About William Blair

William Blair is a global investment banking and asset management firm. We are committed to building enduring relationships with our clients and providing expertise and solutions to meet their evolving needs. An independent and employee-owned firm, William Blair is based in Chicago and, together with its strategic partners, operates in more than 20 offices worldwide.

*Includes strategic partnerships with Allier Capital, BDA Partners, and Poalim Capital Markets.

More about William Blair affiliated entities



Our Company – At a Glance
As of December 31, 2017

  • Founded in 1935 by William McCormick Blair
  • Independent and employee-owned
  • Over 1,400 employees
  • More than $93.4 billion in client assets
  • Investment Banking transactions have covered more than 40 countries, 800 companies, and $269 billion in value since January 2013*
  • Research coverage comprises over 600 companies*
  • Market maker for more than 1,775 listed stocks and 575 preferred stocks*
  • Limited third-party debt on our balance sheet; equity comes from capital investment by our partners
  • Memberships: Financial Industry Regulatory Authority (FINRA)*, Securities Investor Protection Corporation (SIPC)*, National Futures Association (NFA)**

*William Blair & Company, L.L.C.
**William Blair Investment Management, LLC

Leadership - John Ettelson


Consistency and continuity in leadership is a hallmark of our firm. Since the firm’s founding in 1935, William Blair & Company has had five CEOs or managing partners, three of whom continue to work at the firm.
Community Impact

Community Engagement

We are committed to being a long-term partner to the communities where we live and work.
History - William Blair


“ When our clients succeed, the firm’s success will follow.” The words of our founder, William McCormick Blair, are as relevant and influential today as they have ever been. As our firm continually grows and evolves to meet the needs of a dynamic global marketplace, we are guided by a steadfast focus on our clients’ objectives.