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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
LYV icon
101
Live Nation Entertainment
LYV
$43.2B
$68M 0.23%
746,507
+155,193
+26% +$13.1M
LMBS icon
102
First Trust Exchange-Traded Fund IV First Trust Low Duration Opportunities ETF
LMBS
$6.39B
$63.7M 0.22%
1,259,744
+1,698
+0.1% +$86.2K
OPRX icon
103
OptimizeRx
OPRX
$132M
$63.3M 0.22%
739,707
-15,367
-2% -$964K
EXAS
104
DELISTED
Exact Sciences
EXAS
$62.5M 0.21%
654,902
-46,507
-7% -$4.91M
ROL icon
105
Rollins
ROL
$17.6B
$62.4M 0.21%
1,767,184
+66,166
+4% +$2.48M
MKC icon
106
McCormick & Company Non-Voting
MKC
$14.3B
$62.1M 0.21%
766,943
-9,835
-1% -$844K
VEU icon
107
Vanguard FTSE All-World ex-US ETF
VEU
$70.4B
$61.9M 0.21%
1,015,143
-26,803
-3% -$1.69M
QQQ icon
108
Invesco QQQ Trust
QQQ
$482B
$61.8M 0.21%
172,545
+2,237
+1% +$824K
LLY icon
109
Eli Lilly
LLY
$1.09T
$61.6M 0.21%
266,590
-796
-0.3% -$196K
MDT icon
110
Medtronic
MDT
$116B
$61.3M 0.21%
489,056
+3,902
+0.8% +$505K
ADP icon
111
Automatic Data Processing
ADP
$106B
$61.1M 0.21%
305,601
+2,966
+1% +$611K
EFA icon
112
iShares MSCI EAFE ETF
EFA
$80.1B
$60.7M 0.21%
777,986
-4,251
-0.5% -$340K
P
113
Everpure Inc
P
$37.2B
$60.6M 0.21%
2,409,416
-490,157
-17% -$10.8M
LOW icon
114
Lowe's Companies
LOW
$122B
$60.4M 0.21%
297,736
-6,059
-2% -$1.21M
BA icon
115
Boeing
BA
$183B
$59M 0.2%
268,469
-4,255
-2% -$949K
TXN icon
116
Texas Instruments
TXN
$254B
$59M 0.2%
307,167
-12,263
-4% -$2.34M
BLK icon
117
Blackrock
BLK
$179B
$58.5M 0.2%
69,808
+1,616
+2% +$1.45M
MRVI icon
118
Maravai LifeSciences
MRVI
$872M
$57.4M 0.2%
1,169,280
+196,650
+20% +$9.59M
VZ icon
119
Verizon
VZ
$195B
$54.9M 0.19%
1,017,154
-42,560
-4% -$2.35M
VTV icon
120
Vanguard Morningstar Value ETF
VTV
$193B
$54.8M 0.19%
404,886
+14,035
+4% +$1.95M
OSH
121
DELISTED
Oak Street Health, Inc.
OSH
$54M 0.18%
1,270,160
+56,014
+5% +$3.01M
TSLA icon
122
Tesla
TSLA
$1.29T
$52.8M 0.18%
204,405
-3,396
-2% -$799K
MRK icon
123
Merck
MRK
$330B
$51.2M 0.17%
681,330
+55,013
+9% +$4.18M
IBM icon
124
IBM
IBM
$221B
$51M 0.17%
383,931
-2,770
-0.7% -$370K
IWV icon
125
iShares Russell 3000 ETF
IWV
$20.4B
$50.9M 0.17%
199,751
-278
-0.1% -$72.8K
3 4
5
6 7

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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.