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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
SPTS icon
1476
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.11B
$154K ﹤0.01%
5,000
– –
TACO
1477
DELISTED
Del Taco Restaurants, Inc. Common Stock
TACO
$154K ﹤0.01%
17,000
– –
Z icon
1478
Zillow
Z
$7.48B
$151K ﹤0.01%
+1,167
New +$129K
INN
1479
Summit Hotel Properties
INN
$655M
$150K ﹤0.01%
16,644
-2,150
-11% -$15.9K
RWR icon
1480
State Street SPDR Dow Jones REIT ETF
RWR
$1.87B
$148K ﹤0.01%
1,711
-122
-7% -$10.2K
INDA icon
1481
iShares MSCI India ETF
INDA
$6.58B
$147K ﹤0.01%
3,650
– –
TDW icon
1482
Tidewater
TDW
$4.56B
$147K ﹤0.01%
17,006
-1,000
-6% -$7.94K
MTUM icon
1483
iShares MSCI USA Momentum Factor ETF
MTUM
$26B
$146K ﹤0.01%
907
+233
+35% +$35.7K
PWB icon
1484
Invesco Large Cap Growth ETF
PWB
$2.43B
$146K ﹤0.01%
2,157
+2,063
+2,195% +$133K
UA icon
1485
Under Armour Class C
UA
$2.2B
$146K ﹤0.01%
9,816
+1,302
+15% +$17.4K
ING icon
1486
ING
ING
$102B
$145K ﹤0.01%
15,319
-76
-0.5% -$652
ETHO icon
1487
Amplify Etho Climate Leadership US ETF
ETHO
$195M
$142K ﹤0.01%
2,680
+790
+42% +$38.6K
SHE icon
1488
State Street SPDR MSCI USA Gender Diversity ETF
SHE
$337M
$142K ﹤0.01%
1,580
+1
+0.1% +$83
GLUU
1489
DELISTED
Glu Mobile Inc.
GLUU
$142K ﹤0.01%
15,750
+5,000
+47% +$43.1K
HYS icon
1490
PIMCO 0-5 Year High Yield Corporate Bond Index Exchange-Traded Fund
HYS
$1.77B
$141K ﹤0.01%
1,436
+189
+15% +$18.2K
ITM icon
1491
VanEck Intermediate Muni ETF
ITM
$2.13B
$139K ﹤0.01%
2,662
-1,463
-35% -$75.3K
CWI icon
1492
State Street SPDR MSCI ACWI ex-US ETF
CWI
$2.87B
$138K ﹤0.01%
4,990
+13
+0.3% +$337
ICSH icon
1493
iShares Ultra Short Duration Bond Active ETF
ICSH
$8.4B
$137K ﹤0.01%
2,714
– –
GSJY icon
1494
Goldman Sachs ActiveBeta Japan Equity ETF
GSJY
$88.7M
$134K ﹤0.01%
+3,609
New +$126K
RPV icon
1495
Invesco S&P 500 Pure Value ETF
RPV
$1.73B
$134K ﹤0.01%
2,180
-452
-17% -$25.5K
GRID
1496
First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund
GRID
$12.3B
$133K ﹤0.01%
1,638
+176
+12% +$12.7K
BXMT icon
1497
Blackstone Mortgage Trust
BXMT
$2.41B
$129K ﹤0.01%
4,675
-1,065
-19% -$26.9K
PVLA
1498
Palvella Therapeutics
PVLA
$2.23B
$125K ﹤0.01%
+625
New +$130K
PMD
1499
DELISTED
Psychemedics Corporation
PMD
$125K ﹤0.01%
24,500
-3,650
-13% -$15.8K
SCHA icon
1500
Schwab U.S Small- Cap ETF
SCHA
$23.3B
$124K ﹤0.01%
5,588
-7,964
-59% -$159K
58 59
60
61 62

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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.