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William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $30.3B
1-Year Est. Return 33.75%
This Fund
S&P 500
This Quarter Est. Return
+13.65%
1 Year Est. Return
+33.75%
3 Year Est. Return
+108.55%
5 Year Est. Return
+126.9%
10 Year Est. Return
+788.31%
AUM
$25.7B
AUM Growth
+$1.1B
Cap. Flow
-$1.58B
Cap. Flow %
-6.14%
Top 10 Hldgs %
18.53%
Holding
367
New
26
Increased
146
Reduced
166
Closed
24

Top Buys

Rank Stock Value
1
AXON
Axon Enterprise
AXON
+$151M
2
RAMP icon
LiveRamp
RAMP
+$124M
3
GWRE icon
Guidewire Software
GWRE
+$115M
4
SE icon
Sea Limited
SE
+$102M
5
BLDR icon
Builders FirstSource
BLDR
+$89.9M

Top Sells

Rank Stock Value
1
NTES icon
NetEase
NTES
+$506M
2
CPRT icon
Copart
CPRT
+$136M
3
TSM icon
TSMC
TSM
+$125M
4
WEX icon
WEX
WEX
+$124M
5
BN icon
Brookfield
BN
+$123M

Sector Composition

Rank Sector Weight
1 Technology 26.05%
2 Healthcare 18.61%
3 Consumer Discretionary 13.78%
4 Industrials 13.27%
5 Financials 7.61%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TSM icon
1
TSMC
TSM
$2.18T
$1.08B 4.21%
13,330,953
-1,642,237
-11% -$125M
SPY icon
2
State Street SPDR S&P 500 ETF Trust
SPY
$823B
$621M 2.42%
1,855,600
-98,100
-5% -$32.5M
HZNP
3
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
$455M 1.77%
5,853,222
-1,766,356
-23% -$122M
AMZN icon
4
Amazon
AMZN
$2.96T
$428M 1.67%
2,718,940
-362,320
-12% -$57.1M
BWXT icon
5
BWX Technologies
BWXT
$15.6B
$423M 1.65%
7,512,232
-89,914
-1% -$5.04M
MELI icon
6
Mercado Libre
MELI
$92.3B
$373M 1.45%
344,704
-4,492
-1% -$4.87M
TAL icon
7
TAL Education Group
TAL
$6.87B
$362M 1.41%
4,761,225
-30,758
-0.6% -$2.32M
CNI icon
8
Canadian National Railway
CNI
$76.6B
$357M 1.39%
3,358,425
-61,041
-2% -$6.13M
SE icon
9
Sea Limited
SE
$69.5B
$330M 1.29%
2,142,572
+756,052
+55% +$102M
LOPE icon
10
Grand Canyon Education
LOPE
$3.98B
$324M 1.26%
4,055,191
-48,961
-1% -$4.43M
MSFT icon
11
Microsoft
MSFT
$3.71T
$309M 1.2%
1,468,945
-25,584
-2% -$5.37M
EHC icon
12
Encompass Health
EHC
$12.4B
$304M 1.18%
5,876,671
+140,705
+2% +$7.22M
NICE icon
13
Nice
NICE
$5.97B
$297M 1.16%
1,309,033
-179,583
-12% -$38.2M
LULU icon
14
lululemon athletica
LULU
$14.6B
$278M 1.08%
843,570
-39,102
-4% -$13M
BJ icon
15
BJs Wholesale Club
BJ
$12.3B
$277M 1.08%
6,675,352
-469,488
-7% -$19.4M
MLM icon
16
Martin Marietta Materials
MLM
$33B
$277M 1.08%
1,176,415
-17,394
-1% -$3.76M
NBIS
17
Nebius Group N.V.
NBIS
$47.7B
$275M 1.07%
4,214,363
-422,067
-9% -$25.1M
TREX icon
18
Trex
TREX
$5.01B
$275M 1.07%
3,838,727
-213,023
-5% -$14.7M
GOOGL icon
19
Alphabet (Google) Class A
GOOGL
$4.33T
$262M 1.02%
3,578,980
-328,180
-8% -$25M
IRTC icon
20
iRhythm Holdings
IRTC
$4.2B
$255M 0.99%
1,071,182
-354,848
-25% -$62.8M
P
21
Everpure Inc
P
$29.9B
$248M 0.97%
16,133,062
-90,901
-0.6% -$1.49M
RBA icon
22
RB Global
RBA
$17.5B
$248M 0.96%
4,177,371
-113,797
-3% -$6.01M
SEDG icon
23
SolarEdge
SEDG
$1.95B
$246M 0.96%
1,032,878
-364,061
-26% -$70M
ETSY icon
24
Etsy
ETSY
$7.85B
$246M 0.96%
2,021,300
-207,640
-9% -$24.3M
CCK icon
25
Crown Holdings
CCK
$13.1B
$241M 0.94%
3,141,563
-74,130
-2% -$5.42M
1
2 3 4 5

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William Blair Investment Management's Q3 2020 Portfolio in Review

As of Q3 2020, William Blair Investment Management held 367 positions worth $25.7B, up 4.5% from $24.6B the previous quarter. Its ten largest holdings account for 19% of the portfolio.

William Blair Investment Management withdrew a net $1.58B in Q3 2020, closing 24 positions and reducing 166 holdings. Its most notable exit was Planet Fitness, an estimated $114M position sold in full.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 26% a quarter earlier, followed by Healthcare and Consumer Discretionary.

Against the trend, William Blair Investment Management opened a new position in Axon Enterprise worth $157M.

  • William Blair Investment Management's largest Q3 2020 buy was Axon Enterprise: 1,734,820 shares worth $157M.
  • William Blair Investment Management added most to LiveRamp in Q3 2020, an estimated $124M increase.
  • William Blair Investment Management's biggest Q3 2020 reduction was NetEase, cutting an estimated $506M.
  • William Blair Investment Management fully exited Planet Fitness in Q3 2020, selling an estimated $114M.
  • William Blair Investment Management's ten largest holdings make up 19% of its $25.7B portfolio in Q3 2020.
  • William Blair Investment Management opened 26 new positions and closed 24 in Q3 2020.
  • William Blair Investment Management's portfolio value rose 4.5% quarter-over-quarter to $25.7B.

Based on William Blair Investment Management's 13F filing for Q3 2020, filed 6 Nov 2020.