Avantor will be added to the S&P MidCap 400 index, while QuidelOrtho and Schneider National will be added to the S&P SmallCap 600 index.

Avantor Set to Join S&P MidCap 400; QuidelOrtho & Schneider National to Join S&P SmallCap 600 Avantor Set to Join S&P MidCap 400; QuidelOrtho & Schneider National to Join S&P SmallCap 600 PR Newswire…

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