Entegris Set to Join S&P MidCap 400

Core Points - Entegris Inc. will replace Arcadium Lithium plc in the S&P MidCap 400 effective March 6, 2025 [1] - Rio Tinto plc is acquiring Arcadium Lithium, with the deal expected to be completed soon [1] Summary by Category Index Changes - Effective March 6, 2025, Entegris will be added to the S&P MidCap 400 under the ticker ENTG in the Information Technology sector [1] - Arcadium Lithium will be deleted from the S&P MidCap 400 under the ticker ALTM in the Materials sector [1]