Marvell Technology becomes a member of the S&P 500 before the opening bell on Monday, June 22. S&P Dow Jones Indices announced the change on June 5; Marvell and Flex enter the benchmark in the quarterly rebalance, replacing Pool Corp and Campbell’s. For an index that already carries Broadcom, Nvidia, and a deepening bench of AI silicon, the addition reads less as a revelation than as a formality the tape priced in weeks ago.