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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
EWZ icon
151
iShares MSCI Brazil ETF
EWZ
$8.6B
$31.5M 0.13%
664,500
-523,900
-44% -$22.9M
INDA icon
152
iShares MSCI India ETF
INDA
$6.6B
$31M 0.12%
+881,050
New +$30.2M
LHCG
153
DELISTED
LHC Group LLC
LHCG
$30.4M 0.12%
220,731
+39,828
+22% +$4.96M
ANET icon
154
Arista Networks
ANET
$248B
$30.2M 0.12%
2,372,096
+1,570,640
+196% +$20.7M
IDXX icon
155
Idexx Laboratories
IDXX
$46.6B
$30.1M 0.12%
115,122
-42,745
-27% -$11.3M
AON icon
156
Aon
AON
$75.9B
$29.8M 0.12%
142,999
+27,054
+23% +$5.36M
XP icon
157
XP
XP
$8.03B
$29.6M 0.12%
+767,137
New +$28.8M
QGEN icon
158
Qiagen
QGEN
$8.84B
$29.4M 0.12%
819,420
-962,365
-54% -$35.8M
PLOW icon
159
Douglas Dynamics
PLOW
$975M
$29.2M 0.12%
531,565
-25,652
-5% -$1.3M
TTWO icon
160
Take-Two Interactive
TTWO
$46.7B
$29.1M 0.12%
238,066
-22,510
-9% -$2.74M
GPN icon
161
Global Payments
GPN
$22.8B
$28.8M 0.11%
157,905
-13,630
-8% -$2.34M
CDXS icon
162
Codexis
CDXS
$161M
$27.7M 0.11%
1,734,342
+593,047
+52% +$8.78M
STNE icon
163
StoneCo
STNE
$2.47B
$27.6M 0.11%
692,354
-20,401
-3% -$746K
LXFR icon
164
Luxfer Holdings
LXFR
$458M
$27.6M 0.11%
1,489,042
+211,265
+17% +$3.64M
MMSI icon
165
Merit Medical Systems
MMSI
$5.46B
$26.6M 0.11%
+852,927
New +$24.4M
GBCI icon
166
Glacier Bancorp
GBCI
$6.38B
$26.5M 0.11%
577,123
+13,081
+2% +$565K
VRRM icon
167
Verra Mobility
VRRM
$723M
$26.3M 0.1%
1,878,740
+232,528
+14% +$3.34M
JBTM
168
JBT Marel
JBTM
$6.35B
$26.2M 0.1%
232,809
+41,251
+22% +$4.42M
AJG icon
169
Arthur J. Gallagher & Co
AJG
$65.4B
$26.2M 0.1%
275,055
-38,765
-12% -$3.55M
VMC icon
170
Vulcan Materials
VMC
$36.8B
$25.9M 0.1%
180,102
-15,623
-8% -$2.24M
PLD icon
171
Prologis
PLD
$133B
$25.6M 0.1%
287,520
+3,844
+1% +$341K
TRHC
172
DELISTED
Tabula Rasa HealthCare, Inc. Common Stock
TRHC
$25.6M 0.1%
526,124
+225,439
+75% +$10.6M
MMS icon
173
Maximus
MMS
$2.88B
$25.6M 0.1%
344,286
-74,668
-18% -$5.61M
AGYS icon
174
Agilysys
AGYS
$3.04B
$25.3M 0.1%
996,171
+126,107
+14% +$3.19M
BLBD icon
175
Blue Bird Corp
BLBD
$2.09B
$25.1M 0.1%
1,097,314
-225,206
-17% -$4.5M
5 6
7
8 9

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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.