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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
SHYG icon
1626
iShares 0-5 Year High Yield Corporate Bond ETF
SHYG
$7.61B
$68K ﹤0.01%
1,482
+8
+0.5% +$366
IPAY icon
1627
Amplify Mobile Payments ETF
IPAY
$181M
$67K ﹤0.01%
990
-77
-7% -$5.44K
SEEL
1628
DELISTED
Seelos Therapeutics, Inc. Common Stock
SEEL
$67K ﹤0.01%
+7
New +$60.2K
AKBA icon
1629
Akebia Therapeutics
AKBA
$248M
$66K ﹤0.01%
22,905
-4,058
-15% -$11.6K
DFEB icon
1630
FT Vest US Equity Deep Buffer ETF February
DFEB
$463M
$66K ﹤0.01%
1,933
– –
JHML icon
1631
John Hancock Multifactor Large Cap ETF
JHML
$1.2B
$66K ﹤0.01%
1,207
– –
SLYV icon
1632
State Street SPDR S&P 600 Small Cap Value ETF
SLYV
$5.08B
$66K ﹤0.01%
800
-24
-3% -$1.97K
BGY icon
1633
BlackRock Enhanced International Dividend Trust
BGY
$532M
$65K ﹤0.01%
10,627
-160
-1% -$1.02K
BIV icon
1634
Vanguard Intermediate-Term Bond ETF
BIV
$28.8B
$65K ﹤0.01%
728
– –
GUNR icon
1635
FlexShares Global Upstream Natural Resources Index Fund
GUNR
$7.09B
$65K ﹤0.01%
1,781
-2,623
-60% -$97.7K
JNK icon
1636
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.31B
$65K ﹤0.01%
598
-127
-18% -$13.9K
HEWG
1637
DELISTED
iShares Currency Hedged MSCI Germany ETF
HEWG
$65K ﹤0.01%
2,039
– –
SPYD icon
1638
State Street SPDR Portfolio S&P 500 High Dividend ETF
SPYD
$7.69B
$63K ﹤0.01%
1,603
– –
RESE
1639
DELISTED
WisdomTree Emerging Markets ESG Fund
RESE
$62K ﹤0.01%
1,734
+9
+0.5% +$337
IMCG icon
1640
iShares Morningstar Mid-Cap Growth ETF
IMCG
$4.16B
$61K ﹤0.01%
882
– –
NDRA icon
1641
ENDRA Life Sciences
NDRA
$5.68M
$61K ﹤0.01%
1
– –
AIVI icon
1642
WisdomTree International AI Enhanced Value Fund
AIVI
$63.1M
$59K ﹤0.01%
1,450
– –
ITEQ icon
1643
Amplify BlueStar Israel Technology ETF
ITEQ
$118M
$59K ﹤0.01%
900
– –
QQQM icon
1644
Invesco NASDAQ 100 ETF
QQQM
$103B
$59K ﹤0.01%
400
– –
FV icon
1645
First Trust Dorsey Wright Focus 5 ETF
FV
$3.8B
$57K ﹤0.01%
1,235
+1
+0.1% +$47
ACES icon
1646
ALPS Clean Energy ETF
ACES
$124M
$56K ﹤0.01%
851
+150
+21% +$10.5K
PBW icon
1647
Invesco WilderHill Clean Energy ETF
PBW
$458M
$56K ﹤0.01%
731
-22
-3% -$1.8K
PHAS
1648
DELISTED
PhaseBio Pharmaceuticals, Inc. Common Stock
PHAS
$56K ﹤0.01%
18,000
+1,000
+6% +$3.34K
ADRE
1649
DELISTED
Invesco BLDRS Emerging Markets 50 ADR Index Fund
ADRE
$56K ﹤0.01%
1,150
– –
FREL icon
1650
Fidelity MSCI Real Estate Index ETF
FREL
$1.47B
$55K ﹤0.01%
1,822
-10
-0.5% -$317
64 65
66
67 68

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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.