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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
IBDN
851
DELISTED
iShares iBonds Dec 2022 Term Corporate ETF
IBDN
$1.14M ﹤0.01%
44,860
-402
-0.9% -$10.3K
NLY icon
852
Annaly Capital Management
NLY
$17.6B
$1.14M ﹤0.01%
33,122
-14,050
-30% -$476K
KEY icon
853
KeyCorp
KEY
$24.6B
$1.13M ﹤0.01%
56,701
+2,395
+4% +$46.2K
MTX icon
854
Minerals Technologies
MTX
$2.26B
$1.13M ﹤0.01%
14,980
– –
EXPD icon
855
Expeditors International
EXPD
$24.3B
$1.13M ﹤0.01%
10,461
-639
-6% -$61.5K
PDBC icon
856
Invesco Actively Managed Exch-Traded Commodity Fd Tr Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF
PDBC
$6.61B
$1.12M ﹤0.01%
+65,121
New +$1.1M
COR icon
857
Cencora
COR
$59.2B
$1.12M ﹤0.01%
9,492
+3,834
+68% +$415K
PPLI
858
People Inc
PPLI
$3.01B
$1.12M ﹤0.01%
9,487
+7
+0.1% +$869
VONE icon
859
Vanguard Russell 1000 ETF
VONE
$8.74B
$1.12M ﹤0.01%
6,037
– –
HDB icon
860
HDFC Bank
HDB
$119B
$1.11M ﹤0.01%
28,678
+2,188
+8% +$85.8K
RDS.A
861
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
$1.11M ﹤0.01%
28,411
-2,273
-7% -$91.5K
DOC icon
862
Healthpeak Properties
DOC
$14.3B
$1.11M ﹤0.01%
35,063
+4,838
+16% +$147K
NUE icon
863
Nucor
NUE
$61.8B
$1.11M ﹤0.01%
13,825
-217
-2% -$13.2K
CCK icon
864
Crown Holdings
CCK
$12.9B
$1.11M ﹤0.01%
11,401
+539
+5% +$51.9K
NVO
865
Novo Nordisk
NVO
$205B
$1.1M ﹤0.01%
32,770
-6,592
-17% -$235K
ANSS
866
DELISTED
Ansys
ANSS
$1.1M ﹤0.01%
3,240
-81
-2% -$28.8K
KSU
867
DELISTED
Kansas City Southern
KSU
$1.09M ﹤0.01%
4,122
-75
-2% -$16.3K
ALLK
868
DELISTED
Allakos
ALLK
$1.09M ﹤0.01%
9,459
+85
+0.9% +$10.7K
TXG icon
869
10x Genomics
TXG
$7.58B
$1.08M ﹤0.01%
5,946
+1,551
+35% +$268K
FUSB icon
870
First US Bancshares
FUSB
$90.7M
$1.07M ﹤0.01%
115,000
– –
LBRDK icon
871
Liberty Broadband Class C
LBRDK
$5.29B
$1.06M ﹤0.01%
7,087
+298
+4% +$45.1K
LIT icon
872
Global X Lithium & Battery Tech ETF
LIT
$1.6B
$1.06M ﹤0.01%
18,128
+16,973
+1,470% +$1.11M
CLVS
873
DELISTED
Clovis Oncology, Inc.
CLVS
$1.06M ﹤0.01%
+150,950
New +$1.01M
USFR
874
DELISTED
WisdomTree Bloomberg Floating Rate Treasury Fund
USFR
$1.06M ﹤0.01%
42,175
-36,767
-47% -$923K
HYG icon
875
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.9B
$1.06M ﹤0.01%
12,134
-29,322
-71% -$2.55M
33 34
35
36 37

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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.