William Blair Investment Management
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William Blair Investment Management’s Atmus Filtration Technologies ATMU Stock Holding History

William Blair Investment Management’s Portfolio ATMU Stock Details ATMU Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Shares
Change % 		Capital Flow Portfolio Weight Portfolio Position
2025
Q2 		$29M Sell
797,283
-62,808
-7% -$2.29M 0.08% 222
2025
Q1 		$31.6M Buy
+860,091
New +$31.6M 0.09% 209