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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
JXI icon
1701
iShares Global Utilities ETF
JXI
$307M
$11K ﹤0.01%
190
-151
-44% -$8.99K
CYB
1702
DELISTED
WisdomTree Chinese Yuan Strategy Fund
CYB
$11K ﹤0.01%
400
– –
DIG icon
1703
ProShares Ultra Energy
DIG
$83.3M
$10K ﹤0.01%
1,144
– –
EBND icon
1704
State Street SPDR Bloomberg Emerging Markets Local Bond ETF
EBND
$2.27B
$10K ﹤0.01%
370
– –
ECH icon
1705
iShares MSCI Chile ETF
ECH
$1.03B
$10K ﹤0.01%
341
+22
+7% +$587
ELD icon
1706
WisdomTree Emerging Markets Local Debt Fund
ELD
$143M
$10K ﹤0.01%
296
+1
+0.3% +$33
GXC icon
1707
State Street SPDR S&P China ETF
GXC
$474M
$10K ﹤0.01%
+75
New +$9.52K
OXY.WS icon
1708
Occidental Petroleum Corp Warrants
OXY.WS
$34.4B
$10K ﹤0.01%
1,423
-52
-4% -$236
SIL icon
1709
Global X Silver Miners ETF NEW
SIL
$4.89B
$10K ﹤0.01%
220
-640
-74% -$28K
SPSM icon
1710
State Street SPDR Portfolio S&P 600 Small Cap ETF
SPSM
$17.5B
$10K ﹤0.01%
281
– –
UPRO icon
1711
ProShares UltraPro S&P 500
UPRO
$5.74B
$10K ﹤0.01%
250
– –
VLUE icon
1712
iShares MSCI USA Value Factor ETF
VLUE
$9.59B
$10K ﹤0.01%
110
+100
+1,000% +$8.14K
WTPI
1713
WisdomTree Equity Premium Income Fund
WTPI
$503M
$10K ﹤0.01%
344
– –
AAWW
1714
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
$10K ﹤0.01%
+177
New +$10.4K
SCHH icon
1715
Schwab US REIT ETF
SCHH
$11.3B
$9K ﹤0.01%
500
-4,574
-90% -$84.6K
SLVP icon
1716
iShares MSCI Global Silver and Metals Miners ETF
SLVP
$976M
$9K ﹤0.01%
552
+13
+2% +$210
USLB
1717
DELISTED
Invesco Russell 1000 Low Beta Equal Weight ETF
USLB
$9K ﹤0.01%
250
– –
ANGL icon
1718
VanEck Fallen Angel High Yield Bond ETF
ANGL
$3.11B
$8K ﹤0.01%
236
– –
BATRA icon
1719
Atlanta Braves Holdings Series A
BATRA
$3.63B
$8K ﹤0.01%
305
– –
IYT icon
1720
iShares US Transportation ETF
IYT
$2.27B
$8K ﹤0.01%
152
– –
DLS icon
1721
WisdomTree International SmallCap Dividend Fund
DLS
$1.08B
$7K ﹤0.01%
106
-800
-88% -$50.9K
FXU icon
1722
First Trust Utilities AlphaDEX Fund
FXU
$827M
$7K ﹤0.01%
261
– –
IGE icon
1723
iShares North American Natural Resources ETF
IGE
$786M
$7K ﹤0.01%
283
– –
KIE icon
1724
State Street SPDR S&P Insurance ETF
KIE
$676M
$7K ﹤0.01%
200
-11
-5% -$347
OIH icon
1725
VanEck Oil Services ETF
OIH
$1.96B
$7K ﹤0.01%
45
– –
67 68
69
70 71

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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.