (renamed Stevens Doctoral Program), and empowering activists in authoritarian countries with bitcoin.

  • 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. 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.

  • Yan Zhao Head of Investment Committee

    Yan Zhao is a co-Founder and President of Stone Ridge Holdings Group and Head of the Investment Committee. Yan has held a variety of leadership roles at Stone Ridge, including President of NYDIG, CEO of Flourish, and Head of Reinsurance. Prior to Stone Ridge, Yan worked at the Boston Consulting Group and Morgan Stanley. Yan received her MBA from Harvard Business School and her BA in Economics from Harvard University.

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