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 earned an MBA from Harvard Business School and 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 LLP. Jim holds a JD from Harvard Law School and a BS in Biochemistry and Molecular Biology from Harvard University.

  • Mike Sapnar Head of Insurance Solutions

    Mike Sapnar is the Global Head of Insurance Solutions at Stone Ridge Asset Management. Prior to joining Stone Ridge, Mike served as the President and CEO of Transatlantic Reinsurance for nearly 10 years and held various positions domestically and internationally during his 26-year tenure. He started his career at Continental Insurance. Mike has served as Chairman of the RAA and BRMA and as a Director of Pillar Capital Holdings. He is currently a Trustee for The William & Mary Foundation. Mike holds a BA in Economics from the College of William & Mary and earned an MBA in Finance from New York University.

  • Ross Stevens Founder and CEO

    Ross Stevens founded Stone Ridge in 2012, and serves as Chief Executive Officer. Ross founded the New York Digital Investment Group (NYDIG) in 2017, and serves as its Executive Chairman. 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 founded and serves as the Advisory Board Chairman of the Stevens Center for Innovation in Finance at the University of Pennsylvania (Wharton).

  • 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.

  • Yan Zhao Head of Investment Committee

    Yan Zhao is a co-founder of Stone Ridge, the President of Stone Ridge Holdings Group, and serves on the Stone Ridge Asset Management 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 holds an MBA from Harvard Business School and a BA in Economics from Harvard University.

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