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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
GBT
851
DELISTED
Global Blood Therapeutics, Inc.
GBT
$991K ﹤0.01%
22,872
+10,542
+85% +$520K
PWR icon
852
Quanta Services
PWR
$101B
$985K ﹤0.01%
13,684
-2,825
-17% -$186K
LH icon
853
Labcorp
LH
$26.2B
$983K ﹤0.01%
5,620
-115
-2% -$19.9K
IPG
854
DELISTED
Interpublic Group of Companies
IPG
$981K ﹤0.01%
41,692
+1,938
+5% +$40.6K
F icon
855
Ford
F
$55.4B
$980K ﹤0.01%
111,502
-1,154
-1% -$9.66K
PPLI
856
People Inc
PPLI
$3.01B
$980K ﹤0.01%
9,480
-701
-7% -$53.7K
PRF icon
857
Invesco FTSE RAFI US 1000 ETF
PRF
$10.1B
$980K ﹤0.01%
36,795
+1,165
+3% +$29K
HELE icon
858
Helen of Troy
HELE
$699M
$978K ﹤0.01%
4,403
+320
+8% +$65.9K
O icon
859
Realty Income
O
$59.6B
$972K ﹤0.01%
16,135
+826
+5% +$48.8K
GCO icon
860
Genesco
GCO
$394M
$957K ﹤0.01%
31,814
-12
-0% -$307
HDB icon
861
HDFC Bank
HDB
$119B
$957K ﹤0.01%
26,490
-9,058
-25% -$289K
BWA icon
862
BorgWarner
BWA
$13.8B
$947K ﹤0.01%
27,837
-2,565
-8% -$87K
SAP icon
863
SAP
SAP
$242B
$945K ﹤0.01%
7,244
-3,305
-31% -$427K
FDN icon
864
First Trust Dow Jones Internet Index Fund ETF
FDN
$5.45B
$943K ﹤0.01%
4,444
+896
+25% +$181K
APAM icon
865
Artisan Partners
APAM
$3.03B
$942K ﹤0.01%
+18,708
New +$850K
IWY icon
866
iShares Russell Top 200 Growth ETF
IWY
$16.7B
$942K ﹤0.01%
7,082
+5,378
+316% +$678K
ZROZ icon
867
PIMCO 25+ Year Zero Coupon US Treasury Index Exchange-Traded Fund
ZROZ
$1.31B
$938K ﹤0.01%
5,738
+3,278
+133% +$540K
MTX icon
868
Minerals Technologies
MTX
$2.26B
$931K ﹤0.01%
14,980
+220
+1% +$13.1K
SUSL icon
869
iShares ESG MSCI USA Leaders ETF
SUSL
$1.22B
$928K ﹤0.01%
14,284
+672
+5% +$41.3K
MRVI icon
870
Maravai LifeSciences
MRVI
$861M
$927K ﹤0.01%
+33,054
New +$920K
SHM icon
871
State Street SPDR Nuveen ICE Short Term Municipal Bond ETF
SHM
$3.48B
$927K ﹤0.01%
18,610
+1,826
+11% +$90.9K
SHV icon
872
iShares 0-1 Year Treasury Bond ETF
SHV
$20.6B
$925K ﹤0.01%
8,372
-224
-3% -$24.8K
EXP icon
873
Eagle Materials
EXP
$6.41B
$924K ﹤0.01%
9,118
-2,500
-22% -$232K
AMLP icon
874
Alerian MLP ETF
AMLP
$13.1B
$923K ﹤0.01%
35,983
-15,083
-30% -$362K
CIBR icon
875
First Trust NASDAQ Cybersecurity ETF
CIBR
$16B
$920K ﹤0.01%
20,725
+326
+2% +$12.4K
33 34
35
36 37

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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.