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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
MTTR
1251
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
$384K ﹤0.01%
20,300
+200
+1% +$3.24K
UPST icon
1252
Upstart Holdings
UPST
$2.95B
$383K ﹤0.01%
+1,211
New +$239K
FVRR icon
1253
Fiverr
FVRR
$322M
$382K ﹤0.01%
2,091
+51
+3% +$10.3K
JEPI icon
1254
JPMorgan Equity Premium Income ETF
JEPI
$46.2B
$382K ﹤0.01%
6,402
+5,377
+525% +$331K
CASY icon
1255
Casey's General Stores
CASY
$31.5B
$381K ﹤0.01%
2,023
– –
STEM icon
1256
Stem
STEM
$54.9M
$380K ﹤0.01%
796
+50
+7% +$26.3K
FWONK icon
1257
Liberty Media Series C
FWONK
$26B
$378K ﹤0.01%
7,596
-50
-0.7% -$2.37K
MAN icon
1258
ManpowerGroup
MAN
$2.69B
$378K ﹤0.01%
3,493
+142
+4% +$16.6K
VSS icon
1259
Vanguard FTSE All-World ex-US Small-Cap Index Fund
VSS
$12B
$378K ﹤0.01%
2,826
+66
+2% +$9.09K
ATAXZ
1260
DELISTED
AMERICA FIRST TAX EXEMT INV LP
ATAXZ
$376K ﹤0.01%
+63,090
New +$376K
AGCO icon
1261
AGCO
AGCO
$6.98B
$375K ﹤0.01%
3,061
+1,189
+64% +$156K
SCHL icon
1262
Scholastic
SCHL
$783M
$374K ﹤0.01%
10,486
-200
-2% -$6.84K
BEPC icon
1263
Brookfield Renewable
BEPC
$6.65B
$372K ﹤0.01%
9,596
– –
USO icon
1264
United States Oil Fund
USO
$1.76B
$371K ﹤0.01%
7,063
-8
-0.1% -$391
HIG icon
1265
Hartford Financial Services
HIG
$37.7B
$368K ﹤0.01%
5,234
-212
-4% -$14K
ATEC icon
1266
Alphatec Holdings
ATEC
$1.5B
$367K ﹤0.01%
30,075
+10,000
+50% +$139K
RCKT icon
1267
Rocket Pharmaceuticals
RCKT
$370M
$366K ﹤0.01%
12,251
-350
-3% -$12.7K
BBCA icon
1268
JPMorgan BetaBuilders Canada ETF
BBCA
$11.4B
$365K ﹤0.01%
5,802
-793
-12% -$51.1K
GIGB icon
1269
Goldman Sachs Access Investment Grade Corporate Bond ETF
GIGB
$974M
$365K ﹤0.01%
6,719
– –
PVH icon
1270
PVH
PVH
$3.76B
$364K ﹤0.01%
3,544
+125
+4% +$13.5K
ABM icon
1271
ABM Industries
ABM
$2.82B
$360K ﹤0.01%
+8,000
New +$370K
ALLE icon
1272
Allegion
ALLE
$14.1B
$360K ﹤0.01%
2,725
+41
+2% +$5.7K
BV icon
1273
BrightView Holdings
BV
$1.09B
$360K ﹤0.01%
+24,400
New +$372K
BOND icon
1274
PIMCO Active Bond Exchange-Traded Fund
BOND
$8.5B
$359K ﹤0.01%
3,248
+89
+3% +$9.92K
MRTN icon
1275
Marten Transport
MRTN
$1.24B
$358K ﹤0.01%
+22,800
New +$358K
49 50
51
52 53

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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.