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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
+9.46%
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
$25.1B
AUM Growth
+$1.71B
Cap. Flow
-$116M
Cap. Flow %
-0.46%
Top 10 Hldgs %
21.8%
Holding
389
New
32
Increased
133
Reduced
187
Closed
33

Top Buys

Rank Stock Value
1
ZNGA
ZYNGA INC. CL A COMMON
ZNGA
+$140M
2
OLLI icon
Ollie's Bargain Outlet
OLLI
+$120M
3
PLNT icon
Planet Fitness
PLNT
+$101M
4
ETSY icon
Etsy
ETSY
+$98.5M
5
IRTC icon
iRhythm Holdings
IRTC
+$83.7M

Top Sells

Rank Stock Value
1
CVSA
Covista Inc
CVSA
+$163M
2
EWBC icon
East-West Bancorp
EWBC
+$155M
3
MIDD icon
Middleby
MIDD
+$155M
4
IAA
IAA, Inc. Common Stock
IAA
+$124M
5
CBOE icon
Cboe Global Markets
CBOE
+$98.6M

Sector Composition

Rank Sector Weight
1 Technology 22.67%
2 Healthcare 14.68%
3 Consumer Discretionary 14.55%
4 Industrials 12.39%
5 Financials 11.76%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ABMD
76
DELISTED
Abiomed Inc
ABMD
$110M 0.44%
644,837
-103,970
-14% -$19.3M
ZTS icon
77
Zoetis
ZTS
$31B
$109M 0.44%
826,296
-11,052
-1% -$1.37M
GLOB icon
78
Globant
GLOB
$1.69B
$109M 0.43%
1,025,701
-107,037
-9% -$10.7M
GKOS icon
79
Glaukos
GKOS
$10.8B
$108M 0.43%
1,976,525
-416,534
-17% -$25.3M
FIS icon
80
Fidelity National Information Services
FIS
$22.2B
$107M 0.43%
769,285
+39,039
+5% +$5.23M
PYPL icon
81
PayPal
PYPL
$50.5B
$106M 0.42%
981,703
+96,318
+11% +$10M
ROG icon
82
Rogers Corp
ROG
$2.41B
$106M 0.42%
848,901
+29,960
+4% +$4.05M
ICE icon
83
Intercontinental Exchange
ICE
$84.3B
$103M 0.41%
1,113,771
-73,355
-6% -$6.81M
NATI
84
DELISTED
National Instruments Corp
NATI
$101M 0.4%
2,389,605
+70,403
+3% +$2.94M
TAL icon
85
TAL Education Group
TAL
$6.79B
$101M 0.4%
2,098,956
+793,482
+61% +$34.1M
VCYT icon
86
Veracyte
VCYT
$3.73B
$99.7M 0.4%
3,569,401
+641,706
+22% +$16.6M
EL icon
87
Estee Lauder
EL
$31.8B
$98.2M 0.39%
475,372
+27,591
+6% +$5.36M
ETSY icon
88
Etsy
ETSY
$7.34B
$97M 0.39%
2,189,168
+2,067,317
+1,697% +$98.5M
AMD icon
89
Advanced Micro Devices
AMD
$771B
$94.3M 0.38%
2,056,392
+1,136,664
+124% +$41.8M
ARES icon
90
Ares Management
ARES
$32.4B
$92M 0.37%
+2,577,871
New +$80.1M
AXTA icon
91
Axalta
AXTA
$7.97B
$91.5M 0.36%
3,008,915
+66,242
+2% +$1.95M
GNRC icon
92
Generac Holdings
GNRC
$12.6B
$90M 0.36%
+894,946
New +$83.3M
NOVT icon
93
Novanta
NOVT
$6.28B
$90M 0.36%
1,017,254
+119,851
+13% +$10.3M
INSP icon
94
Inspire Medical Systems
INSP
$1.74B
$88.4M 0.35%
1,190,766
+72,666
+6% +$4.67M
ICLR icon
95
Icon
ICLR
$12.9B
$86.2M 0.34%
500,384
-13,225
-3% -$2.04M
W icon
96
Wayfair
W
$14.2B
$86.2M 0.34%
953,542
-124,941
-12% -$11.7M
IRTC icon
97
iRhythm Holdings
IRTC
$4.04B
$84M 0.33%
+1,234,054
New +$83.7M
PE
98
DELISTED
PARSLEY ENERGY INC
PE
$81.9M 0.33%
4,332,806
+430,353
+11% +$7.1M
PLAN
99
DELISTED
Anaplan, Inc.
PLAN
$81.7M 0.33%
+1,558,856
New +$77.3M
CRM icon
100
Salesforce
CRM
$161B
$79.5M 0.32%
488,642
+5,717
+1% +$896K
2 3
4
5 6

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William Blair Investment Management's Q4 2019 Portfolio in Review

As of Q4 2019, William Blair Investment Management held 389 positions worth $25.1B, up 7.3% from $23.4B the previous quarter. Its ten largest holdings account for 22% of the portfolio.

William Blair Investment Management's Q4 2019 filing shows 32 new, 133 increased, 187 reduced and 33 closed positions. Its largest new stake was Ollie's Bargain Outlet: 1,892,527 shares worth $124M. The largest sale was Covista Inc, an estimated $163M.

By sector, the portfolio is most concentrated in Technology at 23% of assets, up from 20% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • William Blair Investment Management's largest Q4 2019 buy was Ollie's Bargain Outlet: 1,892,527 shares worth $124M.
  • William Blair Investment Management added most to ZYNGA INC. CL A COMMON in Q4 2019, an estimated $140M increase.
  • William Blair Investment Management's biggest Q4 2019 reduction was Middleby, cutting an estimated $155M.
  • William Blair Investment Management fully exited Covista Inc in Q4 2019, selling an estimated $163M.
  • William Blair Investment Management's ten largest holdings make up 22% of its $25.1B portfolio in Q4 2019.
  • William Blair Investment Management opened 32 new positions and closed 33 in Q4 2019.
  • William Blair Investment Management's portfolio value rose 7.3% quarter-over-quarter to $25.1B.

Based on William Blair Investment Management's 13F filing for Q4 2019, filed 12 Feb 2020.