William Blair Investment Management, LLC
Chicago, IL·SEC-registered · CRD #173961
William Blair Investment Management, LLC is an SEC-registered investment advisory firm in Chicago, IL managing $66B across 682 client accounts, with 142 advisory staff.
Regulatory snapshot
Verify on SEC.govRegulatory AUM
$66B
Client accounts
682
Advisory staff
142
Fee model
Fee-only
How William Blair Investment Management, LLC is paid
Compensation arrangements disclosed on Form ADV. A fee-only firm earns fees only from clients — no product commissions.
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Common questions about William Blair Investment Management, LLC
How much does William Blair Investment Management, LLC manage?
Per its most recent SEC Form ADV filing (04/09/2026), William Blair Investment Management, LLC reports $66B in regulatory assets under management across roughly 682 client accounts.
How does William Blair Investment Management, LLC charge?
William Blair Investment Management, LLC is a fee-only firm. Its disclosed compensation arrangements are: % of assets. Exact fee schedules appear in the firm's Form ADV Part 2 brochure — confirm current fees directly with the firm.
Is William Blair Investment Management, LLC a fiduciary?
Yes. William Blair Investment Management, LLC is registered with the U.S. Securities and Exchange Commission (CRD #173961), and SEC-registered investment advisers owe a fiduciary duty to act in their clients' best interest. You can verify its registration and any disclosures on the SEC's public record.
Is William Blair Investment Management, LLC taking new clients like me?
Availability and account minimums vary and aren't in the public filing. The fastest way to find out is the free 2-minute match — it checks William Blair Investment Management, LLC and comparable advisors against your goals and assets, and only surfaces firms open to your situation.
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Profile compiled from William Blair Investment Management, LLC's public SEC Form ADV filing (CRD #173961, filed 04/09/2026). AdvisoryReviews is an independent comparison and matching service and is not affiliated with, endorsed by, or a partner of William Blair Investment Management, LLC. Listing does not imply any relationship. Figures are as reported to the SEC and may have changed; verify current details at adviserinfo.sec.gov. Are you with William Blair Investment Management, LLC? Claim this profile.