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William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $30.3B
1-Year Est. Return 33.75%
This Fund
S&P 500
This Quarter Est. Return
+8.82%
1 Year Est. Return
+33.75%
3 Year Est. Return
+108.55%
5 Year Est. Return
+126.9%
10 Year Est. Return
+788.31%
AUM
$27.9B
AUM Growth
+$434M
Cap. Flow
-$1.39B
Cap. Flow %
-4.97%
Top 10 Hldgs %
16.81%
Holding
485
New
38
Increased
170
Reduced
217
Closed
52

Top Buys

Rank Stock Value
1
RCI icon
Rogers Communications
RCI
+$124M
2
WEX icon
WEX
WEX
+$108M
3
DXCM icon
DexCom
DXCM
+$100M
4
TSM icon
TSMC
TSM
+$99.8M
5
YELP icon
Yelp
YELP
+$93.8M

Top Sells

Rank Stock Value
1
ORLY icon
O'Reilly Automotive
ORLY
+$155M
2
SBNY
Signature Bank
SBNY
+$152M
3
ODFL icon
Old Dominion Freight Line
ODFL
+$132M
4
BABA icon
Alibaba
BABA
+$128M
5
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$119M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 15.32%
2 Industrials 13.97%
3 Financials 13.47%
4 Technology 12.68%
5 Healthcare 12.14%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BIIB icon
151
Biogen
BIIB
$30.6B
$47.4M 0.17%
151,336
-53,771
-26% -$15.9M
MCHP icon
152
Microchip Technology
MCHP
$44.3B
$47.1M 0.17%
+1,048,222
New +$43.9M
ULTI
153
DELISTED
Ultimate Software Group Inc
ULTI
$44.8M 0.16%
236,139
+136,213
+136% +$27.5M
TDG icon
154
TransDigm Group
TDG
$67.6B
$44.3M 0.16%
173,129
-61,505
-26% -$16.6M
BSX icon
155
Boston Scientific
BSX
$73.2B
$44.2M 0.16%
1,513,563
-19,892
-1% -$549K
INTU icon
156
Intuit
INTU
$90.6B
$42.7M 0.15%
300,751
-106,818
-26% -$14.7M
SCCO icon
157
Southern Copper
SCCO
$170B
$42.3M 0.15%
+1,146,738
New +$41.5M
EOG icon
158
EOG Resources
EOG
$73.7B
$41.6M 0.15%
430,039
+148,783
+53% +$13.4M
SINA
159
DELISTED
Sina Corp
SINA
$40.9M 0.15%
356,987
-63,537
-15% -$6.42M
RGEN icon
160
Repligen
RGEN
$9.18B
$40.6M 0.15%
1,059,935
+959
+0.1% +$40.2K
CCL icon
161
Carnival Corporation Ltd
CCL
$38.8B
$39.9M 0.14%
+617,681
New +$41.3M
ASR icon
162
Grupo Aeroportuario del Sureste
ASR
$8.15B
$39M 0.14%
204,321
-27,490
-12% -$5.69M
SLB icon
163
SLB Ltd
SLB
$77.8B
$38.6M 0.14%
552,822
-689,003
-55% -$45.6M
GBCI icon
164
Glacier Bancorp
GBCI
$6.3B
$38.5M 0.14%
1,019,631
+286,202
+39% +$9.91M
WSO icon
165
Watsco Inc
WSO
$13.5B
$37.9M 0.14%
235,432
-3,094
-1% -$467K
FM
166
DELISTED
iShares Frontier and Select EM ETF
FM
$37.6M 0.13%
1,201,550
-138,900
-10% -$4.17M
PPG icon
167
PPG Industries
PPG
$25.9B
$37.3M 0.13%
343,562
-122,097
-26% -$13M
CPA icon
168
Copa Holdings
CPA
$5.65B
$36.3M 0.13%
291,780
-25,929
-8% -$3.28M
CERN
169
DELISTED
Cerner Corp
CERN
$36.1M 0.13%
506,127
-179,820
-26% -$11.9M
NKE icon
170
Nike
NKE
$62.4B
$35.9M 0.13%
693,330
-8,880
-1% -$498K
IDXX icon
171
Idexx Laboratories
IDXX
$47B
$35.5M 0.13%
228,366
-215,105
-49% -$34M
LRCX icon
172
Lam Research
LRCX
$387B
$35.1M 0.13%
1,898,920
-25,230
-1% -$409K
NFLX icon
173
Netflix
NFLX
$315B
$34.3M 0.12%
1,889,040
-25,440
-1% -$444K
SHOO icon
174
Steven Madden
SHOO
$3.6B
$33.2M 0.12%
1,149,846
+122,502
+12% +$3.37M
TILE icon
175
Interface
TILE
$2.2B
$32.3M 0.12%
1,472,735
+113,908
+8% +$2.22M
5 6
7
8 9

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William Blair Investment Management's Q3 2017 Portfolio in Review

As of Q3 2017, William Blair Investment Management held 485 positions worth $27.9B, up 1.6% from $27.5B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

William Blair Investment Management withdrew a net $1.39B in Q3 2017, closing 52 positions and reducing 217 holdings. Its most notable exit was Amedisys, an estimated $91.9M position sold in full.

By sector, the portfolio is most concentrated in Consumer Discretionary at 15% of assets, down from 16% a quarter earlier, followed by Industrials and Financials.

Against the trend, William Blair Investment Management opened a new position in Rogers Communications worth $125M.

  • William Blair Investment Management's largest Q3 2017 buy was Rogers Communications: 2,429,600 shares worth $125M.
  • William Blair Investment Management added most to TSMC in Q3 2017, an estimated $99.8M increase.
  • William Blair Investment Management's biggest Q3 2017 reduction was O'Reilly Automotive, cutting an estimated $155M.
  • William Blair Investment Management fully exited Amedisys in Q3 2017, selling an estimated $91.9M.
  • William Blair Investment Management's ten largest holdings make up 17% of its $27.9B portfolio in Q3 2017.
  • William Blair Investment Management opened 38 new positions and closed 52 in Q3 2017.
  • William Blair Investment Management's portfolio value rose 1.6% quarter-over-quarter to $27.9B.

Based on William Blair Investment Management's 13F filing for Q3 2017, filed 13 Nov 2017.