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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
FHLC icon
1676
Fidelity MSCI Health Care Index ETF
FHLC
$3.42B
$19K ﹤0.01%
325
+10
+3% +$552
IHF icon
1677
iShares US Healthcare Providers ETF
IHF
$1.27B
$19K ﹤0.01%
415
+375
+938% +$16.6K
NFRA icon
1678
FlexShares STOXX Global Broad Infrastructure Index Fund
NFRA
$3.03B
$19K ﹤0.01%
349
-326
-48% -$17K
TENX icon
1679
Tenax Therapeutics
TENX
$64.4M
$19K ﹤0.01%
6
– –
USEQ
1680
DELISTED
Invesco Russell 1000 Enhanced Equal Weight ETF
USEQ
$18K ﹤0.01%
580
– –
ERUS
1681
DELISTED
iShares MSCI Russia ETF
ERUS
$18K ﹤0.01%
487
– –
AOA icon
1682
iShares Core 80/20 Aggressive Allocation ETF
AOA
$3.28B
$17K ﹤0.01%
267
+2
+0.8% +$122
XAR icon
1683
State Street SPDR S&P Aerospace & Defense ETF
XAR
$6.64B
$17K ﹤0.01%
152
-16
-10% -$1.62K
ACES icon
1684
ALPS Clean Energy ETF
ACES
$124M
$16K ﹤0.01%
+200
New +$13.1K
PSR icon
1685
Invesco Active US Real Estate Fund
PSR
$59.2M
$16K ﹤0.01%
+186
New +$15.7K
IPAC icon
1686
iShares Core MSCI Pacific ETF
IPAC
$2.78B
$15K ﹤0.01%
+237
New +$14.3K
RGLS
1687
DELISTED
Regulus Therapeutics
RGLS
$15K ﹤0.01%
1,120
– –
RZG icon
1688
Invesco S&P SmallCap 600 Pure Growth ETF
RZG
$138M
$15K ﹤0.01%
330
– –
XTL icon
1689
State Street SPDR S&P Telecom ETF
XTL
$558M
$15K ﹤0.01%
179
– –
CHIQ icon
1690
Global X MSCI China Consumer Discretionary ETF
CHIQ
$123M
$14K ﹤0.01%
396
– –
EWD icon
1691
iShares MSCI Sweden ETF
EWD
$582M
$14K ﹤0.01%
350
– –
XMPT icon
1692
VanEck CEF Muni Income ETF
XMPT
$219M
$14K ﹤0.01%
474
– –
CUT icon
1693
Invesco MSCI Global Timber ETF
CUT
$33.4M
$13K ﹤0.01%
400
– –
EZA icon
1694
iShares MSCI South Africa ETF
EZA
$567M
$13K ﹤0.01%
296
– –
GSIE icon
1695
Goldman Sachs ActiveBeta International Equity ETF
GSIE
$6.14B
$13K ﹤0.01%
+406
New +$12.2K
PGJ icon
1696
Invesco Golden Dragon China ETF
PGJ
$95.1M
$13K ﹤0.01%
200
– –
ISCV icon
1697
iShares Morningstar Small-Cap Value ETF
ISCV
$706M
$12K ﹤0.01%
261
-45
-15% -$1.89K
LQDH icon
1698
iShares Interest Rate Hedged Corporate Bond ETF
LQDH
$540M
$12K ﹤0.01%
+127
New +$11.9K
MXI icon
1699
iShares Global Materials ETF
MXI
$361M
$12K ﹤0.01%
148
– –
SUPN icon
1700
Supernus Pharmaceuticals
SUPN
$2.78B
$12K ﹤0.01%
475
+50
+12% +$1.08K
66 67
68
69 70

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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.