EPS Rises 125%... Semiconductor Stocks Benefiting from Auto and Data Centers Drop 7%

Allegro MicroSystems, Inc. (NASDAQ: ALGM) closed at $47.41 on the 28th (local time), down 7.2%. Its market capitalization stands at about $8.8 billion (approximately ₩11 trillion), with roughly $600 million (around ₩800 billion) erased in a single day.

Despite reporting on May 7 that fourth-quarter fiscal 2026 revenue rose 26% year-over-year and non-GAAP EPS jumped 125%, the stock plunged 16% on the announcement day and has remained under pressure. The company has continued its institutional investor relations efforts—most recently with the CFO’s fireside chat at the TD Cowen TMT Conference on May 27—and is broadening its current-sensor portfolio with new products such as the ultra-high-precision Hall-effect current sensor ACS37017. ()

Allegro MicroSystems is a U.S. fabless company that designs magnetic sensors and power ICs for automotive and industrial markets, targeting high-growth applications such as electric vehicles (xEV), advanced driver-assistance systems (ADAS), clean energy, and data center power management. The company has grown its presence in automotive power electronics, including being selected as the sole supplier of current sensors for BMW electric vehicle drive inverters. ()