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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
TTE icon
TotalEnergies
TTE
+$155M
2
RHT
Red Hat Inc
RHT
+$73.4M
3
ULTI
Ultimate Software Group Inc
ULTI
+$70.6M
4
INGN icon
Inogen
INGN
+$25.8M
5
CELG
Celgene Corp
CELG
+$20.1M

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
IRM icon
201
Iron Mountain
IRM
$37.8B
$15M 0.09%
422,901
+33,118
+8% +$1.17M
SHAK icon
202
Shake Shack
SHAK
$3B
$14.8M 0.09%
250,968
-3,745
-1% -$192K
VOE icon
203
Vanguard Morningstar Mid-Cap Value ETF
VOE
$24B
$14.8M 0.09%
137,214
+9,022
+7% +$947K
ET icon
204
Energy Transfer Partners
ET
$70B
$14.7M 0.09%
814,382
+19,451
+2% +$289K
AXDX
205
DELISTED
Accelerate Diagnostics
AXDX
$14.6M 0.09%
69,452
+5,485
+9% +$1.03M
CVS icon
206
CVS Health
CVS
$126B
$14.5M 0.09%
269,556
-13,855
-5% -$855K
CI icon
207
Cigna
CI
$71.5B
$14.5M 0.09%
90,073
-11,542
-11% -$2.11M
HLT icon
208
Hilton Worldwide
HLT
$73B
$14.2M 0.09%
170,993
+143
+0.1% +$11.2K
SPSB icon
209
State Street SPDR Portfolio Short Term Corporate Bond ETF
SPSB
$10.7B
$14M 0.09%
456,150
+65,443
+17% +$1.99M
RBA icon
210
RB Global
RBA
$17.8B
$13.9M 0.08%
409,382
+11,813
+3% +$416K
BWXT icon
211
BWX Technologies
BWXT
$15.4B
$13.9M 0.08%
279,697
-53,138
-16% -$2.51M
EFG icon
212
iShares MSCI EAFE Growth ETF
EFG
$17.1B
$13.8M 0.08%
177,640
-7,660
-4% -$568K
PFNX
213
DELISTED
Pfenex Inc.
PFNX
$13.7M 0.08%
2,224,381
+462,925
+26% +$2.03M
APD icon
214
Air Products & Chemicals
APD
$65.7B
$13.7M 0.08%
71,666
-1,838
-3% -$316K
CMG icon
215
Chipotle Mexican Grill
CMG
$43.7B
$13.5M 0.08%
953,350
-363,400
-28% -$4.22M
BP icon
216
BP
BP
$106B
$13.5M 0.08%
314,063
-25,063
-7% -$1.03M
PXD
217
DELISTED
Pioneer Natural Resource Co.
PXD
$13.4M 0.08%
87,859
-10,491
-11% -$1.48M
MO icon
218
Altria Group
MO
$114B
$13.4M 0.08%
232,911
+15,396
+7% +$787K
C icon
219
Citigroup
C
$231B
$13.2M 0.08%
211,505
+3,321
+2% +$206K
BL icon
220
BlackLine
BL
$1.79B
$13.1M 0.08%
282,679
-2,441
-0.9% -$115K
VO icon
221
Vanguard Morningstar Mid-Cap ETF
VO
$109B
$13.1M 0.08%
325,612
+15,952
+5% +$614K
BAX icon
222
Baxter International
BAX
$14.1B
$13M 0.08%
159,656
-14,999
-9% -$1.09M
SPMD icon
223
State Street SPDR Portfolio S&P 400 Mid Cap ETF
SPMD
$18.7B
$12.8M 0.08%
383,510
+92,525
+32% +$3.02M
PRLB icon
224
Protolabs
PRLB
$2.16B
$12.8M 0.08%
121,471
+6,061
+5% +$680K
SCHW
225
Charles Schwab
SCHW
$188B
$12.7M 0.08%
295,989
+37,336
+14% +$1.69M
7 8
9
10 11

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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 TotalEnergies, an estimated $155M.

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 TotalEnergies, cutting an estimated $155M.
  • 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.