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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
-14.81%
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
$20.1B
AUM Growth
-$8.75B
Cap. Flow
-$4.18B
Cap. Flow %
-20.77%
Top 10 Hldgs %
19.04%
Holding
450
New
31
Increased
192
Reduced
174
Closed
46

Top Buys

Rank Stock Value
1
CNI icon
Canadian National Railway
CNI
+$128M
2
WW
WW International
WW
+$107M
3
INGN icon
Inogen
INGN
+$106M
4
TREX icon
Trex
TREX
+$106M
5
SABR icon
Sabre
SABR
+$95.3M

Sector Composition

Rank Sector Weight
1 Technology 16.34%
2 Healthcare 14.5%
3 Financials 13.62%
4 Consumer Discretionary 13.1%
5 Industrials 12.65%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake
Capital Flow
AMZN icon
26
Amazon
AMZN
$3T
$175M 0.87%
2,325,980
-1,166,800
-33% -$97M
MLM icon
27
Martin Marietta Materials
MLM
$33B
$174M 0.86%
1,011,045
-10,684
-1% -$1.9M
LOPE icon
28
Grand Canyon Education
LOPE
$3.82B
$169M 0.84%
1,755,206
+46,226
+3% +$5.37M
HCSG icon
29
Healthcare Services Group
HCSG
$1.5B
$167M 0.83%
4,168,217
-40,729
-1% -$1.72M
GOOGL icon
30
Alphabet (Google) Class A
GOOGL
$4.37T
$164M 0.82%
3,148,200
-1,084,520
-26% -$58.6M
TDY icon
31
Teledyne Technologies
TDY
$32B
$163M 0.81%
787,035
-10,129
-1% -$2.22M
TRU icon
32
TransUnion
TRU
$15.2B
$160M 0.79%
2,812,534
-169,507
-6% -$10.8M
P
33
Everpure Inc
P
$32.6B
$159M 0.79%
9,889,859
-1,259,661
-11% -$24.8M
MIDD icon
34
Middleby
MIDD
$5.89B
$157M 0.78%
1,527,407
-383,044
-20% -$43.6M
GDDY icon
35
GoDaddy
GDDY
$11.6B
$153M 0.76%
2,337,360
-507,338
-18% -$34.7M
SIX
36
DELISTED
Six Flags Entertainment Corp.
SIX
$151M 0.75%
2,714,561
-2,234,983
-45% -$134M
DXCM icon
37
DexCom
DXCM
$33.1B
$150M 0.75%
5,022,488
-2,938,564
-37% -$93.2M
PODD icon
38
Insulet
PODD
$9.91B
$147M 0.73%
1,854,198
-17,763
-0.9% -$1.5M
HEI.A icon
39
HEICO Corp Class A
HEI.A
$37B
$143M 0.71%
2,273,528
-387,479
-15% -$26M
ROG icon
40
Rogers Corp
ROG
$2.29B
$143M 0.71%
1,441,688
-14,576
-1% -$1.75M
UNH icon
41
UnitedHealth
UNH
$371B
$139M 0.69%
556,627
-276,446
-33% -$73M
GKOS icon
42
Glaukos
GKOS
$10.7B
$138M 0.69%
2,456,031
+13,089
+0.5% +$787K
FCFS icon
43
FirstCash
FCFS
$9.05B
$138M 0.68%
1,904,565
-22,507
-1% -$1.8M
NTES icon
44
NetEase
NTES
$85.4B
$134M 0.67%
2,843,690
+1,757,525
+162% +$79.3M
CE icon
45
Celanese
CE
$4.88B
$133M 0.66%
1,480,888
-192,990
-12% -$18.9M
LGND icon
46
Ligand Pharmaceuticals
LGND
$6.42B
$133M 0.66%
1,566,586
-84,785
-5% -$9.04M
EXAS
47
DELISTED
Exact Sciences
EXAS
$131M 0.65%
2,070,432
-263,613
-11% -$18.1M
HZNP
48
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
$130M 0.65%
6,672,792
-3,928,355
-37% -$77M
ZD icon
49
Ziff Davis
ZD
$2B
$130M 0.64%
2,148,573
-725,428
-25% -$45.8M
SABR icon
50
Sabre
SABR
$835M
$129M 0.64%
5,938,707
+3,938,677
+197% +$95.3M

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William Blair Investment Management's Q4 2018 Portfolio in Review

As of Q4 2018, William Blair Investment Management held 450 positions worth $20.1B, down 30% from $28.9B the previous quarter. Its ten largest holdings account for 19% of the portfolio.

William Blair Investment Management withdrew a net $4.18B in Q4 2018, closing 46 positions and reducing 174 holdings. Its most notable exit was Hexcel, an estimated $187M position sold in full.

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

Against the trend, William Blair Investment Management opened a new position in Inogen worth $80.2M.

  • William Blair Investment Management's largest Q4 2018 buy was Inogen: 646,263 shares worth $80.2M.
  • William Blair Investment Management added most to Canadian National Railway in Q4 2018, an estimated $128M increase.
  • William Blair Investment Management's biggest Q4 2018 reduction was Suncor Energy, cutting an estimated $195M.
  • William Blair Investment Management fully exited Hexcel in Q4 2018, selling an estimated $187M.
  • William Blair Investment Management's ten largest holdings make up 19% of its $20.1B portfolio in Q4 2018.
  • William Blair Investment Management opened 31 new positions and closed 46 in Q4 2018.
  • William Blair Investment Management's portfolio value fell 30% quarter-over-quarter to $20.1B.

Based on William Blair Investment Management's 13F filing for Q4 2018, filed 13 Feb 2019.