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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
+13.98%
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
$27.3B
AUM Growth
+$3.7B
Cap. Flow
+$865M
Cap. Flow %
3.17%
Top 10 Hldgs %
25.38%
Holding
1,900
New
178
Increased
749
Reduced
623
Closed
72

Top Buys

Rank Stock Value
1
SPLK
Splunk Inc
SPLK
+$77.8M
2
GD icon
General Dynamics
GD
+$49.6M
3
ROK icon
Rockwell Automation
ROK
+$43.3M
4
LMBS icon
First Trust Exchange-Traded Fund IV First Trust Low Duration Opportunities ETF
LMBS
+$32.3M
5
JPM icon
JPMorgan Chase
JPM
+$30.6M

Top Sells

Rank Stock Value
1
WORK
Slack Technologies, Inc.
WORK
+$24.2M
2
NTRS icon
Northern Trust
NTRS
+$24.1M
3
BKNG icon
Booking.com
BKNG
+$22.5M
4
EXEL icon
Exelixis
EXEL
+$17.5M
5
DOCU
DocuSign
DOCU
+$15M

Sector Composition

Rank Sector Weight
1 Technology 27.82%
2 Healthcare 18.6%
3 Financials 11.15%
4 Consumer Discretionary 10.38%
5 Industrials 8.96%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AGI icon
1151
Alamos Gold
AGI
$13.8B
$401K ﹤0.01%
45,809
-6,552
-13% -$58.2K
HSBC icon
1152
HSBC
HSBC
$358B
$399K ﹤0.01%
15,416
-8,117
-34% -$193K
EQNR icon
1153
Equinor
EQNR
$96.3B
$397K ﹤0.01%
24,189
-9,083
-27% -$137K
QYLD icon
1154
Global X NASDAQ-100 Covered Call ETF
QYLD
$8.29B
$397K ﹤0.01%
17,395
+6,042
+53% +$134K
SPH icon
1155
Suburban Propane Partners
SPH
$1.17B
$396K ﹤0.01%
26,643
+300
+1% +$4.82K
HRTX icon
1156
Heron Therapeutics
HRTX
$63.5M
$392K ﹤0.01%
18,500
– –
STAG icon
1157
STAG Industrial
STAG
$7.12B
$390K ﹤0.01%
+12,465
New +$390K
APO icon
1158
Apollo Global Management
APO
$84.8B
$389K ﹤0.01%
7,950
-1,000
-11% -$44.6K
ABNB icon
1159
Airbnb
ABNB
$111B
$387K ﹤0.01%
+2,635
New +$389K
WIFI
1160
DELISTED
Boingo Wireless, Inc.
WIFI
$387K ﹤0.01%
30,445
-16,285
-35% -$192K
MPT
1161
Medical Properties Trust
MPT
$2.51B
$380K ﹤0.01%
17,439
+6,439
+59% +$125K
WH icon
1162
Wyndham Hotels & Resorts
WH
$5.51B
$380K ﹤0.01%
6,388
+100
+2% +$5.39K
UPLD icon
1163
Upland Software
UPLD
$17.9M
$379K ﹤0.01%
826
– –
RGT
1164
Royce Global Value Trust
RGT
$101M
$377K ﹤0.01%
28,195
– –
TLTD icon
1165
FlexShares Morningstar Developed Markets ex-US Factor Tilt Index Fund
TLTD
$690M
$377K ﹤0.01%
5,705
-23
-0.4% -$1.4K
USHY icon
1166
iShares Broad USD High Yield Corporate Bond ETF
USHY
$29.2B
$376K ﹤0.01%
9,109
+4,617
+103% +$186K
FLIR
1167
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
$375K ﹤0.01%
8,551
-324
-4% -$12.5K
APTV icon
1168
Aptiv
APTV
$10.2B
$374K ﹤0.01%
2,873
+17
+0.6% +$1.89K
PIE icon
1169
Invesco Dorsey Wright Emerging Markets Momentum ETF
PIE
$250M
$372K ﹤0.01%
16,285
+2,225
+16% +$46.5K
SLAB icon
1170
Silicon Laboratories
SLAB
$7.28B
$372K ﹤0.01%
2,925
+500
+21% +$56.3K
AXS icon
1171
AXIS Capital
AXS
$7.3B
$370K ﹤0.01%
7,334
-1,100
-13% -$53.3K
CASY icon
1172
Casey's General Stores
CASY
$31.6B
$369K ﹤0.01%
2,068
+72
+4% +$13.1K
OSBC icon
1173
Old Second Bancorp
OSBC
$1.31B
$369K ﹤0.01%
36,555
-28,194
-44% -$268K
MGPI icon
1174
MGP Ingredients
MGPI
$389M
$368K ﹤0.01%
7,830
+630
+9% +$27.1K
AL
1175
DELISTED
Air Lease Corp
AL
$366K ﹤0.01%
8,235
-28
-0.3% -$1K
45 46
47
48 49

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William Blair & Company's Q4 2020 Portfolio in Review

As of Q4 2020, William Blair & Company held 1,900 positions worth $27.3B, up 16% from $23.6B the previous quarter. Its ten largest holdings account for 25% of the portfolio.

William Blair & Company deployed $865M of net new capital in Q4 2020, opening 178 new positions and adding to 749 existing holdings. Its largest new stake was Seagen Inc. Common Stock: 91,539 shares worth $16M.

By sector, the portfolio is most concentrated in Technology at 28% of assets, up from 27% a quarter earlier, followed by Healthcare and Financials.

On the sell side, the largest reduction was Slack Technologies, Inc., an estimated $24.2M trimmed.

  • William Blair & Company's largest Q4 2020 buy was Seagen Inc. Common Stock: 91,539 shares worth $16M.
  • William Blair & Company added most to Splunk Inc in Q4 2020, an estimated $77.8M increase.
  • William Blair & Company's biggest Q4 2020 reduction was Slack Technologies, Inc., cutting an estimated $24.2M.
  • William Blair & Company fully exited Dunkin' Brands Group, Inc. in Q4 2020, selling an estimated $12.1M.
  • William Blair & Company's ten largest holdings make up 25% of its $27.3B portfolio in Q4 2020.
  • William Blair & Company opened 178 new positions and closed 72 in Q4 2020.
  • William Blair & Company's portfolio value rose 16% quarter-over-quarter to $27.3B.

Based on William Blair & Company's 13F filing for Q4 2020, filed 9 Feb 2021.