US memory chip makers' shares rise after report says Samsung delayed DDR5 pricing

** Shares of data storage cos rise premarket after report says Samsung Electronics 005930 delays DDR5 contract pricing as spot prices triple

** Micron Technology MU climbs 4.47% to $233.78, while SanDisk SNDK jumps 6.56% to $212.70, leading gains among memory makers

** Western Digital WDC adds 2.79% to $154.20 and Seagate Technology STX rises 4.36% to $267.03

** A report from DIGITIMES says Samsung halted setting prices for DDR5 memory chips in October, pushing announcements to mid-November as spot prices surged

** The move signals tightening supply and rising prices, which typically boosts revenue and margins for firms such as MU, SNDK, WDC and STX