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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
SPH icon
1201
Suburban Propane Partners
SPH
$1.18B
$414K ﹤0.01%
27,923
+1,280
+5% +$19.4K
SYRE icon
1202
Spyre Therapeutics
SYRE
$9B
$413K ﹤0.01%
2,088
– –
CLGX
1203
DELISTED
Corelogic, Inc.
CLGX
$412K ﹤0.01%
5,197
+1,803
+53% +$144K
EWBC icon
1204
East-West Bancorp
EWBC
$18.6B
$409K ﹤0.01%
5,538
+165
+3% +$11.2K
HUBG icon
1205
HUB Group
HUBG
$2.58B
$409K ﹤0.01%
12,150
– –
EME icon
1206
Emcor
EME
$36.9B
$407K ﹤0.01%
+3,629
New +$364K
KR icon
1207
Kroger
KR
$35.1B
$407K ﹤0.01%
11,301
– –
NTAP icon
1208
NetApp
NTAP
$40.4B
$407K ﹤0.01%
5,604
+234
+4% +$15.7K
AL
1209
DELISTED
Air Lease Corp
AL
$404K ﹤0.01%
8,235
– –
FCBC icon
1210
First Community Bankshares
FCBC
$929M
$404K ﹤0.01%
13,459
– –
FEZ icon
1211
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.56B
$404K ﹤0.01%
9,082
+1,000
+12% +$43.1K
IBRX icon
1212
ImmunityBio
IBRX
$8.14B
$404K ﹤0.01%
+17,000
New +$441K
MGPI icon
1213
MGP Ingredients
MGPI
$394M
$404K ﹤0.01%
6,830
-1,000
-13% -$60.6K
RNR icon
1214
RenaissanceRe
RNR
$13.3B
$403K ﹤0.01%
2,513
-105
-4% -$17K
HAIN icon
1215
Hain Celestial
HAIN
$54.3M
$402K ﹤0.01%
9,224
+2,971
+48% +$126K
QLTA icon
1216
iShares AAA-A Rated Corporate Bond ETF
QLTA
$1.22B
$402K ﹤0.01%
7,249
+5,592
+337% +$317K
EAGG icon
1217
iShares ESG Aware US Aggregate Bond ETF
EAGG
$4.99B
$401K ﹤0.01%
7,336
+62
+0.9% +$3.44K
IYZ icon
1218
iShares US Telecommunications ETF
IYZ
$1.24B
$401K ﹤0.01%
12,398
+4,383
+55% +$138K
RGT
1219
Royce Global Value Trust
RGT
$101M
$401K ﹤0.01%
28,195
– –
ENPH icon
1220
Enphase Energy
ENPH
$5.37B
$400K ﹤0.01%
2,466
+392
+19% +$70.4K
TLTD icon
1221
FlexShares Morningstar Developed Markets ex-US Factor Tilt Index Fund
TLTD
$691M
$399K ﹤0.01%
5,705
– –
LAD icon
1222
Lithia Motors
LAD
$8.3B
$398K ﹤0.01%
1,020
-8
-0.8% -$2.87K
KL
1223
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
$396K ﹤0.01%
11,712
+4,054
+53% +$150K
BRKL
1224
DELISTED
Brookline Bancorp
BRKL
$393K ﹤0.01%
26,210
– –
DBX icon
1225
Dropbox
DBX
$7.53B
$393K ﹤0.01%
+14,750
New +$355K
47 48
49
50 51

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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.