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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 | |
|---|---|---|---|---|---|---|
76
Linde
LIN
$221B
| $79.3M | 0.3% |
282,957
+17,336
| +7% | +$4.5M |
|
77
Berkshire Hathaway Class B
BRK.B
$1.09T
| $78.5M | 0.3% |
307,470
-50,961
| -14% | -$12.4M |
|
78
McDonald's
MCD
$195B
| $75.6M | 0.29% |
337,141
+22,745
| +7% | +$4.86M |
|
79
Nike
NKE
$60.1B
| $75.4M | 0.28% |
567,585
-61,241
| -10% | -$8.51M |
|
80
Microchip Technology
MCHP
$43.1B
| $75.3M | 0.28% |
970,258
-32,628
| -3% | -$2.43M |
|
81
Edwards Lifesciences
EW
$53.6B
| $75M | 0.28% |
896,172
-2,678
| -0.3% | -$226K |
|
|
82
Vanguard Morningstar Growth ETF
VUG
$229B
| $74.5M | 0.28% |
1,739,010
-6,344,040
| -78% | -$271M |
|
|
XYZ
83
Block Inc
XYZ
$47B
| $72.4M | 0.27% |
319,024
-195,857
| -38% | -$45.8M |
|
84
Alibaba
BABA
$300B
| $71.7M | 0.27% |
316,204
+8,445
| +3% | +$2.07M |
|
85
Thermo Fisher Scientific
TMO
$223B
| $70.4M | 0.27% |
154,363
+1,814
| +1% | +$866K |
|
86
Zebra Technologies
ZBRA
$17.9B
| $70M | 0.26% |
144,262
-59,392
| -29% | -$26.5M |
|
87
Blackstone
BX
$110B
| $69.7M | 0.26% |
935,197
+38,724
| +4% | +$2.67M |
|
|
88
iRhythm Holdings
IRTC
$4.13B
| $69.2M | 0.26% |
498,163
+285,555
| +134% | +$51.2M |
|
89
McCormick & Company Non-Voting
MKC
$14.2B
| $69.1M | 0.26% |
774,767
+81,697
| +12% | +$7.27M |
|
90
Rockwell Automation
ROK
$50.1B
| $69M | 0.26% |
260,122
+45,749
| +21% | +$11.7M |
|
91
RingCentral
RNG
$5.25B
| $69M | 0.26% |
231,737
+36,193
| +19% | +$13.3M |
|
92
Align Technology
ALGN
$12.4B
| $68.7M | 0.26% |
126,847
-1,738
| -1% | -$961K |
|
93
Atlassian
TEAM
$39.4B
| $68.3M | 0.26% |
323,950
-764
| -0.2% | -$178K |
|
94
Boeing
BA
$183B
| $67.8M | 0.26% |
266,108
+18,514
| +7% | +$4.12M |
|
95
General Dynamics
GD
$107B
| $67.1M | 0.25% |
369,725
+144
| +0% | +$23.5K |
|
96
Vanguard FTSE All-World ex-US ETF
VEU
$70.5B
| $65.9M | 0.25% |
1,085,828
+154,456
| +17% | +$9.39M |
|
97
Verizon
VZ
$195B
| $65.7M | 0.25% |
1,130,316
-52,780
| -4% | -$2.98M |
|
98
Netflix
NFLX
$309B
| $65.7M | 0.25% |
1,258,640
-32,430
| -3% | -$1.72M |
|
99
PepsiCo
PEP
$189B
| $65.5M | 0.25% |
462,905
-20,389
| -4% | -$2.8M |
|
100
Intuitive Surgical
ISRG
$142B
| $65.3M | 0.25% |
264,966
+3,975
| +2% | +$1M |
|
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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.