S&P 500 Adds Marvell Technology and Flex

S&P Dow Jones Indices added semiconductor company Marvell Technology and electronics manufacturer Flex to the S&P 500 index effective June 22, 2026. The additions were part of a quarterly rebalance that replaced Pool Corp and The Campbell's Company, both of which moved to the S&P SmallCap 600 index.

Marvell Technology secured its position after meeting GAAP profitability requirements for the quarter ending December and the previous four quarters. The company's market value reached $276.81 billion as shares more than tripled this year, driven by demand for AI-related custom chips and cloud-computing data center infrastructure. The growth was further catalyzed by a $2 billion investment from Nvidia and public endorsements from Nvidia CEO Jensen Huang, who characterized the chipmaker as a future trillion-dollar company.

Flex entered the index following profit guidance for 2027 that exceeded consensus estimates. The electronics manufacturing services provider is currently planning to spin off its cloud and power infrastructure business. Following the announcement, Marvell and Flex shares saw immediate increases, with Marvell's stock rising up to 10.4% in early trading on June 8.

Additionally, the index provider maintained its strict eligibility requirements, including a 12-month seasoning period and profitability standards, which prevents mega-cap IPOs such as SpaceX from receiving fast-track entry.