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…