Investing in the William Blair Funds is very simple!

Everything you need is on this web site…

If you are ready to set up a new account online, click here.

If you would prefer to print out, complete and mail in an application, please follow the instructions below.

  1. Decide which Fund is right for you.
    (Click here to learn more about the Funds)

  2. Read the Fund's prospectus.
    (Click here to download a Fund's prospectus)

  3. Determine how much you would like to invest.

    Minimum investments are as follows:
    Class N Shares:  $2,500
    Class N Shares Individual Retirement Accounts (IRAs):  $2,500


    Class I Shares:  $500,000
    Class I Shares Individual Retirement Accounts and other similar retirement accounts (see the Funds' prospectus for more details): No minimum investment


    Institutional Funds / Institutional Class Shares:  $5,000,000

  4. Download a Fund Application. (For Institutional Funds / Institutional Class Shares, please use the “Institutional Funds”)
    (Click here to select an application form)

  5. Mail your completed application, and a check with the amount of your investment payable, to:
William Blair Funds
P.O. Box 219137
Kansas City, MO 64121-9137

For overnight mail:
William Blair Funds
430 W. 7th Street, Suite 219137
Kansas City, MO 64105-1407

If you are wiring funds, first call State Street Bank & Trust Co. at 1-800-635-2886 (Massachusetts 1-800-635-2840) for an account number. Then instruct your commercial bank to wire federal funds to:

State Street Bank & Trust Co.
ABA #011000028 DDA #99029340
Attn: Custody & Shareholder Services
225 Franklin Street
Boston, MA 02110

Need help? Call us with your questions or for assistance getting started at 1-800-635-2886 or 1-800-742-7272.