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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
ETHO icon
1476
Amplify Etho Climate Leadership US ETF
ETHO
$191M
$260K ﹤0.01%
3,229
+35
+1% +$2.6K
LASR icon
1477
nLIGHT
LASR
$2.33B
$260K ﹤0.01%
3,737
-3,303
-47% -$230K
PNR icon
1478
Pentair
PNR
$8.97B
$259K ﹤0.01%
3,379
+1,058
+46% +$83.7K
QLYS icon
1479
Qualys
QLYS
$5.2B
$258K ﹤0.01%
+1,879
New +$185K
ENSG icon
1480
The Ensign Group
ENSG
$10.1B
$258K ﹤0.01%
1,611
+45
+3% +$7.94K
HLNE icon
1481
Hamilton Lane
HLNE
$5.3B
$256K ﹤0.01%
3,253
-2,495
-43% -$222K
LRN icon
1482
Stride
LRN
$3.44B
$256K ﹤0.01%
2,969
+37
+1% +$3.4K
LAD icon
1483
Lithia Motors
LAD
$7.92B
$256K ﹤0.01%
+880
New +$250K
SUN icon
1484
Sunoco
SUN
$14.6B
$255K ﹤0.01%
3,775
+11
+0.3% +$731
INDB icon
1485
Independent Bank
INDB
$3.92B
$254K ﹤0.01%
3,030
+189
+7% +$15K
IXJ icon
1486
iShares Global Healthcare ETF
IXJ
$4.2B
$253K ﹤0.01%
2,573
+20
+0.8% +$1.88K
SLS icon
1487
SELLAS Life Sciences
SLS
$2.37B
$252K ﹤0.01%
17,106
+3,101
+22% +$21.4K
ACI icon
1488
Albertsons Companies
ACI
$6.17B
$251K ﹤0.01%
18,532
+1,659
+10% +$26.6K
TAP icon
1489
Molson Coors Class B
TAP
$7.26B
$249K ﹤0.01%
+6,392
New +$267K
VIOG icon
1490
Vanguard S&P Small-Cap 600 Growth ETF
VIOG
$1.05B
$248K ﹤0.01%
1,615
+550
+52% +$76.6K
ONDS icon
1491
Ondas Inc
ONDS
$4.13B
$248K ﹤0.01%
30,037
+13,206
+78% +$130K
TAN icon
1492
Invesco Solar ETF
TAN
$984M
$246K ﹤0.01%
4,164
+2,050
+97% +$125K
SLAB icon
1493
Silicon Laboratories
SLAB
$7.35B
$245K ﹤0.01%
1,121
-3
-0.3% -$649
FXI icon
1494
iShares China Large-Cap ETF
FXI
$4.15B
$243K ﹤0.01%
7,700
+1,060
+16% +$37.8K
VOYA icon
1495
Voya Financial
VOYA
$9.37B
$243K ﹤0.01%
+2,684
New +$219K
DNOW icon
1496
DNOW Inc
DNOW
$2.83B
$243K ﹤0.01%
18,700
+182
+1% +$2.36K
NCNO icon
1497
nCino
NCNO
$2.35B
$241K ﹤0.01%
+14,733
New +$242K
RARE icon
1498
Ultragenyx Pharmaceutical
RARE
$1.34B
$241K ﹤0.01%
+7,212
New +$179K
JOBY icon
1499
Joby Aviation
JOBY
$6.26B
$241K ﹤0.01%
26,992
+141
+0.5% +$1.36K
DOX icon
1500
Amdocs
DOX
$6.41B
$241K ﹤0.01%
4,763
+1,348
+39% +$82.7K
58 59
60
61 62

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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.