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The Marshall Team

William Blair Private Wealth Management

Chicago skyline
  • Brian Marshall

    Brian Marshall

    Partner, Wealth Advisor

    +1 312 364 8109
    View profile
  • Jon Sackett

    Jon Sackett

    Wealth Advisor Associate

    +1 312 364 8433
    View profile
  • mattwilson

    Matthew J. Wilson

    Sales Associate

    +1 312 364 5157
    View profile
  • James Hammack

    James Hammack

    Client Relationship Associate

    +1 312 364 8773
    View profile

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.*

  • 1935

    Year William Blair was founded

  • 2,000+

    Employees worldwide

  • 145 billion+

    Client assets

  • 90 Years

    Independent and employee-owned

  • 20+

    Offices worldwide

  • 650+

    Companies under coverage

As of June 30, 2025
*Includes strategic partnerships with Allier Capital, BDA Partners, and Poalim Capital Markets.

More about William Blair affiliated entities

Thought Leadership

  • Girl with a backpack on looking at a lake
    Monday, June 2, 2025

    Estate Planning Documents for Your College-Age Children

    Estate planning is probably the last thing on your mind as your child settles into college. However, what many parents do not consider is that once a child turns 18, he or she is legally recognized as an adult in most states.

    Read more
  • Friday, July 11, 2025

    One Big Beautiful Bill Act: What You Need to Know

    The One Big Beautiful Bill Act (OBBBA) marks a significant shift in the landscape of American tax policy. Learn the new rules under the OBBBA, along with the effective date of the changes.

    Read more
  • Monday, September 15, 2025

    Managing Risk Through Life’s Milestones

    Five steps to ensuring your life insurance continues to serve your needs.

    Read more
See more thought leadership

Our Latest News

  • Monday, October 20, 2025

    William Blair Initiates Coverage of Five Companies in the Rare Earth Industry

    William Blair initiated research coverage of USA Rare Earth, Inc. (USAR $28.54), United States Antimony Corporation (UAMY $12.56), American Resources Corporation (AREC $4.25), NioCorp Developments Ltd. (NB $8.30), and Royalty Management Holding Corporation (RMCO $2.96).

    Read more
  • Thursday, October 16, 2025

    Climb Bio, Inc.: Initiation of Research Coverage

    William Blair initiated research coverage of Climb Bio, Inc. (CLYM $1.88), which is developing high-impact medicines for patients living with autoimmune diseases, with the CD19 antibody budoprutug as its lead program.

    Read more
  • Wednesday, October 15, 2025

    William Blair Initiates Coverage of Two Oil and Gas Companies

    William Blair initiated research coverage of Expand Energy Corporation (EXE $102.68) and EQT Corporation (EQT $53.66), two leading natural gas producers with operations concentrated in the Appalachian Basin.

    Read more
See more news

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This content is for informational and educational purposes only and not intended as investment advice or a recommendation to buy or sell any security. Investment advice and recommendations can be provided only after careful consideration of an investor's objectives, guidelines, and restrictions.

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