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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
GRID
1526
First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund
GRID
$12.3B
$141K ﹤0.01%
1,638
– –
CRD.B icon
1527
Crawford & Co Class B
CRD.B
$576M
$140K ﹤0.01%
14,434
– –
DDMXW
1528
DELISTED
DD3 Acquisition Corp. II Warrant
DDMXW
$138K ﹤0.01%
+134,168
New +$216K
AIVL icon
1529
WisdomTree US AI Enhanced Value Fund
AIVL
$436M
$137K ﹤0.01%
1,449
-3,490
-71% -$310K
ITM icon
1530
VanEck Intermediate Muni ETF
ITM
$2.13B
$136K ﹤0.01%
2,662
– –
STIP icon
1531
iShares 0-5 Year TIPS Bond ETF
STIP
$15.9B
$136K ﹤0.01%
1,285
-197
-13% -$20.7K
QVCGA
1532
DELISTED
QVC Group Inc Series A
QVCGA
$135K ﹤0.01%
230
-120
-34% -$73.9K
SWN
1533
DELISTED
Southwestern Energy Company
SWN
$135K ﹤0.01%
29,035
-2,000
-6% -$8.08K
ATHX
1534
DELISTED
Athersys, Inc. Common Stock
ATHX
$135K ﹤0.01%
2,992
+660
+28% +$34.3K
IYE icon
1535
iShares US Energy ETF
IYE
$1.8B
$134K ﹤0.01%
5,109
+201
+4% +$4.95K
AFMD
1536
DELISTED
Affimed
AFMD
$131K ﹤0.01%
1,650
-350
-18% -$22.7K
CWI icon
1537
State Street SPDR MSCI ACWI ex-US ETF
CWI
$2.87B
$131K ﹤0.01%
4,533
-457
-9% -$13.2K
EMAN
1538
DELISTED
eMagin Corporation
EMAN
$131K ﹤0.01%
35,100
– –
SCHA icon
1539
Schwab U.S Small- Cap ETF
SCHA
$23.3B
$130K ﹤0.01%
5,196
-392
-7% -$9.64K
OPPE
1540
WisdomTree European Opportunities Fund
OPPE
$295M
$127K ﹤0.01%
3,750
– –
LGF.A
1541
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
$127K ﹤0.01%
8,500
+2,000
+31% +$30K
DGS icon
1542
WisdomTree Emerging Markets SmallCap Dividend Fund
DGS
$1.78B
$125K ﹤0.01%
2,443
– –
OR icon
1543
OR Royalties Inc
OR
$6.31B
$124K ﹤0.01%
11,265
-4,000
-26% -$45.7K
DDG
1544
DELISTED
Proshares Short Oil & Gas
DDG
$124K ﹤0.01%
6,520
-2,000
-23% -$41.6K
GSJY icon
1545
Goldman Sachs ActiveBeta Japan Equity ETF
GSJY
$88.7M
$123K ﹤0.01%
3,240
-369
-10% -$14.1K
LBTYA icon
1546
Liberty Global Class A
LBTYA
$3.55B
$121K ﹤0.01%
4,732
– –
IDU icon
1547
iShares US Utilities ETF
IDU
$1.37B
$119K ﹤0.01%
1,490
-1,360
-48% -$105K
OSW icon
1548
OneSpaWorld
OSW
$2.7B
$119K ﹤0.01%
11,205
-17,600
-61% -$178K
SPIP icon
1549
State Street SPDR Portfolio TIPS ETF
SPIP
$1.01B
$119K ﹤0.01%
3,904
+1
+0% +$31
TACO
1550
DELISTED
Del Taco Restaurants, Inc. Common Stock
TACO
$118K ﹤0.01%
12,300
-4,700
-28% -$47.8K
60 61
62
63 64

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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.