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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
(-2.8%)
Cap. Flow
-$1.09B
Cap. Flow
% of AUM
-4.11%
Top 10 Holdings %
Top 10 Hldgs %
22.54%
Holding
1,941
New
123
Increased
715
Reduced
742
Closed
84
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
CarMax
KMX
|
+$73M |
| 2 |
OSH
Oak Street Health, Inc.
OSH
|
+$60.6M |
| 3 |
iRhythm Holdings
IRTC
|
+$51.2M |
| 4 |
DexCom
DXCM
|
+$39.4M |
| 5 |
Aon
AON
|
+$30.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$449M |
| 2 |
Vanguard Morningstar Growth ETF
VUG
|
+$271M |
| 3 |
Amazon
AMZN
|
+$157M |
| 4 |
Microsoft
MSFT
|
+$83.3M |
| 5 |
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 | |
|---|---|---|---|---|---|---|
1101
Cerence
CRNC
$389M
| $529K | ﹤0.01% |
5,904
+159
| +3% | +$17.5K |
|
1102
Datadog
DDOG
$90.6B
| $529K | ﹤0.01% |
6,353
-2,094
| -25% | -$202K |
|
|
CMA
1103
DELISTED
Comerica
CMA
| $527K | ﹤0.01% |
7,349
+1,144
| +18% | +$74.9K |
|
1104
Wolfspeed
WOLF
$1.64B
| $522K | ﹤0.01% |
4,831
-946
| -16% | -$106K |
|
1105
iShares US Healthcare ETF
IYH
$3.77B
| $518K | ﹤0.01% |
10,260
-1,210
| -11% | -$60.8K |
|
1106
Primerica
PRI
$9.62B
| $517K | ﹤0.01% |
3,497
+2,000
| +134% | +$287K |
|
1107
Vanguard Intermediate-Term Treasury ETF
VGIT
$42.5B
| $517K | ﹤0.01% |
7,685
-617
| -7% | -$42.2K |
|
|
RDS.B
1108
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $517K | ﹤0.01% |
14,045
+4,784
| +52% | +$183K |
|
1109
Pediatrix Medical
MD
$2.14B
| $515K | ﹤0.01% |
20,228
| – | – |
|
1110
Olin
OLN
$2.17B
| $511K | ﹤0.01% |
13,450
+1,300
| +11% | +$39.4K |
|
1111
Avantor
AVTR
$9.37B
| $503K | ﹤0.01% |
+17,403
| New | +$502K |
|
1112
iShares US Financials ETF
IYF
$4.44B
| $503K | ﹤0.01% |
6,722
-532
| -7% | -$37.8K |
|
1113
Certara
CERT
$1.24B
| $502K | ﹤0.01% |
18,399
+11,976
| +186% | +$398K |
|
1114
Ionis Pharmaceuticals
IONS
$9.28B
| $502K | ﹤0.01% |
11,164
-4,000
| -26% | -$223K |
|
1115
MSCI
MSCI
$41.8B
| $502K | ﹤0.01% |
1,197
-205
| -15% | -$86.1K |
|
1116
iShares MSCI USA Quality Factor ETF
QUAL
$48.4B
| $499K | ﹤0.01% |
4,099
+251
| +7% | +$29.6K |
|
1117
ROBO Global Robotics & Automation Index ETF
ROBO
$2.13B
| $498K | ﹤0.01% |
7,846
-16
| -0.2% | -$1.05K |
|
1118
Thryv Holdings
THRY
$96.9M
| $498K | ﹤0.01% |
21,270
+8,075
| +61% | +$163K |
|
|
LSXMK
1119
DELISTED
Liberty Media Corporation Series C Liberty SiriusXM Common Stock
LSXMK
| $498K | ﹤0.01% |
14,572
+601
| +4% | +$20.2K |
|
1120
McKesson
MCK
$99.9B
| $496K | ﹤0.01% |
2,545
+54
| +2% | +$9.86K |
|
1121
Fidelity MSCI Utilities Index ETF
FUTY
$2.31B
| $495K | ﹤0.01% |
11,927
-283
| -2% | -$11.4K |
|
1122
TG Therapeutics
TGTX
$7.34B
| $494K | ﹤0.01% |
10,250
| – | – |
|
1123
Vanguard S&P Small-Cap 600 ETF
VIOO
$4.35B
| $494K | ﹤0.01% |
4,966
+24
| +0.5% | +$2.29K |
|
|
RNTX
1124
Rein Therapeutics
RNTX
$67.4M
| $494K | ﹤0.01% |
17,280
+3,880
| +29% | +$133K |
|
1125
Devon Energy
DVN
$48.8B
| $492K | ﹤0.01% |
22,523
+2,770
| +14% | +$57K |
|
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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.