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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
+17.39%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+512.03%
AUM
$16.4B
AUM Growth
+$2.69B
Cap. Flow
+$462M
Cap. Flow %
2.81%
Top 10 Hldgs %
21%
Holding
1,770
New
129
Increased
755
Reduced
489
Closed
65

Top Buys

Rank Stock Value
1
FISV
Fiserv Inc
FISV
+$65.4M
2
P
Everpure Inc
P
+$35.3M
3
PYPL icon
PayPal
PYPL
+$30.4M
4
BA icon
Boeing
BA
+$28.3M
5
TWLO icon
Twilio
TWLO
+$24.2M

Top Sells

Rank Stock Value
1
RHT
Red Hat Inc
RHT
+$73.4M
2
ULTI
Ultimate Software Group Inc
ULTI
+$70.6M
3
INGN icon
Inogen
INGN
+$25.8M
4
CELG
Celgene Corp
CELG
+$20.1M
5
SDY icon
State Street SPDR S&P Dividend ETF
SDY
+$13.1M

Sector Composition

Rank Sector Weight
1 Technology 22.65%
2 Healthcare 17.38%
3 Financials 12.48%
4 Consumer Discretionary 9.87%
5 Industrials 9.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AAPL icon
1
Apple
AAPL
$4.97T
$479M 2.92%
10,088,832
+162,120
+2% +$6.88M
MSFT icon
2
Microsoft
MSFT
$2.9T
$472M 2.88%
4,002,786
+106,176
+3% +$11.6M
AMZN icon
3
Amazon
AMZN
$2.44T
$469M 2.86%
5,267,800
+269,760
+5% +$22.4M
V icon
4
Visa
V
$701B
$410M 2.5%
2,626,754
+47,192
+2% +$6.8M
IDXX icon
5
Idexx Laboratories
IDXX
$44.9B
$354M 2.16%
1,582,222
+10,586
+0.7% +$2.19M
VEEV icon
6
Veeva Systems
VEEV
$33.8B
$269M 1.64%
2,120,937
-45,330
-2% -$5.11M
MA icon
7
Mastercard
MA
$498B
$268M 1.64%
1,139,460
+29,886
+3% +$6.43M
GOOG icon
8
Alphabet (Google) Class C
GOOG
$4.11T
$252M 1.53%
4,290,260
+134,040
+3% +$7.52M
ZTS icon
9
Zoetis
ZTS
$32.7B
$240M 1.46%
2,386,283
+14,260
+0.6% +$1.29M
DHR icon
10
Danaher
DHR
$138B
$231M 1.41%
1,971,688
+103,555
+6% +$10.6M
ADBE icon
11
Adobe
ADBE
$105B
$209M 1.28%
785,195
+1,280
+0.2% +$323K
WDAY icon
12
Workday
WDAY
$41.5B
$208M 1.27%
1,077,343
+57,358
+6% +$10.4M
PYPL icon
13
PayPal
PYPL
$50.3B
$205M 1.25%
1,970,405
+320,860
+19% +$30.4M
SBUX icon
14
Starbucks
SBUX
$119B
$197M 1.2%
2,654,256
+69,189
+3% +$4.76M
VUG icon
15
Vanguard Growth ETF
VUG
$212B
$170M 1.04%
6,525,516
+412,260
+7% +$10.2M
ECL icon
16
Ecolab
ECL
$79.8B
$165M 1.01%
936,929
+14,049
+2% +$2.28M
JPM icon
17
JPMorgan Chase
JPM
$916B
$160M 0.98%
1,584,672
+138,927
+10% +$14.3M
GOOGL icon
18
Alphabet (Google) Class A
GOOGL
$4.12T
$153M 0.93%
2,599,660
+90,740
+4% +$5.12M
SPY icon
19
State Street SPDR S&P 500 ETF Trust
SPY
$771B
$152M 0.93%
537,449
-11,349
-2% -$3.08M
CRM icon
20
Salesforce
CRM
$154B
$151M 0.92%
955,296
+44,812
+5% +$6.95M
FISV
21
Fiserv Inc
FISV
$29.7B
$144M 0.88%
1,632,548
+792,277
+94% +$65.4M
RHT
22
DELISTED
Red Hat Inc
RHT
$144M 0.88%
787,606
-409,577
-34% -$73.4M
GWRE icon
23
Guidewire Software
GWRE
$13.9B
$141M 0.86%
1,455,222
+83,182
+6% +$7.44M
FAST icon
24
Fastenal
FAST
$54.8B
$132M 0.8%
8,210,412
-293,596
-3% -$4.42M
VRSK icon
25
Verisk Analytics
VRSK
$27.9B
$131M 0.8%
984,143
+12,866
+1% +$1.57M
1
2 3 4 5

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William Blair & Company's Q1 2019 Portfolio in Review

As of Q1 2019, William Blair & Company held 1,770 positions worth $16.4B, up 20% from $13.7B the previous quarter. Its ten largest holdings account for 21% of the portfolio.

William Blair & Company's Q1 2019 filing shows 129 new, 755 increased, 489 reduced and 65 closed positions. Its largest new stake was Western Midstream Partners: 147,267 shares worth $4.62M. The largest sale was Red Hat Inc, an estimated $73.4M.

By sector, the portfolio is most concentrated in Technology at 23% of assets, up from 21% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q1 2019 buy was Western Midstream Partners: 147,267 shares worth $4.62M.
  • William Blair & Company added most to Fiserv Inc in Q1 2019, an estimated $65.4M increase.
  • William Blair & Company's biggest Q1 2019 reduction was Red Hat Inc, cutting an estimated $73.4M.
  • William Blair & Company fully exited MB Financial Corp in Q1 2019, selling an estimated $7.72M.
  • William Blair & Company's ten largest holdings make up 21% of its $16.4B portfolio in Q1 2019.
  • William Blair & Company opened 129 new positions and closed 65 in Q1 2019.
  • William Blair & Company's portfolio value rose 20% quarter-over-quarter to $16.4B.

Based on William Blair & Company's 13F filing for Q1 2019, filed 14 May 2019.