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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
+1.99%
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
$29.4B
AUM Growth
+$519M
Cap. Flow
+$281M
Cap. Flow %
0.96%
Top 10 Hldgs %
23.58%
Holding
1,987
New
99
Increased
752
Reduced
666
Closed
108

Top Buys

Rank Stock Value
1
ABNB icon
Airbnb
ABNB
+$45.2M
2
CHWY icon
Chewy
CHWY
+$31.5M
3
U icon
Unity
U
+$23.3M
4
RYAN icon
Ryan Specialty Holdings
RYAN
+$22.4M
5
AMZN icon
Amazon
AMZN
+$21.5M

Top Sells

Rank Stock Value
1
IDXX icon
Idexx Laboratories
IDXX
+$37.7M
2
GD icon
General Dynamics
GD
+$33.5M
3
ECL icon
Ecolab
ECL
+$31.7M
4
JNJ icon
Johnson & Johnson
JNJ
+$20.9M
5
UBER icon
Uber
UBER
+$19.2M

Sector Composition

Rank Sector Weight
1 Technology 26.19%
2 Healthcare 19.81%
3 Financials 11.61%
4 Consumer Discretionary 10.68%
5 Industrials 9.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
PGR icon
51
Progressive
PGR
$121B
$127M 0.43%
1,408,898
-29,705
-2% -$2.83M
TEAM icon
52
Atlassian
TEAM
$38.8B
$126M 0.43%
322,085
+1,316
+0.4% +$439K
GSHD icon
53
Goosehead Insurance
GSHD
$2.32B
$121M 0.41%
795,061
+21,481
+3% +$2.9M
ABBV icon
54
AbbVie
ABBV
$438B
$120M 0.41%
1,114,233
-80,055
-7% -$9.15M
SPT icon
55
Sprout Social
SPT
$581M
$120M 0.41%
981,590
-20,757
-2% -$2.25M
TDG icon
56
TransDigm Group
TDG
$68.8B
$113M 0.39%
181,550
-1,601
-0.9% -$1M
IVV icon
57
iShares Core S&P 500 ETF
IVV
$904B
$113M 0.38%
261,675
-1,985
-0.8% -$880K
NOW icon
58
ServiceNow
NOW
$129B
$112M 0.38%
903,660
+29,325
+3% +$3.55M
SPLK
59
DELISTED
Splunk Inc
SPLK
$112M 0.38%
777,091
+16,615
+2% +$2.42M
APH icon
60
Amphenol
APH
$211B
$112M 0.38%
3,050,438
-27,918
-0.9% -$1.03M
CTAS icon
61
Cintas
CTAS
$81.9B
$111M 0.38%
1,168,996
+19,016
+2% +$1.86M
WMT icon
62
Walmart Inc
WMT
$918B
$111M 0.38%
2,388,789
+52,575
+2% +$2.53M
BX icon
63
Blackstone
BX
$110B
$111M 0.38%
953,168
+13,160
+1% +$1.53M
PG icon
64
Procter & Gamble
PG
$336B
$111M 0.38%
790,668
-37,628
-5% -$5.33M
NVDA icon
65
NVIDIA
NVDA
$5.41T
$105M 0.36%
5,063,290
+21,890
+0.4% +$455K
EW icon
66
Edwards Lifesciences
EW
$53.6B
$105M 0.36%
923,784
-629
-0.1% -$71.8K
UNP icon
67
Union Pacific
UNP
$174B
$104M 0.35%
530,724
+41,807
+9% +$9.03M
AXP icon
68
American Express
AXP
$231B
$102M 0.35%
607,764
+18,869
+3% +$3.15M
FTV icon
69
Fortive
FTV
$18.5B
$102M 0.35%
1,912,231
-49,785
-3% -$2.73M
VEA icon
70
Vanguard FTSE Developed Markets ETF
VEA
$238B
$101M 0.35%
2,009,901
-48,021
-2% -$2.5M
ITW icon
71
Illinois Tool Works
ITW
$83.3B
$99.5M 0.34%
481,628
-3,415
-0.7% -$770K
YETI icon
72
Yeti Holdings
YETI
$3.76B
$98.9M 0.34%
1,154,461
+123,881
+12% +$12M
KO icon
73
Coca-Cola
KO
$374B
$96.9M 0.33%
1,847,401
+103,550
+6% +$5.77M
ABNB icon
74
Airbnb
ABNB
$108B
$96.2M 0.33%
573,498
+296,043
+107% +$45.2M
AME icon
75
Ametek
AME
$59.2B
$95.1M 0.32%
766,940
+4,013
+0.5% +$539K
1 2
3
4 5

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William Blair & Company's Q3 2021 Portfolio in Review

As of Q3 2021, William Blair & Company held 1,987 positions worth $29.4B, up 1.8% from $28.9B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q3 2021 filing shows 99 new, 752 increased, 666 reduced and 108 closed positions. Its largest new stake was Ryan Specialty Holdings: 709,555 shares worth $24M. The largest sale was Idexx Laboratories, an estimated $37.7M.

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 Q3 2021 buy was Ryan Specialty Holdings: 709,555 shares worth $24M.
  • William Blair & Company added most to Airbnb in Q3 2021, an estimated $45.2M increase.
  • William Blair & Company's biggest Q3 2021 reduction was Idexx Laboratories, cutting an estimated $37.7M.
  • William Blair & Company fully exited Slack Technologies, Inc. in Q3 2021, selling an estimated $13.8M.
  • William Blair & Company's ten largest holdings make up 24% of its $29.4B portfolio in Q3 2021.
  • William Blair & Company opened 99 new positions and closed 108 in Q3 2021.
  • William Blair & Company's portfolio value rose 1.8% quarter-over-quarter to $29.4B.

Based on William Blair & Company's 13F filing for Q3 2021, filed 12 Nov 2021.