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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
CAT icon
201
Caterpillar
CAT
$393B
$25.8M 0.09%
134,575
+4,285
+3% +$892K
MRCY icon
202
Mercury Systems
MRCY
$6.7B
$25.6M 0.09%
539,692
-215,287
-29% -$12M
EL icon
203
Estee Lauder
EL
$31.7B
$25.5M 0.09%
85,010
+3,588
+4% +$1.17M
IWF icon
204
iShares Russell 1000 Growth ETF
IWF
$128B
$25.4M 0.09%
370,868
+30,624
+9% +$2.17M
CL icon
205
Colgate-Palmolive
CL
$73.6B
$25.4M 0.09%
335,618
-18,183
-5% -$1.44M
VWO icon
206
Vanguard FTSE Emerging Markets ETF
VWO
$126B
$25.3M 0.09%
506,404
+727
+0.1% +$37.6K
RYAN icon
207
Ryan Specialty Holdings
RYAN
$11B
$24M 0.08%
+709,555
New +$22.4M
EHC icon
208
Encompass Health
EHC
$12.3B
$23.8M 0.08%
399,478
+61,312
+18% +$3.86M
HEI icon
209
HEICO Corp
HEI
$52.1B
$23.8M 0.08%
180,644
-2,073
-1% -$273K
SPSB icon
210
State Street SPDR Portfolio Short Term Corporate Bond ETF
SPSB
$10.8B
$23.6M 0.08%
754,713
-33,733
-4% -$1.05M
MU icon
211
Micron Technology
MU
$1.03T
$23.2M 0.08%
327,185
+30,196
+10% +$2.27M
COLD icon
212
Americold
COLD
$4.17B
$23.2M 0.08%
798,936
+22,206
+3% +$814K
AZN icon
213
AstraZeneca
AZN
$246B
$22.5M 0.08%
187,652
-3,171
-2% -$369K
VNQ icon
214
Vanguard Real Estate ETF
VNQ
$38.6B
$21.9M 0.07%
214,870
+15,315
+8% +$1.62M
IEFA icon
215
iShares Core MSCI EAFE ETF
IEFA
$196B
$21.6M 0.07%
290,345
+32,973
+13% +$2.51M
PLNT icon
216
Planet Fitness
PLNT
$3.65B
$21.5M 0.07%
274,237
-7,452
-3% -$566K
ESGD icon
217
iShares ESG Aware MSCI EAFE ETF
ESGD
$12.3B
$21.2M 0.07%
270,452
-17,442
-6% -$1.4M
ULTA icon
218
Ulta Beauty
ULTA
$22.9B
$21.1M 0.07%
58,333
+477
+0.8% +$172K
RTX icon
219
RTX Corp
RTX
$300B
$21M 0.07%
243,921
-622
-0.3% -$53.2K
FTNT icon
220
Fortinet
FTNT
$118B
$20.8M 0.07%
356,855
+20,945
+6% +$1.21M
BAH icon
221
Booz Allen Hamilton
BAH
$9.43B
$20.8M 0.07%
262,510
-20,934
-7% -$1.75M
CONE
222
DELISTED
CyrusOne Inc Common Stock
CONE
$20.4M 0.07%
263,860
+510
+0.2% +$38.4K
T icon
223
AT&T
T
$166B
$20.4M 0.07%
998,460
-59,021
-6% -$1.24M
PLMR icon
224
Palomar
PLMR
$3.36B
$20.2M 0.07%
249,593
+40,383
+19% +$3.33M
TENB icon
225
Tenable Holdings
TENB
$4.08B
$20M 0.07%
432,736
-11,071
-2% -$486K
7 8
9
10 11

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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.