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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
GEF icon
1201
Greif
GEF
$5.05B
$432K ﹤0.01%
6,685
– –
RGT
1202
Royce Global Value Trust
RGT
$101M
$432K ﹤0.01%
27,945
-250
-0.9% -$3.88K
SMDV icon
1203
ProShares Russell 2000 Dividend Growers ETF
SMDV
$707M
$432K ﹤0.01%
7,009
– –
EWC icon
1204
iShares MSCI Canada ETF
EWC
$6.53B
$430K ﹤0.01%
11,851
+7,074
+148% +$263K
IYJ icon
1205
iShares US Industrials ETF
IYJ
$1.96B
$430K ﹤0.01%
4,016
+480
+14% +$53.9K
EMN icon
1206
Eastman Chemical
EMN
$8.38B
$429K ﹤0.01%
4,255
-1,207
-22% -$133K
PINS icon
1207
Pinterest
PINS
$13.3B
$429K ﹤0.01%
8,424
-3,445
-29% -$212K
FCBC icon
1208
First Community Bankshares
FCBC
$929M
$427K ﹤0.01%
13,459
– –
SIEN
1209
DELISTED
Sientra, Inc.
SIEN
$427K ﹤0.01%
7,457
+1,133
+18% +$77.4K
NFE icon
1210
New Fortress Energy
NFE
$93.3M
$423K ﹤0.01%
15,240
+1,435
+10% +$43.3K
PSEC icon
1211
Prospect Capital
PSEC
$1.18B
$419K ﹤0.01%
54,400
+2,000
+4% +$16.1K
THFF icon
1212
First Financial Corp
THFF
$978M
$419K ﹤0.01%
9,959
– –
VTR icon
1213
Ventas
VTR
$46.2B
$419K ﹤0.01%
+7,591
New +$435K
HUBG icon
1214
HUB Group
HUBG
$2.57B
$418K ﹤0.01%
12,150
– –
STAA icon
1215
STAAR Surgical
STAA
$1.27B
$418K ﹤0.01%
3,250
-380
-10% -$53.2K
GAP
1216
The Gap Inc
GAP
$7.31B
$418K ﹤0.01%
+18,430
New +$509K
UUP icon
1217
Invesco DB US Dollar Index Bullish Fund
UUP
$415M
$417K ﹤0.01%
16,475
– –
TRI icon
1218
Thomson Reuters
TRI
$46B
$416K ﹤0.01%
3,570
+172
+5% +$20K
VIRX
1219
DELISTED
Viracta Therapeutics, Inc. Common Stock
VIRX
$416K ﹤0.01%
51,843
– –
HLT icon
1220
Hilton Worldwide
HLT
$72B
$415K ﹤0.01%
3,142
-50
-2% -$6.32K
SYRE icon
1221
Spyre Therapeutics
SYRE
$8.99B
$415K ﹤0.01%
2,088
– –
ESS icon
1222
Essex Property Trust
ESS
$18.6B
$414K ﹤0.01%
+1,296
New +$419K
FPE icon
1223
First Trust Preferred Securities and Income ETF
FPE
$6.34B
$411K ﹤0.01%
20,005
+10,164
+103% +$210K
INSM icon
1224
Insmed
INSM
$28B
$410K ﹤0.01%
14,886
– –
TLTD icon
1225
FlexShares Morningstar Developed Markets ex-US Factor Tilt Index Fund
TLTD
$691M
$410K ﹤0.01%
5,705
– –
47 48
49
50 51

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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.