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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
DIS icon
51
Walt Disney
DIS
$182B
$136M 0.43%
875,226
-210,731
-19% -$34M
UNP icon
52
Union Pacific
UNP
$175B
$135M 0.42%
537,541
+6,817
+1% +$1.61M
APH icon
53
Amphenol
APH
$210B
$135M 0.42%
3,076,520
+26,082
+0.9% +$1.06M
OKTA icon
54
Okta
OKTA
$24.9B
$132M 0.41%
586,991
+6,493
+1% +$1.55M
IVV icon
55
iShares Core S&P 500 ETF
IVV
$897B
$131M 0.41%
274,686
+13,011
+5% +$6M
GWRE icon
56
Guidewire Software
GWRE
$13.3B
$131M 0.41%
1,152,662
+18,575
+2% +$2.2M
CTAS icon
57
Cintas
CTAS
$80.9B
$131M 0.41%
1,180,936
+11,940
+1% +$1.29M
EW icon
58
Edwards Lifesciences
EW
$51.5B
$122M 0.38%
945,468
+21,684
+2% +$2.53M
TEAM icon
59
Atlassian
TEAM
$28B
$122M 0.38%
319,257
-2,828
-0.9% -$1.14M
WMT icon
60
Walmart Inc
WMT
$892B
$119M 0.37%
2,474,829
+86,040
+4% +$4.11M
KO icon
61
Coca-Cola
KO
$374B
$118M 0.37%
1,984,641
+137,240
+7% +$7.64M
ITW icon
62
Illinois Tool Works
ITW
$84.8B
$117M 0.37%
474,993
-6,635
-1% -$1.54M
TWLO icon
63
Twilio
TWLO
$29.3B
$116M 0.36%
440,879
+16,580
+4% +$4.96M
AME icon
64
Ametek
AME
$57.6B
$114M 0.36%
776,222
+9,282
+1% +$1.27M
TDG icon
65
TransDigm Group
TDG
$69.8B
$113M 0.36%
178,318
-3,232
-2% -$2.02M
ROK icon
66
Rockwell Automation
ROK
$49.2B
$112M 0.35%
321,583
+20,665
+7% +$6.84M
PGR icon
67
Progressive
PGR
$125B
$110M 0.34%
1,067,386
-341,512
-24% -$32.6M
CHWY icon
68
Chewy
CHWY
$9.59B
$109M 0.34%
1,846,278
-109,298
-6% -$7.15M
ABNB icon
69
Airbnb
ABNB
$90B
$107M 0.34%
641,527
+68,029
+12% +$12M
ALGN icon
70
Align Technology
ALGN
$12.1B
$106M 0.33%
161,028
+31,252
+24% +$20.1M
ISRG icon
71
Intuitive Surgical
ISRG
$132B
$105M 0.33%
293,603
+20,828
+8% +$7.17M
VEA icon
72
Vanguard FTSE Developed Markets ETF
VEA
$234B
$104M 0.33%
2,040,024
+30,123
+1% +$1.55M
GSHD icon
73
Goosehead Insurance
GSHD
$2.37B
$102M 0.32%
787,748
-7,313
-0.9% -$1.05M
TMO icon
74
Thermo Fisher Scientific
TMO
$214B
$102M 0.32%
152,954
+2,189
+1% +$1.37M
AXP icon
75
American Express
AXP
$231B
$102M 0.32%
623,170
+15,406
+3% +$2.63M
1 2
3
4 5

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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.