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William Blair & Company Portfolio holdings
AUM
$34.9B
1-Year Est. Return
18.88%
This Fund
S&P 500
This Quarter
Est. Return
+2.39%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+512.03%
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 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 | |
|---|---|---|---|---|---|---|
|
1
Microsoft
MSFT
$2.93T
| $866M | 3.27% |
3,671,284
-358,935
| -9% | -$83.3M |
|
|
2
Apple
AAPL
$4.99T
| $830M | 3.13% |
6,796,319
-3,498,833
| -34% | -$449M |
|
|
3
Amazon
AMZN
$2.45T
| $808M | 3.05% |
5,225,680
-989,540
| -16% | -$157M |
|
4
Idexx Laboratories
IDXX
$44.8B
| $680M | 2.57% |
1,390,196
-88,432
| -6% | -$44.3M |
|
5
PayPal
PYPL
$50.3B
| $541M | 2.04% |
2,225,860
-232,564
| -9% | -$58.7M |
|
6
Visa
V
$707B
| $501M | 1.89% |
2,367,073
-214,824
| -8% | -$45.2M |
|
7
Veeva Systems
VEEV
$33.8B
| $485M | 1.83% |
1,856,522
-24,926
| -1% | -$6.94M |
|
|
8
DexCom
DXCM
$29.3B
| $426M | 1.61% |
4,746,652
+419,488
| +10% | +$39.4M |
|
9
Mastercard
MA
$501B
| $425M | 1.61% |
1,195,012
+8,900
| +0.8% | +$3.11M |
|
|
10
Alphabet (Google) Class C
GOOG
$4.07T
| $411M | 1.55% |
3,971,520
-790,300
| -17% | -$78.4M |
|
11
Starbucks
SBUX
$118B
| $407M | 1.53% |
3,722,128
-110,490
| -3% | -$11.6M |
|
12
Zoetis
ZTS
$32.9B
| $383M | 1.44% |
2,432,162
-83,618
| -3% | -$13.2M |
|
13
Danaher
DHR
$141B
| $360M | 1.36% |
1,804,026
-4,800
| -0.3% | -$975K |
|
14
Workday
WDAY
$41B
| $347M | 1.31% |
1,397,774
+52,966
| +4% | +$13.1M |
|
|
DOCU
15
DocuSign
DOCU
$11B
| $336M | 1.27% |
1,658,869
-99,950
| -6% | -$23.2M |
|
16
Adobe
ADBE
$104B
| $327M | 1.23% |
688,554
-76,154
| -10% | -$35.6M |
|
|
FISV
17
Fiserv Inc
FISV
$29.5B
| $311M | 1.17% |
2,609,816
+156,025
| +6% | +$17.9M |
|
18
Ecolab
ECL
$79.1B
| $288M | 1.09% |
1,345,785
+77,161
| +6% | +$16.4M |
|
|
19
Alphabet (Google) Class A
GOOGL
$4.09T
| $251M | 0.95% |
2,436,220
-6,600
| -0.3% | -$651K |
|
20
JPMorgan Chase
JPM
$931B
| $250M | 0.94% |
1,644,636
-18,725
| -1% | -$2.69M |
|
|
21
CarMax
KMX
$8.64B
| $246M | 0.93% |
1,851,658
+599,915
| +48% | +$73M |
|
22
Salesforce
CRM
$153B
| $236M | 0.89% |
1,115,442
-19,170
| -2% | -$4.27M |
|
23
CoStar Group
CSGP
$11.9B
| $216M | 0.81% |
2,626,460
+40,540
| +2% | +$3.5M |
|
24
State Street SPDR S&P 500 ETF Trust
SPY
$777B
| $208M | 0.78% |
524,088
-29,772
| -5% | -$11.5M |
|
25
Abbott
ABT
$191B
| $203M | 0.77% |
1,697,015
-90,522
| -5% | -$10.7M |
|
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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.