Data as of Q4 2025 (Dec 31, 2025)

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

โ€ขCIK: 1644956โ€ขFiling: Q4 2025

William Blair Investment Management, LLC, currently manages $35.9 billion in assets, with a focus on technology and growth stocks, as evidenced by top holdings like NVDA, TSM, and MSFT. Recently, the fund has made notable moves by adding MSI and MRVL with significant increases, while exiting positions in LYV and LRN, reflecting a strategy of capitalizing on high-growth opportunities and adjusting to market dynamics.

Total AUM
$35.9B
QoQ Performance
-7.3%
Positions
408
Top 10 Concentration
35.3%
Latest Filing
Q4 2025

Top Holdings Allocation

NVDA
TSM
NVDA5.5%
TSM5.1%
MSFT4.7%
AAPL4.1%
AMZN2.8%
GOOGL2.8%
AVGO2.4%
META2.2%

๐Ÿ“ˆ Biggest Buys

NOW
SERVICENOW INC
+474.5%
0.9% of portfolio
GOOGL
ALPHABET INC
+26.9%
2.8% of portfolio
ARGX
ARGENX SE
NEW
0.5% of portfolio
SNOW
SNOWFLAKE INC
+159.9%
0.8% of portfolio
HQY
HEALTHEQUITY INC
NEW
0.5% of portfolio

๐Ÿ“‰ Biggest Sells

CIEN
CIENA CORP
-55.0%
0.7% of portfolio
NVDA
NVIDIA CORPORATION
-8.1%
5.5% of portfolio
MSFT
MICROSOFT CORP
-9.0%
4.7% of portfolio
SE
SEA LTD
-31.5%
0.8% of portfolio
TSM
TAIWAN SEMICONDUCTOR MFG LTD
-6.8%
5.1% of portfolio

Sector Breakdown

Other65.4%
Technology26.0%
Consumer4.6%
Financial1.9%
Healthcare0.9%
Materials0.8%
Communication0.4%

๐Ÿšช Exited Positionssold since Q3 2025

UBER
UBER TECHNOLOGIES INC
SOLD
$259.1M
LRCX
LAM RESEARCH CORP
SOLD
$246.9M
LYV
LIVE NATION ENTERTAINMENT IN
SOLD
$228.8M
LRN
STRIDE INC
SOLD
$225.1M
RY
ROYAL BK CDA
SOLD
$211.2M
+224 more exited positions

Changes from Q3 2025

NEW15 new positions
โ†‘70 increased
โ†“115 decreased

Historical Filings

Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023