S&P Dow Jones Indices, a division of S&P Global, announced changes to its benchmark indexes effective prior to the market open on November 28, 2025. These adjustments are part of regular index maintenance. The most notable change involves Sandisk Corp. joining the prestigious S&P 500. In addition to the S&P 500 change, Upwork Inc. will be added to the S&P SmallCap 600. These changes were prompted by acquisition activity, with Sandisk replacing The Interpublic Group of Companies and Upwork replacing Premier Inc. Such rebalancings are crucial for ensuring the indexes accurately reflect market dynamics but are considered a routine part of S&P Global's business operations.