§ 13F · FUND PROFILE
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC.
Growth equity, international focus
AUM · $38.7B (13F)Positions · 414Turnover · 99% · Q1Filed · May 8, 2026
CONCENTRATION
31%
Top 10 holdings
NEW BUYS
+47
+$2.5B deployed
EXITS
0
No exits
SECTOR SHIFT
TECHNOLOGY → OTHER
-3pp · +6pp
3YR HIT RATE
—
Top-5 overlap
§ 01 · TOP HOLDINGS
The book · Q1 2026
FILED MAY 8, 2026
| # | Ticker | Name | Shares | $ value | % port | Δ Q1 |
|---|---|---|---|---|---|---|
| 1 | TSM | TAIWAN SEMICONDUCTOR MANUFAC | 5.52M | $1.9B | 6.2% | −8% |
| 2 | NVDA | NVIDIA CORPORATION | 8.94M | $1.6B | 5.2% | −16% |
| 3 | AAPL | APPLE INC | 4.81M | $1.2B | 4.0% | −12% |
| 4 | MSFT | MICROSOFT CORP | 2.90M | $1.1B | 3.5% | −17% |
| 5 | GOOGL | ALPHABET INC | 2.50M | $720M | 2.4% | −21% |
| 6 | AVGO | BROADCOM INC | 2.20M | $681M | 2.3% | −13% |
| 7 | AMZN | AMAZON COM INC | 3.16M | $659M | 2.2% | −28% |
| 8 | META | META PLATFORMS INC | 1.01M | $580M | 1.9% | −15% |
| 9 | MA | MASTERCARD INCORPORATED | 1.06M | $530M | 1.8% | −2% |
| 10 | AZN | ASTRAZENECA PLC | 1.94M | $377M | 1.2% | NEW |
§ 02 · SECTOR ALLOCATION
Where the money is
Other52.2% (+6pp)
Semiconductors17.3% (+1pp)
Technology13.6% (−3pp)
Health Care5.6% (−2pp)
Retail5.5% (−2pp)
Banking5.3%
§ 03 · THE WILLIAM SIGNAL
AC read
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC is a Quality / Compounder fund managing $38.7 billion in assets. The fund runs a broad portfolio of 414 positions, broad diversification across holdings, with the top 10 accounting for 31%. Trading activity is aggressive at 99% quarterly turnover, with 47 new positions and 0 exits last quarter. Top sector allocations: Other (52%), Semiconductors (17%), Technology (14%).
Read the full dossier →§ 04 · FILING HISTORY
Q-by-Q deltas
2 FILINGS
Q1 2026
Busy quarter
+47 buys · −0 exits · 361 changed
Q4 2025
Busy quarter
+46 buys · −0 exits · 364 changed
Q3 2025
Busy quarter
+46 buys · −0 exits · 366 changed
Q2 2025
Busy quarter
+38 buys · −0 exits · 374 changed