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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
ATHM icon
1451
Autohome
ATHM
$2.65B
$213K ﹤0.01%
+2,279
New +$253K
FE icon
1452
FirstEnergy
FE
$27.2B
$213K ﹤0.01%
+6,144
New +$201K
SCHR
1453
Schwab Intermediately-Term US Treasury ETF
SCHR
$13.3B
$212K ﹤0.01%
7,506
+3,808
+103% +$109K
INVH icon
1454
Invitation Homes
INVH
$17.7B
$211K ﹤0.01%
+6,597
New +$198K
IWX icon
1455
iShares Russell Top 200 Value ETF
IWX
$4.03B
$211K ﹤0.01%
3,305
– –
ROAD icon
1456
Construction Partners
ROAD
$6.9B
$211K ﹤0.01%
+7,056
New +$213K
FUL icon
1457
H.B. Fuller
FUL
$3.24B
$210K ﹤0.01%
+3,341
New +$190K
IPGP icon
1458
IPG Photonics
IPGP
$3.71B
$209K ﹤0.01%
989
-1,050
-51% -$239K
EDU icon
1459
New Oriental
EDU
$8.49B
$207K ﹤0.01%
1,476
+382
+35% +$66.7K
SKM icon
1460
SK Telecom
SKM
$13.5B
$207K ﹤0.01%
+4,613
New +$191K
GRFS
1461
Grifois
GRFS
$5.4B
$206K ﹤0.01%
11,887
+13
+0.1% +$225
MDYV icon
1462
State Street SPDR S&P 400 Mid Cap Value ETF
MDYV
$2.88B
$206K ﹤0.01%
3,154
-244
-7% -$15K
BIO icon
1463
Bio-Rad Laboratories Class A
BIO
$9.68B
$204K ﹤0.01%
358
-9
-2% -$5.33K
VYX icon
1464
NCR Voyix
VYX
$1.12B
$204K ﹤0.01%
8,776
-544
-6% -$12K
MFNC
1465
DELISTED
Mackinac Financial Corporation
MFNC
$204K ﹤0.01%
14,568
– –
BIPC icon
1466
Brookfield Infrastructure
BIPC
$4.93B
$203K ﹤0.01%
+3,980
New +$180K
CE icon
1467
Celanese
CE
$4.75B
$203K ﹤0.01%
+1,358
New +$187K
IAA
1468
DELISTED
IAA, Inc. Common Stock
IAA
$203K ﹤0.01%
3,685
– –
VRIG icon
1469
Invesco Variable Rate Investment Grade ETF
VRIG
$1.85B
$199K ﹤0.01%
7,935
– –
QQQH
1470
NEOS Nasdaq-100 Hedged Equity Income ETF
QQQH
$386M
$198K ﹤0.01%
3,700
+1,850
+100% +$102K
AGZ icon
1471
iShares Agency Bond ETF
AGZ
$564M
$196K ﹤0.01%
+1,665
New +$198K
VPU
1472
Vanguard Utilities ETF
VPU
$8.48B
$196K ﹤0.01%
1,392
+37
+3% +$5.04K
FPE icon
1473
First Trust Preferred Securities and Income ETF
FPE
$6.33B
$194K ﹤0.01%
9,609
-934
-9% -$18.9K
PCY icon
1474
Invesco Emerging Markets Sovereign Debt ETF
PCY
$1.39B
$193K ﹤0.01%
7,206
+609
+9% +$16.9K
BIL icon
1475
State Street SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$46.7B
$192K ﹤0.01%
2,097
-155
-7% -$14.2K
57 58
59
60 61

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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.