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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
CWST icon
176
Casella Waste Systems
CWST
$5.89B
$24.9M 0.1%
540,210
+126,594
+31% +$5.58M
CW icon
177
Curtiss-Wright
CW
$26.1B
$24.4M 0.1%
173,427
-70,335
-29% -$9.53M
KN icon
178
Knowles
KN
$3.29B
$24.3M 0.1%
1,146,570
+326,438
+40% +$7.01M
BRC icon
179
Brady Corp
BRC
$4.48B
$24.2M 0.1%
421,833
-171,254
-29% -$9.6M
QNST icon
180
QuinStreet
QNST
$1.2B
$23.8M 0.09%
1,553,215
+524,604
+51% +$7.48M
XLP icon
181
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.6B
$23.7M 0.09%
376,800
-38,200
-9% -$2.35M
INTU icon
182
Intuit
INTU
$92B
$23.5M 0.09%
89,832
-687
-0.8% -$180K
WAL icon
183
Western Alliance Bancorporation
WAL
$8.89B
$23.4M 0.09%
410,781
-59,372
-13% -$3.03M
ILMN icon
184
Illumina
ILMN
$29.1B
$23.1M 0.09%
71,736
+1,645
+2% +$499K
SBAC icon
185
SBA Communications
SBAC
$19.3B
$23M 0.09%
95,623
-8,160
-8% -$1.93M
SE icon
186
Sea Limited
SE
$80.5B
$22.5M 0.09%
560,605
-521,350
-48% -$17.6M
OEC icon
187
Orion
OEC
$377M
$22.4M 0.09%
1,163,192
+224,164
+24% +$4.05M
PAGS icon
188
PagSeguro Digital
PAGS
$2.48B
$21.8M 0.09%
638,770
-18,804
-3% -$677K
COR
189
DELISTED
Coresite Realty Corporation
COR
$21.8M 0.09%
194,100
+32,943
+20% +$3.81M
CRI icon
190
Carter's
CRI
$1.46B
$21.5M 0.09%
197,015
-112,938
-36% -$11.4M
HR
191
DELISTED
Healthcare Realty Trust Incorporated
HR
$21.4M 0.09%
642,209
-162,304
-20% -$5.38M
CNMD icon
192
CONMED
CNMD
$1.48B
$21.2M 0.08%
189,716
-77,244
-29% -$8.23M
WNS
193
DELISTED
WNS Holdings
WNS
$21M 0.08%
317,368
+27,787
+10% +$1.73M
WTS icon
194
Watts Water Technologies
WTS
$12.8B
$21M 0.08%
210,364
-86,158
-29% -$8.17M
DIN icon
195
Dine Brands
DIN
$454M
$20.9M 0.08%
249,874
+49,309
+25% +$3.83M
SIVB
196
DELISTED
SVB Financial Group
SIVB
$20.6M 0.08%
82,043
-7,055
-8% -$1.6M
OSW icon
197
OneSpaWorld
OSW
$2.64B
$20.4M 0.08%
1,212,480
+195,240
+19% +$3.07M
LAD icon
198
Lithia Motors
LAD
$8.32B
$20M 0.08%
136,316
-4,799
-3% -$721K
WLDN icon
199
Willdan Group
WLDN
$1.28B
$19.9M 0.08%
626,154
+364,718
+140% +$11.6M
LFUS icon
200
Littelfuse
LFUS
$11.5B
$19.8M 0.08%
103,307
+23,712
+30% +$4.35M
6 7
8
9 10

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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.