Seagate Technology PLC shares surged 5.09% in a 24-hour period, extending a powerful post-earnings rally as investors cheered the company's fiscal fourth-quarter results and an exceptionally bullish forward guidance that far exceeded Wall Street expectations.

The storage giant reported quarterly revenue of $3.629 billion, a 48% year-over-year increase that beat the consensus estimate of $3.485 billion. Adjusted earnings per share came in at $5.71, soaring 120% from a year earlier and topping forecasts by roughly 12%. Even more critically, the company guided for fiscal first-quarter 2027 revenue of $4.0–$4.2 billion, well above the Street's $3.75 billion estimate, with adjusted EPS of approximately $7.30 versus the $5.80 consensus. The blockbuster guidance reflects robust, sustained demand for mass-capacity storage driven by the artificial intelligence buildout.

Sentiment was further bolstered by a wave of analyst price-target hikes following the report, with firms including Citi, Wells Fargo, JPMorgan, and Wedbush lifting their targets. A broader rally in semiconductor and memory stocks—triggered by Microsoft's upbeat AI spending commentary and Samsung's outlook for persistent memory shortages—also provided a tailwind. Seagate's successful ramp of Heat-Assisted Magnetic Recording technology and the locking of cloud data center capacity through 2028 underscored the company's strategic positioning in the AI-driven storage cycle.