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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
UI icon
1501
Ubiquiti
UI
$34.3B
$232K ﹤0.01%
755
– –
AWR icon
1502
American States Water
AWR
$3.46B
$231K ﹤0.01%
+2,230
New +$210K
OOMA icon
1503
Ooma
OOMA
$604M
$230K ﹤0.01%
11,252
– –
VYX icon
1504
NCR Voyix
VYX
$1.14B
$230K ﹤0.01%
9,333
-40
-0.4% -$1.01K
SPIP icon
1505
State Street SPDR Portfolio TIPS ETF
SPIP
$1B
$229K ﹤0.01%
7,258
+3,250
+81% +$102K
DNLI icon
1506
Denali Therapeutics
DNLI
$3.97B
$227K ﹤0.01%
5,100
– –
MNST icon
1507
Monster Beverage
MNST
$88.5B
$227K ﹤0.01%
4,720
-20,082
-81% -$893K
ATO icon
1508
Atmos Energy
ATO
$28.8B
$226K ﹤0.01%
2,155
-167
-7% -$15.8K
EPR icon
1509
EPR Properties
EPR
$4.77B
$226K ﹤0.01%
+4,758
New +$236K
ENV
1510
DELISTED
ENVESTNET, INC.
ENV
$226K ﹤0.01%
2,854
-618
-18% -$50.3K
CARG icon
1511
CarGurus
CARG
$3.47B
$225K ﹤0.01%
6,684
– –
OUST icon
1512
Ouster
OUST
$2.92B
$225K ﹤0.01%
+4,330
New +$281K
SKY icon
1513
Champion Homes
SKY
$5.14B
$225K ﹤0.01%
2,854
-630
-18% -$45.5K
SNSR icon
1514
Global X Internet of Things ETF
SNSR
$223M
$225K ﹤0.01%
5,737
– –
SON icon
1515
Sonoco
SON
$5.74B
$225K ﹤0.01%
3,892
-819
-17% -$48.9K
BAB icon
1516
Invesco Taxable Municipal Bond ETF
BAB
$1.02B
$224K ﹤0.01%
6,786
– –
KDP icon
1517
Keurig Dr Pepper
KDP
$40.8B
$224K ﹤0.01%
+6,077
New +$214K
SIMO icon
1518
Silicon Motion
SIMO
$8.68B
$224K ﹤0.01%
+2,358
New +$178K
FDUS icon
1519
Fidus Investment
FDUS
$772M
$223K ﹤0.01%
12,421
– –
WBS icon
1520
Webster Financial
WBS
$12.8B
$223K ﹤0.01%
3,995
-78
-2% -$4.39K
ATOM icon
1521
Atomera
ATOM
$214M
$222K ﹤0.01%
11,025
+1,025
+10% +$24.1K
RYAAY icon
1522
Ryanair
RYAAY
$31.3B
$221K ﹤0.01%
5,395
-50
-0.9% -$2.18K
CE icon
1523
Celanese
CE
$4.82B
$219K ﹤0.01%
1,301
-271
-17% -$44.1K
FUBO icon
1524
FuboTV Inc
FUBO
$273M
$219K ﹤0.01%
1,176
-5
-0.4% -$1.41K
BSM icon
1525
Black Stone Minerals
BSM
$3B
$218K ﹤0.01%
21,133
+2,500
+13% +$28.9K
59 60
61
62 63

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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.