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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
+19.2%
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
$23.8B
AUM Growth
+$3.63B
Cap. Flow
+$288M
Cap. Flow %
1.21%
Top 10 Hldgs %
20.04%
Holding
441
New
37
Increased
142
Reduced
223
Closed
35

Top Buys

Rank Stock Value
1
CHKP icon
Check Point Software Technologies
CHKP
+$181M
2
BABA icon
Alibaba
BABA
+$124M
3
EWBC icon
East-West Bancorp
EWBC
+$109M
4
STE icon
Steris
STE
+$94.6M
5
BURL icon
Burlington
BURL
+$87.9M

Top Sells

Rank Stock Value
1
SIX
Six Flags Entertainment Corp.
SIX
+$151M
2
FTNT icon
Fortinet
FTNT
+$108M
3
SU icon
Suncor Energy
SU
+$77.7M
4
WST icon
West Pharmaceutical
WST
+$73.5M
5
WW
WW International
WW
+$59M

Sector Composition

Rank Sector Weight
1 Technology 17.21%
2 Consumer Discretionary 14.5%
3 Healthcare 14.2%
4 Industrials 13.82%
5 Financials 13.22%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
PTLA
51
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
$144M 0.61%
4,154,870
+1,222,057
+42% +$35.3M
UNH icon
52
UnitedHealth
UNH
$366B
$142M 0.6%
573,035
+16,408
+3% +$4.18M
GWRE icon
53
Guidewire Software
GWRE
$14.7B
$141M 0.59%
1,448,946
-57,287
-4% -$5.12M
LW icon
54
Lamb Weston
LW
$7.24B
$140M 0.59%
1,866,540
+805,966
+76% +$57.1M
HCSG icon
55
Healthcare Services Group
HCSG
$1.45B
$139M 0.58%
4,203,079
+34,862
+0.8% +$1.34M
MA icon
56
Mastercard
MA
$493B
$136M 0.57%
576,436
+5,997
+1% +$1.29M
NICE icon
57
Nice
NICE
$5.97B
$136M 0.57%
1,106,946
+3,177
+0.3% +$358K
MSFT icon
58
Microsoft
MSFT
$3.74T
$132M 0.55%
1,117,106
-21,476
-2% -$2.34M
SABR icon
59
Sabre
SABR
$799M
$131M 0.55%
6,107,374
+168,667
+3% +$3.74M
GWR
60
DELISTED
Genesee & Wyoming Inc.
GWR
$129M 0.54%
1,480,785
-369
-0% -$29.9K
FSV icon
61
FirstService
FSV
$6.32B
$129M 0.54%
1,441,060
+2,750
+0.2% +$226K
EXAS
62
DELISTED
Exact Sciences
EXAS
$123M 0.52%
1,417,867
-652,565
-32% -$55.5M
RBA icon
63
RB Global
RBA
$16.7B
$121M 0.51%
3,558,623
+73,089
+2% +$2.57M
TWOU
64
DELISTED
2U Inc
TWOU
$114M 0.48%
53,533
+361
+0.7% +$682K
DXCM icon
65
DexCom
DXCM
$33.7B
$112M 0.47%
3,758,628
-1,263,860
-25% -$44.4M
LGND icon
66
Ligand Pharmaceuticals
LGND
$5.76B
$112M 0.47%
1,422,890
-143,696
-9% -$10.9M
W icon
67
Wayfair
W
$14.2B
$111M 0.47%
750,968
+624,622
+494% +$81.5M
NBIS
68
Nebius Group N.V.
NBIS
$48.5B
$110M 0.46%
3,212,410
-26,186
-0.8% -$868K
RTN
69
DELISTED
Raytheon Company
RTN
$104M 0.44%
571,414
+13,138
+2% +$2.29M
CBM
70
DELISTED
Cambrex Corporation
CBM
$103M 0.43%
2,659,481
+75,662
+3% +$3.1M
STE icon
71
Steris
STE
$23.4B
$103M 0.43%
+803,400
New +$94.6M
EL icon
72
Estee Lauder
EL
$31.7B
$102M 0.43%
617,962
+32,230
+6% +$4.73M
QGEN icon
73
Qiagen
QGEN
$8.86B
$101M 0.43%
2,348,725
-90,099
-4% -$3.62M
PEN icon
74
Penumbra
PEN
$12.9B
$101M 0.42%
686,813
-4,089
-0.6% -$584K
TME icon
75
Tencent Music
TME
$14.3B
$100M 0.42%
5,528,624
+4,039,589
+271% +$64.5M
1 2
3
4 5

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William Blair Investment Management's Q1 2019 Portfolio in Review

As of Q1 2019, William Blair Investment Management held 441 positions worth $23.8B, up 18% from $20.1B the previous quarter. Its ten largest holdings account for 20% of the portfolio.

William Blair Investment Management's Q1 2019 filing shows 37 new, 142 increased, 223 reduced and 35 closed positions. Its largest new stake was Steris: 803,400 shares worth $103M. The largest sale was Six Flags Entertainment Corp., an estimated $151M.

By sector, the portfolio is most concentrated in Technology at 17% of assets, up from 16% a quarter earlier, followed by Consumer Discretionary and Healthcare.

  • William Blair Investment Management's largest Q1 2019 buy was Steris: 803,400 shares worth $103M.
  • William Blair Investment Management added most to Check Point Software Technologies in Q1 2019, an estimated $181M increase.
  • William Blair Investment Management's biggest Q1 2019 reduction was WW International, cutting an estimated $59M.
  • William Blair Investment Management fully exited Six Flags Entertainment Corp. in Q1 2019, selling an estimated $151M.
  • William Blair Investment Management's ten largest holdings make up 20% of its $23.8B portfolio in Q1 2019.
  • William Blair Investment Management opened 37 new positions and closed 35 in Q1 2019.
  • William Blair Investment Management's portfolio value rose 18% quarter-over-quarter to $23.8B.

Based on William Blair Investment Management's 13F filing for Q1 2019, filed 10 May 2019.