§ 13F · FUND PROFILE
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC.
Growth equity, international focus
AUM · $33.3B (13F)Positions · 403Turnover · 99% · Q1Filed · Aug 12, 2026
CONCENTRATION
31%
Top 10 holdings
NEW BUYS
+47
+$2.3B deployed
EXITS
0
No exits
SECTOR SHIFT
TECHNOLOGY → OTHER
-3pp · +6pp
§ 01 · TOP HOLDINGS
The book · Q1 2026
FILED AUG 12, 2026
| # | Ticker | Name | Shares | $ value | % port | Δ Q1 |
|---|---|---|---|---|---|---|
| 1 | TSM | TAIWAN SEMICONDUCTOR MANUFAC | 4.94M | $2.4B | 7.1% | −11% |
| 2 | NVDA | NVIDIA CORPORATION | 8.60M | $1.7B | 5.2% | −4% |
| 3 | GOOGL | ALPHABET INC | 3.19M | $1.1B | 3.4% | +27% |
| 4 | AAPL | APPLE INC | 3.26M | $943M | 2.8% | −32% |
| 5 | AVGO | BROADCOM INC | 2.06M | $777M | 2.3% | −7% |
| 6 | MSFT | MICROSOFT CORP | 2.05M | $764M | 2.3% | −29% |
| 7 | META | META PLATFORMS INC | 950K | $535M | 1.6% | −6% |
| 8 | AMZN | AMAZON COM INC | 1.99M | $474M | 1.4% | −37% |
| 9 | MA | MASTERCARD INCORPORATED | 918K | $471M | 1.4% | −13% |
| 10 | AMD | ADVANCED MICRO DEVICES INC | 764K | $444M | 1.3% | −27% |
§ 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 $33.3 billion in assets. The fund runs a broad portfolio of 403 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
3 OF 2 FILINGS MEASURED
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