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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
HUBS icon
951
HubSpot
HUBS
$12B
$525K ﹤0.01%
1,795
+528
+42% +$138K
SIVB
952
DELISTED
SVB Financial Group
SIVB
$525K ﹤0.01%
2,183
-356
-14% -$83.8K
MGEE icon
953
MGE Energy Inc
MGEE
$3.06B
$523K ﹤0.01%
8,353
+3,078
+58% +$199K
VRNS icon
954
Varonis Systems
VRNS
$5.26B
$523K ﹤0.01%
13,590
-435
-3% -$16.2K
BLMN icon
955
Bloomin' Brands
BLMN
$924M
$519K ﹤0.01%
33,999
-267
-0.8% -$3.46K
UAL icon
956
United Airlines
UAL
$41B
$519K ﹤0.01%
14,937
+1,698
+13% +$58.7K
SIVR icon
957
abrdn Physical Silver Shares ETF
SIVR
$4.47B
$518K ﹤0.01%
23,031
-42,369
-65% -$1M
XRAY icon
958
Dentsply Sirona
XRAY
$2.31B
$512K ﹤0.01%
11,697
-395
-3% -$17.5K
EB
959
DELISTED
Eventbrite
EB
$511K ﹤0.01%
47,126
-32,050
-40% -$319K
MCY icon
960
Mercury Insurance
MCY
$5.81B
$510K ﹤0.01%
12,337
-722
-6% -$31K
PENN icon
961
PENN Entertainment
PENN
$2.53B
$510K ﹤0.01%
7,016
-2,568
-27% -$126K
HHH icon
962
Howard Hughes
HHH
$4.04B
$506K ﹤0.01%
9,221
+1,753
+23% +$93.6K
AIG icon
963
American International
AIG
$39.8B
$505K ﹤0.01%
18,327
+1,484
+9% +$44.2K
CIGI icon
964
Colliers International
CIGI
$5.41B
$505K ﹤0.01%
7,566
-1,084
-13% -$65.9K
HCAT icon
965
Health Catalyst
HCAT
$132M
$502K ﹤0.01%
13,704
-7,966
-37% -$271K
KRE icon
966
State Street SPDR S&P Regional Banking ETF
KRE
$4.67B
$501K ﹤0.01%
14,049
+255
+2% +$9.61K
AFIB
967
DELISTED
Acutus Medical Inc
AFIB
$498K ﹤0.01%
+16,725
New +$508K
KBH icon
968
KB Home
KBH
$3.45B
$496K ﹤0.01%
12,928
– –
VRP icon
969
Invesco Variable Rate Preferred ETF
VRP
$3.01B
$490K ﹤0.01%
19,913
+11,049
+125% +$271K
SONY icon
970
Sony
SONY
$138B
$489K ﹤0.01%
+31,870
New +$496K
PEG icon
971
Public Service Enterprise Group
PEG
$37.8B
$488K ﹤0.01%
8,884
+46
+0.5% +$2.44K
MSCI icon
972
MSCI
MSCI
$41.8B
$486K ﹤0.01%
1,362
-4
-0.3% -$1.45K
OSBC icon
973
Old Second Bancorp
OSBC
$1.31B
$485K ﹤0.01%
64,749
+10,739
+20% +$85.9K
THFF icon
974
First Financial Corp
THFF
$975M
$485K ﹤0.01%
15,454
– –
FLOT icon
975
iShares Floating Rate Bond ETF
FLOT
$10.5B
$484K ﹤0.01%
9,549
+3,281
+52% +$166K
37 38
39
40 41

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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.