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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
BILL icon
151
BILL Holdings
BILL
$4.85B
$38.7M 0.13%
144,963
+1,874
+1% +$432K
GD icon
152
General Dynamics
GD
$107B
$38.5M 0.13%
196,193
-171,333
-47% -$33.5M
QDEL icon
153
QuidelOrtho
QDEL
$1.02B
$38.4M 0.13%
272,095
-24,080
-8% -$3.24M
UPS icon
154
United Parcel Service
UPS
$88.4B
$38.1M 0.13%
209,016
-222
-0.1% -$43.8K
BL icon
155
BlackLine
BL
$1.65B
$37.7M 0.13%
319,063
+652
+0.2% +$74.9K
SHOP icon
156
Shopify
SHOP
$194B
$37.5M 0.13%
276,380
+1,170
+0.4% +$175K
NEE icon
157
NextEra Energy
NEE
$179B
$36.9M 0.13%
469,951
+47,288
+11% +$3.81M
WAB icon
158
Wabtec
WAB
$49.9B
$36.9M 0.13%
427,584
+42,080
+11% +$3.62M
TIP icon
159
iShares TIPS Bond ETF
TIP
$14.7B
$36.7M 0.12%
287,427
+16,778
+6% +$2.16M
SMG icon
160
ScottsMiracle-Gro
SMG
$3.62B
$36.7M 0.12%
250,706
+11,219
+5% +$1.84M
MRVL icon
161
Marvell Technology
MRVL
$195B
$36.6M 0.12%
607,271
+21,171
+4% +$1.27M
CME icon
162
CME Group
CME
$94.3B
$36.3M 0.12%
187,766
+33,007
+21% +$6.69M
DAY
163
DELISTED
Dayforce
DAY
$35.8M 0.12%
317,896
+7,856
+3% +$825K
RNG icon
164
RingCentral
RNG
$5.26B
$34.8M 0.12%
160,166
-73,425
-31% -$18.6M
CVS icon
165
CVS Health
CVS
$121B
$34.8M 0.12%
409,500
+25,360
+7% +$2.12M
INTC icon
166
Intel
INTC
$509B
$34.3M 0.12%
642,989
+18,588
+3% +$1.01M
CCI icon
167
Crown Castle
CCI
$31.5B
$33.9M 0.12%
195,457
+2,869
+1% +$555K
DE icon
168
Deere & Co
DE
$167B
$33.5M 0.11%
100,104
+13,250
+15% +$4.77M
CMG icon
169
Chipotle Mexican Grill
CMG
$41.3B
$33.5M 0.11%
922,000
-52,250
-5% -$1.9M
UBER icon
170
Uber
UBER
$154B
$32.2M 0.11%
719,061
-439,989
-38% -$19.2M
MDY icon
171
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27.2B
$30.8M 0.1%
64,065
+1,835
+3% +$901K
GLD icon
172
SPDR Gold Trust
GLD
$144B
$30.6M 0.1%
186,443
-6,390
-3% -$1.07M
PAYX icon
173
Paychex
PAYX
$42.8B
$30.3M 0.1%
269,683
-2,928
-1% -$329K
BABA icon
174
Alibaba
BABA
$300B
$30.3M 0.1%
204,723
-70,799
-26% -$12.9M
CCOI icon
175
Cogent Communications
CCOI
$525M
$30.2M 0.1%
425,909
+85,551
+25% +$6.36M
5 6
7
8 9

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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.