We are live on ! Find out more
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
LRGF icon
1801
iShares US Equity Factor ETF
LRGF
$3.69B
$34.3K ﹤0.01%
453
-180
-28% -$13.2K
WTI icon
1802
W&T Offshore
WTI
$604M
$34K ﹤0.01%
+10,804
New +$40.1K
RSPE icon
1803
Invesco ESG S&P 500 Equal Weight ETF
RSPE
$73.9M
$33.6K ﹤0.01%
990
-1,646
-62% -$52.9K
PIZ icon
1804
Invesco Dorsey Wright Developed Markets Momentum ETF
PIZ
$667M
$33.5K ﹤0.01%
600
– –
DH icon
1805
Definitive Healthcare
DH
$109M
$33.4K ﹤0.01%
+40,220
New +$36.8K
JXI icon
1806
iShares Global Utilities ETF
JXI
$294M
$33K ﹤0.01%
389
+4
+1% +$343
DFJ icon
1807
WisdomTree Japan SmallCap Dividend Fund
DFJ
$451M
$33K ﹤0.01%
313
– –
NEE.PRT
1808
NextEra Energy 7.234% Corporate Units
NEE.PRT
$1.42B
$31.5K ﹤0.01%
633
+110
+21% +$5.63K
HTZ icon
1809
Hertz
HTZ
$702M
$31.2K ﹤0.01%
13,772
+452
+3% +$2.47K
IHE icon
1810
iShares US Pharmaceuticals ETF
IHE
$1.63B
$29.7K ﹤0.01%
+300
New +$27K
ALB.PRA icon
1811
Albemarle Corp Depositary Shares
ALB.PRA
$2.22B
$29.6K ﹤0.01%
535
– –
CGEN icon
1812
Compugen
CGEN
$235M
$29.1K ﹤0.01%
+13,600
New +$34.1K
XOP icon
1813
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$4.06B
$29K ﹤0.01%
188
– –
VFQY icon
1814
Vanguard US Quality Factor ETF
VFQY
$498M
$28.9K ﹤0.01%
170
– –
SDS icon
1815
ProShares UltraShort S&P500
SDS
$406M
$28.4K ﹤0.01%
500
– –
AWRE icon
1816
Aware
AWRE
$27M
$28.3K ﹤0.01%
20,964
– –
AGGM
1817
iShares 1-10 Year U.S. Aggregate Bond ETF
AGGM
$106M
$28K ﹤0.01%
270
-53
-16% -$5.5K
SOXQ icon
1818
Invesco PHLX Semiconductor ETF
SOXQ
$2.83B
$28K ﹤0.01%
+250
New +$22.6K
OUSA icon
1819
ALPS O'Shares U.S. Quality Dividend ETF
OUSA
$738M
$27.8K ﹤0.01%
476
+2
+0.4% +$116
STXG icon
1820
Strive 1000 Growth ETF
STXG
$150M
$27.6K ﹤0.01%
500
– –
SRVR icon
1821
Pacer Data & Infrastructure Real Estate ETF
SRVR
$331M
$27.2K ﹤0.01%
856
+819
+2,214% +$27.9K
CMPX icon
1822
Compass Therapeutics
CMPX
$353M
$26.7K ﹤0.01%
12,186
-18,574
-60% -$54.8K
PJP icon
1823
Invesco Pharmaceuticals ETF
PJP
$547M
$26.6K ﹤0.01%
224
+164
+273% +$17.7K
BMAY icon
1824
Innovator US Equity Buffer ETF May
BMAY
$237M
$26.2K ﹤0.01%
553
– –
HYS icon
1825
PIMCO 0-5 Year High Yield Corporate Bond Index Exchange-Traded Fund
HYS
$1.79B
$26K ﹤0.01%
278
– –
71 72
73
74 75

Similar funds

Bank Julius Baer & Co
Bank Julius Baer & Co Zurich, Switzerland $38.6B AUM 35.31% 1-Year Est. Return
Public Sector Pension Investment Board (PSP Investments)
Public Sector Pension Investment Board (PSP Investments) Montreal, Quebec, Canada $38.7B AUM 44.46% 1-Year Est. Return
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $38.8B AUM 41.35% 1-Year Est. Return
TWC
TD Waterhouse Canada Toronto, Ontario, Canada $38B AUM 39.14% 1-Year Est. Return
Treasurer of the State of North Carolina
Treasurer of the State of North Carolina Raleigh, North Carolina $38.8B AUM 40.77% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
PIF
Public Investment Fund Al Aqiq District, Riyadh, Saudi Arabia $37.9B AUM 7.98% 1-Year Est. Return
Asset Management One
Asset Management One Tokyo, Japan $39B AUM 37.51% 1-Year Est. Return

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.