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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
FXL icon
1601
First Trust Technology AlphaDEX Fund
FXL
$2.84B
$88K ﹤0.01%
715
-36
-5% -$4.52K
VT icon
1602
Vanguard Total World Stock ETF
VT
$81.4B
$88K ﹤0.01%
866
-132
-13% -$13.8K
BIL icon
1603
State Street SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$46.7B
$87K ﹤0.01%
949
-25
-3% -$2.29K
BKLN icon
1604
Invesco Senior Loan ETF
BKLN
$6.75B
$87K ﹤0.01%
3,928
+8
+0.2% +$177
IGF icon
1605
iShares Global Infrastructure ETF
IGF
$10.7B
$87K ﹤0.01%
1,897
– –
WBD icon
1606
Warner Bros
WBD
$69.3B
$87K ﹤0.01%
3,436
-362
-10% -$10.2K
IOO icon
1607
iShares Global 100 ETF
IOO
$9.43B
$85K ﹤0.01%
1,201
– –
MDYG icon
1608
State Street SPDR S&P 400 Mid Cap Growth ETF
MDYG
$2.96B
$85K ﹤0.01%
1,118
– –
CQQQ icon
1609
Invesco China Technology ETF
CQQQ
$3.24B
$84K ﹤0.01%
1,278
+640
+100% +$45.8K
CWI icon
1610
State Street SPDR MSCI ACWI ex-US ETF
CWI
$2.87B
$84K ﹤0.01%
2,883
– –
MGI
1611
DELISTED
MoneyGram International, Inc. New
MGI
$84K ﹤0.01%
+10,462
New +$99.7K
SPAB icon
1612
State Street SPDR Portfolio Aggregate Bond ETF
SPAB
$9.93B
$81K ﹤0.01%
2,722
– –
EWZ icon
1613
iShares MSCI Brazil ETF
EWZ
$8.57B
$79K ﹤0.01%
2,462
– –
EMAN
1614
DELISTED
eMagin Corporation
EMAN
$79K ﹤0.01%
35,100
– –
CRIS icon
1615
Curis
CRIS
$3.49M
$78K ﹤0.01%
25
– –
DON icon
1616
WisdomTree US MidCap Dividend Fund
DON
$4.1B
$78K ﹤0.01%
1,877
– –
EES icon
1617
WisdomTree US SmallCap Earnings Fund
EES
$730M
$78K ﹤0.01%
1,611
– –
PVLA
1618
Palvella Therapeutics
PVLA
$2.23B
$78K ﹤0.01%
188
– –
PGF icon
1619
Invesco Financial Preferred ETF
PGF
$668M
$74K ﹤0.01%
3,887
+497
+15% +$9.49K
ATHX
1620
DELISTED
Athersys, Inc. Common Stock
ATHX
$73K ﹤0.01%
2,192
-800
-27% -$30.4K
EWX icon
1621
State Street SPDR S&P Emerging Markets Small Cap ETF
EWX
$702M
$72K ﹤0.01%
1,220
– –
PXH icon
1622
Invesco FTSE RAFI Emerging Markets ETF
PXH
$1.97B
$72K ﹤0.01%
3,234
-924
-22% -$21K
IFRA icon
1623
iShares US Infrastructure ETF
IFRA
$4.62B
$70K ﹤0.01%
2,041
+13
+0.6% +$463
DBEU icon
1624
Xtrackers MSCI Europe Hedged Equity ETF
DBEU
$798M
$68K ﹤0.01%
2,000
– –
PFXF icon
1625
VanEck Preferred Securities ex Financials ETF
PFXF
$2.47B
$68K ﹤0.01%
3,200
-1,365
-30% -$29.3K
63 64
65
66 67

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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.