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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
GOGO icon
676
Gogo Inc
GOGO
$382M
$1.81M 0.01%
188,485
+774
+0.4% +$7.67K
HEI.A icon
677
HEICO Corp Class A
HEI.A
$38.1B
$1.81M 0.01%
15,503
+230
+2% +$25K
SNA icon
678
Snap-on
SNA
$20.9B
$1.81M 0.01%
10,599
-65
-0.6% -$10.9K
PPL
679
PPL Corp
PPL
$26.8B
$1.81M 0.01%
64,245
+23,168
+56% +$658K
JAMF
680
DELISTED
Jamf
JAMF
$1.8M 0.01%
60,308
+5,248
+10% +$173K
VDC icon
681
Vanguard Consumer Staples ETF
VDC
$8.02B
$1.8M 0.01%
10,334
+941
+10% +$160K
EBAY icon
682
eBay
EBAY
$46.1B
$1.78M 0.01%
35,482
-952
-3% -$48.6K
CHL
683
DELISTED
China Mobile Limited
CHL
$1.78M 0.01%
62,214
-60,351
-49% -$1.87M
EMN icon
684
Eastman Chemical
EMN
$8.37B
$1.77M 0.01%
17,674
+10,648
+152% +$987K
NSSC icon
685
Napco Security Technologies
NSSC
$1.38B
$1.75M 0.01%
133,898
+6,658
+5% +$89.7K
SPEM icon
686
State Street SPDR Portfolio Emerging Markets ETF
SPEM
$17.7B
$1.75M 0.01%
41,576
-3,400
-8% -$135K
ETR icon
687
Entergy
ETR
$49.9B
$1.75M 0.01%
35,050
+30,502
+671% +$1.61M
ASAN icon
688
Asana
ASAN
$2.07B
$1.75M 0.01%
+59,185
New +$1.51M
NUAN
689
DELISTED
Nuance Communications, Inc.
NUAN
$1.74M 0.01%
39,351
+130
+0.3% +$4.93K
DLTH icon
690
Duluth Holdings
DLTH
$152M
$1.73M 0.01%
163,988
-45,550
-22% -$621K
MSI icon
691
Motorola Solutions
MSI
$76.9B
$1.73M 0.01%
10,148
+628
+7% +$105K
EA
692
DELISTED
Electronic Arts
EA
$1.72M 0.01%
11,945
+1,186
+11% +$153K
PHYS icon
693
Sprott Physical Gold
PHYS
$15.8B
$1.71M 0.01%
113,272
+119
+0.1% +$1.77K
SUMO
694
DELISTED
Sumo Logic, Inc. Common Stock
SUMO
$1.7M 0.01%
+59,561
New +$1.4M
STE icon
695
Steris
STE
$22.9B
$1.7M 0.01%
8,970
+2,439
+37% +$455K
ARWR icon
696
Arrowhead Research
ARWR
$12.3B
$1.7M 0.01%
22,140
-1,150
-5% -$73.5K
GPC icon
697
Genuine Parts
GPC
$18.5B
$1.68M 0.01%
16,748
-2,865
-15% -$280K
G icon
698
Genpact
G
$5.68B
$1.68M 0.01%
40,588
-1,211
-3% -$47.9K
NICE icon
699
Nice
NICE
$5.82B
$1.67M 0.01%
5,898
-21
-0.4% -$5.11K
PLAN
700
DELISTED
Anaplan, Inc.
PLAN
$1.66M 0.01%
23,152
-23,990
-51% -$1.56M
26 27
28
29 30

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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.