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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
HCAT icon
1001
Health Catalyst
HCAT
$132M
$652K ﹤0.01%
14,984
+1,280
+9% +$47.2K
NDAQ icon
1002
Nasdaq
NDAQ
$54.6B
$652K ﹤0.01%
14,736
+1,776
+14% +$75.2K
ARW icon
1003
Arrow Electronics
ARW
$10.6B
$650K ﹤0.01%
6,683
-730
-10% -$64.6K
FCN icon
1004
FTI Consulting
FCN
$4.24B
$645K ﹤0.01%
5,775
-8,220
-59% -$885K
FNV icon
1005
Franco-Nevada
FNV
$44.7B
$644K ﹤0.01%
5,135
-6
-0.1% -$810
TSN icon
1006
Tyson Foods
TSN
$19.8B
$642K ﹤0.01%
9,970
+2,106
+27% +$131K
WBT
1007
DELISTED
Welbilt, Inc.
WBT
$642K ﹤0.01%
48,641
+2,408
+5% +$21.6K
PNQI icon
1008
Invesco NASDAQ Internet ETF
PNQI
$544M
$639K ﹤0.01%
14,000
– –
UAL icon
1009
United Airlines
UAL
$41B
$638K ﹤0.01%
14,742
-195
-1% -$7.89K
MANT
1010
DELISTED
Mantech International Corp
MANT
$634K ﹤0.01%
+7,127
New +$539K
SLF icon
1011
Sun Life Financial
SLF
$44.8B
$633K ﹤0.01%
14,232
-117
-0.8% -$5.07K
GOCO
1012
DELISTED
GoHealth
GOCO
$632K ﹤0.01%
3,085
+1,581
+105% +$294K
IEX icon
1013
IDEX
IEX
$17.6B
$631K ﹤0.01%
3,168
+113
+4% +$21.5K
EXG icon
1014
Eaton Vance Tax-Managed Global Diversified Equity Income Fund
EXG
$3.09B
$630K ﹤0.01%
71,788
-1,656
-2% -$13.4K
WDC icon
1015
Western Digital
WDC
$168B
$629K ﹤0.01%
15,032
+5,070
+51% +$168K
ADEA icon
1016
Adeia
ADEA
$3.16B
$628K ﹤0.01%
113,638
-37,547
-25% -$163K
ICVT icon
1017
iShares Convertible Bond ETF
ICVT
$7.64B
$628K ﹤0.01%
6,502
+4,261
+190% +$377K
VAR
1018
DELISTED
Varian Medical Systems, Inc.
VAR
$628K ﹤0.01%
3,589
+90
+3% +$15.6K
PENN icon
1019
PENN Entertainment
PENN
$2.53B
$627K ﹤0.01%
7,257
+241
+3% +$17.2K
MSCI icon
1020
MSCI
MSCI
$41.8B
$626K ﹤0.01%
1,402
+40
+3% +$15.7K
TXG icon
1021
10x Genomics
TXG
$7.58B
$622K ﹤0.01%
+4,395
New +$638K
FTCS icon
1022
First Trust Capital Strength ETF
FTCS
$8.02B
$619K ﹤0.01%
9,172
– –
RWX icon
1023
State Street SPDR Dow Jones International Real Estate ETF
RWX
$267M
$613K ﹤0.01%
17,980
-266
-1% -$8.44K
THW
1024
abrdn World Healthcare Fund
THW
$560M
$612K ﹤0.01%
38,681
– –
WOLF icon
1025
Wolfspeed
WOLF
$1.64B
$612K ﹤0.01%
5,777
-1,483
-20% -$119K
39 40
41
42 43

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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.