Entegris set to join s&p midcap 400

New york , feb. 27, 2025 /prnewswire/ -- entegris inc. (nasd: entg) will replace arcadium lithium plc (nyse: altm) in the s&p midcap 400 effective prior to the opening of trading on thursday, march 6. rio tinto plc (asx: rio) is acquiring arcadium lithium in a deal expected to be completed soon, pending final closing conditions.

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