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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
+771.69%
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
BABA icon
1
Alibaba
BABA
$305B
$1.2B 4.79%
5,671,743
-319,588
-5% -$60M
TSM icon
2
TSMC
TSM
$2.11T
$1.01B 4.01%
17,339,543
+17,238
+0.1% +$914K
SPY icon
3
State Street SPDR S&P 500 ETF Trust
SPY
$806B
$723M 2.88%
2,247,300
-210,000
-9% -$64.7M
BWXT icon
4
BWX Technologies
BWXT
$15.9B
$457M 1.82%
7,357,982
+210,634
+3% +$12.5M
BN icon
5
Brookfield
BN
$107B
$414M 1.65%
20,075,675
-81,372
-0.4% -$1.62M
EHC icon
6
Encompass Health
EHC
$11.2B
$344M 1.37%
6,245,130
+399,259
+7% +$21.7M
TREX icon
7
Trex
TREX
$4.66B
$340M 1.36%
7,568,302
+240,256
+3% +$10.6M
BURL icon
8
Burlington
BURL
$23.2B
$335M 1.33%
1,466,992
-42,867
-3% -$8.96M
EEFT icon
9
Euronet Worldwide
EEFT
$2.8B
$326M 1.3%
2,067,200
+85,725
+4% +$12.9M
HZNP
10
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
$321M 1.28%
8,855,490
+515,049
+6% +$15.8M
CNI icon
11
Canadian National Railway
CNI
$76.1B
$302M 1.21%
3,342,955
-10,476
-0.3% -$941K
NTES icon
12
NetEase
NTES
$84.2B
$296M 1.18%
4,826,965
-416,875
-8% -$24.4M
LW icon
13
Lamb Weston
LW
$7.29B
$295M 1.18%
3,430,368
+36,370
+1% +$2.93M
LYV icon
14
Live Nation Entertainment
LYV
$42.3B
$292M 1.16%
4,088,371
+154,055
+4% +$10.4M
MLM icon
15
Martin Marietta Materials
MLM
$32.6B
$290M 1.16%
1,038,447
+22,837
+2% +$6.09M
LOPE icon
16
Grand Canyon Education
LOPE
$3.93B
$275M 1.09%
2,867,187
+114,271
+4% +$10.5M
PODD icon
17
Insulet
PODD
$11.8B
$274M 1.09%
1,601,024
-39,386
-2% -$6.56M
TDY icon
18
Teledyne Technologies
TDY
$31.1B
$271M 1.08%
782,519
+14,788
+2% +$4.97M
P
19
Everpure Inc
P
$26.6B
$266M 1.06%
15,543,680
+2,648,556
+21% +$46.8M
TFX icon
20
Teleflex
TFX
$6.18B
$259M 1.03%
686,983
+6,652
+1% +$2.29M
AMZN icon
21
Amazon
AMZN
$3.06T
$241M 0.96%
2,611,460
+289,940
+12% +$25.7M
MTN icon
22
Vail Resorts
MTN
$5.32B
$240M 0.96%
1,000,627
+10,104
+1% +$2.39M
TD icon
23
Toronto Dominion Bank
TD
$200B
$237M 0.94%
4,224,733
-34,045
-0.8% -$1.93M
ZD icon
24
Ziff Davis
ZD
$1.99B
$232M 0.92%
2,841,599
+45,619
+2% +$3.77M
GOOGL icon
25
Alphabet (Google) Class A
GOOGL
$4.57T
$228M 0.91%
3,408,980
+294,560
+9% +$19M
1
2 3 4 5

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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.