Marvell Technology to join S&P 500 after passing profitability test

Marvell Technology has earned its ticket to the S&P 500, the most exclusive club in American equities. S&P Dow Jones Indices announced on June 5 that the semiconductor company will join the benchmark index effective June 22, before market open, replacing Pool Corp.

Shares of Marvell rose nearly 6% in after-hours trading following the announcement.

How Marvell cleared the bar

Getting into the S&P 500 isn’t just about being big. You have to be profitable. Specifically, a company needs positive GAAP earnings in its most recent quarter and positive cumulative earnings over its trailing four quarters. Marvell cleared both hurdles, reporting GAAP profit for Q4 (ended December) and across its trailing four-quarter stretch.

Marvell has been riding a wave of demand for semiconductors purpose-built for AI infrastructure and data centers. The company has been designing custom silicon and networking chips that serve as the connective tissue inside hyperscale data centers.

Nvidia invested $2 billion in Marvell, a partnership that signals deep confidence in Marvell’s role within the AI supply chain.

As part of the same quarterly rebalance, Flex Ltd. will replace Campbell’s in the index.

Why the S&P 500 matters more than prestige

Trillions of dollars in passive investment funds track the S&P 500. Every index fund, every ETF benchmarked to it, every target-date retirement fund with an S&P 500 allocation: they all have to buy Marvell shares when it officially enters the index.

The inclusion also increases the technology sector’s overall weight within the S&P 500.

What this means for investors

Index eligibility is backward-looking. It confirms what already happened, not what might happen. Marvell didn’t get added because analysts think it will be profitable. It got added because it already is.

The nearly 6% after-hours pop prices in some of the passive flow benefit immediately. History shows that stocks added to the S&P 500 sometimes give back their initial gains in the weeks following their actual inclusion date, as the forced buying subsides and fundamentals reassert control.

With Nvidia as both a partner and a $2 billion investor, Marvell occupies a unique position in the AI supply chain. If Nvidia decides to bring more of Marvell’s capabilities in-house, or if the partnership dynamics shift, the calculus changes quickly.

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