We are live on ! Find out more
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
TFC icon
701
Truist Financial
TFC
$64.9B
$2.01M 0.01%
34,281
-2,934
-8% -$164K
MYGN icon
702
Myriad Genetics
MYGN
$309M
$2.01M 0.01%
62,119
+50,000
+413% +$1.66M
GAIN icon
703
Gladstone Investment Corp
GAIN
$658M
$2M 0.01%
144,374
+2,485
+2% +$36K
SNAP icon
704
Snap
SNAP
$8.83B
$2M 0.01%
27,039
-91
-0.3% -$6.58K
EWJ icon
705
iShares MSCI Japan ETF
EWJ
$23.2B
$1.99M 0.01%
28,335
-1,562
-5% -$108K
DGX icon
706
Quest Diagnostics
DGX
$26.1B
$1.99M 0.01%
13,658
-935
-6% -$137K
SOXX icon
707
iShares Semiconductor ETF
SOXX
$47.3B
$1.98M 0.01%
13,320
+3
+0% +$456
FSLY icon
708
Fastly Inc
FSLY
$4.55B
$1.98M 0.01%
48,886
-42,161
-46% -$1.95M
LEN icon
709
Lennar Class A
LEN
$21B
$1.97M 0.01%
21,663
+62
+0.3% +$6.14K
PLD icon
710
Prologis
PLD
$134B
$1.96M 0.01%
15,592
+865
+6% +$112K
BFAM icon
711
Bright Horizons
BFAM
$3.82B
$1.93M 0.01%
13,846
+107
+0.8% +$15.7K
NBIX icon
712
Neurocrine Biosciences
NBIX
$15.4B
$1.93M 0.01%
20,077
+162
+0.8% +$15.3K
PRLB icon
713
Protolabs
PRLB
$2.2B
$1.92M 0.01%
28,894
-26,798
-48% -$2.09M
MORN icon
714
Morningstar
MORN
$7.49B
$1.92M 0.01%
7,422
– –
ED icon
715
Consolidated Edison
ED
$40B
$1.92M 0.01%
26,480
-569
-2% -$42.5K
FICO icon
716
Fair Isaac
FICO
$23.1B
$1.92M 0.01%
4,820
+40
+0.8% +$19K
GRUB
717
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
$1.91M 0.01%
131,721
-13,550
-9% -$237K
ALL icon
718
Allstate
ALL
$65.3B
$1.91M 0.01%
15,019
+2,344
+18% +$310K
ACWI icon
719
iShares MSCI ACWI ETF
ACWI
$33.6B
$1.91M 0.01%
19,064
-1,560
-8% -$160K
PHYS icon
720
Sprott Physical Gold
PHYS
$15.8B
$1.89M 0.01%
137,063
-48,402
-26% -$685K
FFIC
721
DELISTED
Flushing Financial
FFIC
$1.88M 0.01%
83,170
– –
NEM icon
722
Newmont
NEM
$120B
$1.88M 0.01%
34,611
-799
-2% -$47.1K
WTW icon
723
Willis Towers Watson
WTW
$30.9B
$1.87M 0.01%
8,044
+1,461
+22% +$325K
LSTR icon
724
Landstar System
LSTR
$6.41B
$1.85M 0.01%
11,710
-1,514
-11% -$242K
VCSH icon
725
Vanguard Short-Term Corporate Bond ETF
VCSH
$45.1B
$1.84M 0.01%
22,388
+1,769
+9% +$146K
27 28
29
30 31

Similar funds

Parallax Volatility Advisers
Parallax Volatility Advisers San Francisco, California $38.6B AUM 45.89% 1-Year Est. Return
Credit Agricole
Credit Agricole Montrouge Cedex, France $38.1B AUM
Carson Wealth (CWM LLC)
Carson Wealth (CWM LLC) Omaha, Nebraska $38.1B AUM 19.66% 1-Year Est. Return
Nomura Holdings
Nomura Holdings Tokyo, Japan $37.7B AUM 34.44% 1-Year Est. Return
Fayez Sarofim & Co
Fayez Sarofim & Co Houston, Texas $39.1B AUM 15.14% 1-Year Est. Return
HF
HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return
First Manhattan
First Manhattan New York $36.1B AUM 11.5% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return

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.