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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
+10.92%
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
$16.3B
AUM Growth
+$1.62B
Cap. Flow
+$161M
Cap. Flow %
0.98%
Top 10 Hldgs %
21.12%
Holding
1,696
New
110
Increased
623
Reduced
570
Closed
77

Top Buys

Rank Stock Value
1
DLB icon
Dolby
DLB
+$37M
2
DSI icon
iShares MSCI KLD 400 Social ETF
DSI
+$20M
3
PGR icon
Progressive
PGR
+$19.6M
4
KMX icon
CarMax
KMX
+$19.2M
5
TYL icon
Tyler Technologies
TYL
+$18.5M

Top Sells

Rank Stock Value
1
SBUX icon
Starbucks
SBUX
+$35.1M
2
META icon
Meta Platforms (Facebook)
META
+$18.3M
3
INGN icon
Inogen
INGN
+$14.6M
4
MKTX icon
MarketAxess Holdings
MKTX
+$13M
5
PF
Pinnacle Foods, Inc.
PF
+$12.6M

Sector Composition

Rank Sector Weight
1 Technology 21.34%
2 Healthcare 18.9%
3 Financials 12.91%
4 Industrials 9.71%
5 Consumer Discretionary 9.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ROL icon
251
Rollins
ROL
$17.5B
$10.2M 0.06%
377,892
+97,112
+35% +$2.51M
PFNX
252
DELISTED
Pfenex Inc.
PFNX
$10.2M 0.06%
1,989,990
+70,239
+4% +$361K
BFH icon
253
Bread Financial
BFH
$4.49B
$10.1M 0.06%
53,542
+4,825
+10% +$910K
SITE icon
254
SiteOne Landscape Supply
SITE
$4.29B
$10.1M 0.06%
133,917
-21,367
-14% -$1.87M
TSCO icon
255
Tractor Supply
TSCO
$17.8B
$10M 0.06%
551,460
-37,370
-6% -$622K
JWN
256
DELISTED
Nordstrom
JWN
$10M 0.06%
167,457
-78,878
-32% -$4.52M
URI icon
257
United Rentals
URI
$71.9B
$9.88M 0.06%
60,405
+49,648
+462% +$7.73M
VNQI icon
258
Vanguard Global ex-US Real Estate ETF
VNQI
$3.51B
$9.81M 0.06%
174,571
+1,639
+0.9% +$94.3K
CCOI icon
259
Cogent Communications
CCOI
$573M
$9.73M 0.06%
174,443
-100
-0.1% -$5.36K
VO icon
260
Vanguard Morningstar Mid-Cap ETF
VO
$108B
$9.72M 0.06%
236,908
+17,412
+8% +$711K
IWF icon
261
iShares Russell 1000 Growth ETF
IWF
$127B
$9.6M 0.06%
246,244
+1,584
+0.6% +$60K
TECH icon
262
Bio-Techne
TECH
$11.2B
$9.59M 0.06%
187,872
+1,400
+0.8% +$62K
ITOT icon
263
iShares Core S&P Total US Stock Market ETF
ITOT
$97.1B
$9.41M 0.06%
141,291
+6,690
+5% +$438K
TJX icon
264
TJX Companies
TJX
$178B
$9.34M 0.06%
166,670
-1,136
-0.7% -$58.4K
EPAY
265
DELISTED
Bottomline Technologies Inc
EPAY
$9.12M 0.06%
125,356
-695
-0.6% -$42.5K
DVY icon
266
iShares Select Dividend ETF
DVY
$23.5B
$9.04M 0.06%
90,640
+953
+1% +$95.5K
MBFI
267
DELISTED
MB Financial Corp
MBFI
$9.03M 0.06%
195,752
+45,903
+31% +$2.21M
RAMP icon
268
LiveRamp
RAMP
$2.3B
$8.89M 0.05%
179,865
-18,043
-9% -$799K
EL icon
269
Estee Lauder
EL
$31B
$8.88M 0.05%
61,098
-57,996
-49% -$8.05M
SPSB icon
270
State Street SPDR Portfolio Short Term Corporate Bond ETF
SPSB
$10.6B
$8.86M 0.05%
293,615
+155,630
+113% +$4.7M
MRCY icon
271
Mercury Systems
MRCY
$6.63B
$8.73M 0.05%
157,821
-15,245
-9% -$738K
NVRO
272
DELISTED
NEVRO CORP.
NVRO
$8.66M 0.05%
151,994
-17,365
-10% -$1.09M
NEE icon
273
NextEra Energy
NEE
$175B
$8.57M 0.05%
204,656
-4,464
-2% -$190K
ROK icon
274
Rockwell Automation
ROK
$49.5B
$8.56M 0.05%
45,673
+27,049
+145% +$4.84M
SRCL
275
DELISTED
Stericycle Inc
SRCL
$8.56M 0.05%
145,936
-9,668
-6% -$617K
9 10
11
12 13

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William Blair & Company's Q3 2018 Portfolio in Review

As of Q3 2018, William Blair & Company held 1,696 positions worth $16.3B, up 11% from $14.7B the previous quarter. Its ten largest holdings account for 21% of the portfolio.

William Blair & Company's Q3 2018 filing shows 110 new, 623 increased, 570 reduced and 77 closed positions. Its largest new stake was Marvell Technology: 234,218 shares worth $4.52M. The largest sale was Starbucks, an estimated $35.1M.

By sector, the portfolio is most concentrated in Technology at 21% of assets, up from 20% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q3 2018 buy was Marvell Technology: 234,218 shares worth $4.52M.
  • William Blair & Company added most to Dolby in Q3 2018, an estimated $37M increase.
  • William Blair & Company's biggest Q3 2018 reduction was Starbucks, cutting an estimated $35.1M.
  • William Blair & Company fully exited Williams Partners L.P. in Q3 2018, selling an estimated $7.8M.
  • William Blair & Company's ten largest holdings make up 21% of its $16.3B portfolio in Q3 2018.
  • William Blair & Company opened 110 new positions and closed 77 in Q3 2018.
  • William Blair & Company's portfolio value rose 11% quarter-over-quarter to $16.3B.

Based on William Blair & Company's 13F filing for Q3 2018, filed 13 Nov 2018.