William Blair Investment Management
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William Blair Investment Management’s TransDigm Group TDG Stock Holding History

Quarter Market Value Status Shares Shares
Change %
Trade Value Portfolio Weight Portfolio Position
2018
Q4
Sell
-104,460
Closed -$38.9M 433
2018
Q3
$38.9M Sell
104,460
-2,947
-3% -$1.1M 0.13% 172
2018
Q2
$37.1M Sell
107,407
-3,273
-3% -$1.13M 0.14% 170
2018
Q1
$34M Sell
110,680
-14,775
-12% -$4.54M 0.13% 171
2017
Q4
$34.5M Sell
125,455
-47,674
-28% -$13.1M 0.13% 175
2017
Q3
$44.3M Sell
173,129
-61,505
-26% -$15.7M 0.16% 154
2017
Q2
$63.1M Sell
234,634
-10,170
-4% -$2.73M 0.23% 122
2017
Q1
$53.9M Sell
244,804
-846,941
-78% -$186M 0.2% 138
2016
Q4
$272M Sell
1,091,745
-62,558
-5% -$15.6M 1.09% 17
2016
Q3
$334M Buy
1,154,303
+3,895
+0.3% +$1.13M 1.26% 5
2016
Q2
$303M Buy
1,150,408
+52,169
+5% +$13.8M 1.2% 10
2016
Q1
$242M Buy
1,098,239
+73,282
+7% +$16.1M 0.96% 20
2015
Q4
$234M Buy
1,024,957
+127,361
+14% +$29.1M 0.95% 27
2015
Q3
$191M Buy
+897,596
New +$191M 0.39% 68