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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
+512.03%
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
POOL icon
101
Pool Corp
POOL
$6.75B
$43.3M 0.22%
203,837
+5,730
+3% +$1.18M
WAB icon
102
Wabtec
WAB
$49.1B
$43.3M 0.22%
556,165
+158,344
+40% +$11.7M
ATVI
103
DELISTED
Activision Blizzard
ATVI
$43.3M 0.22%
727,971
+36,758
+5% +$2.03M
ALGN icon
104
Align Technology
ALGN
$12.1B
$43.2M 0.22%
154,845
-20,151
-12% -$5.02M
INFO
105
DELISTED
IHS Markit Ltd. Common Shares
INFO
$43.2M 0.22%
573,358
+63,324
+12% +$4.51M
MCHP icon
106
Microchip Technology
MCHP
$40.3B
$43M 0.22%
820,362
+212,152
+35% +$10.2M
TMO icon
107
Thermo Fisher Scientific
TMO
$213B
$42.1M 0.22%
129,710
-3,468
-3% -$1.05M
MTN icon
108
Vail Resorts
MTN
$5.32B
$42.1M 0.22%
175,665
+2,815
+2% +$666K
NOW icon
109
ServiceNow
NOW
$115B
$42M 0.22%
743,720
+294,370
+66% +$15.5M
NKE icon
110
Nike
NKE
$61.9B
$40M 0.21%
394,652
+59,285
+18% +$5.59M
IBM icon
111
IBM
IBM
$211B
$39.9M 0.21%
311,480
+12,669
+4% +$1.65M
IEMG icon
112
iShares Core MSCI Emerging Markets ETF
IEMG
$152B
$39.8M 0.2%
740,334
-8,046
-1% -$415K
INTC icon
113
Intel
INTC
$455B
$39.4M 0.2%
658,516
-23,103
-3% -$1.29M
P
114
Everpure Inc
P
$25.7B
$39M 0.2%
2,277,809
-434,181
-16% -$7.68M
BX icon
115
Blackstone
BX
$102B
$38.6M 0.2%
689,960
+60,677
+10% +$3.15M
NFLX icon
116
Netflix
NFLX
$299B
$38.1M 0.2%
1,176,370
-72,450
-6% -$2.15M
SPLK
117
DELISTED
Splunk Inc
SPLK
$37.4M 0.19%
250,005
+4,013
+2% +$527K
MMM icon
118
3M
MMM
$90.9B
$37.4M 0.19%
253,468
-12,838
-5% -$1.8M
IWD icon
119
iShares Russell 1000 Value ETF
IWD
$82.6B
$36.6M 0.19%
268,073
+26,795
+11% +$3.53M
ZBRA icon
120
Zebra Technologies
ZBRA
$14B
$36.4M 0.19%
142,668
+1,334
+0.9% +$312K
VWO icon
121
Vanguard FTSE Emerging Markets ETF
VWO
$121B
$36.4M 0.19%
818,886
-63,672
-7% -$2.7M
LOW icon
122
Lowe's Companies
LOW
$117B
$36.2M 0.19%
302,252
+12,724
+4% +$1.45M
WBA
123
DELISTED
Walgreens Boots Alliance
WBA
$35.4M 0.18%
599,993
-15,578
-3% -$898K
IWV icon
124
iShares Russell 3000 ETF
IWV
$19.9B
$34.8M 0.18%
184,498
+3,813
+2% +$687K
CPAY icon
125
Corpay
CPAY
$25B
$34.5M 0.18%
119,922
+1,343
+1% +$396K
3 4
5
6 7

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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.