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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
XES icon
1776
State Street SPDR S&P Oil & Gas Equipment & Services ETF
XES
$390M
$1K ﹤0.01%
23
– –
PDCE
1777
DELISTED
PDC Energy, Inc.
PDCE
$1K ﹤0.01%
70
– –
FNI
1778
DELISTED
First Trust Chindia ETF
FNI
$1K ﹤0.01%
12
– –
AIG.WS
1779
DELISTED
American International Group, Inc.
AIG.WS
$1K ﹤0.01%
4,771
-4,501
-49% -$2.15K
AIEQ icon
1780
Amplify AI Powered Equity ETF
AIEQ
$124M
$0 ﹤0.01%
+10
New +$331
ASMB icon
1781
Assembly Biosciences
ASMB
$536M
– –
-1,000
Closed -$197K
BAC.PRL icon
1782
Bank of America Series L
BAC.PRL
$4.02B
– –
-186
Closed -$277K
BBRE icon
1783
JPMorgan BetaBuilders MSCI US REIT ETF
BBRE
$1.25B
$0 ﹤0.01%
+5
New +$383
CASS icon
1784
Cass Information Systems
CASS
$742M
– –
-6,175
Closed -$248K
DBX icon
1785
Dropbox
DBX
$7.31B
– –
-42,550
Closed -$820K
DXD icon
1786
ProShares UltraShort Dow 30
DXD
$42.7M
$0 ﹤0.01%
5
– –
EB
1787
DELISTED
Eventbrite
EB
– –
-47,126
Closed -$511K
EFA icon
1788
iShares MSCI EAFE ETF
EFA
$80.2B
$0 ﹤0.01%
765,034
+57,920
+8% +$3.96M
ENFR icon
1789
Alerian Energy Infrastructure ETF
ENFR
$521M
– –
-160
Closed -$2K
EQX icon
1790
Equinox Gold
EQX
$13.5B
– –
-11,741
Closed -$137K
EMBJ
1791
Embraer S.A. ADS
EMBJ
$13.2B
– –
-11,032
Closed -$49K
FE icon
1792
FirstEnergy
FE
$27.2B
– –
-7,523
Closed -$216K
FUL icon
1793
H.B. Fuller
FUL
$3.24B
– –
-5,203
Closed -$238K
GME icon
1794
GameStop
GME
$8.32B
– –
-42,428
Closed -$108K
GNMA icon
1795
iShares GNMA Bond ETF
GNMA
$432M
– –
-82
Closed -$4K
GUSH icon
1796
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$247M
– –
-4,800
Closed -$26K
HII icon
1797
Huntington Ingalls Industries
HII
$12.9B
– –
-1,856
Closed -$261K
HYD icon
1798
VanEck High Yield Muni ETF
HYD
$4.4B
– –
-137
Closed -$8K
INOD icon
1799
Innodata
INOD
$2.01B
– –
-12,000
Closed -$37K
IRIX icon
1800
IRIDEX
IRIX
$15.1M
– –
-11,928
Closed -$23K
70 71
72
73 74

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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.