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WILLIAM BLAIR & COMPANY L.L.C.

Advisory

N·CHICAGO, IL

Data as of Feb 9, 2026 · Source: SEC Form ADV

Total AUM

$58.3B

1-Year AUM Growth

+19.8%

3-Year CAGR

+5.5%

Employees

201

Assets Under Management

Total AUM$58.3B

Discretionary AUM$52.9B

Non-Discretionary AUM$5.4B

Discretionary %90.7%

Total Clients37,515

Team

Total Employees201

Investment Advisers469

Employee Growth (1Y)-35.1%

Filing History

Total Filings on Record86

First FilingJan 31, 2001

Latest FilingFeb 9, 2026

🔒 Full AUM trend chart and 86 historical filings spanning 25+ years

Registration

Status—

Registration Date—

SEC RegisteredYes

Exempt ReportingNo

⚡ Succession Risk Score

Our proprietary 5-pillar model analyzes founder tenure, ownership concentration, AUM dependency, and more to score transition risk.

📊 Peer Benchmarking

See how this firm ranks against peers nationally and by state across AUM growth, efficiency, team size, and 16 other metrics.

👥 Owners & Officers

View the complete ownership structure from SEC Schedule A/B filings, including control persons and their tenure.

🏦 Client Demographics

Detailed breakdown of client types including individuals, high-net-worth, institutions, pension plans, and charitable organizations.

Get the full picture on WILLIAM BLAIR & COMPANY L.L.C.

Succession risk scoring, peer benchmarking, ownership structure, private fund details, and 20+ years of filing history.