Allison Transmission Holdings Set to Join S&P MidCap 400 and Goodyear Tire & Rubber to Join S&P SmallCap 600

NEW YORK, June 30, 2026 /PRNewswire/ — Allison Transmission Holdings Inc. (NYSE: ALSN) will replace Goodyear Tire & Rubber Co. (NASD: GT) in the S&P MidCap 400, and Goodyear Tire & Rubber will replace Stellar Bancorp Inc. (NYSE: STEL) in the S&P SmallCap 600 effective prior to the…