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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
VIRT icon
1076
Virtu Financial
VIRT
$5.05B
$510K ﹤0.01%
20,252
-23,018
-53% -$533K
BBAX icon
1077
JPMorgan BetaBuilders Developed Asia Pacific-ex Japan ETF
BBAX
$6.78B
$509K ﹤0.01%
+9,404
New +$471K
VXUS icon
1078
Vanguard Total International Stock ETF
VXUS
$164B
$505K ﹤0.01%
8,401
+82
+1% +$4.61K
HL icon
1079
Hecla Mining
HL
$11.9B
$504K ﹤0.01%
77,834
+3
+0% +$16
SITM icon
1080
SiTime
SITM
$20.7B
$498K ﹤0.01%
4,449
+200
+5% +$18.9K
VRP icon
1081
Invesco Variable Rate Preferred ETF
VRP
$3.01B
$498K ﹤0.01%
19,192
-721
-4% -$18.3K
MD icon
1082
Pediatrix Medical
MD
$2.14B
$496K ﹤0.01%
+20,228
New +$380K
SIRI icon
1083
SiriusXM
SIRI
$9.43B
$496K ﹤0.01%
7,791
-262
-3% -$16.1K
FUTY icon
1084
Fidelity MSCI Utilities Index ETF
FUTY
$2.31B
$495K ﹤0.01%
12,210
-415
-3% -$16.9K
ZUMZ icon
1085
Zumiez
ZUMZ
$319M
$494K ﹤0.01%
+13,425
New +$452K
EVRG icon
1086
Evergy
EVRG
$19.3B
$489K ﹤0.01%
8,810
+1,666
+23% +$91.4K
EMB icon
1087
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$15B
$486K ﹤0.01%
4,194
+399
+11% +$45.2K
IYF icon
1088
iShares US Financials ETF
IYF
$4.44B
$484K ﹤0.01%
7,254
-5,396
-43% -$333K
USD icon
1089
ProShares Ultra Semiconductors
USD
$2.99B
$484K ﹤0.01%
74,800
– –
LNC icon
1090
Lincoln National
LNC
$8.67B
$483K ﹤0.01%
9,607
+609
+7% +$25.9K
ROBO icon
1091
ROBO Global Robotics & Automation Index ETF
ROBO
$2.13B
$479K ﹤0.01%
7,862
+994
+14% +$53.8K
ONB icon
1092
Old National Bancorp
ONB
$10.4B
$478K ﹤0.01%
28,894
-2,414
-8% -$37K
VFH icon
1093
Vanguard Financials ETF
VFH
$14B
$477K ﹤0.01%
6,543
-19,988
-75% -$1.32M
BEPC icon
1094
Brookfield Renewable
BEPC
$6.66B
$471K ﹤0.01%
8,087
+1,349
+20% +$64.9K
LSXMK
1095
DELISTED
Liberty Media Corporation Series C Liberty SiriusXM Common Stock
LSXMK
$471K ﹤0.01%
13,971
+119
+0.9% +$3.63K
BE icon
1096
Bloom Energy
BE
$69.6B
$470K ﹤0.01%
16,416
-4,600
-22% -$98.2K
WAL icon
1097
Western Alliance Bancorporation
WAL
$8.92B
$468K ﹤0.01%
+7,809
New +$380K
COOP
1098
DELISTED
Mr. Cooper
COOP
$465K ﹤0.01%
15,000
– –
FTDR icon
1099
Frontdoor
FTDR
$5.83B
$465K ﹤0.01%
9,253
+364
+4% +$16.6K
ICLR icon
1100
Icon
ICLR
$12.9B
$464K ﹤0.01%
2,378
+58
+3% +$11.3K
42 43
44
45 46

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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.