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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
KRT icon
1051
Karat Packaging
KRT
$953M
$673K ﹤0.01%
32,018
– –
MCY icon
1052
Mercury Insurance
MCY
$5.81B
$671K ﹤0.01%
12,060
+623
+5% +$37.2K
TWI icon
1053
Titan International
TWI
$438M
$669K ﹤0.01%
93,500
– –
VXUS icon
1054
Vanguard Total International Stock ETF
VXUS
$164B
$667K ﹤0.01%
10,537
+595
+6% +$38.8K
OLED icon
1055
Universal Display
OLED
$4.18B
$665K ﹤0.01%
3,890
-30
-0.8% -$6.21K
AGGY icon
1056
WisdomTree Yield Enhanced US Aggregate Bond Fund
AGGY
$926M
$662K ﹤0.01%
12,752
+13
+0.1% +$684
DOC icon
1057
Healthpeak Properties
DOC
$14.3B
$655K ﹤0.01%
19,570
-1,091
-5% -$38.6K
IJS icon
1058
iShares S&P Small-Cap 600 Value ETF
IJS
$8.43B
$653K ﹤0.01%
6,486
-245
-4% -$24.7K
BECN
1059
DELISTED
Beacon Roofing Supply, Inc.
BECN
$652K ﹤0.01%
13,657
-15
-0.1% -$777
ALB icon
1060
Albemarle
ALB
$15.4B
$651K ﹤0.01%
2,972
+219
+8% +$46.8K
EVRG icon
1061
Evergy
EVRG
$19.3B
$648K ﹤0.01%
10,418
-399
-4% -$26.2K
ITGR icon
1062
Integer Holdings
ITGR
$4.25B
$643K ﹤0.01%
7,199
-13
-0.2% -$1.22K
QTRX icon
1063
Quanterix
QTRX
$135M
$640K ﹤0.01%
12,860
+200
+2% +$10.3K
USD icon
1064
ProShares Ultra Semiconductors
USD
$2.99B
$640K ﹤0.01%
74,800
– –
ADEA icon
1065
Adeia
ADEA
$3.16B
$639K ﹤0.01%
128,229
+8,354
+7% +$45K
RWX icon
1066
State Street SPDR Dow Jones International Real Estate ETF
RWX
$267M
$638K ﹤0.01%
17,970
– –
SUSC icon
1067
iShares ESG Aware USD Corporate Bond ETF
SUSC
$1.29B
$638K ﹤0.01%
23,202
-36,618
-61% -$1.02M
VFH icon
1068
Vanguard Financials ETF
VFH
$14B
$638K ﹤0.01%
6,889
+486
+8% +$44.8K
THW
1069
abrdn World Healthcare Fund
THW
$560M
$636K ﹤0.01%
38,681
– –
UYG icon
1070
ProShares Ultra Financials
UYG
$863M
$636K ﹤0.01%
10,035
– –
DEN
1071
DELISTED
Denbury Inc.
DEN
$629K ﹤0.01%
8,958
+100
+1% +$6.9K
JHMM icon
1072
John Hancock Multifactor Mid Cap ETF
JHMM
$6.18B
$628K ﹤0.01%
12,167
+1,156
+10% +$60.8K
LVS icon
1073
Las Vegas Sands
LVS
$29.6B
$628K ﹤0.01%
17,154
+4,885
+40% +$210K
BSX icon
1074
Boston Scientific
BSX
$74.9B
$627K ﹤0.01%
14,442
-2,170
-13% -$96K
EPI icon
1075
WisdomTree India Earnings Fund ETF
EPI
$2.04B
$626K ﹤0.01%
16,747
+300
+2% +$10.7K
41 42
43
44 45

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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.