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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
RNR icon
1276
RenaissanceRe
RNR
$13.3B
$355K ﹤0.01%
2,549
+36
+1% +$5.45K
LW icon
1277
Lamb Weston
LW
$7.43B
$352K ﹤0.01%
5,729
+949
+20% +$64.3K
MPT
1278
Medical Properties Trust
MPT
$2.47B
$351K ﹤0.01%
17,472
-94
-0.5% -$1.93K
S icon
1279
SentinelOne
S
$7.84B
$351K ﹤0.01%
6,550
+1,550
+31% +$85.1K
GOVT icon
1280
iShares US Treasury Bond ETF
GOVT
$43.8B
$350K ﹤0.01%
13,190
-1,098
-8% -$29.4K
SCHA icon
1281
Schwab U.S Small- Cap ETF
SCHA
$23.5B
$350K ﹤0.01%
13,968
+1,280
+10% +$32.5K
NBHC icon
1282
National Bank Holdings
NBHC
$1.94B
$348K ﹤0.01%
8,592
– –
IYC icon
1283
iShares US Consumer Discretionary ETF
IYC
$1.22B
$346K ﹤0.01%
4,471
– –
FDL icon
1284
First Trust Morningstar Dividend Leaders Index Fund
FDL
$7.96B
$345K ﹤0.01%
10,525
– –
HAIN icon
1285
Hain Celestial
HAIN
$55.6M
$345K ﹤0.01%
8,060
-840
-9% -$33.3K
AQUA
1286
DELISTED
Evoqua Water Technologies Corp. Common Stock
AQUA
$343K ﹤0.01%
9,125
+1,700
+23% +$61.4K
LMRK
1287
DELISTED
Landmark Infrastructure Partners LP Common Units
LMRK
$342K ﹤0.01%
20,900
– –
FLRN icon
1288
State Street SPDR Bloomberg Investment Grade Floating Rate ETF
FLRN
$2.97B
$341K ﹤0.01%
11,113
-5
-0% -$153
BDSX icon
1289
Biodesix
BDSX
$253M
$339K ﹤0.01%
2,064
-2,446
-54% -$464K
FUBO icon
1290
FuboTV Inc
FUBO
$295M
$339K ﹤0.01%
1,181
+34
+3% +$11.1K
PRGO icon
1291
Perrigo
PRGO
$1.74B
$338K ﹤0.01%
7,136
+1,101
+18% +$49K
VMW
1292
DELISTED
VMware, Inc
VMW
$337K ﹤0.01%
2,267
-134
-6% -$20.3K
AEF
1293
abrdn Emerging Markets Equity Income Fund
AEF
$384M
$336K ﹤0.01%
40,332
-982
-2% -$8.53K
PACB icon
1294
Pacific Biosciences
PACB
$351M
$335K ﹤0.01%
+13,109
New +$388K
MDP
1295
DELISTED
Meredith Corporation
MDP
$334K ﹤0.01%
6,000
-28
-0.5% -$1.22K
SIRI icon
1296
SiriusXM
SIRI
$9.47B
$333K ﹤0.01%
5,465
-778
-12% -$48.9K
SLAB icon
1297
Silicon Laboratories
SLAB
$7.29B
$333K ﹤0.01%
2,373
-82
-3% -$12.3K
TGTX icon
1298
TG Therapeutics
TGTX
$7.38B
$333K ﹤0.01%
10,000
-1,250
-11% -$38.7K
XMMO icon
1299
Invesco S&P MidCap Momentum ETF
XMMO
$7.64B
$332K ﹤0.01%
3,950
– –
FUN icon
1300
Cedar Fair
FUN
$1.73B
$331K ﹤0.01%
7,132
-35
-0.5% -$1.54K
50 51
52
53 54

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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.