Marvell (MRVL) Poised for S&P 500 Inclusion as Quarterly Rebalance Looms

S&P Dow Jones Indices is expected to announce on Friday, June 6, 2026, that Marvell Technology (MRVL-US) will join the S&P 500, after the chipmaker missed out in the previous two quarterly reviews. With a market value of roughly $264 billion as of Wednesday’s close, Marvell is by far the largest eligible candidate; its nearest rival, Bloom Energy, has a market cap of $82 billion. MRVL shares jumped nearly 5% on Thursday, extending year-to-date gains past 200%. Jefferies’ trading desk told clients the market “broadly anticipates” the inclusion. Stephens analyst Melissa Roberts noted that Marvell qualified on profitability at end-2025 and averaged a market cap of about $54 billion over the past year, underscoring its stability. While the index committee has full discretion, it may also weigh sector balance—technology is underweighted in the S&P 500 versus the broader market. Flex (FLEX-US), a $59 billion electronic manufacturer, is another large tech candidate that could be promoted from the S&P MidCap 400. In March, the committee added two optical-communication companies simultaneously, signaling openness to multiple additions from the same industry.