Marvell Technology and Flex Set to Join S&P 500; Others to Join S&P MidCap 400 and S&P SmallCap 600

NEW YORK, June 5, 2026 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P 500, S&P MidCap 400, and S&P SmallCap 600 indices effective prior to the open of trading on Monday, June 22, 2026, to coincide with the quarterly rebalance. The changes ensure that each...