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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
+13.98%
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
$27.3B
AUM Growth
+$3.7B
Cap. Flow
+$865M
Cap. Flow %
3.17%
Top 10 Hldgs %
25.38%
Holding
1,900
New
178
Increased
749
Reduced
623
Closed
72

Top Buys

Rank Stock Value
1
SPLK
Splunk Inc
SPLK
+$77.8M
2
GD icon
General Dynamics
GD
+$49.6M
3
ROK icon
Rockwell Automation
ROK
+$43.3M
4
LMBS icon
First Trust Exchange-Traded Fund IV First Trust Low Duration Opportunities ETF
LMBS
+$32.3M
5
JPM icon
JPMorgan Chase
JPM
+$30.6M

Top Sells

Rank Stock Value
1
WORK
Slack Technologies, Inc.
WORK
+$24.2M
2
NTRS icon
Northern Trust
NTRS
+$24.1M
3
BKNG icon
Booking.com
BKNG
+$22.5M
4
EXEL icon
Exelixis
EXEL
+$17.5M
5
DOCU
DocuSign
DOCU
+$15M

Sector Composition

Rank Sector Weight
1 Technology 27.82%
2 Healthcare 18.6%
3 Financials 11.15%
4 Consumer Discretionary 10.38%
5 Industrials 8.96%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BRK.B icon
76
Berkshire Hathaway Class B
BRK.B
$1.09T
$83.1M 0.3%
358,431
+12,449
+4% +$2.74M
EW icon
77
Edwards Lifesciences
EW
$53.6B
$82M 0.3%
898,850
+16,425
+2% +$1.36M
KRNT icon
78
Kornit Digital
KRNT
$817M
$80M 0.29%
898,019
-103,438
-10% -$7.95M
TREX icon
79
Trex
TREX
$5.05B
$79.1M 0.29%
945,305
+18,671
+2% +$1.43M
ZBRA icon
80
Zebra Technologies
ZBRA
$17.9B
$78.3M 0.29%
203,654
+20,475
+11% +$6.89M
TEAM icon
81
Atlassian
TEAM
$39.4B
$75.9M 0.28%
324,714
+1,279
+0.4% +$270K
NVDA icon
82
NVIDIA
NVDA
$5.43T
$75.8M 0.28%
5,805,600
+595,080
+11% +$7.97M
TSLA icon
83
Tesla
TSLA
$1.29T
$75.1M 0.28%
319,329
+58,059
+22% +$9.91M
RNG icon
84
RingCentral
RNG
$5.25B
$74.1M 0.27%
195,544
+22,339
+13% +$6.95M
PEP icon
85
PepsiCo
PEP
$189B
$71.7M 0.26%
483,294
+48,307
+11% +$6.87M
BABA icon
86
Alibaba
BABA
$300B
$71.6M 0.26%
307,759
+16,613
+6% +$4.61M
ISRG icon
87
Intuitive Surgical
ISRG
$142B
$71.2M 0.26%
260,991
-549
-0.2% -$136K
TMO icon
88
Thermo Fisher Scientific
TMO
$223B
$71.1M 0.26%
152,549
+12,135
+9% +$5.69M
LIN icon
89
Linde
LIN
$221B
$70M 0.26%
265,621
-17,048
-6% -$4.18M
NFLX icon
90
Netflix
NFLX
$309B
$69.8M 0.26%
1,291,070
+37,130
+3% +$1.88M
VZ icon
91
Verizon
VZ
$195B
$69.5M 0.25%
1,183,096
+72,208
+7% +$4.29M
MCHP icon
92
Microchip Technology
MCHP
$43.1B
$69.3M 0.25%
1,002,886
+5,270
+0.5% +$328K
ALGN icon
93
Align Technology
ALGN
$12.4B
$68.7M 0.25%
128,585
+4,280
+3% +$1.92M
MCD icon
94
McDonald's
MCD
$195B
$67.5M 0.25%
314,396
+6,866
+2% +$1.49M
ROKU icon
95
Roku
ROKU
$22.5B
$67.5M 0.25%
203,165
+21,516
+12% +$5.64M
MKC icon
96
McCormick & Company Non-Voting
MKC
$14.2B
$66.3M 0.24%
693,070
+27,190
+4% +$2.57M
MRCY icon
97
Mercury Systems
MRCY
$6.7B
$65.5M 0.24%
744,235
+67,351
+10% +$5.12M
ROL icon
98
Rollins
ROL
$17.6B
$61.7M 0.23%
1,578,499
-41,795
-3% -$1.62M
YETI icon
99
Yeti Holdings
YETI
$3.85B
$60.9M 0.22%
889,482
+10,618
+1% +$628K
MDB icon
100
MongoDB
MDB
$35.2B
$60.7M 0.22%
169,056
+1,016
+0.6% +$284K
2 3
4
5 6

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William Blair & Company's Q4 2020 Portfolio in Review

As of Q4 2020, William Blair & Company held 1,900 positions worth $27.3B, up 16% from $23.6B the previous quarter. Its ten largest holdings account for 25% of the portfolio.

William Blair & Company deployed $865M of net new capital in Q4 2020, opening 178 new positions and adding to 749 existing holdings. Its largest new stake was Seagen Inc. Common Stock: 91,539 shares worth $16M.

By sector, the portfolio is most concentrated in Technology at 28% of assets, up from 27% a quarter earlier, followed by Healthcare and Financials.

On the sell side, the largest reduction was Slack Technologies, Inc., an estimated $24.2M trimmed.

  • William Blair & Company's largest Q4 2020 buy was Seagen Inc. Common Stock: 91,539 shares worth $16M.
  • William Blair & Company added most to Splunk Inc in Q4 2020, an estimated $77.8M increase.
  • William Blair & Company's biggest Q4 2020 reduction was Slack Technologies, Inc., cutting an estimated $24.2M.
  • William Blair & Company fully exited Dunkin' Brands Group, Inc. in Q4 2020, selling an estimated $12.1M.
  • William Blair & Company's ten largest holdings make up 25% of its $27.3B portfolio in Q4 2020.
  • William Blair & Company opened 178 new positions and closed 72 in Q4 2020.
  • William Blair & Company's portfolio value rose 16% quarter-over-quarter to $27.3B.

Based on William Blair & Company's 13F filing for Q4 2020, filed 9 Feb 2021.