Wealth Manager
    SEC Registered
    Manages Private Funds

    William Blair & Company L.L.C.

    Registered investment advisor · Chicago, Illinois · CRD #1252

    Assets Under Management
    $64.3B
    Client Accounts
    39,781
    Employees
    492
    CRD Number
    1252
    Registration
    SEC Registered
    Custodian
    National Financial Services Llc

    Source: SEC Form ADV filings. Data as of 2026-07-06.

    About William Blair & Company L.L.C.

    William Blair & Company, L.L.C., founded in 1935 in Chicago, is an independent, employee-owned global investment banking and asset management firm. The company operates from its headquarters at The William Blair Building and has a strong presence with offices across the U.S. and internationally. William Blair offers a wide range of financial services, focusing on wealth management, investment banking, and institutional asset management. Its wealth management services cater to high-net-worth in

    Fee Structure

    Percentage of assets under management Yes
    Fixed fees Not reported
    Hourly charges Yes
    Performance-based fees Yes

    Contacts, 13F holdings & brochure intel for William Blair & Company L.L.C.

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    Frequently Asked Questions

    What is William Blair & Company L.L.C.'s AUM?

    William Blair & Company L.L.C. reports approximately $64.3B in regulatory assets under management, based on its most recent SEC Form ADV filing.

    Where is William Blair & Company L.L.C. headquartered?

    William Blair & Company L.L.C. is headquartered in Chicago, Illinois.

    What is William Blair & Company L.L.C.'s CRD number?

    William Blair & Company L.L.C.'s CRD number is 1252. You can use it to look up the firm's full regulatory record on the SEC's Investment Adviser Public Disclosure site.

    How many accounts does William Blair & Company L.L.C. manage?

    William Blair & Company L.L.C. manages approximately 39,781 client accounts according to its latest SEC filing.

    Is William Blair & Company L.L.C. SEC registered?

    Yes, William Blair & Company L.L.C. is registered with the SEC as an investment adviser with an approved registration status.

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