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William Blair & Company

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
Cap. Flow
-$792M
Cap. Flow %
-2.06%
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
ANET icon
Arista Networks
ANET
+$71.2M
3
RSP icon
Invesco S&P 500 Equal Weight ETF
RSP
+$61.8M
4
VTI icon
Vanguard Morningstar Total Stock Market ETF
VTI
+$55.8M
5
MIAX
Miami International Holdings
MIAX
+$49.4M

Top Sells

Rank Stock Value
1
XOM icon
ExxonMobil
XOM
+$161M
2
CPRT icon
Copart
CPRT
+$62M
3
DHR icon
Danaher
DHR
+$59.1M
4
AAPL icon
Apple
AAPL
+$57M
5
VEEV icon
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%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CELH icon
1401
Celsius Holdings
CELH
$7.03B
$314K ﹤0.01%
10,726
-98,805
-90% -$3.11M
SPXL icon
1402
Direxion Daily S&P 500 Bull 3x ETF
SPXL
$6.77B
$314K ﹤0.01%
+1,159
New +$293K
HST icon
1403
Host Hotels & Resorts
HST
$15.2B
$313K ﹤0.01%
+13,197
New +$295K
INGR icon
1404
Ingredion
INGR
$6.23B
$311K ﹤0.01%
+3,280
New +$347K
MTN icon
1405
Vail Resorts
MTN
$4.94B
$309K ﹤0.01%
+2,271
New +$296K
FIVE icon
1406
Five Below
FIVE
$13.1B
$309K ﹤0.01%
1,720
-15,692
-90% -$3.38M
ICVT icon
1407
iShares Convertible Bond ETF
ICVT
$7.68B
$309K ﹤0.01%
2,535
-227
-8% -$26.3K
BKH icon
1408
Black Hills Corp
BKH
$5.32B
$307K ﹤0.01%
+4,133
New +$304K
GFI icon
1409
Gold Fields
GFI
$38.2B
$306K ﹤0.01%
9,110
+89
+1% +$3.71K
CM icon
1410
Canadian Imperial Bank of Commerce
CM
$102B
$306K ﹤0.01%
2,658
+235
+10% +$25.8K
TTD icon
1411
Trade Desk
TTD
$7.04B
$305K ﹤0.01%
16,848
-3,172
-16% -$67.4K
FDL icon
1412
First Trust Morningstar Dividend Leaders Index Fund
FDL
$8.01B
$304K ﹤0.01%
6,244
+3
+0% +$150
KWEB icon
1413
KraneShares CSI China Internet ETF
KWEB
$4.7B
$304K ﹤0.01%
12,409
-2,187
-15% -$60.5K
GPK icon
1414
Graphic Packaging
GPK
$2.86B
$303K ﹤0.01%
+28,623
New +$292K
SW
1415
Smurfit Westrock
SW
$22.8B
$302K ﹤0.01%
6,519
+455
+8% +$18.8K
SCHC icon
1416
Schwab International Small-Cap Equity ETF
SCHC
$5.6B
$301K ﹤0.01%
6,258
+18
+0.3% +$893
TM icon
1417
Toyota
TM
$231B
$301K ﹤0.01%
1,788
+336
+23% +$63.6K
HXL icon
1418
Hexcel
HXL
$6.85B
$301K ﹤0.01%
3,008
-2,417
-45% -$219K
BWA icon
1419
BorgWarner
BWA
$12.8B
$300K ﹤0.01%
+4,521
New +$286K
PRAA icon
1420
PRA Group
PRAA
$716M
$299K ﹤0.01%
15,738
-146,071
-90% -$2.59M
MOH icon
1421
Molina Healthcare
MOH
$10.9B
$297K ﹤0.01%
+1,300
New +$236K
SITM icon
1422
SiTime
SITM
$16.5B
$297K ﹤0.01%
+398
New +$251K
UMC icon
1423
United Microelectronic
UMC
$54.4B
$297K ﹤0.01%
10,899
-2,199
-17% -$37.6K
SOUN icon
1424
SoundHound AI
SOUN
$2.78B
$296K ﹤0.01%
45,816
+18,320
+67% +$142K
SNSR icon
1425
Global X Internet of Things ETF
SNSR
$205M
$296K ﹤0.01%
5,930
– –
55 56
57
58 59

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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.