John Cimaroli

About John

John Cimaroli is a partner at William Blair and a portfolio manager working with a select number of families and institutions to help meet their wealth advisory and investment management needs. He originally joined William Blair in 1998 as an equity research associate, analyzing individual businesses and making investment recommendations to institutions and individuals. He then left William Blair to attend the University of Chicago, where he received his M.B.A. After graduating, he worked at T. Rowe Price as an equities analyst in the healthcare sector and spent eight years as a principal at Rail-Splitter Capital Management, a long/short equity hedge fund before rejoining William Blair in 2013.

John is married with three children and enjoys golf, skiing and spending time with his family.

John is a member of the CFA Institute and the CFA Society of Chicago.

Professional Recognition and Awards

• Barron’s Top State-by-State Advisors in America 2023, 2025¹ 
• Forbes Best-in-State Advisors 2023, 2024²

¹ The ranking reflects the volume of assets overseen by the advisors and their teams, revenues generated for the firms and the quality of the advisors’ practices.
² The Forbes ranking algorithm is based on industry experience, interviews, compliance records, assets under management, revenue and other criteria by SHOOK Research, LLC, which does not receive compensation from the advisors or their firms in exchange for placement on a ranking. Investment performance is not a criterion.