William Blair Investment Management
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William Blair Investment Management’s Ecovyst ECVT Stock Holding History

William Blair Investment Management’s Portfolio ECVT Stock Details ECVT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$24M Sell
1,864,621
-864,128
-32% -$9.76M 0.08% 234
2025
Q4 		$26.6M Sell
2,728,749
-285,411
-9% -$2.49M 0.07% 230
2025
Q3 		$26.4M Sell
3,014,160
-182,742
-6% -$1.61M 0.07% 246
2025
Q2 		$26.3M Sell
3,196,902
-264,414
-8% -$1.86M 0.07% 244
2025
Q1 		$21.5M Sell
3,461,316
-140,030
-4% -$1.04M 0.06% 283
2024
Q4 		$27.5M Buy
3,601,346
+67,338
+2% +$498K 0.07% 271
2024
Q3 		$24.2M Sell
3,534,008
-108,665
-3% -$828K 0.06% 279
2024
Q2 		$32.7M Sell
3,642,673
-7,731
-0.2% -$74.8K 0.09% 204
2024
Q1 		$40.7M Buy
3,650,404
+334,004
+10% +$3.16M 0.11% 179
2023
Q4 		$32.4M Sell
3,316,400
-54,209
-2% -$516K 0.09% 212
2023
Q3 		$33.2M Buy
3,370,609
+130,210
+4% +$1.39M 0.11% 182
2023
Q2 		$37.1M Buy
+3,240,399
New +$35.3M 0.12% 177

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