Marvell Technology Group Ltd is trading 3.4% up at $298.64 in pre-market, extending a sharp rally following news that the company will be added to the S&P 500 index later in June.
- The stock surged approximately 10% on June 8, 2026, driven by the index inclusion announcement and positive management commentary regarding AI data center demand.
- Pre-market strength indicates continued index-fund positioning and follow-through buying interest, outpacing the relatively modest gains seen in broader index futures.