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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
VIS icon
501
Vanguard Industrials ETF
VIS
$8.5B
$4.1M 0.01%
21,802
+640
+3% +$126K
ENB icon
502
Enbridge
ENB
$112B
$4.08M 0.01%
102,501
+17,373
+20% +$685K
PRU icon
503
Prudential Financial
PRU
$42.3B
$4.04M 0.01%
38,368
+4,516
+13% +$465K
XLY icon
504
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$23.4B
$3.99M 0.01%
44,498
-164
-0.4% -$14.9K
YUM icon
505
Yum! Brands
YUM
$41B
$3.99M 0.01%
32,640
-268
-0.8% -$34K
CTLT
506
DELISTED
CATALENT, INC.
CTLT
$3.98M 0.01%
29,881
+637
+2% +$79.5K
CNNE icon
507
Cannae Holdings
CNNE
$651M
$3.95M 0.01%
126,901
-980
-0.8% -$31.5K
XLU icon
508
State Street Utilities Select Sector SPDR ETF
XLU
$22.8B
$3.94M 0.01%
123,434
+1,390
+1% +$46.5K
OBDC icon
509
Blue Owl Capital
OBDC
$5.75B
$3.94M 0.01%
278,972
-18,092
-6% -$262K
MET icon
510
MetLife
MET
$61.4B
$3.92M 0.01%
63,555
+14,838
+30% +$893K
FSV icon
511
FirstService
FSV
$6.24B
$3.88M 0.01%
21,507
+540
+3% +$99.9K
BIIB icon
512
Biogen
BIIB
$30.9B
$3.87M 0.01%
13,685
+2,297
+20% +$753K
WEC icon
513
WEC Energy
WEC
$35.6B
$3.86M 0.01%
43,781
-843
-2% -$79.1K
LSCC icon
514
Lattice Semiconductor
LSCC
$18.4B
$3.86M 0.01%
59,706
+335
+0.6% +$19.8K
VOT icon
515
Vanguard Morningstar Mid-Cap Growth ETF
VOT
$20B
$3.84M 0.01%
16,241
-25
-0.2% -$6.05K
ETSY icon
516
Etsy
ETSY
$7.31B
$3.83M 0.01%
18,423
+4,331
+31% +$878K
VONG icon
517
Vanguard Russell 1000 Growth ETF
VONG
$45.7B
$3.82M 0.01%
54,154
+7,561
+16% +$550K
CWB icon
518
State Street SPDR Bloomberg Convertible Securities ETF
CWB
$5.72B
$3.81M 0.01%
44,685
+1,753
+4% +$151K
GBCI icon
519
Glacier Bancorp
GBCI
$6.4B
$3.81M 0.01%
68,870
-1,100
-2% -$57.9K
CTVA icon
520
Corteva
CTVA
$50.4B
$3.8M 0.01%
90,318
+6,426
+8% +$278K
CF icon
521
CF Industries
CF
$18.2B
$3.8M 0.01%
68,021
+15,661
+30% +$752K
GSBD icon
522
Goldman Sachs BDC
GSBD
$1.08B
$3.78M 0.01%
206,109
+13,185
+7% +$252K
LQD icon
523
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$32.7B
$3.75M 0.01%
28,224
-1,481
-5% -$200K
TPL icon
524
Texas Pacific Land
TPL
$23.6B
$3.75M 0.01%
27,918
+4,941
+22% +$768K
COF icon
525
Capital One
COF
$136B
$3.75M 0.01%
23,124
-2,552
-10% -$416K
19 20
21
22 23

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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.