Seagate (STX) rose 17% premarket, aiming for fresh record highs after a strong report. Multiple firms raised targets: Morgan Stanley to $767, Mizuho to $700, and Citi to $740. Mizuho sees Mosaic4 driving over 50% of HAMR exabytes by 2027. Citi noted demand remains stronger than expected. STX is on track for its best day in nearly a year.