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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 30 offices worldwide.*

  • 1935

    Year William Blair was founded

  • 1,950+

    Employees worldwide

  • 145 billion+

    Client assets

  • 90+ Years

    Independent and employee-owned

  • 30+

    Offices worldwide*

  • 700+

    Companies under coverage

As of March 31, 2026
*Includes strategic alliances with Allier Capital, BDA Partners, and Poalim Equity Ltd.

More about William Blair affiliated entities

Thought Leadership

  • Back of students' heads wearing caps and gowns
    Wednesday, May 13, 2026

    College Was Awesome. Now What?

    College graduation marks the start of a career with new responsibilities and decisions. It can be an exciting time but filled with uncertainty.

    Read more
  • Wednesday, April 1, 2026

    Asset Allocation: Your Biggest Investment Decision

    Building a portfolio involves countless decisions. But none is more important than how you allocate your wealth across asset classes. This white paper describes the process of developing a customized asset-allocation strategy, achieving meaningful diversification across and within asset classes, and monitoring allocations and reviewing portfolios.

    Read more
  • Wednesday, January 14, 2026

    2026 Wealth Planning and Philanthropy Strategies

    As we kick off 2026, now is the time to review your financial strategy and position yourself for success in the year ahead.

    Read more
See more thought leadership

Our Latest News

  • Wednesday, May 20, 2026

    Casey's General Stores, Inc.: Initiation of Research Coverage

    William Blair initiated research coverage of Casey’s General Stores, Inc. (CASY $855.87), a U.S.-based convenience store chain that primarily operates across the Midwest and South and offers fuel, groceries, general merchandise, and freshly prepared food—most notably its made-from-scratch pizza.

    Read more
  • Tuesday, May 19, 2026

    365 Retail Markets Has Acquired Cantaloupe

    William Blair acted as financial advisor to 365 Retail Markets, LLC, a portfolio company of Providence Equity Partners L.L.C., in connection with its acquisition of Cantaloupe, Inc. (NASDAQ: CTLP).

    Read more
  • Monday, May 18, 2026

    Presidio Production Company: Initiation of Research Coverage

    William Blair initiated research coverage of Presidio Production Company (FTW $11.25), an oil and gas company that acquires and operates mature wells in the U.S.

    Read more
See more news

Ready to start a conversation? Contact us today.

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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