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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

Top Sells

Rank Stock Value
1
SU icon
Suncor Energy
SU
+$195M
2
HXL icon
Hexcel
HXL
+$187M
3
TYL icon
Tyler Technologies
TYL
+$154M
4
SIX
Six Flags Entertainment Corp.
SIX
+$134M
5
MSFT icon
Microsoft
MSFT
+$118M

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
OZK icon
426
Bank OZK
OZK
$5.66B
– –
-2,461,348
Closed -$93.4M
RGEN icon
427
Repligen
RGEN
$9.3B
– –
-1,363,109
Closed -$75.6M
SHOO icon
428
Steven Madden
SHOO
$3.53B
– –
-703,692
Closed -$24.8M
SHOP icon
429
Shopify
SHOP
$196B
– –
-6,065,850
Closed -$99.8M
SIMO icon
430
Silicon Motion
SIMO
$7.6B
– –
-276,472
Closed -$14.8M
SWX icon
431
Southwest Gas
SWX
$6.63B
– –
-225,764
Closed -$17.8M
TCOM icon
432
Trip.com Group
TCOM
$29.1B
– –
-1,117,237
Closed -$41.5M
TDG icon
433
TransDigm Group
TDG
$68.7B
– –
-104,460
Closed -$38.9M
TREE icon
434
LendingTree
TREE
$443M
– –
-461,906
Closed -$106M
TYL icon
435
Tyler Technologies
TYL
$13.2B
– –
-630,345
Closed -$154M
UNF icon
436
Unifirst Corp
UNF
$5.27B
– –
-104,175
Closed -$18.1M
WAB icon
437
Wabtec
WAB
$50.3B
– –
-534,808
Closed -$56.1M
WSO icon
438
Watsco Inc
WSO
$13.2B
– –
-157,391
Closed -$28M
ZWS icon
439
Zurn Elkay Water Solutions
ZWS
$8.6B
– –
-966,451
Closed -$14.3M
ONC
440
BeOne Medicines Ltd
ONC
$40.6B
– –
-77,463
Closed -$13.3M
ABB
441
DELISTED
ABB Ltd
ABB
– –
-245,479
Closed -$5.8M
COHR
442
DELISTED
Coherent Inc
COHR
– –
-522,899
Closed -$90M
JOBS
443
DELISTED
51job Inc
JOBS
– –
-364,353
Closed -$28.1M
GSKY
444
DELISTED
GreenSky, Inc. Class A Common Stock
GSKY
– –
-1,020,678
Closed -$18.4M
WBC
445
DELISTED
WABCO HOLDINGS INC.
WBC
– –
-8,958
Closed -$1.06M
NTRI
446
DELISTED
NutriSystem, Inc.
NTRI
– –
-864,149
Closed -$32M
PX
447
DELISTED
Praxair Inc
PX
– –
-496,736
Closed -$79.8M
CBB
448
DELISTED
Cincinnati Bell Inc.
CBB
– –
-797,547
Closed -$12.7M
COBZ
449
DELISTED
CoBiz Financial,Inc
COBZ
– –
-599,240
Closed -$13.3M
EE
450
DELISTED
El Paso Electric Company
EE
– –
-294,868
Closed -$16.9M
14 15 16 17
18

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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.