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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
+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
DJP icon
1776
iPath Bloomberg Commodity Index Total Return ETN due 12 June 2036
DJP
$825M
$7K ﹤0.01%
+293
New +$6.9K
FNCL icon
1777
Fidelity MSCI Financials Index ETF
FNCL
$2.42B
$7K ﹤0.01%
150
– –
IPAC icon
1778
iShares Core MSCI Pacific ETF
IPAC
$2.78B
$7K ﹤0.01%
110
-127
-54% -$8.47K
PWV icon
1779
Invesco Large Cap Value ETF
PWV
$1.78B
$7K ﹤0.01%
156
– –
QCLN icon
1780
First Trust NASDAQ Clean Edge Green Energy Index Fund
QCLN
$632M
$7K ﹤0.01%
100
– –
QDF icon
1781
FlexShares Quality Dividend Index Fund
QDF
$2.28B
$7K ﹤0.01%
124
– –
AIA icon
1782
iShares Asia 50 ETF
AIA
$5.04B
$6K ﹤0.01%
66
– –
RSPS icon
1783
Invesco S&P 500 Equal Weight Consumer Staples ETF
RSPS
$246M
$6K ﹤0.01%
175
– –
XHS icon
1784
State Street SPDR S&P Health Care Services ETF
XHS
$207M
$6K ﹤0.01%
60
– –
XOP icon
1785
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$3.68B
$6K ﹤0.01%
76
-50
-40% -$3.82K
FCG icon
1786
First Trust Natural Gas ETF
FCG
$645M
$5K ﹤0.01%
400
-8,173
-95% -$96.4K
IDEV icon
1787
iShares Core MSCI International Developed Markets ETF
IDEV
$32.7B
$5K ﹤0.01%
70
– –
SPEU icon
1788
State Street SPDR Portfolio Europe ETF
SPEU
$742M
$5K ﹤0.01%
135
– –
IDLB
1789
DELISTED
Invesco FTSE International Low Beta Equal Weight ETF
IDLB
$5K ﹤0.01%
180
– –
FXN icon
1790
First Trust Energy AlphaDEX Fund
FXN
$388M
$4K ﹤0.01%
419
– –
KCE icon
1791
State Street SPDR S&P Capital Markets ETF
KCE
$473M
$4K ﹤0.01%
42
– –
LEGR icon
1792
First Trust Indxx Innovative Transaction & Process ETF
LEGR
$133M
$4K ﹤0.01%
100
– –
PFM icon
1793
Invesco Dividend Achievers ETF
PFM
$811M
$4K ﹤0.01%
111
– –
SPXU icon
1794
ProShares UltraPro Short S&P 500
SPXU
$385M
$4K ﹤0.01%
8
– –
AIEQ icon
1795
Amplify AI Powered Equity ETF
AIEQ
$124M
$3K ﹤0.01%
80
+70
+700% +$2.73K
EIS icon
1796
iShares MSCI Israel ETF
EIS
$899M
$3K ﹤0.01%
50
– –
FDIQ
1797
Invesco Bloomberg Financial Data Providers ETF
FDIQ
$48.1M
$3K ﹤0.01%
41
– –
MLPX icon
1798
Global X MLP & Energy Infrastructure ETF
MLPX
$3.57B
$3K ﹤0.01%
104
– –
RWR icon
1799
State Street SPDR Dow Jones REIT ETF
RWR
$1.87B
$3K ﹤0.01%
33
-1,678
-98% -$152K
SCHH icon
1800
Schwab US REIT ETF
SCHH
$11.3B
$3K ﹤0.01%
168
-332
-66% -$6.49K
70 71
72
73 74

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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.