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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
DOV icon
526
Dover
DOV
$28.4B
$2.2M 0.01%
23,492
+2,395
+11% +$207K
WMGI
527
DELISTED
Wright Medical Group Inc
WMGI
$2.2M 0.01%
69,941
-2,270
-3% -$68.9K
INXN
528
DELISTED
Interxion Holding N.V.
INXN
$2.2M 0.01%
32,968
+297
+0.9% +$18.4K
CBLK
529
DELISTED
Carbon Black, Inc. Common Stock
CBLK
$2.2M 0.01%
157,590
+121,848
+341% +$1.74M
SBAC icon
530
SBA Communications
SBAC
$19.5B
$2.19M 0.01%
10,962
+4,132
+60% +$749K
MAT icon
531
Mattel
MAT
$4.3B
$2.18M 0.01%
167,752
+48,324
+40% +$646K
KRYS icon
532
Krystal Biotech
KRYS
$9.66B
$2.18M 0.01%
66,206
+44,426
+204% +$1.05M
RNG icon
533
RingCentral
RNG
$5.28B
$2.18M 0.01%
20,188
-252
-1% -$24.8K
CERN
534
DELISTED
Cerner Corp
CERN
$2.17M 0.01%
37,891
-6,417
-14% -$357K
G icon
535
Genpact
G
$5.81B
$2.17M 0.01%
61,572
-5,054
-8% -$160K
IHI icon
536
iShares US Medical Devices ETF
IHI
$3.38B
$2.16M 0.01%
55,950
+7,794
+16% +$283K
MMI icon
537
Marcus & Millichap
MMI
$1.19B
$2.16M 0.01%
52,954
+3,247
+7% +$124K
SHLX
538
DELISTED
Shell Midstream Partners, L.P.
SHLX
$2.15M 0.01%
105,322
-3,400
-3% -$65.2K
HEP
539
DELISTED
Holly Energy Partners, L.P.
HEP
$2.14M 0.01%
79,252
-1,180
-1% -$34.3K
WIFI
540
DELISTED
Boingo Wireless, Inc.
WIFI
$2.14M 0.01%
91,835
+35,460
+63% +$807K
ROST icon
541
Ross Stores
ROST
$81.9B
$2.12M 0.01%
22,807
+3,229
+16% +$296K
RYN icon
542
Rayonier
RYN
$6.55B
$2.12M 0.01%
74,016
-26,962
-27% -$719K
YUM icon
543
Yum! Brands
YUM
$41.1B
$2.11M 0.01%
21,116
-4,421
-17% -$419K
DDD icon
544
3D Systems Corp
DDD
$613M
$2.11M 0.01%
195,800
-16,300
-8% -$194K
DLTH icon
545
Duluth Holdings
DLTH
$159M
$2.1M 0.01%
88,190
+7,940
+10% +$189K
ALL icon
546
Allstate
ALL
$67.5B
$2.08M 0.01%
22,123
+399
+2% +$36.1K
EFII
547
DELISTED
Electronics for Imaging
EFII
$2.07M 0.01%
76,943
+11,815
+18% +$311K
AMLP icon
548
Alerian MLP ETF
AMLP
$12.8B
$2.07M 0.01%
41,234
+2,837
+7% +$139K
AVGO icon
549
Broadcom
AVGO
$2.04T
$2.06M 0.01%
68,340
+19,290
+39% +$523K
LII icon
550
Lennox International
LII
$15.2B
$2.06M 0.01%
7,770
-10
-0.1% -$2.39K
20 21
22
23 24

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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.