WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC logo

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Portfolio Analytics

Investment Analysis & Holdings Breakdown

Comprehensive portfolio analytics for WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC with $38.7B in long positions as of Q3 2025, 38% allocated to Technology, and 31% concentrated in top 10 positions.

Portfolio Value
$38.7B
Top 10 Concentration
31%
Top Sector
Technology (38%)
US Exposure
85%
Market Cap Focus
Large Cap
Countries
22

Composition Analysis

Portfolio breakdown by sector, industry, and market capitalization

Sector Allocation

Technology: 38.20%TechnologyConsumer Cyclical: 11.90%Consumer CyclicalFinancial Services: 10.70%Financial ServicesHealthcare: 10.10%HealthcareIndustrials: 10.00%IndustrialsCommunication Services: 5.20%Consumer Defensive: 3.00%Basic Materials: 2.40%Real Estate: 1.60%Energy: 1.30%Utilities: 0.40%ETF: 0.30%
Technology
38.20%
Consumer Cyclical
11.90%
Financial Services
10.70%
Healthcare
10.10%
Industrials
10.00%
Communication Services
5.20%
Consumer Defensive
3.00%
Basic Materials
2.40%
Real Estate
1.60%
Energy
1.30%
Utilities
0.40%
ETF
0.30%

Industry Breakdown

100 industries across all sectors

Semiconductors: 15.48%SemiconductorsSoftware - Application: 7.48%Software - ApplicationSoftware - Infrastructure: 6.70%Specialty Retail: 5.95%Internet Content & Information: 4.32%Consumer Electronics: 3.70%Banks - Regional: 3.58%Asset Management: 2.24%Medical - Diagnostics & Research: 2.22%Medical - Healthcare Information Services: 2.11%Biotechnology: 2.00%Financial - Credit Services: 1.70%Aerospace & Defense: 1.53%Banks - Diversified: 1.47%Medical - Devices: 1.45%Communication Equipment: 1.44%Hardware, Equipment & Parts: 1.18%Construction Materials: 1.13%Consulting Services: 1.10%Auto - Dealerships: 1.06%Computer Hardware: 1.01%Information Technology Services: 0.97%Chemicals - Specialty: 0.96%Discount Stores: 0.92%Restaurants: 0.86%Manufacturing - Metal Fabrication: 0.82%Industrial - Machinery: 0.81%Medical - Healthcare Plans: 0.81%Education & Training Services: 0.79%Medical - Care Facilities: 0.79%Waste Management: 0.77%Rental & Leasing Services: 0.74%Financial - Capital Markets: 0.72%Construction: 0.71%66 more: 15.24%66 more
Semiconductors
Technology
15.48%
Software - Application
Technology
7.48%
Software - Infrastructure
Technology
6.70%
Specialty Retail
Consumer Cyclical
5.95%
Internet Content & Information
Communication Services
4.32%
Consumer Electronics
Technology
3.70%
Banks - Regional
Financial Services
3.58%
Asset Management
Financial Services
2.24%
Medical - Diagnostics & Research
Healthcare
2.22%
Medical - Healthcare Information Services
Healthcare
2.11%
Biotechnology
Healthcare
2.00%
Financial - Credit Services
Financial Services
1.70%

Filter by Sector

Select a sector to filter industries

Market Cap Distribution

Mega Cap (> $200B): 29.87%Mega Cap (> $200B)Large Cap ($10B - $200B): 32.30%Large Cap ($10B - $200B)Mid Cap ($2B - $10B): 24.60%Mid Cap ($2B - $10B)Small Cap ($300M - $2B): 4.09%Micro Cap ($50M - $300M): 0.05%Nano Cap (< $50M): 1.45%N/A (ETF or Unknown): 7.64%
Mega Cap (> $200B)
29.87%
Large Cap ($10B - $200B)
32.30%
Mid Cap ($2B - $10B)
24.60%
Small Cap ($300M - $2B)
4.09%
Micro Cap ($50M - $300M)
0.05%
Nano Cap (< $50M)
1.45%
N/A (ETF or Unknown)
7.64%

Portfolio Concentration

Top 10 Holdings %
31.01%
Top 20 Holdings %
41.23%
Top 50 Holdings %
59.69%
Top 100 Holdings %
78.3%

Geographic Exposure

Portfolio breakdown by country of incorporation

Domestic (US)
84.84%
International
15.16%
Countries
22
Largest Int'l Market
Taiwan - 4.64%
United States of America
84.84% ($32.8B)
363 holdings
Taiwan
4.64% ($1.8B)
1 holdings
Canada
2.11% ($814.2M)
9 holdings
Uruguay
1.39% ($537.0M)
1 holdings
United Kingdom
1.39% ($536.8M)
4 holdings
Brazil
0.98% ($378.4M)
3 holdings
Bermuda
0.82% ($317.1M)
4 holdings
Peru
0.60% ($233.6M)
2 holdings
Luxembourg
0.53% ($203.3M)
2 holdings
Italy
0.49% ($191.4M)
1 holdings
Singapore
0.45% ($175.0M)
3 holdings
Switzerland
0.35% ($136.9M)
3 holdings

Holding Behavior

Investment patterns and position management analysis

Portfolio Stability & Commitment

Avg. Top 10
24.2 quarters
Avg. Top 20
18.8 quarters
Avg. All Positions
10.6 quarters
Median Holding Period
7 quarters
Persistence Rate
68.12%
Persistent Holdings Weight
80.33%
Persistent Positions
282
Longest Held
Varonis Systems, Inc. logo
Varonis Systems, Inc.VRNS - 40 quarters

Position Sizing & Influence

Current Quarter

Avg. New Position
0.10%
Avg. Position Weight
0.24%
Largest Position
Nvidia Corp logo
Nvidia CorpNVDA - 5.58%
Largest Ownership Stake
The Baldwin Insurance Group, Inc. Class A Common Stock logo
The Baldwin Insurance Group, Inc. Class A Common StockBWIN - 7.16%
Avg. Ownership Stake
1.00%
Ownership Stake >5%
8
Ownership Stake >1%
147

Historical (Since Q3 2015)

Avg. New Position
0.19%
Avg. Ownership Stake
1.75%
Largest Position
Nvidia Corp logo
Nvidia CorpNVDA - 5.58% (Q3 2025)
Largest Ownership Stake
Forum Energy Technologies, Inc. logo
Forum Energy Technologies, Inc.FET - 22.10% (Q1 2018)

Portfolio Turnover

Current Quarter

Turnover Ratio
11.5%
Value Traded
$4.46B
Positions Added
25
Positions Exited
48

Historical (Since Q3 2015)

Avg. Turnover Ratio
12.3%
Avg. Positions Added
35
Avg. Positions Exited
36
Highest Turnover
50.0%
Q3 2015
Lowest Turnover
7.6%
Q1 2019

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