William Blair Investment Management
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William Blair Investment Management’s Masimo MASI Stock Holding History

Quarter Market Value Status Shares Shares
Change %
Trade Value Portfolio Weight Portfolio Position
2021
Q3
Sell
-431,775
Closed -$105M 478
2021
Q2
$105M Sell
431,775
-6,508
-1% -$1.58M 0.33% 103
2021
Q1
$101M Sell
438,283
-1,161
-0.3% -$267K 0.33% 102
2020
Q4
$118M Sell
439,444
-5,744
-1% -$1.54M 0.39% 93
2020
Q3
$105M Sell
445,188
-7,183
-2% -$1.7M 0.41% 90
2020
Q2
$103M Sell
452,371
-351,959
-44% -$80.2M 0.42% 93
2020
Q1
$142M Buy
+804,330
New +$142M 0.69% 45