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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
IXJ icon
1551
iShares Global Healthcare ETF
IXJ
$4.23B
$117K ﹤0.01%
1,514
+1
+0.1% +$77
ACOR
1552
DELISTED
Acorda Therapeutics
ACOR
$116K ﹤0.01%
+1,192
New +$146K
IFLN
1553
Invesco Bloomberg Enhanced Fallen Angels ETF
IFLN
$306M
$114K ﹤0.01%
5,907
+1,629
+38% +$31.5K
NEAR icon
1554
iShares Short Maturity Bond ETF
NEAR
$4.88B
$111K ﹤0.01%
2,217
– –
XLRE icon
1555
State Street Real Estate Select Sector SPDR ETF
XLRE
$8.56B
$111K ﹤0.01%
2,810
-271
-9% -$10.2K
ILF icon
1556
iShares Latin America 40 ETF
ILF
$3.71B
$110K ﹤0.01%
4,000
+572
+17% +$16.2K
EWY icon
1557
iShares MSCI South Korea ETF
EWY
$27.2B
$109K ﹤0.01%
1,219
+62
+5% +$5.64K
FAX
1558
abrdn Asia-Pacific Income Fund
FAX
$601M
$109K ﹤0.01%
4,433
– –
SPHD icon
1559
Invesco S&P 500 High Dividend Low Volatility ETF
SPHD
$3.39B
$108K ﹤0.01%
2,524
+6
+0.2% +$241
PIO icon
1560
Invesco Global Water ETF
PIO
$278M
$106K ﹤0.01%
2,934
– –
SCHD icon
1561
Schwab US Dividend Equity ETF
SCHD
$107B
$106K ﹤0.01%
4,350
-648
-13% -$14.7K
SPIB icon
1562
State Street SPDR Portfolio Intermediate Term Corporate Bond ETF
SPIB
$11.5B
$105K ﹤0.01%
2,906
+1
+0% +$37
EWG icon
1563
iShares MSCI Germany ETF
EWG
$1.67B
$104K ﹤0.01%
3,114
– –
PXH icon
1564
Invesco FTSE RAFI Emerging Markets ETF
PXH
$1.97B
$104K ﹤0.01%
4,604
+4,602
+230,100% +$103K
INTF icon
1565
iShares International Equity Factor ETF
INTF
$3.75B
$97K ﹤0.01%
3,380
– –
IVOO icon
1566
Vanguard S&P Mid-Cap 400 ETF
IVOO
$3.93B
$97K ﹤0.01%
1,104
+2
+0.2% +$169
MCHI icon
1567
iShares MSCI China ETF
MCHI
$6.21B
$96K ﹤0.01%
1,179
+419
+55% +$36.7K
RPG icon
1568
Invesco S&P 500 Pure Growth ETF
RPG
$2.07B
$96K ﹤0.01%
2,935
-1,900
-39% -$62.8K
PMD
1569
DELISTED
Psychemedics Corporation
PMD
$96K ﹤0.01%
15,500
-9,000
-37% -$59.6K
BKLN icon
1570
Invesco Senior Loan ETF
BKLN
$6.75B
$95K ﹤0.01%
4,287
+1,219
+40% +$27.2K
PFXF icon
1571
VanEck Preferred Securities ex Financials ETF
PFXF
$2.47B
$95K ﹤0.01%
4,565
– –
EWZ icon
1572
iShares MSCI Brazil ETF
EWZ
$8.57B
$94K ﹤0.01%
2,805
– –
GBIL icon
1573
Goldman Sachs Access Treasury 0-1 Year ETF
GBIL
$7.59B
$94K ﹤0.01%
935
+886
+1,808% +$88.7K
NNDM
1574
Nano Dimension
NNDM
$343M
$94K ﹤0.01%
+11,000
New +$126K
SPSM icon
1575
State Street SPDR Portfolio S&P 600 Small Cap ETF
SPSM
$17.5B
$94K ﹤0.01%
2,231
+1,950
+694% +$79.5K
61 62
63
64 65

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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.