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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
RCL icon
901
Royal Caribbean
RCL
$82.9B
$868K ﹤0.01%
11,624
+164
+1% +$11.4K
CCJ icon
902
Cameco
CCJ
$42.6B
$867K ﹤0.01%
64,690
-836
-1% -$8.93K
ECPG icon
903
Encore Capital Group
ECPG
$2.15B
$866K ﹤0.01%
22,242
-5,810
-21% -$211K
XPO icon
904
XPO
XPO
$24.7B
$863K ﹤0.01%
20,934
-433
-2% -$15.7K
SP
905
DELISTED
SP Plus Corporation
SP
$858K ﹤0.01%
+29,759
New +$731K
IONS icon
906
Ionis Pharmaceuticals
IONS
$9.28B
$857K ﹤0.01%
15,164
+45
+0.3% +$2.24K
KSU
907
DELISTED
Kansas City Southern
KSU
$857K ﹤0.01%
4,197
-253
-6% -$47.5K
LMNX
908
DELISTED
Luminex Corp
LMNX
$855K ﹤0.01%
37,000
– –
XLB icon
909
State Street Materials Select Sector SPDR ETF
XLB
$8.57B
$854K ﹤0.01%
23,592
-1,012
-4% -$34.6K
IEV icon
910
iShares Europe ETF
IEV
$1.7B
$853K ﹤0.01%
17,793
-50
-0.3% -$2.25K
XME icon
911
State Street SPDR S&P Metals & Mining ETF
XME
$4.46B
$853K ﹤0.01%
25,510
+5,300
+26% +$150K
WLKP icon
912
Westlake Chemical Partners
WLKP
$764M
$852K ﹤0.01%
35,750
– –
ARES icon
913
Ares Management
ARES
$33.7B
$849K ﹤0.01%
18,036
-1,267
-7% -$57.3K
DRI icon
914
Darden Restaurants
DRI
$25.4B
$849K ﹤0.01%
7,128
-268
-4% -$28.7K
SUNS
915
DELISTED
SLR Senior Investment Corp. Common Stock
SUNS
$844K ﹤0.01%
58,364
– –
DDOG icon
916
Datadog
DDOG
$90.6B
$832K ﹤0.01%
8,447
-33
-0.4% -$3.29K
KKR icon
917
KKR & Co
KKR
$103B
$832K ﹤0.01%
20,537
+9,103
+80% +$344K
SRCL
918
DELISTED
Stericycle Inc
SRCL
$831K ﹤0.01%
11,984
-7,037
-37% -$481K
PZA icon
919
Invesco National AMT-Free Municipal Bond ETF
PZA
$4.27B
$830K ﹤0.01%
30,628
-1,259
-4% -$33.7K
VKTX icon
920
Viking Therapeutics
VKTX
$3.84B
$827K ﹤0.01%
146,826
+37,425
+34% +$227K
QTEC icon
921
First Trust NASDAQ-100 Technology Index Fund
QTEC
$4.92B
$826K ﹤0.01%
5,986
– –
QTWO icon
922
Q2 Holdings
QTWO
$4.13B
$823K ﹤0.01%
6,505
– –
EDIT icon
923
Editas Medicine
EDIT
$432M
$820K ﹤0.01%
11,700
– –
BBEU icon
924
JPMorgan BetaBuilders Europe ETF
BBEU
$9.53B
$818K ﹤0.01%
+15,652
New +$768K
SAIC icon
925
Saic
SAIC
$5.35B
$816K ﹤0.01%
+8,626
New +$758K
35 36
37
38 39

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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.