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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
+9.1%
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
$19.5B
AUM Growth
+$2.1B
Cap. Flow
+$465M
Cap. Flow %
2.39%
Top 10 Hldgs %
22.3%
Holding
1,847
New
125
Increased
679
Reduced
598
Closed
120

Top Buys

Rank Stock Value
1
ANET icon
Arista Networks
ANET
+$24M
2
DIS icon
Walt Disney
DIS
+$22.5M
3
PYPL icon
PayPal
PYPL
+$21.1M
4
AXP icon
American Express
AXP
+$18.6M
5
NOW icon
ServiceNow
NOW
+$15.5M

Top Sells

Rank Stock Value
1
CELG
Celgene Corp
CELG
+$25M
2
ULTA icon
Ulta Beauty
ULTA
+$21.8M
3
EOG icon
EOG Resources
EOG
+$20.9M
4
ABMD
Abiomed Inc
ABMD
+$16.3M
5
GRUB
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
+$11.2M

Sector Composition

Rank Sector Weight
1 Technology 23.46%
2 Healthcare 17.35%
3 Financials 13.04%
4 Consumer Discretionary 9.94%
5 Industrials 9.53%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MNDT
651
DELISTED
Mandiant, Inc. Common Stock
MNDT
$1.68M 0.01%
101,830
+50,117
+97% +$804K
EBAY icon
652
eBay
EBAY
$48.9B
$1.67M 0.01%
46,349
-1,481
-3% -$53.7K
DNKN
653
DELISTED
Dunkin' Brands Group, Inc.
DNKN
$1.67M 0.01%
22,076
-224
-1% -$16.9K
EXP icon
654
Eagle Materials
EXP
$6.48B
$1.66M 0.01%
18,338
-219
-1% -$20.1K
IVE icon
655
iShares S&P 500 Value ETF
IVE
$49.6B
$1.61M 0.01%
12,368
+1,599
+15% +$199K
PAAS icon
656
Pan American Silver
PAAS
$20.2B
$1.58M 0.01%
66,678
– –
SLRC icon
657
SLR Investment Corp
SLRC
$705M
$1.57M 0.01%
75,992
+32,106
+73% +$660K
XLY icon
658
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$22.9B
$1.56M 0.01%
24,908
-1,512
-6% -$92K
AVB icon
659
AvalonBay Communities
AVB
$26.6B
$1.56M 0.01%
7,435
-294
-4% -$63K
DHI icon
660
D.R. Horton
DHI
$40.8B
$1.56M 0.01%
29,530
+17,167
+139% +$916K
LW icon
661
Lamb Weston
LW
$7.16B
$1.55M 0.01%
18,066
+13,034
+259% +$1.05M
PBCT
662
DELISTED
People's United Financial Inc
PBCT
$1.55M 0.01%
91,802
-1,946
-2% -$31.9K
PPLI
663
People Inc
PPLI
$3.2B
$1.54M 0.01%
34,669
-8,998
-21% -$363K
VFH icon
664
Vanguard Financials ETF
VFH
$13.7B
$1.54M 0.01%
20,231
+846
+4% +$61.7K
GDDY icon
665
GoDaddy
GDDY
$11.4B
$1.54M 0.01%
22,643
+8,240
+57% +$545K
XENT
666
DELISTED
Intersect ENT, Inc
XENT
$1.53M 0.01%
61,589
-411
-0.7% -$8.33K
MPWR icon
667
Monolithic Power Systems
MPWR
$66.8B
$1.52M 0.01%
8,565
+151
+2% +$24.1K
SUB icon
668
iShares Short-Term National Muni Bond ETF
SUB
$11.4B
$1.52M 0.01%
14,273
+1,157
+9% +$123K
UHAL icon
669
U-Haul Holding Co
UHAL
$14.6B
$1.52M 0.01%
40,390
-2,470
-6% -$93.8K
SPEM icon
670
State Street SPDR Portfolio Emerging Markets ETF
SPEM
$17.6B
$1.52M 0.01%
40,317
+24,942
+162% +$899K
WLKP icon
671
Westlake Chemical Partners
WLKP
$752M
$1.51M 0.01%
56,996
-39,986
-41% -$918K
PPG icon
672
PPG Industries
PPG
$26B
$1.5M 0.01%
11,276
+3,141
+39% +$398K
HDB icon
673
HDFC Bank
HDB
$122B
$1.5M 0.01%
47,376
+18,508
+64% +$564K
LSTR icon
674
Landstar System
LSTR
$6.01B
$1.5M 0.01%
13,177
-2,391
-15% -$270K
NSSC icon
675
Napco Security Technologies
NSSC
$1.46B
$1.49M 0.01%
101,480
+5,260
+5% +$76.3K
25 26
27
28 29

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William Blair & Company's Q4 2019 Portfolio in Review

As of Q4 2019, William Blair & Company held 1,847 positions worth $19.5B, up 12% from $17.4B the previous quarter. Its ten largest holdings account for 22% of the portfolio.

William Blair & Company's Q4 2019 filing shows 125 new, 679 increased, 598 reduced and 120 closed positions. Its largest new stake was Dynatrace: 165,602 shares worth $4.19M. The largest sale was Celgene Corp, an estimated $25M.

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

  • William Blair & Company's largest Q4 2019 buy was Dynatrace: 165,602 shares worth $4.19M.
  • William Blair & Company added most to Arista Networks in Q4 2019, an estimated $24M increase.
  • William Blair & Company's biggest Q4 2019 reduction was Ulta Beauty, cutting an estimated $21.8M.
  • William Blair & Company fully exited Celgene Corp in Q4 2019, selling an estimated $25M.
  • William Blair & Company's ten largest holdings make up 22% of its $19.5B portfolio in Q4 2019.
  • William Blair & Company opened 125 new positions and closed 120 in Q4 2019.
  • William Blair & Company's portfolio value rose 12% quarter-over-quarter to $19.5B.

Based on William Blair & Company's 13F filing for Q4 2019, filed 13 Feb 2020.