We are live on ! Find out more
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
TAK icon
1401
Takeda Pharmaceutical
TAK
$55.6B
$242K ﹤0.01%
13,249
+336
+3% +$6.04K
CLSK icon
1402
CleanSpark
CLSK
$3.23B
$241K ﹤0.01%
+10,100
New +$285K
NEPH icon
1403
Nephros
NEPH
$47.9M
$241K ﹤0.01%
36,249
– –
HYFM icon
1404
Hydrofarm Holdings
HYFM
$8.29M
$238K ﹤0.01%
+394
New +$276K
AWH
1405
DELISTED
Aspira Women's Health Inc. Common Stock
AWH
$238K ﹤0.01%
+2,355
New +$259K
CLOVW
1406
DELISTED
Clover Health Investments, Corp. Warrants
CLOVW
$238K ﹤0.01%
+147,782
New +$421K
WBD icon
1407
Warner Bros
WBD
$70.1B
$237K ﹤0.01%
5,463
-1,140
-17% -$56.9K
NCNO icon
1408
nCino
NCNO
$2.13B
$236K ﹤0.01%
+3,531
New +$252K
TECK icon
1409
Teck Resources
TECK
$31.8B
$236K ﹤0.01%
12,281
-1,245
-9% -$25.2K
XLG icon
1410
Invesco S&P 500 Top 50 ETF
XLG
$11B
$236K ﹤0.01%
7,950
– –
NVCR icon
1411
NovoCure
NVCR
$2.06B
$235K ﹤0.01%
1,775
+200
+13% +$31.6K
XLRN
1412
DELISTED
Acceleron Pharma
XLRN
$235K ﹤0.01%
1,735
– –
CMD
1413
DELISTED
Cantel Medical Corporation
CMD
$234K ﹤0.01%
2,937
– –
HES
1414
DELISTED
Hess
HES
$233K ﹤0.01%
+3,291
New +$210K
VMD icon
1415
Viemed Healthcare
VMD
$358M
$233K ﹤0.01%
23,000
– –
ST icon
1416
Sensata Technologies
ST
$6.69B
$232K ﹤0.01%
+4,007
New +$231K
AB icon
1417
AllianceBernstein
AB
$3.42B
$231K ﹤0.01%
5,776
-1,000
-15% -$37.5K
MUFG icon
1418
Mitsubishi UFJ Financial
MUFG
$261B
$231K ﹤0.01%
42,916
+2,916
+7% +$15K
SIMO icon
1419
Silicon Motion
SIMO
$8.33B
$231K ﹤0.01%
+3,896
New +$222K
TDIV icon
1420
First Trust NASDAQ Technology Dividend Index Fund
TDIV
$4.48B
$231K ﹤0.01%
4,280
– –
AG icon
1421
First Majestic Silver
AG
$9.21B
$230K ﹤0.01%
14,767
-24,500
-62% -$393K
TM icon
1422
Toyota
TM
$222B
$229K ﹤0.01%
1,470
+156
+12% +$23.6K
RSPH icon
1423
Invesco S&P 500 Equal Weight Health Care ETF
RSPH
$799M
$228K ﹤0.01%
8,500
-1,000
-11% -$26.6K
DRE
1424
DELISTED
Duke Realty Corp.
DRE
$228K ﹤0.01%
5,427
-1,324
-20% -$53.4K
ASB icon
1425
Associated Banc-Corp
ASB
$6.11B
$227K ﹤0.01%
10,619
-1,815
-15% -$36.8K
55 56
57
58 59

Similar funds

Parallax Volatility Advisers
Parallax Volatility Advisers San Francisco, California $38.6B AUM 45.89% 1-Year Est. Return
Credit Agricole
Credit Agricole Montrouge Cedex, France $38.1B AUM
Carson Wealth (CWM LLC)
Carson Wealth (CWM LLC) Omaha, Nebraska $38.1B AUM 19.66% 1-Year Est. Return
Nomura Asset Management
Nomura Asset Management Tokyo, Japan $38.8B AUM 30.94% 1-Year Est. Return
Nomura Holdings
Nomura Holdings Tokyo, Japan $37.7B AUM 34.44% 1-Year Est. Return
Fayez Sarofim & Co
Fayez Sarofim & Co Houston, Texas $39.1B AUM 15.14% 1-Year Est. Return
HF
HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return
First Manhattan
First Manhattan New York $36.1B AUM 11.5% 1-Year Est. Return

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.