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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
RDVY icon
576
First Trust Rising Dividend Achievers ETF
RDVY
$25.7B
$3.13M 0.01%
65,881
+56,750
+622% +$2.75M
DHI icon
577
D.R. Horton
DHI
$41.6B
$3.11M 0.01%
37,086
+17,500
+89% +$1.61M
STWD icon
578
Starwood Property Trust
STWD
$6.04B
$3.1M 0.01%
126,994
+929
+0.7% +$23.8K
CDLX icon
579
Cardlytics
CDLX
$24.9M
$3.06M 0.01%
3,639
-1,567
-30% -$1.59M
ICLN icon
580
iShares Global Clean Energy ETF
ICLN
$2.1B
$3.05M 0.01%
140,932
+369
+0.3% +$8.41K
OKE icon
581
Oneok
OKE
$58.6B
$3.04M 0.01%
52,419
+11,399
+28% +$613K
SU icon
582
Suncor Energy
SU
$76.1B
$3.04M 0.01%
146,370
-16,921
-10% -$338K
URI icon
583
United Rentals
URI
$69.7B
$3.02M 0.01%
8,593
+2,971
+53% +$997K
AIG icon
584
American International
AIG
$39.7B
$3M 0.01%
54,685
+37,842
+225% +$1.95M
HEEM icon
585
iShares Currency Hedged MSCI Emerging Markets
HEEM
$293M
$2.99M 0.01%
98,210
-48
-0% -$1.5K
BWXT icon
586
BWX Technologies
BWXT
$15.4B
$2.99M 0.01%
55,555
-4,617
-8% -$260K
HBAN icon
587
Huntington Bancshares
HBAN
$36.1B
$2.99M 0.01%
193,560
+3,565
+2% +$52.5K
VIGI icon
588
Vanguard International Dividend Appreciation ETF
VIGI
$9.28B
$2.99M 0.01%
34,252
+22,374
+188% +$2M
DEED icon
589
First Trust Securitized Plus ETF
DEED
$64.8M
$2.98M 0.01%
115,000
– –
ETR icon
590
Entergy
ETR
$49.8B
$2.98M 0.01%
59,916
+6,128
+11% +$328K
HIW icon
591
Highwoods Properties
HIW
$3.5B
$2.96M 0.01%
67,523
+11,360
+20% +$520K
IBN icon
592
ICICI Bank
IBN
$106B
$2.96M 0.01%
156,979
+4,300
+3% +$80.6K
RVNC
593
DELISTED
Revance Therapeutics, Inc.
RVNC
$2.96M 0.01%
106,231
+35,597
+50% +$1.02M
VRTX icon
594
Vertex Pharmaceuticals
VRTX
$133B
$2.95M 0.01%
16,250
-6,500
-29% -$1.27M
MAR icon
595
Marriott International
MAR
$92.7B
$2.95M 0.01%
19,896
+4,743
+31% +$662K
CLVT icon
596
Clarivate
CLVT
$1.18B
$2.94M 0.01%
134,055
+17,801
+15% +$433K
IJK icon
597
iShares S&P Mid-Cap 400 Growth ETF
IJK
$11.3B
$2.93M 0.01%
36,986
-5,683
-13% -$461K
IMGN
598
DELISTED
Immunogen Inc
IMGN
$2.92M 0.01%
515,600
+691
+0.1% +$3.99K
OLO
599
DELISTED
Olo Inc
OLO
$2.91M 0.01%
96,979
+27,208
+39% +$971K
DV icon
600
DoubleVerify
DV
$2.04B
$2.91M 0.01%
85,144
+52,157
+158% +$1.84M
22 23
24
25 26

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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.