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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+8.27%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$31.9B
AUM Growth
+$2.51B
Cap. Flow
+$830M
Cap. Flow %
2.6%
Top 10 Hldgs %
23.75%
Holding
2,051
New
174
Increased
889
Reduced
606
Closed
88

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$66.8M
2
PODD icon
Insulet
PODD
+$47M
3
XMTR icon
Xometry
XMTR
+$44.1M
4
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$43.7M
5
AON icon
Aon
AON
+$36.1M

Top Sells

Rank Stock Value
1
PYPL icon
PayPal
PYPL
+$73.8M
2
ATVI
Activision Blizzard
ATVI
+$46.9M
3
OSH
Oak Street Health, Inc.
OSH
+$43.6M
4
DIS icon
Walt Disney
DIS
+$34M
5
PGR icon
Progressive
PGR
+$32.6M

Sector Composition

Rank Sector Weight
1 Technology 26.2%
2 Healthcare 19.21%
3 Financials 10.7%
4 Consumer Discretionary 10.6%
5 Industrials 10.38%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
LEG icon
776
Leggett & Platt
LEG
$1.31B
$1.67M 0.01%
40,550
– –
SPLV icon
777
Invesco S&P 500 Low Volatility ETF
SPLV
$7.21B
$1.66M 0.01%
24,185
+15
+0.1% +$966
HRT
778
DELISTED
HireRight Holdings Corporation
HRT
$1.66M 0.01%
+103,745
New +$1.73M
CTSH icon
779
Cognizant
CTSH
$26B
$1.65M 0.01%
18,597
+8,339
+81% +$671K
XIFR
780
XPLR Infrastructure LP
XIFR
$1.08B
$1.65M 0.01%
19,555
+5,966
+44% +$499K
WAL icon
781
Western Alliance Bancorporation
WAL
$8.87B
$1.64M 0.01%
15,263
+7,662
+101% +$862K
ECOM
782
DELISTED
CHANNELADVISOR CORPORATION
ECOM
$1.64M 0.01%
66,462
-1,539
-2% -$39.5K
RPM icon
783
RPM International
RPM
$15B
$1.63M 0.01%
16,161
+896
+6% +$81.5K
APPN icon
784
Appian
APPN
$2.48B
$1.63M 0.01%
24,995
-792
-3% -$65.8K
INSP icon
785
Inspire Medical Systems
INSP
$1.74B
$1.62M 0.01%
7,041
+15
+0.2% +$3.66K
WRK
786
DELISTED
WestRock Company
WRK
$1.61M 0.01%
36,391
-97
-0.3% -$4.57K
BNY
787
Bank of New York Mellon
BNY
$107B
$1.61M 0.01%
27,731
+905
+3% +$52K
SWCH
788
DELISTED
Switch, Inc. Class A Common Stock
SWCH
$1.61M 0.01%
56,218
+46,293
+466% +$1.21M
OTIS icon
789
Otis Worldwide
OTIS
$28.2B
$1.6M 0.01%
18,362
+173
+1% +$14.5K
IXN icon
790
iShares Global Tech ETF
IXN
$8.83B
$1.6M 0.01%
24,787
+1,896
+8% +$116K
XLP icon
791
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.9B
$1.6M 0.01%
20,699
+300
+1% +$21.7K
AZPN
792
DELISTED
ASPEN TECHNOLOGY INC
AZPN
$1.6M 0.01%
10,485
+4,682
+81% +$713K
GSK icon
793
GSK
GSK
$106B
$1.59M 0.01%
28,878
+1,787
+7% +$93K
IVOG icon
794
Vanguard S&P Mid-Cap 400 Growth ETF
IVOG
$1.7B
$1.59M 0.01%
15,004
-340
-2% -$35.4K
BOX icon
795
Box
BOX
$4.6B
$1.57M ﹤0.01%
60,068
+40,768
+211% +$1.05M
EVER icon
796
EverQuote
EVER
$906M
$1.57M ﹤0.01%
99,999
-26,191
-21% -$400K
SIVB
797
DELISTED
SVB Financial Group
SIVB
$1.56M ﹤0.01%
2,308
+45
+2% +$31.7K
IJJ icon
798
iShares S&P Mid-Cap 400 Value ETF
IJJ
$8.97B
$1.56M ﹤0.01%
14,114
+116
+0.8% +$12.6K
LGTY
799
DELISTED
Logility Supply Chain Solutions, Inc. Common Stock
LGTY
$1.56M ﹤0.01%
59,704
-12,642
-17% -$336K
ORI icon
800
Old Republic International
ORI
$10.4B
$1.55M ﹤0.01%
63,248
+2,509
+4% +$62.3K
30 31
32
33 34

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William Blair & Company's Q4 2021 Portfolio in Review

As of Q4 2021, William Blair & Company held 2,051 positions worth $31.9B, up 8.5% from $29.4B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q4 2021 filing shows 174 new, 889 increased, 606 reduced and 88 closed positions. Its largest new stake was Portillo's: 759,814 shares worth $28.5M. The largest sale was PayPal, an estimated $73.8M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 26% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q4 2021 buy was Portillo's: 759,814 shares worth $28.5M.
  • William Blair & Company added most to Amazon in Q4 2021, an estimated $66.8M increase.
  • William Blair & Company's biggest Q4 2021 reduction was PayPal, cutting an estimated $73.8M.
  • William Blair & Company fully exited Asana in Q4 2021, selling an estimated $6.06M.
  • William Blair & Company's ten largest holdings make up 24% of its $31.9B portfolio in Q4 2021.
  • William Blair & Company opened 174 new positions and closed 88 in Q4 2021.
  • William Blair & Company's portfolio value rose 8.5% quarter-over-quarter to $31.9B.

Based on William Blair & Company's 13F filing for Q4 2021, filed 14 Feb 2022.