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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
+1.99%
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
$29.4B
AUM Growth
+$519M
Cap. Flow
+$281M
Cap. Flow %
0.96%
Top 10 Hldgs %
23.58%
Holding
1,987
New
99
Increased
752
Reduced
666
Closed
108

Top Buys

Rank Stock Value
1
ABNB icon
Airbnb
ABNB
+$45.2M
2
CHWY icon
Chewy
CHWY
+$31.5M
3
U icon
Unity
U
+$23.3M
4
RYAN icon
Ryan Specialty Holdings
RYAN
+$22.4M
5
AMZN icon
Amazon
AMZN
+$21.5M

Top Sells

Rank Stock Value
1
IDXX icon
Idexx Laboratories
IDXX
+$37.7M
2
GD icon
General Dynamics
GD
+$33.5M
3
ECL icon
Ecolab
ECL
+$31.7M
4
JNJ icon
Johnson & Johnson
JNJ
+$20.9M
5
UBER icon
Uber
UBER
+$19.2M

Sector Composition

Rank Sector Weight
1 Technology 26.19%
2 Healthcare 19.81%
3 Financials 11.61%
4 Consumer Discretionary 10.68%
5 Industrials 9.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
FXN icon
1801
First Trust Energy AlphaDEX Fund
FXN
$388M
$5K ﹤0.01%
419
– –
IDEV icon
1802
iShares Core MSCI International Developed Markets ETF
IDEV
$32.7B
$5K ﹤0.01%
70
– –
RSPS icon
1803
Invesco S&P 500 Equal Weight Consumer Staples ETF
RSPS
$246M
$5K ﹤0.01%
175
– –
SIL icon
1804
Global X Silver Miners ETF NEW
SIL
$4.89B
$5K ﹤0.01%
150
-45
-23% -$1.79K
IDLB
1805
DELISTED
Invesco FTSE International Low Beta Equal Weight ETF
IDLB
$5K ﹤0.01%
180
– –
EIS icon
1806
iShares MSCI Israel ETF
EIS
$899M
$4K ﹤0.01%
50
– –
FWONA icon
1807
Liberty Media Series A
FWONA
$23.7B
$4K ﹤0.01%
85
-2
-2% -$84
KCE icon
1808
State Street SPDR S&P Capital Markets ETF
KCE
$473M
$4K ﹤0.01%
42
– –
LEGR icon
1809
First Trust Indxx Innovative Transaction & Process ETF
LEGR
$133M
$4K ﹤0.01%
100
– –
MILN
1810
Global X Millennial Consumer ETF
MILN
$102M
$4K ﹤0.01%
+90
New +$3.96K
MLPX icon
1811
Global X MLP & Energy Infrastructure ETF
MLPX
$3.57B
$4K ﹤0.01%
104
– –
PFM icon
1812
Invesco Dividend Achievers ETF
PFM
$811M
$4K ﹤0.01%
111
– –
PGJ icon
1813
Invesco Golden Dragon China ETF
PGJ
$95.1M
$4K ﹤0.01%
100
-100
-50% -$4.76K
SPYV icon
1814
State Street SPDR Portfolio S&P 500 Value ETF
SPYV
$36.6B
$4K ﹤0.01%
111
-73
-40% -$2.92K
XPH icon
1815
State Street SPDR S&P Pharmaceuticals ETF
XPH
$510M
$4K ﹤0.01%
90
+30
+50% +$1.49K
ITB icon
1816
iShares US Home Construction ETF
ITB
$2.34B
$3K ﹤0.01%
52
-250
-83% -$17.6K
FDIQ
1817
Invesco Bloomberg Financial Data Providers ETF
FDIQ
$48.1M
$3K ﹤0.01%
41
– –
SCHH icon
1818
Schwab US REIT ETF
SCHH
$11.3B
$3K ﹤0.01%
132
-166
-56% -$3.96K
SLQD icon
1819
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.38B
$3K ﹤0.01%
65
– –
SPXU icon
1820
ProShares UltraPro Short S&P 500
SPXU
$385M
$3K ﹤0.01%
8
– –
UCO icon
1821
ProShares Ultra Bloomberg Crude Oil
UCO
$433M
$3K ﹤0.01%
+156
New +$2.91K
VCLT icon
1822
Vanguard Long-Term Corporate Bond ETF
VCLT
$8.75B
$3K ﹤0.01%
+32
New +$3.46K
XOP icon
1823
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$3.68B
$3K ﹤0.01%
33
-900
-96% -$76.6K
XRLV
1824
DELISTED
Invesco S&P 500 ex-Rate Sensitive Low Volatility ETF
XRLV
$3K ﹤0.01%
55
– –
EINC icon
1825
VanEck Energy Income ETF
EINC
$79.5M
$2K ﹤0.01%
38
– –
71 72
73
74 75

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William Blair & Company's Q3 2021 Portfolio in Review

As of Q3 2021, William Blair & Company held 1,987 positions worth $29.4B, up 1.8% from $28.9B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q3 2021 filing shows 99 new, 752 increased, 666 reduced and 108 closed positions. Its largest new stake was Ryan Specialty Holdings: 709,555 shares worth $24M. The largest sale was Idexx Laboratories, an estimated $37.7M.

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

  • William Blair & Company's largest Q3 2021 buy was Ryan Specialty Holdings: 709,555 shares worth $24M.
  • William Blair & Company added most to Airbnb in Q3 2021, an estimated $45.2M increase.
  • William Blair & Company's biggest Q3 2021 reduction was Idexx Laboratories, cutting an estimated $37.7M.
  • William Blair & Company fully exited Slack Technologies, Inc. in Q3 2021, selling an estimated $13.8M.
  • William Blair & Company's ten largest holdings make up 24% of its $29.4B portfolio in Q3 2021.
  • William Blair & Company opened 99 new positions and closed 108 in Q3 2021.
  • William Blair & Company's portfolio value rose 1.8% quarter-over-quarter to $29.4B.

Based on William Blair & Company's 13F filing for Q3 2021, filed 12 Nov 2021.