Principals
Managing members.
Five Stones is run directly by its two managing members.
Walter McDonald
Managing Member · Research & Trading Systems
Walter built the firm's trading system himself: the market data infrastructure, the machine-learning models that read the market, and the software that decides when to trade.
His background is in data science and machine learning.
Jake Fabry
Managing Member · Capital & Operations
Jake runs the business of the firm. He has spent more than twenty years building companies, raising capital, and leading the teams that run them.
An entrepreneur and author certified through Notre Dame's Transformational Leadership program, he oversees subscriptions, reporting, and firm operations. Investors work with him directly.