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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
DSI icon
476
iShares MSCI KLD 400 Social ETF
DSI
$5.56B
$3.34M 0.01%
52,224
+28,470
+120% +$1.8M
WCN
477
Waste Connections
WCN
$41.5B
$3.31M 0.01%
31,845
-13
-0% -$1.3K
HYG icon
478
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.9B
$3.29M 0.01%
39,252
-2,878
-7% -$242K
IGSB icon
479
iShares 1-5 Year Investment Grade Corporate Bond ETF
IGSB
$23.4B
$3.28M 0.01%
59,772
+28,556
+91% +$1.57M
PODD icon
480
Insulet
PODD
$10B
$3.27M 0.01%
13,822
-1,124
-8% -$237K
ZBH icon
481
Zimmer Biomet
ZBH
$18.8B
$3.26M 0.01%
24,683
+1,427
+6% +$186K
KLAC icon
482
KLA
KLAC
$278B
$3.26M 0.01%
168,310
+139,510
+484% +$2.76M
IHI icon
483
iShares US Medical Devices ETF
IHI
$3.47B
$3.24M 0.01%
64,896
+1,542
+2% +$74.7K
USPH icon
484
US Physical Therapy
USPH
$1.23B
$3.23M 0.01%
37,219
+1,300
+4% +$112K
III icon
485
Information Services Group
III
$242M
$3.2M 0.01%
1,518,394
-4,066
-0.3% -$8.61K
COF icon
486
Capital One
COF
$136B
$3.17M 0.01%
44,116
+9,224
+26% +$617K
IBB icon
487
iShares Biotechnology ETF
IBB
$9.83B
$3.16M 0.01%
23,347
+4,486
+24% +$609K
HYMB icon
488
State Street SPDR Nuveen ICE High Yield Municipal Bond ETF
HYMB
$3.37B
$3.15M 0.01%
110,710
-1,248
-1% -$35.6K
CLVT icon
489
Clarivate
CLVT
$1.19B
$3.15M 0.01%
101,530
-2,148
-2% -$58.1K
RHI icon
490
Robert Half
RHI
$4.26B
$3.13M 0.01%
59,104
-13,671
-19% -$728K
INGN icon
491
Inogen
INGN
$154M
$3.12M 0.01%
107,483
+1,069
+1% +$33.6K
HUBB icon
492
Hubbell
HUBB
$26.8B
$3.1M 0.01%
22,623
-303
-1% -$41.7K
LUV icon
493
Southwest Airlines
LUV
$22.2B
$3.09M 0.01%
82,422
+3,016
+4% +$107K
PARA
494
DELISTED
Paramount Global Class B
PARA
$3.05M 0.01%
108,930
+21,359
+24% +$572K
ADSK icon
495
Autodesk
ADSK
$51.4B
$3.05M 0.01%
13,187
+347
+3% +$82.5K
MEDP icon
496
Medpace
MEDP
$16.4B
$3.01M 0.01%
26,930
+7,616
+39% +$881K
CHRW icon
497
C.H. Robinson
CHRW
$17.4B
$3M 0.01%
29,389
-1,744
-6% -$164K
VMW
498
DELISTED
VMware, Inc
VMW
$3M 0.01%
20,899
-9,893
-32% -$1.41M
PLAN
499
DELISTED
Anaplan, Inc.
PLAN
$2.95M 0.01%
47,142
-10,690
-18% -$551K
BIIB icon
500
Biogen
BIIB
$31.1B
$2.95M 0.01%
10,384
+1,038
+11% +$290K
18 19
20
21 22

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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.