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William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $33.3B
1-Year Est. Return 44.76%
This Fund
S&P 500
This Quarter Est. Return
+2.16%
1 Year Est. Return
+44.76%
3 Year Est. Return
+140.8%
5 Year Est. Return
+166.51%
10 Year Est. Return
+978.6%
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
ABMD
26
DELISTED
Abiomed Inc
ABMD
$313M 0.88%
962,347
+29,774
+3% +$10.1M
LULU icon
27
lululemon athletica
LULU
$13.9B
$301M 0.85%
742,954
-3,378
-0.5% -$1.35M
BFAM icon
28
Bright Horizons
BFAM
$3.77B
$292M 0.82%
2,097,165
-34,790
-2% -$5.11M
MLM icon
29
Martin Marietta Materials
MLM
$32.6B
$290M 0.82%
848,812
-119,200
-12% -$43.4M
MA icon
30
Mastercard
MA
$488B
$284M 0.8%
816,470
+45,451
+6% +$16.5M
LYV icon
31
Live Nation Entertainment
LYV
$43B
$282M 0.8%
3,094,573
+14,910
+0.5% +$1.26M
GLOB icon
32
Globant
GLOB
$1.64B
$278M 0.78%
988,687
+70,468
+8% +$19.3M
RYAAY icon
33
Ryanair
RYAAY
$30.9B
$266M 0.75%
6,034,188
+399,805
+7% +$17.3M
ACHC icon
34
Acadia Healthcare
ACHC
$2.97B
$264M 0.74%
4,136,902
-589,894
-12% -$37.2M
ARES icon
35
Ares Management
ARES
$31.7B
$254M 0.72%
3,436,372
+153,518
+5% +$11.1M
DEN
36
DELISTED
Denbury Inc.
DEN
$247M 0.7%
3,509,349
-210,249
-6% -$14.5M
HQY icon
37
HealthEquity
HQY
$8.82B
$244M 0.69%
3,769,799
+42,186
+1% +$2.93M
GWRE icon
38
Guidewire Software
GWRE
$14.4B
$243M 0.69%
2,043,914
-29,808
-1% -$3.44M
MMSI icon
39
Merit Medical Systems
MMSI
$5.4B
$243M 0.69%
3,382,662
-54,656
-2% -$3.71M
FOXF icon
40
Fox Factory Holding Corp
FOXF
$892M
$240M 0.68%
1,659,616
+33,907
+2% +$5.21M
ICLR icon
41
Icon
ICLR
$12.9B
$239M 0.68%
913,720
+280,653
+44% +$68.2M
VIRT icon
42
Virtu Financial
VIRT
$4.99B
$238M 0.67%
9,732,667
+2,710,178
+39% +$68.9M
WH icon
43
Wyndham Hotels & Resorts
WH
$5.49B
$236M 0.67%
3,056,427
-34,043
-1% -$2.44M
WAL icon
44
Western Alliance Bancorporation
WAL
$8.93B
$236M 0.67%
2,166,855
-57,735
-3% -$5.62M
EHC icon
45
Encompass Health
EHC
$12.3B
$232M 0.66%
3,893,175
-1,081,237
-22% -$68M
VRNS icon
46
Varonis Systems
VRNS
$4.84B
$221M 0.62%
3,625,705
-42,067
-1% -$2.64M
PYPL icon
47
PayPal
PYPL
$50B
$220M 0.62%
844,451
+4,914
+0.6% +$1.39M
PODD icon
48
Insulet
PODD
$9.97B
$218M 0.62%
767,661
-11,225
-1% -$3.2M
EYE icon
49
National Vision
EYE
$1.65B
$218M 0.61%
3,833,190
-33,359
-0.9% -$1.84M
BBBY
50
Bed Bath & Beyond
BBBY
$409M
$217M 0.61%
+3,069,659
New +$213M
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.