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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
BR icon
376
Broadridge
BR
$19.3B
$7.44M 0.03%
44,630
+886
+2% +$151K
NVS icon
377
Novartis
NVS
$290B
$7.42M 0.03%
90,745
-4,756
-5% -$428K
ICLR icon
378
Icon
ICLR
$12.9B
$7.41M 0.03%
28,283
+21,968
+348% +$5.34M
SPCE icon
379
Virgin Galactic
SPCE
$500M
$7.36M 0.03%
14,535
-226
-2% -$134K
UNF icon
380
Unifirst Corp
UNF
$5.24B
$7.33M 0.03%
34,495
-716
-2% -$158K
GPN icon
381
Global Payments
GPN
$23.4B
$7.25M 0.02%
46,012
-29,851
-39% -$5.19M
KNSL icon
382
Kinsale Capital Group
KNSL
$8.51B
$7.23M 0.02%
44,694
-544
-1% -$94.4K
ETN icon
383
Eaton
ETN
$179B
$7.2M 0.02%
48,246
+2,225
+5% +$356K
PHO icon
384
Invesco Water Resources ETF
PHO
$2.06B
$7.01M 0.02%
128,160
+850
+0.7% +$48.2K
RKLB icon
385
Rocket Lab Corp
RKLB
$51.9B
$6.97M 0.02%
+432,040
New +$5.2M
GIS icon
386
General Mills
GIS
$20.4B
$6.94M 0.02%
116,066
-2,125
-2% -$126K
NUAN
387
DELISTED
Nuance Communications, Inc.
NUAN
$6.93M 0.02%
126,002
-6,989
-5% -$384K
TRV icon
388
Travelers Companies
TRV
$77.2B
$6.9M 0.02%
45,419
+1,373
+3% +$213K
CNI icon
389
Canadian National Railway
CNI
$76.4B
$6.89M 0.02%
59,611
-196
-0.3% -$21.7K
PRAA icon
390
PRA Group
PRAA
$737M
$6.85M 0.02%
162,650
-29,543
-15% -$1.18M
IFF icon
391
International Flavors & Fragrances
IFF
$21.4B
$6.82M 0.02%
50,969
+2,474
+5% +$363K
BLBD icon
392
Blue Bird Corp
BLBD
$2.04B
$6.81M 0.02%
326,628
+66,534
+26% +$1.48M
MO icon
393
Altria Group
MO
$107B
$6.81M 0.02%
149,604
-49,557
-25% -$2.39M
TEL icon
394
TE Connectivity
TEL
$62B
$6.8M 0.02%
49,581
+489
+1% +$70.6K
BIDU icon
395
Baidu
BIDU
$35.6B
$6.8M 0.02%
44,200
+1,839
+4% +$302K
CACC icon
396
Credit Acceptance
CACC
$5.99B
$6.78M 0.02%
11,586
– –
USMV icon
397
iShares MSCI USA Min Vol Factor ETF
USMV
$24.4B
$6.75M 0.02%
91,866
-149
-0.2% -$11.3K
WY icon
398
Weyerhaeuser
WY
$17.8B
$6.74M 0.02%
189,410
+20,119
+12% +$705K
CRWD icon
399
CrowdStrike
CRWD
$226B
$6.67M 0.02%
108,608
+11,816
+12% +$762K
AIRG icon
400
Airgain
AIRG
$69.3M
$6.63M 0.02%
525,568
+88,030
+20% +$1.38M
14 15
16
17 18

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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.