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
+2.39%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$26.5B
AUM Growth
-$769M
Cap. Flow
-$1.09B
Cap. Flow %
-4.11%
Top 10 Hldgs %
22.54%
Holding
1,941
New
123
Increased
715
Reduced
742
Closed
84

Top Buys

Rank Stock Value
1
KMX icon
CarMax
KMX
+$73M
2
OSH
Oak Street Health, Inc.
OSH
+$60.6M
3
IRTC icon
iRhythm Holdings
IRTC
+$51.2M
4
DXCM icon
DexCom
DXCM
+$39.4M
5
AON icon
Aon
AON
+$30.5M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$449M
2
VUG icon
Vanguard Morningstar Growth ETF
VUG
+$271M
3
AMZN icon
Amazon
AMZN
+$157M
4
MSFT icon
Microsoft
MSFT
+$83.3M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$78.4M

Sector Composition

Rank Sector Weight
1 Technology 25.67%
2 Healthcare 19.26%
3 Financials 11.68%
4 Consumer Discretionary 10.53%
5 Industrials 9.66%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
IFRA icon
1626
iShares US Infrastructure ETF
IFRA
$4.62B
$56K ﹤0.01%
+1,608
New +$51.7K
IMCG icon
1627
iShares Morningstar Mid-Cap Growth ETF
IMCG
$4.16B
$56K ﹤0.01%
882
– –
ACES icon
1628
ALPS Clean Energy ETF
ACES
$124M
$55K ﹤0.01%
700
+500
+250% +$43.3K
FV icon
1629
First Trust Dorsey Wright Focus 5 ETF
FV
$3.8B
$55K ﹤0.01%
1,234
– –
DIM icon
1630
WisdomTree International MidCap Dividend Fund
DIM
$169M
$54K ﹤0.01%
800
– –
OTLK icon
1631
Outlook Therapeutics
OTLK
$206M
$52K ﹤0.01%
+1,150
New +$44K
IAT icon
1632
iShares US Regional Banks ETF
IAT
$687M
$51K ﹤0.01%
900
-150
-14% -$7.94K
STPZ icon
1633
PIMCO 1-5 Year US TIPS Index Exchange-Traded Fund
STPZ
$524M
$51K ﹤0.01%
935
-286
-23% -$15.6K
TQQQ icon
1634
ProShares UltraPro QQQ
TQQQ
$37.4B
$51K ﹤0.01%
2,240
– –
BMVP icon
1635
Invesco Bloomberg MVP Multi-factor ETF
BMVP
$106M
$50K ﹤0.01%
1,290
-1,806
-58% -$69.2K
BRF icon
1636
VanEck Brazil Small-Cap ETF
BRF
$20.4M
$50K ﹤0.01%
2,572
– –
CQQQ icon
1637
Invesco China Technology ETF
CQQQ
$3.24B
$50K ﹤0.01%
613
– –
PID icon
1638
Invesco International Dividend Achievers ETF
PID
$912M
$50K ﹤0.01%
3,000
-800
-21% -$13.1K
SMOG icon
1639
VanEck Low Carbon Energy ETF
SMOG
$136M
$50K ﹤0.01%
318
-115
-27% -$19.7K
SPTL icon
1640
State Street SPDR Portfolio Long Term Treasury ETF
SPTL
$10.7B
$50K ﹤0.01%
1,278
– –
DTH icon
1641
WisdomTree International High Dividend Fund
DTH
$659M
$49K ﹤0.01%
1,258
– –
MJ icon
1642
Amplify Alternative Harvest ETF
MJ
$111M
$49K ﹤0.01%
179
+5
+3% +$1.32K
IGHG icon
1643
ProShares Investment Grade-Interest Rate Hedged
IGHG
$329M
$48K ﹤0.01%
625
+21
+3% +$1.59K
LRGF icon
1644
iShares US Equity Factor ETF
LRGF
$3.71B
$48K ﹤0.01%
1,185
-4,450
-79% -$175K
TOVX icon
1645
Theriva Biologics
TOVX
$11M
$48K ﹤0.01%
283
+65
+30% +$12.8K
LGF.B
1646
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
$48K ﹤0.01%
3,686
-1,300
-26% -$17.1K
FBT icon
1647
First Trust NYSE Arca Biotechnology Index Fund
FBT
$2.81B
$47K ﹤0.01%
293
– –
FREL icon
1648
Fidelity MSCI Real Estate Index ETF
FREL
$1.47B
$47K ﹤0.01%
1,723
-934
-35% -$24.5K
REM icon
1649
iShares Mortgage Real Estate ETF
REM
$543M
$46K ﹤0.01%
+1,300
New +$43.5K
TRVN
1650
DELISTED
Trevena, Inc.
TRVN
$45K ﹤0.01%
40
– –
64 65
66
67 68

Similar funds

Parallax Volatility Advisers
Parallax Volatility Advisers San Francisco, California $38.6B AUM 45.89% 1-Year Est. Return
Credit Agricole
Credit Agricole Montrouge Cedex, France $38.1B AUM
Carson Wealth (CWM LLC)
Carson Wealth (CWM LLC) Omaha, Nebraska $38.1B AUM 19.66% 1-Year Est. Return
Nomura Asset Management
Nomura Asset Management Tokyo, Japan $38.8B AUM 30.94% 1-Year Est. Return
Nomura Holdings
Nomura Holdings Tokyo, Japan $37.7B AUM 34.44% 1-Year Est. Return
Fayez Sarofim & Co
Fayez Sarofim & Co Houston, Texas $39.1B AUM 15.14% 1-Year Est. Return
Grantham, Mayo, Van Otterloo & Co (GMO)
Grantham, Mayo, Van Otterloo & Co (GMO) Boston, Massachusetts $39.1B AUM 28.69% 1-Year Est. Return
HF
HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return

William Blair & Company's Q1 2021 Portfolio in Review

As of Q1 2021, William Blair & Company held 1,941 positions worth $26.5B, down 2.8% from $27.3B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

William Blair & Company withdrew a net $1.09B in Q1 2021, closing 84 positions and reducing 742 holdings. Its most notable exit was HMS Holdings Corp., an estimated $7.64M position sold in full.

By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 28% a quarter earlier, followed by Healthcare and Financials.

Against the trend, William Blair & Company opened a new position in Oak Street Health, Inc. worth $59.1M.

  • William Blair & Company's largest Q1 2021 buy was Oak Street Health, Inc.: 1,089,318 shares worth $59.1M.
  • William Blair & Company added most to CarMax in Q1 2021, an estimated $73M increase.
  • William Blair & Company's biggest Q1 2021 reduction was Apple, cutting an estimated $449M.
  • William Blair & Company fully exited HMS Holdings Corp. in Q1 2021, selling an estimated $7.64M.
  • William Blair & Company's ten largest holdings make up 23% of its $26.5B portfolio in Q1 2021.
  • William Blair & Company opened 123 new positions and closed 84 in Q1 2021.
  • William Blair & Company's portfolio value fell 2.8% quarter-over-quarter to $26.5B.

Based on William Blair & Company's 13F filing for Q1 2021, filed 13 May 2021.