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William Blair & Company Portfolio holdings
AUM
$38.4B
1-Year Est. Return
25.71%
This Fund
S&P 500
This Quarter
Est. Return
+19.08%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+606.62%
AUM
$38.4B
AUM Growth
+$3.49B
(+10%)
Cap. Flow
-$792M
Cap. Flow
% of AUM
-2.06%
Top 10 Holdings %
Top 10 Hldgs %
26.32%
Holding
2,083
New
163
Increased
891
Reduced
708
Closed
85
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
HONA
Honeywell Aerospace
HONA
|
+$100M |
| 2 |
Arista Networks
ANET
|
+$71.2M |
| 3 |
Invesco S&P 500 Equal Weight ETF
RSP
|
+$61.8M |
| 4 |
Vanguard Morningstar Total Stock Market ETF
VTI
|
+$55.8M |
| 5 |
MIAX
Miami International Holdings
MIAX
|
+$49.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
ExxonMobil
XOM
|
+$161M |
| 2 |
Copart
CPRT
|
+$62M |
| 3 |
Danaher
DHR
|
+$59.1M |
| 4 |
Apple
AAPL
|
+$57M |
| 5 |
Veeva Systems
VEEV
|
+$52.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 24.38% |
| 2 | Miscellaneous | 18.67% |
| 3 | Industrials | 15.24% |
| 4 | Financials | 11.07% |
| 5 | Healthcare | 9.11% |
Similar funds
TWC
PIF
William Blair & Company's Q2 2026 Portfolio in Review
As of Q2 2026, William Blair & Company held 2,083 positions worth $38.4B, up 10% from $34.9B the previous quarter. Its ten largest holdings account for 26% of the portfolio.
William Blair & Company's Q2 2026 filing shows 163 new, 891 increased, 708 reduced and 85 closed positions. Its largest new stake was Honeywell Aerospace: 454,071 shares worth $100M. The largest sale was ExxonMobil, an estimated $161M.
By sector, the portfolio is most concentrated in Technology at 24% of assets, up from 22% a quarter earlier, followed by Miscellaneous and Industrials.
- William Blair & Company's largest Q2 2026 buy was Honeywell Aerospace: 454,071 shares worth $100M.
- William Blair & Company added most to Arista Networks in Q2 2026, an estimated $71.2M increase.
- William Blair & Company's biggest Q2 2026 reduction was Copart, cutting an estimated $62M.
- William Blair & Company fully exited ExxonMobil in Q2 2026, selling an estimated $161M.
- William Blair & Company's ten largest holdings make up 26% of its $38.4B portfolio in Q2 2026.
- William Blair & Company opened 163 new positions and closed 85 in Q2 2026.
- William Blair & Company's portfolio value rose 10% quarter-over-quarter to $38.4B.
Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.