Institutional Fund
William Blair Investment Management, LLC
Chicago, ILCIK 16449565 filings on record
Portfolio Value
$30.26B
Q1 2026
Holdings
413
Reported positions
New Buys
47
Opened this quarter
QoQ Change
-15.6%
from $35.85B
Portfolio Value Trend
Reported 13F value by quarter
Portfolio value trend — upgrade to see history
UpgradeTop Allocations
Largest positions by weight
- Taiwan Semiconductor Mfg Ltd6.2%
- Nvidia Corporation5.2%
- Apple Inc4.0%
- Microsoft Corp3.5%
- Alphabet Inc2.4%
- Broadcom Inc2.3%
- Other76.5%
Portfolio Holdings
413 positions · Q1 2026
| # | Security | Shares | Value | % Port. | Δ Shares | Activity |
|---|---|---|---|---|---|---|
| 1 | Taiwan Semiconductor Mfg Ltd | 5.52M | $1.87B | 6.2% | −467.1K | Reduced |
| 2 | Nvidia Corporation | 8.94M | $1.56B | 5.2% | −1.69M | Reduced |
| 3 | Apple Inc | 4.81M | $1.22B | 4.0% | −631.9K | Reduced |
| 4 | Microsoft Corp | 2.90M | $1.07B | 3.5% | −593.5K | Reduced |
| 5 | Alphabet Inc | 2.50M | $720.22M | 2.4% | −650.4K | Reduced |
| 6 | Broadcom Inc | 2.20M | $681.40M | 2.3% | −335.1K | Reduced |
| 7 | Amazon Com Inc | 3.16M | $658.89M | 2.2% | −1.22M | Reduced |
| 8 | Meta Platforms Inc | 1.01M | $579.64M | 1.9% | −173.6K | Reduced |
| 9 | Mastercard Incorporated | 1.06M | $529.96M | 1.8% | −24.3K | Reduced |
| 10 | Astrazeneca PLC | 1.94M | $377.34M | 1.2% | +1.94M | New |
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