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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
+23.04%
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
$16.4B
AUM Growth
+$2.69B
Cap. Flow
+$306M
Cap. Flow %
1.86%
Top 10 Hldgs %
21%
Holding
1,770
New
129
Increased
754
Reduced
490
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
PKOH icon
426
Park-Ohio Holdings
PKOH
$670M
$3.59M 0.02%
110,917
-28,236
-20% -$914K
PCYO icon
427
Pure Cycle
PCYO
$257M
$3.58M 0.02%
363,505
– –
PHO icon
428
Invesco Water Resources ETF
PHO
$2.08B
$3.58M 0.02%
105,338
-25,784
-20% -$822K
MGK icon
429
Vanguard Morningstar Mega Cap Growth ETF
MGK
$33.9B
$3.55M 0.02%
142,755
+4,630
+3% +$109K
MAIN icon
430
Main Street Capital
MAIN
$5.28B
$3.55M 0.02%
95,371
-11,230
-11% -$418K
SITE icon
431
SiteOne Landscape Supply
SITE
$4.3B
$3.51M 0.02%
61,423
-12,257
-17% -$669K
COF icon
432
Capital One
COF
$135B
$3.39M 0.02%
41,540
-596
-1% -$48.4K
BLBD icon
433
Blue Bird Corp
BLBD
$2.09B
$3.38M 0.02%
199,383
+760
+0.4% +$14.3K
TLT icon
434
iShares 20+ Year Treasury Bond ETF
TLT
$41.6B
$3.37M 0.02%
26,643
+10,966
+70% +$1.33M
VRTX icon
435
Vertex Pharmaceuticals
VRTX
$123B
$3.36M 0.02%
18,259
+10,327
+130% +$1.91M
PNC icon
436
PNC Financial Services
PNC
$101B
$3.33M 0.02%
27,111
+3,765
+16% +$466K
HAL icon
437
Halliburton
HAL
$27.1B
$3.31M 0.02%
113,135
+10,884
+11% +$329K
ACWI icon
438
iShares MSCI ACWI ETF
ACWI
$33.3B
$3.29M 0.02%
45,625
+2,075
+5% +$144K
HYMB icon
439
State Street SPDR Nuveen ICE High Yield Municipal Bond ETF
HYMB
$3.18B
$3.29M 0.02%
114,482
-5,186
-4% -$146K
TRU icon
440
TransUnion
TRU
$15.2B
$3.27M 0.02%
48,974
+7,459
+18% +$462K
PSXP
441
DELISTED
PHILLIPS 66 PARTNERS LP
PSXP
$3.27M 0.02%
62,375
-1,178
-2% -$59K
WEC icon
442
WEC Energy
WEC
$35.2B
$3.23M 0.02%
40,803
+2,467
+6% +$183K
SO icon
443
Southern Company
SO
$107B
$3.19M 0.02%
61,784
+2,076
+3% +$102K
SRCL
444
DELISTED
Stericycle Inc
SRCL
$3.18M 0.02%
58,490
-18,914
-24% -$856K
ODFL icon
445
Old Dominion Freight Line
ODFL
$44B
$3.15M 0.02%
65,451
+507
+0.8% +$23.7K
XBI icon
446
State Street SPDR S&P Biotech ETF
XBI
$10.1B
$3.13M 0.02%
34,608
+26,046
+304% +$2.22M
IGSB icon
447
iShares 1-5 Year Investment Grade Corporate Bond ETF
IGSB
$23B
$3.12M 0.02%
30,114
+4,036
+15% +$211K
GGT
448
Gabelli Multimedia Trust
GGT
$173M
$3.11M 0.02%
362,813
-18,338
-5% -$148K
BKI
449
DELISTED
Black Knight, Inc. Common Stock
BKI
$3.11M 0.02%
57,082
-9,106
-14% -$459K
DAY
450
DELISTED
Dayforce
DAY
$3.11M 0.02%
+60,625
New +$2.68M
16 17
18
19 20

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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, 754 increased, 490 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.