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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
STZ.B
1726
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
$26K ﹤0.01%
122
ARDX icon
1727
Ardelyx
ARDX
$1.03B
$25K ﹤0.01%
19,000
-6,000
-24% -$16K
GBX icon
1728
The Greenbrier Companies
GBX
$1.41B
$25K ﹤0.01%
586
PCRX icon
1729
Pacira BioSciences
PCRX
$945M
$25K ﹤0.01%
450
AMPE
1730
DELISTED
Ampio Pharmaceuticals Inc.
AMPE
$25K ﹤0.01%
50
QCLN icon
1731
First Trust NASDAQ Clean Edge Green Energy Index Fund
QCLN
$632M
$24K ﹤0.01%
376
+276
+276% +$18.1K
GLDG
1732
GoldMining Inc
GLDG
$223M
$23K ﹤0.01%
20,000
OPTT icon
1733
Ocean Power Technologies
OPTT
$54.1M
$23K ﹤0.01%
+10,000
New +$20.9K
ERUS
1734
DELISTED
iShares MSCI Russia ETF
ERUS
$23K ﹤0.01%
487
EWN icon
1735
iShares MSCI Netherlands ETF
EWN
$727M
$22K ﹤0.01%
450
FHLC icon
1736
Fidelity MSCI Health Care Index ETF
FHLC
$3.42B
$22K ﹤0.01%
349
+24
+7% +$1.59K
HYD icon
1737
VanEck High Yield Muni ETF
HYD
$4.4B
$22K ﹤0.01%
+350
New +$22.2K
INTF icon
1738
iShares International Equity Factor ETF
INTF
$3.75B
$22K ﹤0.01%
765
ZG icon
1739
Zillow
ZG
$7.53B
$22K ﹤0.01%
253
+100
+65% +$10.2K
CZA icon
1740
Invesco Zacks Mid-Cap ETF
CZA
$192M
$21K ﹤0.01%
230
FVAL icon
1741
Fidelity Value Factor ETF
FVAL
$1.37B
$21K ﹤0.01%
450
GII icon
1742
State Street SPDR S&P Global Infrastructure ETF
GII
$932M
$21K ﹤0.01%
390
OXY.WS icon
1743
Occidental Petroleum Corp Warrants
OXY.WS
$34.4B
$21K ﹤0.01%
1,754
-69
-4% -$742
SOS
1744
SOS Limited
SOS
$16.1M
$21K ﹤0.01%
+13
New +$26.1K
VNM icon
1745
VanEck Vietnam ETF
VNM
$514M
$21K ﹤0.01%
1,083
USEQ
1746
DELISTED
Invesco Russell 1000 Enhanced Equal Weight ETF
USEQ
$21K ﹤0.01%
580
HYLS icon
1747
First Trust Exchange-Traded Fund IV First Trust Tactical High Yield ETF
HYLS
$1.64B
$20K ﹤0.01%
412
IGM icon
1748
iShares Expanded Tech Sector ETF
IGM
$10.8B
$20K ﹤0.01%
300
DIG icon
1749
ProShares Ultra Energy
DIG
$83.3M
$19K ﹤0.01%
1,144
NFRA icon
1750
FlexShares STOXX Global Broad Infrastructure Index Fund
NFRA
$3.03B
$19K ﹤0.01%
349
-669
-66% -$38.8K

Similar funds

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.