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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
+12.53%
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
$23.6B
AUM Growth
+$2.6B
Cap. Flow
+$316M
Cap. Flow %
1.34%
Top 10 Hldgs %
26.84%
Holding
1,800
New
126
Increased
679
Reduced
652
Closed
80

Top Buys

Rank Stock Value
1
QDEL icon
QuidelOrtho
QDEL
+$40.3M
2
TDOC icon
Teladoc Health
TDOC
+$32.5M
3
CTAS icon
Cintas
CTAS
+$25.5M
4
ECL icon
Ecolab
ECL
+$25.4M
5
FTV icon
Fortive
FTV
+$24M

Top Sells

Rank Stock Value
1
GS icon
Goldman Sachs
GS
+$46.7M
2
GWRE icon
Guidewire Software
GWRE
+$38.9M
3
ANET icon
Arista Networks
ANET
+$31.4M
4
V icon
Visa
V
+$25.9M
5
PFNX
Pfenex Inc.
PFNX
+$25.4M

Sector Composition

Rank Sector Weight
1 Technology 27.37%
2 Healthcare 19.68%
3 Financials 10.88%
4 Consumer Discretionary 10.56%
5 Industrials 8.4%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
XLNX
326
DELISTED
Xilinx Inc
XLNX
$7.24M 0.03%
69,470
-7,116
-9% -$731K
CNI icon
327
Canadian National Railway
CNI
$76.4B
$7.22M 0.03%
67,852
+1,596
+2% +$160K
EPAM icon
328
EPAM Systems
EPAM
$5.17B
$7.16M 0.03%
22,143
+487
+2% +$145K
RH icon
329
RH
RH
$3.41B
$7.13M 0.03%
18,645
+1,305
+8% +$412K
BYND icon
330
Beyond Meat
BYND
$214M
$7.09M 0.03%
42,714
+19,523
+84% +$2.64M
IWO icon
331
iShares Russell 2000 Growth ETF
IWO
$15B
$7.05M 0.03%
31,822
-1,294
-4% -$283K
RP
332
DELISTED
RealPage, Inc.
RP
$6.99M 0.03%
121,257
+12,776
+12% +$790K
LYV icon
333
Live Nation Entertainment
LYV
$43.2B
$6.99M 0.03%
129,698
+18,685
+17% +$963K
NSC icon
334
Norfolk Southern
NSC
$75.3B
$6.98M 0.03%
32,620
-518
-2% -$104K
CBOE icon
335
Cboe Global Markets
CBOE
$30.4B
$6.96M 0.03%
79,342
-5,625
-7% -$506K
GDDY icon
336
GoDaddy
GDDY
$11.6B
$6.95M 0.03%
91,417
+36,118
+65% +$2.72M
AVLR
337
DELISTED
Avalara, Inc.
AVLR
$6.9M 0.03%
54,151
+25,127
+87% +$3.19M
BSV icon
338
Vanguard Short-Term Bond ETF
BSV
$45.6B
$6.85M 0.03%
82,491
+8,365
+11% +$695K
SRPT icon
339
Sarepta Therapeutics
SRPT
$1.94B
$6.68M 0.03%
47,569
+2,746
+6% +$417K
MXL icon
340
MaxLinear
MXL
$6.74B
$6.63M 0.03%
285,145
-13,184
-4% -$325K
ATR icon
341
AptarGroup
ATR
$8.47B
$6.62M 0.03%
58,475
-1,417
-2% -$166K
SDY icon
342
State Street SPDR S&P Dividend ETF
SDY
$22.1B
$6.6M 0.03%
71,451
-133,650
-65% -$12.6M
RSP icon
343
Invesco S&P 500 Equal Weight ETF
RSP
$99.5B
$6.59M 0.03%
61,003
+1,426
+2% +$154K
VGT icon
344
Vanguard Information Technology ETF
VGT
$149B
$6.45M 0.03%
165,584
+18,336
+12% +$690K
RPD icon
345
Rapid7
RPD
$827M
$6.44M 0.03%
105,088
-480
-0.5% -$28.5K
IJH icon
346
iShares Core S&P Mid-Cap ETF
IJH
$128B
$6.4M 0.03%
172,680
-4,960
-3% -$185K
U icon
347
Unity
U
$19.6B
$6.36M 0.03%
+72,858
New +$6.14M
CHD icon
348
Church & Dwight Co
CHD
$24B
$6.28M 0.03%
67,004
+1,199
+2% +$109K
IJK icon
349
iShares S&P Mid-Cap 400 Growth ETF
IJK
$11.2B
$6.23M 0.03%
104,216
+1,660
+2% +$98.8K
IUSG icon
350
iShares Core S&P US Growth ETF
IUSG
$33.7B
$6.23M 0.03%
77,886
-4,808
-6% -$377K
12 13
14
15 16

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William Blair & Company's Q3 2020 Portfolio in Review

As of Q3 2020, William Blair & Company held 1,800 positions worth $23.6B, up 12% from $21B the previous quarter. Its ten largest holdings account for 27% of the portfolio.

William Blair & Company's Q3 2020 filing shows 126 new, 679 increased, 652 reduced and 80 closed positions. Its largest new stake was Unity: 72,858 shares worth $6.36M. The largest sale was Goldman Sachs, an estimated $46.7M.

By sector, the portfolio is most concentrated in Technology at 27% of assets, down from 27% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q3 2020 buy was Unity: 72,858 shares worth $6.36M.
  • William Blair & Company added most to QuidelOrtho in Q3 2020, an estimated $40.3M increase.
  • William Blair & Company's biggest Q3 2020 reduction was Goldman Sachs, cutting an estimated $46.7M.
  • William Blair & Company fully exited Pfenex Inc. in Q3 2020, selling an estimated $25.4M.
  • William Blair & Company's ten largest holdings make up 27% of its $23.6B portfolio in Q3 2020.
  • William Blair & Company opened 126 new positions and closed 80 in Q3 2020.
  • William Blair & Company's portfolio value rose 12% quarter-over-quarter to $23.6B.

Based on William Blair & Company's 13F filing for Q3 2020, filed 6 Nov 2020.