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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
IAT icon
1651
iShares US Regional Banks ETF
IAT
$687M
$55K ﹤0.01%
900
– –
IYY icon
1652
iShares Dow Jones US ETF
IYY
$3.07B
$55K ﹤0.01%
510
– –
DIM icon
1653
WisdomTree International MidCap Dividend Fund
DIM
$169M
$54K ﹤0.01%
800
– –
PID icon
1654
Invesco International Dividend Achievers ETF
PID
$912M
$53K ﹤0.01%
3,000
– –
LRGF icon
1655
iShares US Equity Factor ETF
LRGF
$3.71B
$50K ﹤0.01%
1,185
– –
OTLK icon
1656
Outlook Therapeutics
OTLK
$206M
$50K ﹤0.01%
1,150
– –
SJNK icon
1657
State Street SPDR Bloomberg Short Term High Yield Bond ETF
SJNK
$4.8B
$50K ﹤0.01%
1,813
-718
-28% -$19.7K
FM
1658
DELISTED
iShares Frontier and Select EM ETF
FM
$50K ﹤0.01%
1,487
+66
+5% +$2.21K
BRF icon
1659
VanEck Brazil Small-Cap ETF
BRF
$20.4M
$49K ﹤0.01%
2,572
– –
DTH icon
1660
WisdomTree International High Dividend Fund
DTH
$659M
$48K ﹤0.01%
1,258
– –
DVYE icon
1661
iShares Emerging Markets Dividend ETF
DVYE
$1.21B
$48K ﹤0.01%
1,235
+21
+2% +$813
IGHG icon
1662
ProShares Investment Grade-Interest Rate Hedged
IGHG
$329M
$47K ﹤0.01%
625
– –
REM icon
1663
iShares Mortgage Real Estate ETF
REM
$543M
$47K ﹤0.01%
1,300
– –
RSPM icon
1664
Invesco S&P 500 Equal Weight Materials ETF
RSPM
$184M
$47K ﹤0.01%
1,465
+5
+0.3% +$166
SMOG icon
1665
VanEck Low Carbon Energy ETF
SMOG
$136M
$47K ﹤0.01%
318
– –
COHR icon
1666
Coherent
COHR
$69.6B
$46K ﹤0.01%
768
+50
+7% +$3.26K
LSXMA
1667
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
$46K ﹤0.01%
1,334
-271
-17% -$9.47K
IFGL icon
1668
iShares International Developed Real Estate ETF
IFGL
$82.2M
$45K ﹤0.01%
1,600
– –
SAN icon
1669
Banco Santander
SAN
$211B
$45K ﹤0.01%
12,360
-6,935
-36% -$25.6K
IVOV icon
1670
Vanguard S&P Mid-Cap 400 Value ETF
IVOV
$1.37B
$43K ﹤0.01%
542
-200
-27% -$16.1K
GALT icon
1671
Galectin Therapeutics
GALT
$317M
$42K ﹤0.01%
10,756
– –
LBRDA icon
1672
Liberty Broadband Class A
LBRDA
$5.07B
$42K ﹤0.01%
250
-307
-55% -$53.6K
PAYS icon
1673
Paysign
PAYS
$723M
$41K ﹤0.01%
15,120
– –
USHY icon
1674
iShares Broad USD High Yield Corporate Bond ETF
USHY
$29.1B
$41K ﹤0.01%
986
-414
-30% -$17.2K
EZM icon
1675
WisdomTree US MidCap Fund
EZM
$957M
$40K ﹤0.01%
765
– –
65 66
67
68 69

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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.