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William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $33.3B
1-Year Est. Return 44.76%
This Fund
S&P 500
This Quarter Est. Return
-14.67%
1 Year Est. Return
+44.76%
3 Year Est. Return
+140.8%
5 Year Est. Return
+166.51%
10 Year Est. Return
+978.6%
AUM
$20.5B
AUM Growth
-$4.55B
Cap. Flow
-$12.9M
Cap. Flow %
-0.06%
Top 10 Hldgs %
22.75%
Holding
396
New
40
Increased
177
Reduced
118
Closed
57

Top Buys

Rank Stock Value
1
TAL icon
TAL Education Group
TAL
+$224M
2
SEDG icon
SolarEdge
SEDG
+$152M
3
MRCY icon
Mercury Systems
MRCY
+$143M
4
MASI
Masimo
MASI
+$138M
5
BCO icon
Brink's
BCO
+$124M

Top Sells

Rank Stock Value
1
MTN icon
Vail Resorts
MTN
+$240M
2
TD icon
Toronto Dominion Bank
TD
+$237M
3
SABR icon
Sabre
SABR
+$207M
4
CHKP icon
Check Point Software Technologies
CHKP
+$173M
5
GWRE icon
Guidewire Software
GWRE
+$141M

Sector Composition

Rank Sector Weight
1 Technology 22.09%
2 Healthcare 16.18%
3 Consumer Discretionary 14.43%
4 Industrials 13.27%
5 Financials 9.12%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ZD icon
26
Ziff Davis
ZD
$1.89B
$194M 0.94%
2,978,544
+136,945
+5% +$10.7M
MSFT icon
27
Microsoft
MSFT
$3.66T
$190M 0.93%
1,207,778
-3,237
-0.3% -$532K
BAH icon
28
Booz Allen Hamilton
BAH
$9.34B
$190M 0.92%
2,766,936
+52,031
+2% +$3.83M
CCK icon
29
Crown Holdings
CCK
$13.1B
$186M 0.9%
3,200,458
+116,581
+4% +$8.11M
AMED
30
DELISTED
Amedisys
AMED
$178M 0.87%
970,033
-100,121
-9% -$17.8M
ZNGA
31
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
$173M 0.84%
25,282,591
+2,420,715
+11% +$15.9M
STE icon
32
Steris
STE
$23B
$172M 0.84%
1,225,732
+157,035
+15% +$23.5M
VIRT icon
33
Virtu Financial
VIRT
$4.97B
$169M 0.82%
8,130,622
+15,650
+0.2% +$289K
LULU icon
34
lululemon athletica
LULU
$13.8B
$161M 0.79%
851,079
+247,739
+41% +$55.4M
LW icon
35
Lamb Weston
LW
$7.27B
$158M 0.77%
2,768,374
-661,994
-19% -$54.4M
UNH icon
36
UnitedHealth
UNH
$363B
$158M 0.77%
632,925
-9,511
-1% -$2.62M
GDDY icon
37
GoDaddy
GDDY
$11.5B
$155M 0.76%
2,720,994
-8,632
-0.3% -$571K
BURL icon
38
Burlington
BURL
$22.2B
$155M 0.75%
977,093
-489,899
-33% -$103M
MRCY icon
39
Mercury Systems
MRCY
$6.62B
$153M 0.75%
2,150,709
+1,886,864
+715% +$143M
FCFS icon
40
FirstCash
FCFS
$9.17B
$152M 0.74%
2,113,052
+74,056
+4% +$5.99M
AZPN
41
DELISTED
ASPEN TECHNOLOGY INC
AZPN
$149M 0.73%
1,570,625
+75,132
+5% +$7.14M
PODD icon
42
Insulet
PODD
$9.94B
$148M 0.72%
895,609
-705,415
-44% -$129M
MA icon
43
Mastercard
MA
$488B
$147M 0.71%
607,702
+56,269
+10% +$16.7M
NBIS
44
Nebius Group N.V.
NBIS
$62.8B
$146M 0.71%
4,286,901
+1,389,354
+48% +$57.3M
MASI
45
DELISTED
Masimo
MASI
$142M 0.69%
+804,330
New +$138M
HTHT icon
46
Huazhu Hotels Group
HTHT
$12.7B
$142M 0.69%
4,934,522
+384,428
+8% +$13.1M
HCSG icon
47
Healthcare Services Group
HCSG
$1.46B
$138M 0.67%
5,776,034
+94,442
+2% +$2.43M
EEFT icon
48
Euronet Worldwide
EEFT
$2.61B
$138M 0.67%
1,604,366
-462,834
-22% -$61.3M
TRU icon
49
TransUnion
TRU
$15.2B
$132M 0.64%
1,988,311
-559,628
-22% -$48.3M
RBA icon
50
RB Global
RBA
$16B
$128M 0.62%
3,740,272
+102,239
+3% +$4.08M
1
2
3 4 5

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William Blair Investment Management's Q1 2020 Portfolio in Review

As of Q1 2020, William Blair Investment Management held 396 positions worth $20.5B, down 18% from $25.1B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

William Blair Investment Management's Q1 2020 filing shows 40 new, 177 increased, 118 reduced and 57 closed positions. Its largest new stake was SolarEdge: 1,432,686 shares worth $117M. The largest sale was Vail Resorts, an estimated $240M.

By sector, the portfolio is most concentrated in Technology at 22% of assets, down from 23% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • William Blair Investment Management's largest Q1 2020 buy was SolarEdge: 1,432,686 shares worth $117M.
  • William Blair Investment Management added most to TAL Education Group in Q1 2020, an estimated $224M increase.
  • William Blair Investment Management's biggest Q1 2020 reduction was Check Point Software Technologies, cutting an estimated $173M.
  • William Blair Investment Management fully exited Vail Resorts in Q1 2020, selling an estimated $240M.
  • William Blair Investment Management's ten largest holdings make up 23% of its $20.5B portfolio in Q1 2020.
  • William Blair Investment Management opened 40 new positions and closed 57 in Q1 2020.
  • William Blair Investment Management's portfolio value fell 18% quarter-over-quarter to $20.5B.

Based on William Blair Investment Management's 13F filing for Q1 2020, filed 8 May 2020.