Seagate Technology (STX) stock surged nearly 7% in premarket trading after reporting strong quarterly results and upbeat demand for high-capacity storage products. Baird raised its price target to $270 from $188, implying 21% upside. CEO Dave Mosley said the company performance reflects solid execution. Seagate has rallied 163% since April, ranking as the fourth-best S&P 500 performer this year.