Simon Fennell
Partner, Portfolio Manager
About Simon
Simon Fennell, partner, is a portfolio manager for William Blair’s International Growth, International Small Cap Growth, and International Leaders strategies. He joined William Blair in 2011 as a technology, media, and telecommunications research analyst focusing on idea generation and strategy more broadly.
Before joining William Blair, Simon was a managing director in the equities division at Goldman Sachs in London and Boston, responsible for institutional equity research coverage for European and international stocks. Previously, Simon was in the corporate finance group at Lehman Brothers in London and Hong Kong, working in the M&A and debt capital markets groups.
Simon received an M.A. from the University of Edinburgh and an M.B.A. from Cornell University’s Samuel Curtis Johnson Graduate School of Management.
Why We Invest Shapes How We Invest
Culture is more than the ethos that characterizes our organization; it’s the engine that guides our practices. Our people are defined by their shared values and curiosity. Our approach is defined by teamwork; a disciplined, proven methodology; and technology-enhanced collaboration. Our purpose is defined by a focus on our clients and communities. But don’t take our word for it. See what culture means to our colleagues.
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About William Blair
William Blair is a premier global partnership with expertise in investment banking, investment management, and private wealth management. We provide advisory services, strategies, and solutions to meet our clients’ evolving needs. As an independent and employee-owned firm, together with our strategic partners, we operate in more than 20 offices worldwide.*
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1935Year William Blair was founded
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1,900+Employees worldwide
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139 billion+Client assets
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90 YearsIndependent and employee-owned
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20+Offices worldwide
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~650Companies under coverage
As of March 31, 2025
*Includes strategic partnerships with Allier Capital, BDA Partners, and Poalim Capital Markets.