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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
EV
801
DELISTED
Eaton Vance Corp.
EV
$1.16M ﹤0.01%
+17,026
New +$1.06M
IBDN
802
DELISTED
iShares iBonds Dec 2022 Term Corporate ETF
IBDN
$1.16M ﹤0.01%
45,262
+3,902
+9% +$99.8K
AVB icon
803
AvalonBay Communities
AVB
$26.3B
$1.16M ﹤0.01%
7,207
+248
+4% +$39.4K
IBDM
804
DELISTED
iShares iBonds Dec 2021 Term Corporate ETF
IBDM
$1.16M ﹤0.01%
46,377
+5,402
+13% +$135K
AVY icon
805
Avery Dennison
AVY
$13.6B
$1.15M ﹤0.01%
7,430
+242
+3% +$35K
ACCD
806
DELISTED
Accolade Inc
ACCD
$1.15M ﹤0.01%
+26,457
New +$1.17M
BECN
807
DELISTED
Beacon Roofing Supply, Inc.
BECN
$1.13M ﹤0.01%
+28,160
New +$1.03M
TLND
808
DELISTED
Talend S.A. American Depositary Shares
TLND
$1.13M ﹤0.01%
29,359
+4,873
+20% +$192K
HSIC icon
809
Henry Schein
HSIC
$10B
$1.13M ﹤0.01%
16,833
-1,039
-6% -$67K
JCI icon
810
Johnson Controls International
JCI
$91.7B
$1.12M ﹤0.01%
24,117
-4,328
-15% -$192K
BOOT icon
811
Boot Barn
BOOT
$4.92B
$1.12M ﹤0.01%
25,885
+17,560
+211% +$661K
ESI icon
812
Element Solutions
ESI
$9.51B
$1.12M ﹤0.01%
63,004
-19,371
-24% -$268K
TDY icon
813
Teledyne Technologies
TDY
$31.2B
$1.11M ﹤0.01%
2,835
+324
+13% +$116K
ASML icon
814
ASML
ASML
$710B
$1.1M ﹤0.01%
2,262
-204
-8% -$85.8K
IXUS icon
815
iShares Core MSCI Total International Stock ETF
IXUS
$60.8B
$1.09M ﹤0.01%
16,291
+5,656
+53% +$355K
BSX icon
816
Boston Scientific
BSX
$74.9B
$1.09M ﹤0.01%
30,417
-9,941
-25% -$358K
LNT icon
817
Alliant Energy
LNT
$18.2B
$1.09M ﹤0.01%
21,178
+2,345
+12% +$126K
CCK icon
818
Crown Holdings
CCK
$12.9B
$1.09M ﹤0.01%
10,862
-59
-0.5% -$5.42K
RDS.A
819
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
$1.08M ﹤0.01%
30,684
-13,932
-31% -$435K
LBRDK icon
820
Liberty Broadband Class C
LBRDK
$5.29B
$1.07M ﹤0.01%
6,789
+1,817
+37% +$276K
CFG icon
821
Citizens Financial Group
CFG
$31.2B
$1.07M ﹤0.01%
30,026
+83
+0.3% +$2.6K
IVZ icon
822
Invesco
IVZ
$14.3B
$1.07M ﹤0.01%
61,617
-785
-1% -$12.1K
URTH icon
823
iShares MSCI World ETF
URTH
$8.4B
$1.07M ﹤0.01%
9,529
+1,713
+22% +$182K
GMED icon
824
Globus Medical
GMED
$11.5B
$1.06M ﹤0.01%
16,328
+1,066
+7% +$61.3K
IGV icon
825
iShares Expanded Tech-Software Sector ETF
IGV
$15.2B
$1.06M ﹤0.01%
14,970
+4,220
+39% +$280K
31 32
33
34 35

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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.