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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
VYMI icon
451
Vanguard International High Dividend Yield ETF
VYMI
$21.3B
$4.63M 0.02%
76,234
-115
-0.2% -$6.52K
MRCC
452
DELISTED
Monroe Capital Corp
MRCC
$4.58M 0.02%
570,621
-37,152
-6% -$286K
TMX
453
DELISTED
Terminix Global Holdings, Inc.
TMX
$4.58M 0.02%
+89,746
New +$4.33M
ETSY icon
454
Etsy
ETSY
$7.26B
$4.55M 0.02%
25,567
+1,912
+8% +$288K
MRSH
455
Marsh
MRSH
$90.9B
$4.54M 0.02%
38,816
+5,081
+15% +$577K
NKTR icon
456
Nektar Therapeutics
NKTR
$2.56B
$4.52M 0.02%
17,712
-616
-3% -$159K
VTIP icon
457
Vanguard Short-Term Inflation-Protected Securities Index Fund
VTIP
$19.8B
$4.5M 0.02%
88,019
+1,145
+1% +$58.3K
TTE icon
458
TotalEnergies
TTE
$191B
$4.48M 0.02%
106,963
+9,308
+10% +$359K
RWO icon
459
State Street SPDR Dow Jones Global Real Estate ETF
RWO
$1.3B
$4.48M 0.02%
100,784
+3,393
+3% +$143K
BBY icon
460
Best Buy
BBY
$17.8B
$4.44M 0.02%
44,530
+3,315
+8% +$371K
SPGI icon
461
S&P Global
SPGI
$123B
$4.43M 0.02%
13,492
-259
-2% -$87.4K
TMUS icon
462
T-Mobile US
TMUS
$193B
$4.41M 0.02%
32,697
+7,093
+28% +$876K
BFAM icon
463
Bright Horizons
BFAM
$3.79B
$4.4M 0.02%
25,414
-1,375
-5% -$225K
COF icon
464
Capital One
COF
$137B
$4.35M 0.02%
44,036
-80
-0.2% -$6.8K
KLAC icon
465
KLA
KLAC
$274B
$4.35M 0.02%
168,130
-180
-0.1% -$4.2K
III icon
466
Information Services Group
III
$250M
$4.34M 0.02%
1,323,601
-194,793
-13% -$509K
ABB
467
DELISTED
ABB Ltd
ABB
$4.33M 0.02%
155,003
-3,300
-2% -$88K
VNQI icon
468
Vanguard Global ex-US Real Estate ETF
VNQI
$3.53B
$4.33M 0.02%
79,762
-7,208
-8% -$372K
TRIL
469
DELISTED
Trillium Therapeutics Inc.
TRIL
$4.28M 0.02%
291,187
-47,583
-14% -$686K
BDSI
470
DELISTED
BioDelivery Sciences International, Inc.
BDSI
$4.28M 0.02%
1,019,177
+44,644
+5% +$172K
ODFL icon
471
Old Dominion Freight Line
ODFL
$44.8B
$4.25M 0.02%
43,592
-1,828
-4% -$182K
APPN icon
472
Appian
APPN
$2.51B
$4.16M 0.02%
25,674
-7,409
-22% -$830K
CDW icon
473
CDW
CDW
$17.3B
$4.15M 0.02%
31,521
+674
+2% +$88.2K
LYFT icon
474
Lyft
LYFT
$6.3B
$4.07M 0.01%
82,887
+74,503
+889% +$2.71M
DSI icon
475
iShares MSCI KLD 400 Social ETF
DSI
$5.57B
$4.05M 0.01%
56,576
+4,352
+8% +$295K
17 18
19
20 21

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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.