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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+10.92%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$16.3B
AUM Growth
+$1.62B
Cap. Flow
+$161M
Cap. Flow %
0.98%
Top 10 Hldgs %
21.12%
Holding
1,696
New
110
Increased
623
Reduced
570
Closed
77

Top Buys

Rank Stock Value
1
DLB icon
Dolby
DLB
+$37M
2
DSI icon
iShares MSCI KLD 400 Social ETF
DSI
+$20M
3
PGR icon
Progressive
PGR
+$19.6M
4
KMX icon
CarMax
KMX
+$19.2M
5
TYL icon
Tyler Technologies
TYL
+$18.5M

Top Sells

Rank Stock Value
1
SBUX icon
Starbucks
SBUX
+$35.1M
2
META icon
Meta Platforms (Facebook)
META
+$18.3M
3
INGN icon
Inogen
INGN
+$14.6M
4
MKTX icon
MarketAxess Holdings
MKTX
+$13M
5
PF
Pinnacle Foods, Inc.
PF
+$12.6M

Sector Composition

Rank Sector Weight
1 Technology 21.34%
2 Healthcare 18.9%
3 Financials 12.91%
4 Industrials 9.71%
5 Consumer Discretionary 9.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SIEN
401
DELISTED
Sientra, Inc.
SIEN
$4.26M 0.03%
17,823
+3,083
+21% +$677K
WES
402
DELISTED
Western Gas Partners Lp
WES
$4.26M 0.03%
97,435
-1,760
-2% -$87.3K
XLK icon
403
State Street Technology Select Sector SPDR ETF
XLK
$122B
$4.25M 0.03%
112,972
-13,738
-11% -$504K
LMT icon
404
Lockheed Martin
LMT
$135B
$4.25M 0.03%
12,297
+921
+8% +$297K
ES icon
405
Eversource Energy
ES
$27.1B
$4.25M 0.03%
69,102
-937
-1% -$57.3K
PCYO icon
406
Pure Cycle
PCYO
$257M
$4.2M 0.03%
363,505
-2,500
-0.7% -$27.2K
IVW icon
407
iShares S&P 500 Growth ETF
IVW
$77B
$4.19M 0.03%
94,664
+7,928
+9% +$341K
VSAT icon
408
Viasat
VSAT
$11.3B
$4.19M 0.03%
65,484
+1,565
+2% +$103K
TDOC icon
409
Teladoc Health
TDOC
$1.21B
$4.19M 0.03%
48,480
+5,662
+13% +$404K
LMNX
410
DELISTED
Luminex Corp
LMNX
$4.17M 0.03%
137,582
-5,506
-4% -$165K
MAIN icon
411
Main Street Capital
MAIN
$5.28B
$4.17M 0.03%
108,257
-100
-0.1% -$3.96K
DDD icon
412
3D Systems Corp
DDD
$588M
$4.16M 0.03%
219,900
-74,325
-25% -$1.28M
VIRT icon
413
Virtu Financial
VIRT
$4.91B
$4.13M 0.03%
201,939
+1,653
+0.8% +$37.7K
JBTM
414
JBT Marel
JBTM
$6.36B
$4.11M 0.03%
34,480
+345
+1% +$37.5K
COF icon
415
Capital One
COF
$135B
$4.07M 0.02%
42,850
-836
-2% -$81.3K
CNNE icon
416
Cannae Holdings
CNNE
$652M
$4.04M 0.02%
192,748
-4,750
-2% -$92.9K
GIS icon
417
General Mills
GIS
$19.3B
$4.01M 0.02%
93,512
+6,972
+8% +$316K
IUSG icon
418
iShares Core S&P US Growth ETF
IUSG
$33.4B
$4.01M 0.02%
64,551
+9,585
+17% +$579K
PHO icon
419
Invesco Water Resources ETF
PHO
$2.08B
$4M 0.02%
125,650
-700
-0.6% -$22K
CORP icon
420
PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund
CORP
$1.58B
$3.95M 0.02%
39,240
+4,515
+13% +$455K
IWO icon
421
iShares Russell 2000 Growth ETF
IWO
$14.8B
$3.92M 0.02%
18,248
+537
+3% +$114K
SCHL icon
422
Scholastic
SCHL
$753M
$3.91M 0.02%
83,750
-2,200
-3% -$94.5K
LSTR icon
423
Landstar System
LSTR
$6.01B
$3.84M 0.02%
31,455
-1,475
-4% -$171K
LQD icon
424
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$32.9B
$3.82M 0.02%
33,212
-2,804
-8% -$323K
KNSL icon
425
Kinsale Capital Group
KNSL
$8.57B
$3.78M 0.02%
59,124
-7,590
-11% -$451K
15 16
17
18 19

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William Blair & Company's Q3 2018 Portfolio in Review

As of Q3 2018, William Blair & Company held 1,696 positions worth $16.3B, up 11% from $14.7B the previous quarter. Its ten largest holdings account for 21% of the portfolio.

William Blair & Company's Q3 2018 filing shows 110 new, 623 increased, 570 reduced and 77 closed positions. Its largest new stake was Marvell Technology: 234,218 shares worth $4.52M. The largest sale was Starbucks, an estimated $35.1M.

By sector, the portfolio is most concentrated in Technology at 21% of assets, up from 20% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q3 2018 buy was Marvell Technology: 234,218 shares worth $4.52M.
  • William Blair & Company added most to Dolby in Q3 2018, an estimated $37M increase.
  • William Blair & Company's biggest Q3 2018 reduction was Starbucks, cutting an estimated $35.1M.
  • William Blair & Company fully exited Williams Partners L.P. in Q3 2018, selling an estimated $7.8M.
  • William Blair & Company's ten largest holdings make up 21% of its $16.3B portfolio in Q3 2018.
  • William Blair & Company opened 110 new positions and closed 77 in Q3 2018.
  • William Blair & Company's portfolio value rose 11% quarter-over-quarter to $16.3B.

Based on William Blair & Company's 13F filing for Q3 2018, filed 13 Nov 2018.