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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
SSO icon
1626
ProShares Ultra S&P500
SSO
$8.39B
$36K ﹤0.01%
1,568
– –
EWL icon
1627
iShares MSCI Switzerland ETF
EWL
$2.22B
$35K ﹤0.01%
785
– –
SAN icon
1628
Banco Santander
SAN
$211B
$35K ﹤0.01%
11,345
-841
-7% -$2.13K
SCHC icon
1629
Schwab International Small-Cap Equity ETF
SCHC
$5.67B
$35K ﹤0.01%
940
+297
+46% +$10.4K
DVYE icon
1630
iShares Emerging Markets Dividend ETF
DVYE
$1.21B
$34K ﹤0.01%
+925
New +$31K
IVOV icon
1631
Vanguard S&P Mid-Cap 400 Value ETF
IVOV
$1.37B
$33K ﹤0.01%
502
– –
RZV icon
1632
Invesco S&P SmallCap 600 Pure Value ETF
RZV
$305M
$33K ﹤0.01%
500
-100
-17% -$6.04K
DFJ icon
1633
WisdomTree Japan SmallCap Dividend Fund
DFJ
$402M
$32K ﹤0.01%
438
– –
EWQ icon
1634
iShares MSCI France ETF
EWQ
$333M
$32K ﹤0.01%
963
– –
XTN icon
1635
State Street SPDR S&P Transportation ETF
XTN
$392M
$32K ﹤0.01%
450
– –
EDIV icon
1636
State Street SPDR S&P Emerging Markets Dividend ETF
EDIV
$1.22B
$31K ﹤0.01%
+1,117
New +$29.1K
FPEI icon
1637
First Trust Institutional Preferred Securities and Income ETF
FPEI
$1.94B
$31K ﹤0.01%
+1,538
New +$30.6K
AOM icon
1638
iShares Core Moderate Allocation ETF
AOM
$1.77B
$30K ﹤0.01%
700
– –
IBDT icon
1639
iShares iBonds Dec 2028 Term Corporate ETF
IBDT
$4.07B
$30K ﹤0.01%
+1,000
New +$29.3K
MJ icon
1640
Amplify Alternative Harvest ETF
MJ
$111M
$30K ﹤0.01%
174
– –
SOCL icon
1641
Global X Social Media ETF
SOCL
$90.3M
$30K ﹤0.01%
485
– –
XHB icon
1642
State Street SPDR S&P Homebuilders ETF
XHB
$1.58B
$30K ﹤0.01%
527
+1
+0.2% +$57
FWONA icon
1643
Liberty Media Series A
FWONA
$23.7B
$29K ﹤0.01%
799
– –
IGM icon
1644
iShares Expanded Tech Sector ETF
IGM
$10.8B
$29K ﹤0.01%
492
– –
BCIC
1645
BCP Investment Corp
BCIC
$95.6M
$29K ﹤0.01%
+1,533
New +$23.1K
EPP icon
1646
iShares MSCI Pacific ex Japan ETF
EPP
$2.26B
$28K ﹤0.01%
592
-126
-18% -$5.62K
PBE icon
1647
Invesco Biotechnology & Genome ETF
PBE
$358M
$28K ﹤0.01%
400
– –
PCRX icon
1648
Pacira BioSciences
PCRX
$945M
$28K ﹤0.01%
470
-7
-1% -$410
SPTM icon
1649
State Street SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$14.1B
$28K ﹤0.01%
610
+503
+470% +$21.9K
HEZU icon
1650
iShares Currency Hedged MSCI Eurozone ETF
HEZU
$590M
$27K ﹤0.01%
880
– –
64 65
66
67 68

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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.