** Shares of data-storage companies climb in premarket trading as Seagate Technology's STX.O upbeat forecast boosts confidence in enterprise AI spending
** Seagate surges 17.8%, Western Digital WDC.O up 9.9%, Micron Technology MU.O gain 4.1% and SanDisk SNDK.O rises 6.3%.
** If gains hold, the four storage technology companies are set to add about $42 bln in combined market value
** Memory and data-storage stocks continue to surge in 2026, building on a stellar 2025, as demand for hard drives soars in the global race to expand AI-related infrastructure
** As of last close, YTD gains are 126.9% for WDC, 110.3% for STX, 76.8% for MU and 322.2% for SNDK
(Reporting by Ragini Mathur in Bengaluru)
((Ragini.Mathur@thomsonreuters.com;))