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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
AOM icon
1701
iShares Core Moderate Allocation ETF
AOM
$1.77B
$31K ﹤0.01%
700
– –
EEMS icon
1702
iShares MSCI Emerging Markets Small-Cap ETF
EEMS
$379M
$31K ﹤0.01%
518
+18
+4% +$1.11K
WOMN icon
1703
Impact Shares Womens Empowerment ETF Trading
WOMN
$59.1M
$31K ﹤0.01%
961
– –
WTV icon
1704
WisdomTree US Value Fund
WTV
$3.36B
$31K ﹤0.01%
519
+375
+260% +$22.8K
TRVN
1705
DELISTED
Trevena, Inc.
TRVN
$31K ﹤0.01%
40
– –
GERM
1706
DELISTED
Amplify Treatments, Testing and Advancements ETF
GERM
$31K ﹤0.01%
746
-724
-49% -$30.6K
IXG icon
1707
iShares Global Financials ETF
IXG
$698M
$30K ﹤0.01%
381
-70
-16% -$5.48K
IYM icon
1708
iShares US Basic Materials ETF
IYM
$1.02B
$30K ﹤0.01%
240
– –
MJ icon
1709
Amplify Alternative Harvest ETF
MJ
$111M
$30K ﹤0.01%
174
-17
-9% -$3.47K
PBE icon
1710
Invesco Biotechnology & Genome ETF
PBE
$358M
$30K ﹤0.01%
400
– –
SCHM icon
1711
Schwab US Mid-Cap ETF
SCHM
$15.2B
$30K ﹤0.01%
1,170
+495
+73% +$12.9K
SOCL icon
1712
Global X Social Media ETF
SOCL
$90.3M
$30K ﹤0.01%
487
+2
+0.4% +$131
BLV icon
1713
Vanguard Long-Term Bond ETF
BLV
$5.7B
$29K ﹤0.01%
279
– –
FNOV icon
1714
FT Vest US Equity Buffer ETF November
FNOV
$1.24B
$29K ﹤0.01%
+765
New +$29.1K
HYEM icon
1715
VanEck Emerging Markets High Yield Bond ETF
HYEM
$526M
$29K ﹤0.01%
1,269
– –
IBDT icon
1716
iShares iBonds Dec 2028 Term Corporate ETF
IBDT
$4.07B
$29K ﹤0.01%
1,000
– –
MORT icon
1717
VanEck Mortgage REIT Income ETF
MORT
$373M
$29K ﹤0.01%
1,500
– –
SSO icon
1718
ProShares Ultra S&P500
SSO
$8.39B
$29K ﹤0.01%
980
-288
-23% -$9.1K
EPP icon
1719
iShares MSCI Pacific ex Japan ETF
EPP
$2.26B
$28K ﹤0.01%
572
+280
+96% +$14.3K
SMMD icon
1720
iShares Russell 2500 ETF
SMMD
$3.75B
$28K ﹤0.01%
435
– –
GENZ
1721
VanEck Digital Native Economy ETF
GENZ
$17.5M
$27K ﹤0.01%
549
+29
+6% +$1.45K
AOA icon
1722
iShares Core 80/20 Aggressive Allocation ETF
AOA
$3.28B
$26K ﹤0.01%
369
+1
+0.3% +$71
CSD icon
1723
Invesco S&P Spin-Off ETF
CSD
$232M
$26K ﹤0.01%
410
– –
DWAS icon
1724
Invesco Dorsey Wright SmallCap Momentum ETF
DWAS
$451M
$26K ﹤0.01%
298
– –
GEF.B icon
1725
Greif Class B
GEF.B
$4.24B
$26K ﹤0.01%
400
– –
67 68
69
70 71

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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.