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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
+5.95%
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
$26.2B
AUM Growth
+$458M
Cap. Flow
-$585M
Cap. Flow %
-2.23%
Top 10 Hldgs %
18.81%
Holding
469
New
42
Increased
160
Reduced
224
Closed
36

Sector Composition

Rank Sector Weight
1 Technology 14.91%
2 Financials 14.73%
3 Consumer Discretionary 14.13%
4 Industrials 13.07%
5 Healthcare 12.8%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake
Capital Flow
CABO icon
126
Cable One
CABO
$192M
$58.5M 0.22%
85,195
+3,029
+4% +$2.12M
APTV icon
127
Aptiv
APTV
$10.3B
$58.4M 0.22%
687,476
+319,821
+87% +$29M
MCD icon
128
McDonald's
MCD
$194B
$58.3M 0.22%
+372,781
New +$61.3M
TAL icon
129
TAL Education Group
TAL
$6.75B
$58.3M 0.22%
1,570,761
-1,627,723
-51% -$55.9M
SUPV
130
Grupo Supervielle
SUPV
$733M
$58.2M 0.22%
1,919,861
+276,479
+17% +$8.47M
GOOG icon
131
Alphabet (Google) Class C
GOOG
$4.19T
$57.4M 0.22%
1,113,000
-61,300
-5% -$3.38M
WIX icon
132
WIX.com
WIX
$2.79B
$57M 0.22%
716,493
-10,160
-1% -$713K
VMC icon
133
Vulcan Materials
VMC
$37.3B
$56.5M 0.22%
494,611
-22,720
-4% -$2.86M
RSX
134
DELISTED
VanEck Russia ETF
RSX
$56.2M 0.21%
2,469,700
-21,500
-0.9% -$494K
CNC icon
135
Centene
CNC
$32.1B
$55.5M 0.21%
1,039,418
-355,306
-25% -$18.5M
BA icon
136
Boeing
BA
$184B
$54.9M 0.21%
167,340
-59,127
-26% -$20M
HD icon
137
Home Depot
HD
$353B
$54.6M 0.21%
306,218
-253,568
-45% -$47.6M
FITB
138
Fifth Third Bancorp
FITB
$52.2B
$54.2M 0.21%
1,707,152
-40,027
-2% -$1.31M
GPN icon
139
Global Payments
GPN
$22.7B
$54.1M 0.21%
+484,897
New +$53.6M
AKAM icon
140
Akamai
AKAM
$16.8B
$53.9M 0.21%
+759,201
New +$51.7M
KMX icon
141
CarMax
KMX
$8.26B
$53.8M 0.21%
869,151
+43,093
+5% +$2.82M
IDXX icon
142
Idexx Laboratories
IDXX
$46.2B
$52.1M 0.2%
272,285
-456,440
-63% -$84.2M
TCOM icon
143
Trip.com Group
TCOM
$29.1B
$51.6M 0.2%
1,105,964
-527,107
-32% -$24.7M
PX
144
DELISTED
Praxair Inc
PX
$51.2M 0.2%
354,672
+130,999
+59% +$20.4M
MIK
145
DELISTED
Michaels Stores, Inc
MIK
$51.1M 0.2%
2,591,578
-3,114,163
-55% -$74.6M
INTU icon
146
Intuit
INTU
$92B
$50.3M 0.19%
290,425
-988
-0.3% -$166K
SYK icon
147
Stryker
SYK
$134B
$49.3M 0.19%
306,144
+96,759
+46% +$15.6M
XLU icon
148
State Street Utilities Select Sector SPDR ETF
XLU
$22.7B
$49M 0.19%
1,939,200
+189,400
+11% +$4.73M
MCHP icon
149
Microchip Technology
MCHP
$44B
$48.1M 0.18%
1,053,210
+22,360
+2% +$1.03M
XLF icon
150
State Street Financial Select Sector SPDR ETF
XLF
$59B
$46.6M 0.18%
1,691,950
-61,750
-4% -$1.78M

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William Blair Investment Management's Q1 2018 Portfolio in Review

As of Q1 2018, William Blair Investment Management held 469 positions worth $26.2B, up 1.8% from $25.7B the previous quarter. Its ten largest holdings account for 19% of the portfolio.

William Blair Investment Management's Q1 2018 filing shows 42 new, 160 increased, 224 reduced and 36 closed positions. Its largest new stake was Healthcare Services Group: 3,458,904 shares worth $150M. The largest sale was Maximus, an estimated $224M.

By sector, the portfolio is most concentrated in Technology at 15% of assets, up from 14% a quarter earlier, followed by Financials and Consumer Discretionary.

  • William Blair Investment Management's largest Q1 2018 buy was Healthcare Services Group: 3,458,904 shares worth $150M.
  • William Blair Investment Management added most to PARSLEY ENERGY INC in Q1 2018, an estimated $136M increase.
  • William Blair Investment Management's biggest Q1 2018 reduction was Canadian National Railway, cutting an estimated $212M.
  • William Blair Investment Management fully exited Maximus in Q1 2018, selling an estimated $224M.
  • William Blair Investment Management's ten largest holdings make up 19% of its $26.2B portfolio in Q1 2018.
  • William Blair Investment Management opened 42 new positions and closed 36 in Q1 2018.
  • William Blair Investment Management's portfolio value rose 1.8% quarter-over-quarter to $26.2B.

Based on William Blair Investment Management's 13F filing for Q1 2018, filed 14 May 2018.