American Superconductor shares surge 15.21% premarket after Q3 revenue and EPS beat, Comtrafo acquisition, and upgraded analyst ratings.

American Superconductor surged 15.21% in premarket trading following the release of its Q3 fiscal 2025 earnings, which showed a 1773.33% EPS beat, $74 million in revenue (up 20% YoY), and a 31% gross margin. The company also provided optimistic Q4 guidance, projecting revenue above $80 million and highlighted a $250 million+ backlog. The Comtrafo acquisition, completed in December 2025, contributed $4.6 million in Q3 revenue and expanded AMSC’s transformer capabilities. Analysts upgraded the stock to Strong Buy, citing improved EBITDA margin potential and strategic diversification into data centers and traditional energy. A tax benefit of $113.1 million boosted GAAP net income to $117.8 million, though non-GAAP results underscored operational strength. The premarket rally reflects investor confidence in AMSC’s diversified growth drivers, margin expansion, and execution on large orders.