About William Blair Investment Management

William Blair Investment Management, the asset management business of William Blair & Company, L.L.C., is committed to building enduring relationships with our clients and providing expertise and solutions to meet their evolving needs. We work closely with private and public pension funds, insurance companies, endowments, foundations, sovereign wealth funds, high-net-worth individuals and families, as well as financial advisors. William Blair is 100% active-employee-owned with broad-based ownership. Our investment teams are solely focused on active management and employ disciplined, analytical research processes across a wide range of strategies, including U.S. equity, non-U.S. equity, fixed income, multi-asset, and alternatives. As of 31 December 2017, William Blair manages $73.6 billion in assets. William Blair is based in Chicago with an investment management office in London and service offices in Zurich and Sydney. 

Firm Highlights

  • Fundamentally driven approach to actively managed investing
  • Experienced, long-tenured investment professionals
  • Independent and employee-owned firm
  • Firm Overview


ESG Integration Philosophy

At William Blair, we consider environmental, social, and corporate governance (ESG) to be one of many considerations that inform our investment decisions.

Learn more about our ESG integration philosophy

Read an overview on ESG investing and portfolio integration