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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
PSK icon
1751
State Street SPDR ICE Preferred Securities ETF
PSK
$683M
$19K ﹤0.01%
430
-850
-66% -$37.1K
XTL icon
1752
State Street SPDR S&P Telecom ETF
XTL
$558M
$17K ﹤0.01%
179
– –
BUZZ icon
1753
VanEck Social Sentiment ETF
BUZZ
$101M
$16K ﹤0.01%
637
– –
EWD icon
1754
iShares MSCI Sweden ETF
EWD
$582M
$16K ﹤0.01%
350
– –
EWS icon
1755
iShares MSCI Singapore ETF
EWS
$1.16B
$15K ﹤0.01%
680
-202
-23% -$4.69K
SDVY icon
1756
First Trust SMID Cap Rising Dividend Achievers ETF
SDVY
$11.8B
$15K ﹤0.01%
+515
New +$14.9K
CUT icon
1757
Invesco MSCI Global Timber ETF
CUT
$33.4M
$14K ﹤0.01%
400
– –
EZA icon
1758
iShares MSCI South Africa ETF
EZA
$567M
$14K ﹤0.01%
296
– –
IPAC icon
1759
iShares Core MSCI Pacific ETF
IPAC
$2.78B
$14K ﹤0.01%
210
– –
NGD
1760
DELISTED
New Gold Inc
NGD
$14K ﹤0.01%
13,000
– –
RSPT icon
1761
Invesco S&P 500 Equal Weight Technology ETF
RSPT
$5.95B
$14K ﹤0.01%
500
– –
RZG icon
1762
Invesco S&P SmallCap 600 Pure Growth ETF
RZG
$138M
$14K ﹤0.01%
255
– –
TLH icon
1763
iShares 10-20 Year Treasury Bond ETF
TLH
$10.8B
$14K ﹤0.01%
93
– –
MDIV icon
1764
First Trust Exchange-Traded Fund VI Multi-Asset Diversified Income Index Fund
MDIV
$430M
$13K ﹤0.01%
813
– –
AAXJ icon
1765
iShares MSCI All Country Asia ex Japan ETF
AAXJ
$3.83B
$12K ﹤0.01%
143
– –
IDLV icon
1766
Invesco S&P International Developed Low Volatility ETF
IDLV
$344M
$12K ﹤0.01%
378
– –
ISCV icon
1767
iShares Morningstar Small-Cap Value ETF
ISCV
$706M
$12K ﹤0.01%
206
-55
-21% -$3.14K
LQDH icon
1768
iShares Interest Rate Hedged Corporate Bond ETF
LQDH
$540M
$12K ﹤0.01%
130
– –
MXI icon
1769
iShares Global Materials ETF
MXI
$361M
$12K ﹤0.01%
138
– –
XAR icon
1770
State Street SPDR S&P Aerospace & Defense ETF
XAR
$6.64B
$12K ﹤0.01%
104
+8
+8% +$989
CYB
1771
DELISTED
WisdomTree Chinese Yuan Strategy Fund
CYB
$11K ﹤0.01%
400
– –
AAWW
1772
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
$11K ﹤0.01%
136
– –
SLY
1773
DELISTED
SPDR S&P 600 Small Cap ETF (based on S&P SmallCap 600 Index--symbol SML)
SLY
$11K ﹤0.01%
120
– –
FNCL icon
1774
Fidelity MSCI Financials Index ETF
FNCL
$2.42B
$10K ﹤0.01%
194
+24
+14% +$1.28K
FNDX icon
1775
Schwab Fundamental US Large Company Index ETF
FNDX
$27.4B
$10K ﹤0.01%
582
-2,019
-78% -$37.1K
69 70
71
72 73

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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.