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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
+2.16%
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
$35.5B
AUM Growth
+$3.59B
Cap. Flow
+$3.35B
Cap. Flow %
9.44%
Top 10 Hldgs %
14.72%
Holding
520
New
55
Increased
211
Reduced
159
Closed
89

Top Buys

Rank Stock Value
1
BBBY
Bed Bath & Beyond
BBBY
+$213M
2
SEDG icon
SolarEdge
SEDG
+$182M
3
CHE icon
Chemed
CHE
+$161M
4
PFGC icon
Performance Food Group
PFGC
+$140M
5
PACB icon
Pacific Biosciences
PACB
+$121M

Top Sells

Rank Stock Value
1
GNRC icon
Generac Holdings
GNRC
+$257M
2
AZPN
ASPEN TECHNOLOGY INC
AZPN
+$209M
3
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$205M
4
ZD icon
Ziff Davis
ZD
+$175M
5
BJ icon
BJs Wholesale Club
BJ
+$167M

Sector Composition

Rank Sector Weight
1 Technology 25.42%
2 Healthcare 19.29%
3 Consumer Discretionary 15.58%
4 Industrials 14.33%
5 Financials 8.5%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TSM icon
1
TSMC
TSM
$2.15T
$1.23B 3.47%
11,012,683
+177,950
+2% +$20.9M
MSFT icon
2
Microsoft
MSFT
$3.74T
$531M 1.5%
1,882,267
-80,538
-4% -$23.4M
SE icon
3
Sea Limited
SE
$69.2B
$511M 1.44%
1,603,559
+123,455
+8% +$37.9M
MELI icon
4
Mercado Libre
MELI
$93.5B
$504M 1.42%
300,376
+30,849
+11% +$53.4M
BLDR icon
5
Builders FirstSource
BLDR
$8.21B
$439M 1.24%
8,491,616
+67,619
+0.8% +$3.3M
CNI icon
6
Canadian National Railway
CNI
$76.5B
$418M 1.18%
3,614,349
-14,333
-0.4% -$1.58M
AMZN icon
7
Amazon
AMZN
$2.97T
$403M 1.14%
2,453,920
-97,120
-4% -$16.8M
DT icon
8
Dynatrace
DT
$14.5B
$399M 1.12%
5,616,900
-95,332
-2% -$6.25M
GOOGL icon
9
Alphabet (Google) Class A
GOOGL
$4.35T
$393M 1.11%
2,941,580
-235,240
-7% -$32M
BWXT icon
10
BWX Technologies
BWXT
$15.2B
$391M 1.1%
7,253,158
-102,233
-1% -$5.76M
CRL icon
11
Charles River Laboratories
CRL
$12.7B
$389M 1.1%
942,596
-35,882
-4% -$14.9M
P
12
Everpure Inc
P
$29.2B
$389M 1.1%
15,458,782
-248,011
-2% -$5.48M
AZTA icon
13
Azenta
AZTA
$1.44B
$386M 1.09%
3,767,076
-44,981
-1% -$4.03M
NICE icon
14
Nice
NICE
$5.73B
$382M 1.08%
1,346,033
+17,524
+1% +$4.86M
SPY icon
15
State Street SPDR S&P 500 ETF Trust
SPY
$821B
$358M 1.01%
835,250
-464,610
-36% -$205M
HZNP
16
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
$341M 0.96%
3,117,368
-1,276,319
-29% -$132M
CCK icon
17
Crown Holdings
CCK
$13.1B
$339M 0.96%
3,360,442
-41,620
-1% -$4.37M
NBIS
18
Nebius Group N.V.
NBIS
$47.3B
$337M 0.95%
4,224,029
+88,257
+2% +$6.43M
AXON
19
Axon Enterprise
AXON
$43.9B
$329M 0.93%
1,879,180
-47,221
-2% -$8.58M
BCO icon
20
Brink's
BCO
$4.67B
$325M 0.92%
5,135,768
-117,469
-2% -$8.83M
TEAM icon
21
Atlassian
TEAM
$38.1B
$323M 0.91%
823,981
-3,975
-0.5% -$1.33M
TREX icon
22
Trex
TREX
$5.14B
$321M 0.91%
3,153,468
+19,332
+0.6% +$2.02M
EEFT icon
23
Euronet Worldwide
EEFT
$2.7B
$320M 0.9%
2,514,888
-26,128
-1% -$3.47M
CCJ icon
24
Cameco
CCJ
$41.6B
$318M 0.9%
14,624,529
-790,045
-5% -$14.9M
TECH icon
25
Bio-Techne
TECH
$11.2B
$317M 0.89%
2,615,376
-108,540
-4% -$13.2M
1
2 3 4 5

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William Blair Investment Management's Q3 2021 Portfolio in Review

As of Q3 2021, William Blair Investment Management held 520 positions worth $35.5B, up 11% from $31.9B the previous quarter. Its ten largest holdings account for 15% of the portfolio.

William Blair Investment Management deployed $3.35B of net new capital in Q3 2021, opening 55 new positions and adding to 211 existing holdings. Its largest new stake was Bed Bath & Beyond: 3,069,659 shares worth $217M.

By sector, the portfolio is most concentrated in Technology at 25% of assets, down from 26% a quarter earlier, followed by Healthcare and Consumer Discretionary.

On the sell side, the largest reduction was Generac Holdings, an estimated $257M trimmed.

  • William Blair Investment Management's largest Q3 2021 buy was Bed Bath & Beyond: 3,069,659 shares worth $217M.
  • William Blair Investment Management added most to Performance Food Group in Q3 2021, an estimated $140M increase.
  • William Blair Investment Management's biggest Q3 2021 reduction was Generac Holdings, cutting an estimated $257M.
  • William Blair Investment Management fully exited ASPEN TECHNOLOGY INC in Q3 2021, selling an estimated $209M.
  • William Blair Investment Management's ten largest holdings make up 15% of its $35.5B portfolio in Q3 2021.
  • William Blair Investment Management opened 55 new positions and closed 89 in Q3 2021.
  • William Blair Investment Management's portfolio value rose 11% quarter-over-quarter to $35.5B.

Based on William Blair Investment Management's 13F filing for Q3 2021, filed 10 Nov 2021.