SanDisk (SNDK.US) will join the S&P 500, and several companies will enter the small-cap 600 index.

SanDisk (SNDK.US) will join the S&P 500 Index before trading on November 28, 2025, replacing the Interpublic Group of Companies, Inc. (IPG.US). PTC Therapeutics (PTCT.US) will replace SanDisk before trading on November 28 and join the S&P SmallCap 600 Index. At the same time, Upwork (UPWK.US) will replace Premier (PINC.US) before the same day's opening and join the S&P SmallCap 600 Index. It is worth noting that Patient Square Capital's acquisition of Premier is expected to be completed on November 25. First Interstate BancSystem (FIBK.US) will replace Hanesbrands Inc. (HBI.US) before trading on December 2 and join the S&P SmallCap 600 Index. Gildan Activewear Inc.'s acquisition of Hanesbrands Inc. is expected to be completed on December 1.