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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
FFIV icon
576
F5
FFIV
$23.1B
$1.82M 0.01%
9,116
+2,200
+32% +$403K
OAK
577
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
$1.81M 0.01%
43,761
+2,050
+5% +$84.3K
ROKU icon
578
Roku
ROKU
$22.6B
$1.8M 0.01%
24,600
+3,250
+15% +$186K
FBIN icon
579
Fortune Brands Innovations
FBIN
$6.04B
$1.78M 0.01%
39,685
-550
-1% -$25.9K
CONE
580
DELISTED
CyrusOne Inc Common Stock
CONE
$1.77M 0.01%
27,917
+11,110
+66% +$719K
VKTXW
581
DELISTED
Viking Therapeutics, Inc.
VKTXW
$1.77M 0.01%
110,805
-15,740
-12% -$164K
WIFI
582
DELISTED
Boingo Wireless, Inc.
WIFI
$1.76M 0.01%
50,475
-8,250
-14% -$240K
OSBC icon
583
Old Second Bancorp
OSBC
$1.3B
$1.76M 0.01%
113,891
+20,237
+22% +$308K
SEP
584
DELISTED
Spectra Engy Parters Lp
SEP
$1.75M 0.01%
49,077
-24,223
-33% -$897K
DOV icon
585
Dover
DOV
$28.6B
$1.74M 0.01%
19,691
-993
-5% -$81.9K
SMAR
586
DELISTED
Smartsheet Inc.
SMAR
$1.74M 0.01%
55,758
-24,667
-31% -$657K
MMI icon
587
Marcus & Millichap
MMI
$1.21B
$1.74M 0.01%
50,002
+2,090
+4% +$79.2K
GKOS icon
588
Glaukos
GKOS
$10.5B
$1.74M 0.01%
26,730
-980
-4% -$48.1K
IBN icon
589
ICICI Bank
IBN
$108B
$1.73M 0.01%
204,241
-9,407
-4% -$83.2K
PODD icon
590
Insulet
PODD
$9.71B
$1.73M 0.01%
16,340
+692
+4% +$64.8K
ADSK icon
591
Autodesk
ADSK
$52.5B
$1.71M 0.01%
10,964
+771
+8% +$109K
ROST icon
592
Ross Stores
ROST
$81.5B
$1.71M 0.01%
17,261
+4,574
+36% +$420K
MNST icon
593
Monster Beverage
MNST
$88.5B
$1.7M 0.01%
58,402
-828
-1% -$24.9K
GG
594
DELISTED
Goldcorp Inc
GG
$1.7M 0.01%
166,839
-2,003
-1% -$23.5K
AMLP icon
595
Alerian MLP ETF
AMLP
$12.9B
$1.7M 0.01%
31,821
-886
-3% -$47.8K
EBAY icon
596
eBay
EBAY
$50.4B
$1.7M 0.01%
51,421
-58,543
-53% -$2.03M
HDV
597
iShares Core High Dividend ETF
HDV
$14.8B
$1.7M 0.01%
93,745
+10,005
+12% +$177K
PETX
598
DELISTED
Aratana Therapeutics, Inc.
PETX
$1.69M 0.01%
288,525
-312,955
-52% -$1.56M
ISTB icon
599
iShares Core 1-5 Year USD Bond ETF
ISTB
$5.13B
$1.68M 0.01%
34,332
-4,952
-13% -$243K
WWD icon
600
Woodward
WWD
$21.5B
$1.67M 0.01%
20,672
+242
+1% +$19.4K
22 23
24
25 26

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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.