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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+9.1%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$19.5B
AUM Growth
+$2.1B
Cap. Flow
+$465M
Cap. Flow %
2.39%
Top 10 Hldgs %
22.3%
Holding
1,847
New
125
Increased
679
Reduced
598
Closed
120

Top Buys

Rank Stock Value
1
ANET icon
Arista Networks
ANET
+$24M
2
DIS icon
Walt Disney
DIS
+$22.5M
3
PYPL icon
PayPal
PYPL
+$21.1M
4
AXP icon
American Express
AXP
+$18.6M
5
NOW icon
ServiceNow
NOW
+$15.5M

Top Sells

Rank Stock Value
1
CELG
Celgene Corp
CELG
+$25M
2
ULTA icon
Ulta Beauty
ULTA
+$21.8M
3
EOG icon
EOG Resources
EOG
+$20.9M
4
ABMD
Abiomed Inc
ABMD
+$16.3M
5
GRUB
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
+$11.2M

Sector Composition

Rank Sector Weight
1 Technology 23.46%
2 Healthcare 17.35%
3 Financials 13.04%
4 Consumer Discretionary 9.94%
5 Industrials 9.53%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
PMD
901
DELISTED
Psychemedics Corporation
PMD
$651K ﹤0.01%
71,200
-1,500
-2% -$13.9K
RIG icon
902
Transocean
RIG
$5.82B
$650K ﹤0.01%
94,438
+3,845
+4% +$19.8K
SLF icon
903
Sun Life Financial
SLF
$45.4B
$645K ﹤0.01%
14,158
– –
IQV icon
904
IQVIA
IQV
$39.3B
$644K ﹤0.01%
4,165
-33
-0.8% -$4.82K
PEG icon
905
Public Service Enterprise Group
PEG
$37.7B
$643K ﹤0.01%
10,889
+117
+1% +$7.09K
PETQ
906
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
$643K ﹤0.01%
25,672
-31,875
-55% -$792K
GRPN icon
907
Groupon
GRPN
$951M
$641K ﹤0.01%
13,418
-8,800
-40% -$488K
IYH icon
908
iShares US Healthcare ETF
IYH
$3.54B
$639K ﹤0.01%
14,820
-1,570
-10% -$63.4K
JEF icon
909
Jefferies Financial Group
JEF
$13.1B
$638K ﹤0.01%
31,207
– –
UYG icon
910
ProShares Ultra Financials
UYG
$847M
$638K ﹤0.01%
11,895
– –
FUTY icon
911
Fidelity MSCI Utilities Index ETF
FUTY
$2.29B
$636K ﹤0.01%
+15,045
New +$626K
MCY icon
912
Mercury Insurance
MCY
$6.07B
$636K ﹤0.01%
13,059
+650
+5% +$32.7K
BWA icon
913
BorgWarner
BWA
$13.9B
$632K ﹤0.01%
16,538
-11,818
-42% -$433K
STE icon
914
Steris
STE
$23.1B
$631K ﹤0.01%
4,139
+2,635
+175% +$386K
BFH icon
915
Bread Financial
BFH
$4.38B
$626K ﹤0.01%
6,994
-2,796
-29% -$247K
TDW icon
916
Tidewater
TDW
$4.12B
$621K ﹤0.01%
32,194
-500
-2% -$7.98K
EXPE icon
917
Expedia Group
EXPE
$37.3B
$620K ﹤0.01%
5,735
-2,702
-32% -$317K
PRMW
918
DELISTED
Primo Water Corporation
PRMW
$613K ﹤0.01%
54,650
+22,490
+70% +$249K
LBRDK icon
919
Liberty Broadband Class C
LBRDK
$5.15B
$612K ﹤0.01%
4,863
+1,608
+49% +$187K
FTA icon
920
First Trust Large Cap Value AlphaDEX Fund
FTA
$1.4B
$611K ﹤0.01%
10,808
-1,847
-15% -$99K
DDOG icon
921
Datadog
DDOG
$83.3B
$608K ﹤0.01%
+16,105
New +$579K
LUV icon
922
Southwest Airlines
LUV
$23B
$604K ﹤0.01%
11,185
-381
-3% -$21.1K
KKR icon
923
KKR & Co
KKR
$92.3B
$601K ﹤0.01%
20,610
+5,407
+36% +$154K
DG icon
924
Dollar General
DG
$27.9B
$598K ﹤0.01%
3,832
+1,678
+78% +$266K
RPG icon
925
Invesco S&P 500 Pure Growth ETF
RPG
$2.09B
$597K ﹤0.01%
23,535
-2,750
-10% -$66.8K
35 36
37
38 39

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William Blair & Company's Q4 2019 Portfolio in Review

As of Q4 2019, William Blair & Company held 1,847 positions worth $19.5B, up 12% from $17.4B the previous quarter. Its ten largest holdings account for 22% of the portfolio.

William Blair & Company's Q4 2019 filing shows 125 new, 679 increased, 598 reduced and 120 closed positions. Its largest new stake was Dynatrace: 165,602 shares worth $4.19M. The largest sale was Celgene Corp, an estimated $25M.

By sector, the portfolio is most concentrated in Technology at 23% of assets, up from 23% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q4 2019 buy was Dynatrace: 165,602 shares worth $4.19M.
  • William Blair & Company added most to Arista Networks in Q4 2019, an estimated $24M increase.
  • William Blair & Company's biggest Q4 2019 reduction was Ulta Beauty, cutting an estimated $21.8M.
  • William Blair & Company fully exited Celgene Corp in Q4 2019, selling an estimated $25M.
  • William Blair & Company's ten largest holdings make up 22% of its $19.5B portfolio in Q4 2019.
  • William Blair & Company opened 125 new positions and closed 120 in Q4 2019.
  • William Blair & Company's portfolio value rose 12% quarter-over-quarter to $19.5B.

Based on William Blair & Company's 13F filing for Q4 2019, filed 13 Feb 2020.