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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+13.98%
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
$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
AAPL icon
1
Apple
AAPL
$4.99T
$1.37B 5.01%
10,295,152
+211,407
+2% +$25.4M
AMZN icon
2
Amazon
AMZN
$2.46T
$1.01B 3.71%
6,215,220
+118,700
+2% +$18.9M
MSFT icon
3
Microsoft
MSFT
$2.94T
$896M 3.29%
4,030,219
+55,503
+1% +$11.9M
IDXX icon
4
Idexx Laboratories
IDXX
$44.8B
$739M 2.71%
1,478,628
-32,211
-2% -$14.4M
PYPL icon
5
PayPal
PYPL
$50.3B
$576M 2.11%
2,458,424
+38,648
+2% +$8.01M
V icon
6
Visa
V
$707B
$565M 2.07%
2,581,897
+9,126
+0.4% +$1.87M
VEEV icon
7
Veeva Systems
VEEV
$33.8B
$512M 1.88%
1,881,448
-25,883
-1% -$7.25M
MA icon
8
Mastercard
MA
$501B
$423M 1.55%
1,186,112
+6,445
+0.5% +$2.14M
GOOG icon
9
Alphabet (Google) Class C
GOOG
$4.07T
$417M 1.53%
4,761,820
-16,640
-0.3% -$1.4M
ZTS icon
10
Zoetis
ZTS
$32.9B
$416M 1.53%
2,515,780
+24,095
+1% +$3.92M
SBUX icon
11
Starbucks
SBUX
$118B
$410M 1.5%
3,832,618
+177,198
+5% +$16.9M
DXCM icon
12
DexCom
DXCM
$29.3B
$400M 1.47%
4,327,164
+140,576
+3% +$12.6M
DOCU
13
DocuSign
DOCU
$11B
$391M 1.43%
1,758,819
-66,577
-4% -$15M
ADBE icon
14
Adobe
ADBE
$104B
$382M 1.4%
764,708
-7,133
-0.9% -$3.45M
DHR icon
15
Danaher
DHR
$141B
$356M 1.31%
1,808,826
-3,726
-0.2% -$747K
VUG icon
16
Vanguard Growth ETF
VUG
$214B
$341M 1.25%
8,083,050
+102,732
+1% +$4.1M
WDAY icon
17
Workday
WDAY
$41B
$322M 1.18%
1,344,808
+57,543
+4% +$12.9M
FISV
18
Fiserv Inc
FISV
$29.5B
$279M 1.02%
2,453,791
+24,574
+1% +$2.65M
ECL icon
19
Ecolab
ECL
$79.1B
$274M 1.01%
1,268,624
+71,817
+6% +$15M
CRM icon
20
Salesforce
CRM
$153B
$252M 0.93%
1,134,612
+68,100
+6% +$16.6M
CSGP icon
21
CoStar Group
CSGP
$11.9B
$239M 0.88%
2,585,920
+12,240
+0.5% +$1.07M
GOOGL icon
22
Alphabet (Google) Class A
GOOGL
$4.09T
$214M 0.78%
2,442,820
+2,460
+0.1% +$207K
JPM icon
23
JPMorgan Chase
JPM
$931B
$211M 0.77%
1,663,361
+273,824
+20% +$30.6M
SPY icon
24
State Street SPDR S&P 500 ETF Trust
SPY
$777B
$207M 0.76%
553,860
+5,969
+1% +$2.12M
ICE icon
25
Intercontinental Exchange
ICE
$87.1B
$204M 0.75%
1,767,991
+39,305
+2% +$4.08M
1
2 3 4 5

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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.