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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
+2.39%
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
$26.5B
AUM Growth
-$769M
Cap. Flow
-$1.09B
Cap. Flow %
-4.11%
Top 10 Hldgs %
22.54%
Holding
1,941
New
123
Increased
715
Reduced
742
Closed
84

Top Buys

Rank Stock Value
1
KMX icon
CarMax
KMX
+$73M
2
OSH
Oak Street Health, Inc.
OSH
+$60.6M
3
IRTC icon
iRhythm Holdings
IRTC
+$51.2M
4
DXCM icon
DexCom
DXCM
+$39.4M
5
AON icon
Aon
AON
+$30.5M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$449M
2
VUG icon
Vanguard Morningstar Growth ETF
VUG
+$271M
3
AMZN icon
Amazon
AMZN
+$157M
4
MSFT icon
Microsoft
MSFT
+$83.3M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$78.4M

Sector Composition

Rank Sector Weight
1 Technology 25.67%
2 Healthcare 19.26%
3 Financials 11.68%
4 Consumer Discretionary 10.53%
5 Industrials 9.66%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
LBTYK icon
1176
Liberty Global Class C
LBTYK
$3.48B
$436K ﹤0.01%
17,058
-11
-0.1% -$275
ARGX icon
1177
argenx
ARGX
$53.6B
$434K ﹤0.01%
1,575
– –
RILY icon
1178
BRC Group Holdings
RILY
$303M
$432K ﹤0.01%
+7,656
New +$413K
CURO
1179
DELISTED
CURO Group Holdings Corp.
CURO
$431K ﹤0.01%
29,540
– –
FXI icon
1180
iShares China Large-Cap ETF
FXI
$4.16B
$430K ﹤0.01%
9,223
– –
CLR
1181
DELISTED
CONTINENTAL RESOURCES INC.
CLR
$430K ﹤0.01%
16,620
– –
ALB icon
1182
Albemarle
ALB
$15.4B
$428K ﹤0.01%
2,930
+705
+32% +$113K
ONTF
1183
DELISTED
ON24
ONTF
$428K ﹤0.01%
+8,815
New +$514K
BNDX icon
1184
Vanguard Total International Bond ETF
BNDX
$83B
$424K ﹤0.01%
7,423
+102
+1% +$5.89K
FDN icon
1185
First Trust Dow Jones Internet Index Fund ETF
FDN
$5.45B
$424K ﹤0.01%
1,944
-2,500
-56% -$556K
SBH icon
1186
Sally Beauty Holdings
SBH
$1.56B
$423K ﹤0.01%
21,000
– –
LDOS icon
1187
Leidos
LDOS
$17.9B
$422K ﹤0.01%
4,386
+1,563
+55% +$158K
QYLD icon
1188
Global X NASDAQ-100 Covered Call ETF
QYLD
$8.29B
$421K ﹤0.01%
18,645
+1,250
+7% +$28.5K
WDFC icon
1189
WD-40
WDFC
$3.11B
$421K ﹤0.01%
1,375
+367
+36% +$111K
TLMD
1190
DELISTED
SOC Telemed, Inc. Class A Common Stock
TLMD
$421K ﹤0.01%
66,900
+22,870
+52% +$172K
FXO icon
1191
First Trust Financials AlphaDEX Fund
FXO
$1.14B
$420K ﹤0.01%
10,095
+9,980
+8,678% +$388K
STAG icon
1192
STAG Industrial
STAG
$7.12B
$419K ﹤0.01%
12,465
– –
MLR icon
1193
Miller Industries
MLR
$634M
$418K ﹤0.01%
+9,050
New +$379K
GAP
1194
The Gap Inc
GAP
$7.35B
$417K ﹤0.01%
13,989
-72
-0.5% -$1.79K
FVRR icon
1195
Fiverr
FVRR
$328M
$416K ﹤0.01%
1,915
+625
+48% +$153K
HLI icon
1196
Houlihan Lokey
HLI
$9.15B
$416K ﹤0.01%
6,261
+2,356
+60% +$159K
MITK icon
1197
Mitek Systems
MITK
$854M
$416K ﹤0.01%
+28,534
New +$458K
PIZ icon
1198
Invesco Dorsey Wright Developed Markets Momentum ETF
PIZ
$744M
$416K ﹤0.01%
12,255
+2,535
+26% +$86.4K
UUP icon
1199
Invesco DB US Dollar Index Bullish Fund
UUP
$415M
$416K ﹤0.01%
16,550
-75
-0.5% -$1.84K
RDVY icon
1200
First Trust Rising Dividend Achievers ETF
RDVY
$25.8B
$415K ﹤0.01%
9,131
+5,131
+128% +$219K
46 47
48
49 50

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William Blair & Company's Q1 2021 Portfolio in Review

As of Q1 2021, William Blair & Company held 1,941 positions worth $26.5B, down 2.8% from $27.3B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

William Blair & Company withdrew a net $1.09B in Q1 2021, closing 84 positions and reducing 742 holdings. Its most notable exit was HMS Holdings Corp., an estimated $7.64M position sold in full.

By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 28% a quarter earlier, followed by Healthcare and Financials.

Against the trend, William Blair & Company opened a new position in Oak Street Health, Inc. worth $59.1M.

  • William Blair & Company's largest Q1 2021 buy was Oak Street Health, Inc.: 1,089,318 shares worth $59.1M.
  • William Blair & Company added most to CarMax in Q1 2021, an estimated $73M increase.
  • William Blair & Company's biggest Q1 2021 reduction was Apple, cutting an estimated $449M.
  • William Blair & Company fully exited HMS Holdings Corp. in Q1 2021, selling an estimated $7.64M.
  • William Blair & Company's ten largest holdings make up 23% of its $26.5B portfolio in Q1 2021.
  • William Blair & Company opened 123 new positions and closed 84 in Q1 2021.
  • William Blair & Company's portfolio value fell 2.8% quarter-over-quarter to $26.5B.

Based on William Blair & Company's 13F filing for Q1 2021, filed 13 May 2021.