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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
IRDM icon
326
Iridium Communications
IRDM
$5.13B
$6.87M 0.04%
278,968
-39,740
-12% -$952K
AIRG icon
327
Airgain
AIRG
$72.5M
$6.87M 0.04%
642,524
-44,546
-6% -$468K
BIDU icon
328
Baidu
BIDU
$37.7B
$6.85M 0.04%
54,190
-5,256
-9% -$598K
SJM icon
329
J.M. Smucker
SJM
$12.7B
$6.84M 0.04%
65,660
-6,585
-9% -$697K
BMRN icon
330
BioMarin Pharmaceuticals
BMRN
$11.6B
$6.78M 0.03%
80,169
+2,678
+3% +$202K
CNI icon
331
Canadian National Railway
CNI
$77.1B
$6.73M 0.03%
74,359
+50,621
+213% +$4.55M
ADPT icon
332
Adaptive Biotechnologies
ADPT
$3.91B
$6.7M 0.03%
223,970
+107,958
+93% +$3.1M
IWS icon
333
iShares Russell Mid-Cap Value ETF
IWS
$15.9B
$6.58M 0.03%
69,479
-1,621
-2% -$148K
BN icon
334
Brookfield
BN
$109B
$6.56M 0.03%
244,056
+30,905
+14% +$616K
HEFA icon
335
iShares Currency Hedged MSCI EAFE ETF
HEFA
$7.63B
$6.55M 0.03%
214,782
-961
-0.4% -$29.3K
SBAC icon
336
SBA Communications
SBAC
$18.9B
$6.48M 0.03%
26,905
+159
+0.6% +$37.7K
FDX icon
337
FedEx
FDX
$73.5B
$6.45M 0.03%
42,669
+5,002
+13% +$771K
RDFN
338
DELISTED
Redfin
RDFN
$6.43M 0.03%
304,253
-3,242
-1% -$62.1K
TSLA icon
339
Tesla
TSLA
$1.27T
$6.43M 0.03%
230,475
-4,365
-2% -$94.7K
RWO icon
340
State Street SPDR Dow Jones Global Real Estate ETF
RWO
$1.31B
$6.43M 0.03%
124,739
+2,364
+2% +$123K
NOC icon
341
Northrop Grumman
NOC
$79.2B
$6.4M 0.03%
18,609
+1,070
+6% +$376K
CHD icon
342
Church & Dwight Co
CHD
$24.6B
$6.38M 0.03%
90,764
-6,505
-7% -$462K
IJR icon
343
iShares Core S&P Small-Cap ETF
IJR
$112B
$6.38M 0.03%
76,024
+4,057
+6% +$326K
CAI
344
DELISTED
CAI International, Inc.
CAI
$6.36M 0.03%
219,564
+1,653
+0.8% +$40.1K
NSC icon
345
Norfolk Southern
NSC
$76.8B
$6.29M 0.03%
32,409
-400
-1% -$75K
RDS.A
346
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
$6.26M 0.03%
106,122
-2,680
-2% -$156K
GSK icon
347
GSK
GSK
$103B
$6.21M 0.03%
105,724
-4,368
-4% -$243K
NKTR icon
348
Nektar Therapeutics
NKTR
$2.47B
$6.19M 0.03%
19,113
+1
+0% +$290
IJK icon
349
iShares S&P Mid-Cap 400 Growth ETF
IJK
$11B
$6.18M 0.03%
103,824
+1,144
+1% +$65.6K
BURL icon
350
Burlington
BURL
$23.2B
$6.15M 0.03%
26,975
+9,078
+51% +$1.9M
12 13
14
15 16

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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.