S&P Dow Jones Indices will add chipmaker Marvell Technology and manufacturer Flex to the S&P 500. The changes take effect before the market opens on Monday, June 22, 2026. Marvell and Flex will replace Pool Corporation and Campbell Soup Company during the quarterly rebalance.
Marvell shares fell 16.7% during regular Friday trading amid a broader semiconductor sell-off. The stock jumped over 6% in after-hours trading following the index announcement. Flex shares also gained 4% in aftermarket trading.