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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
IUSV icon
126
iShares Core S&P US Value ETF
IUSV
$27.8B
$50.7M 0.17%
715,464
-24,842
-3% -$1.8M
PCTY icon
127
Paylocity
PCTY
$7.73B
$50.4M 0.17%
179,758
-849
-0.5% -$204K
WST icon
128
West Pharmaceutical
WST
$24.8B
$49.9M 0.17%
117,494
-11,068
-9% -$4.67M
PANW icon
129
Palo Alto Networks
PANW
$315B
$49.7M 0.17%
622,734
+7,548
+1% +$530K
COUP
130
DELISTED
Coupa Software Incorporated
COUP
$49.7M 0.17%
226,652
+27,252
+14% +$6.4M
CVNA icon
131
Carvana
CVNA
$79.7B
$49.6M 0.17%
822,055
+5,465
+0.7% +$363K
JLL icon
132
Jones Lang LaSalle
JLL
$16.7B
$49.5M 0.17%
199,618
+20,959
+12% +$4.78M
PFE icon
133
Pfizer
PFE
$150B
$49.2M 0.17%
1,143,795
+55,915
+5% +$2.48M
VUG icon
134
Vanguard Morningstar Growth ETF
VUG
$229B
$49.1M 0.17%
1,015,746
-110,370
-10% -$5.49M
IWM icon
135
iShares Russell 2000 ETF
IWM
$82.2B
$48.8M 0.17%
223,117
+1,281
+0.6% +$284K
CVX icon
136
Chevron
CVX
$386B
$48.5M 0.17%
478,522
+37,462
+8% +$3.74M
HOLX
137
DELISTED
Hologic
HOLX
$48.3M 0.16%
654,972
+90,460
+16% +$6.78M
BAC icon
138
Bank of America
BAC
$453B
$48.3M 0.16%
1,138,037
+53,958
+5% +$2.17M
BALL icon
139
Ball Corp
BALL
$16.5B
$48.2M 0.16%
536,203
-28,026
-5% -$2.49M
ANET icon
140
Arista Networks
ANET
$266B
$47.7M 0.16%
2,219,184
+1,264
+0.1% +$29K
ORLY icon
141
O'Reilly Automotive
ORLY
$74.5B
$45.6M 0.16%
1,118,805
+39,810
+4% +$1.59M
HON icon
142
Honeywell
HON
$74.6B
$43.8M 0.15%
219,095
+6,857
+3% +$1.46M
DVAX
143
DELISTED
Dynavax Technologies
DVAX
$43.2M 0.15%
2,251,294
-123,921
-5% -$1.65M
QCOM icon
144
Qualcomm
QCOM
$171B
$42.9M 0.15%
332,841
+24,385
+8% +$3.46M
ZM icon
145
Zoom
ZM
$30.8B
$41.7M 0.14%
159,279
+10,764
+7% +$3.63M
MMM icon
146
3M
MMM
$94.8B
$41M 0.14%
279,842
+8,232
+3% +$1.33M
IRTC icon
147
iRhythm Holdings
IRTC
$4.13B
$40.4M 0.14%
690,224
+55,540
+9% +$2.94M
GILD icon
148
Gilead Sciences
GILD
$168B
$40.2M 0.14%
576,083
-43,866
-7% -$3.08M
DLB icon
149
Dolby
DLB
$5.75B
$39.9M 0.14%
453,385
-24,968
-5% -$2.42M
RBA icon
150
RB Global
RBA
$16B
$39.6M 0.13%
641,566
+2,616
+0.4% +$160K
4 5
6
7 8

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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.